2018年第8期共收錄51篇
1. Effects of Dynamic High Pressure Microfluidzation on Property of Soybean Dietary Fiber from Biological Dissociation
Accession number: 20184406012699
Title of translation: 高壓微射流對(duì)生物解離大豆膳食纖維特性的影響
Authors: Wang, Huan (1); Tong, Xiaohong (1); Liu, Ling (1); Li, Hong (1); Hu, Miao (1); Jiang, Lianzhou (1)
Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Jiang, Lianzhou(jlzname@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 346-352
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The objective was to study the effects of biological dissociation and dynamic high pressure microfluidization (DHPM) on composition, physical and chemical properties and functional characteristics of soybean dietary fiber. The results showed that DHPM produced an increase of soluble dietary fiber (SDF) and a decrease of insoluble dietary fiber (IDF), and raised the IDF/SDF ration to 1.87; in addition, by comparing the contents of the remaining components of the biodissociated soybean dietary fiber with different treatment pressures, it was found that DHPM had no significant effect on the water content of the biodissected dietary fiber (P>0.05). DHPM also modified hydration propeities and oil holding capacity greatly, but it did not affect cation exchange capacity significantly; under the condition with pH value of 7, the difference of the adsorption capacity of heavy metal in dietary fiber with different pressures was not significant, and the adsorption effect of dietary fiber on the same heavy metal ion at pH value of 7 was higher than that at pH value of 2. The absorption of glucose by dietary fiber was increased with the increase of treatment pressure, and it was decreased slightly at 200 MPa. The glucose absorption capacity of dietary fiber treated with different pressures was increased with the increase of glucose concentration; the highest α-amylase inhibitory capacity was 18.42% from dietary fiber, which was increased by approximately 36%, 32%, 28% and 27%, respectively, in dietary fiber samples treated from 0 MPa to 150 MPa. The sample showed a higher bile acid binding capacity. Therefore, DHPM could be considered as good methods to improve the functionality of dietary fiber in soybean. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 39
Main heading: Fibers
Controlled terms: Dissociation? - ?Glucose? - ?Heavy metals? - ?High pressure effects? - ?Ion exchange? - ?Metal ions? - ?pH
Uncontrolled terms: Dietary fibers? - ?Dynamic high-pressure microfluidization? - ?Functional properties? - ?Physicochemical property? - ?Soluble dietary fiber
Classification code: 531 Metallurgy and Metallography
Metallurgy and Metallography
? - ?531.1 Metallurgy
Metallurgy
? - ?801.1 Chemistry, General
Chemistry, General
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?804.1 Organic Compounds
Organic Compounds
Numerical data indexing: Percentage 1.84e+01%, Percentage 2.70e+01%, Percentage 2.80e+01%, Percentage 3.20e+01%, Percentage 3.60e+01%, Pressure 0.00e+00Pa to 1.50e+08Pa, Pressure 2.00e+08Pa
DOI: 10.6041/j.issn.1000-1298.2018.08.041
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. Comparison of Physicochemical Properties of Magnetic Biochar-based Composites Prepared by Pyrolysis of Wheat Straw and Sawdust
Accession number: 20184406012692
Title of translation: 麥秸與木屑熱解制備磁性生物炭基材料理化性質(zhì)研究
Authors: Guo, Xiaohui (1, 2); Kang, Kang (1, 2); Wang, Yajun (1, 2); Liu, Qianqian (1, 2); Qiu, Ling (1, 2)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization, Ministry of Agriculture, Yangling; Shaanxi; 712100, China
Corresponding author: Qiu, Ling(xbgzzh@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 293-300
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Magnetic biochar-based composites were prepared by the methods of impregnation, chemical precipitation and anoxic pyrolysis using wheat straw and poplar sawdust as raw materials respectively. The effects of loading iron were studied at different pyrolysis temperatures based on the physiochemical characteristics. The results showed that the iron in the composites mainly existed in the forms of Fe3O4, and the outer layer content was higher than that in the inner layer. The loading-iron treatment accelerated the dehydrogenation and deoxygenation processes during biomass pyrolysis, and the influence tended to augment with increasing temperature. At the temperature of 300~600, the contents of ash in the biochar derived from wheat straw and sawdust was increased by loading iron within the ranges of 28.8~34.4 percentage points and 39.1~47.6 percentage points, respectively. Both of the fixed-carbon content and calorific value were reduced. The specific surface area and total pore volume were increased by loading iron within ranges of 10.67~72.24 m2/g, 0.039 8~0.093 1 cm3/g and 15.43~105.14 m2/g, 0.010 4~0.078 9 cm3/g, respectively. The average pore size was decreased. Different effects on the content of volatile matter of the wheat straw and sawdust derived biochars were indicated as well as on the pH values. The volatile content of wheat straw derived magnetic biochar was increased by 5.2~13.2 percentage points, while for the sawdust, the volatile content was reduced by 17.4 percentage points at 300, and then increased by 8.5~22.2 percentage points during 400~600. The pH value was decreased by 0.04~1.49 for the former but increased by 0.33~1.93 for the latter. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Loading
Controlled terms: Iron? - ?Iron oxides? - ?Magnetism? - ?Magnetite? - ?pH? - ?Pore size? - ?Precipitation (chemical)? - ?Pyrolysis? - ?Sawdust? - ?Straw
Uncontrolled terms: Bio chars? - ?Chemical precipitation? - ?Increasing temperatures? - ?Magnetic composites? - ?Physicochemical property? - ?Physio-chemical? - ?Wheat straw and sawdusts? - ?Wheat straws
Classification code: 545.1 Iron
Iron
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?701.2 Magnetism: Basic Concepts and Phenomena
Magnetism: Basic Concepts and Phenomena
? - ?801.1 Chemistry, General
Chemistry, General
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?802.3 Chemical Operations
Chemical Operations
? - ?804.2 Inorganic Compounds
Inorganic Compounds
? - ?811.2 Wood and Wood Products
Wood and Wood Products
? - ?821.5 Agricultural Wastes
Agricultural Wastes
? - ?951 Materials Science
Materials Science
Numerical data indexing: Specific_Surface_Area 1.07e+04m2/kg to 7.22e+04m2/kg, Specific_Surface_Area 1.54e+04m2/kg to 1.05e+05m2/kg
DOI: 10.6041/j.issn.1000-1298.2018.08.034
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Design and Optimization of Intelligent Irrigation Decision System in Litchi Orchard Based on Fuzzy Controller
Accession number: 20184406012661
Title of translation: 荔枝園智能灌溉決策系統(tǒng)模糊控制器設(shè)計(jì)與優(yōu)化
Authors: Xie, Jiaxing (1, 2); Gao, Peng (1); Mo, Haofan (1); Yu, Guoxiong (1, 3); Hu, Jie (1); Wang, Weixing (1, 4)
Author affiliation: (1) College of Electronic Engineering, South China Agricultural University, Guangzhou; 510642, China; (2) Guangdong Modern Agricultural Science and Technology Innovation Center for Intelligent Orchard, Guangzhou; 510642, China; (3) China Mobile Group Guangdong Co., Ltd., Jiangmen Branch, Jiangmen; 529030, China; (4) Guangdong Engineering Research Center for Monitoring Agricultural Information, Guangzhou; 510642, China
Corresponding author: Wang, Weixing(weixing@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 26-32 and 58
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to solve the problem about the serious waste of water resources for irrigation in litchi orchard, a fuzzy expert system was designed based on wireless sensor network according to the existing equipment conditions, and the fuzzy controller was optimized in order to improve the performance of this system. In this system, the environment information of litchi orchard was collected from sensor nodes through gateway nodes in real time. The error and changing rate of measured water content of soil and optimum moisture content of soil were selected as the decision factors and the results of forecasting irrigation values were obtained. The effectiveness of the system was analyzed by Matlab simulation and field test. Simulation results showed that this intelligent irrigation system based on the basic fuzzy controller can be combined with the timely and proper irrigation and it realized the economic irrigation effectively. And the optimized fuzzy irrigation system had better transient performance, control precision and anti-jamming, and the system response time was faster. Test results showed that the intelligent irrigation system based on the basic fuzzy controller can control the irrigation in litchi orchard effectively. It kept the soil moisture content at 17.8% in litchi orchard, which was good for the growth of litchi. The intelligent irrigation system based on the optimized fuzzy controller was able to control the average soil moisture content in litchi orchard at 17.6%, which was closer to the optimal soil moisture content of litchi orchard in the system. And it had a higher control accuracy, as well as stronger anti-interference and practicality. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Controllers
Controlled terms: Expert systems? - ?Fuzzy control? - ?Gateways (computer networks)? - ?Irrigation? - ?MATLAB? - ?Moisture determination? - ?Orchards? - ?Sensor nodes? - ?Soil moisture? - ?Water content ? - ?Water management
Uncontrolled terms: Design and optimization? - ?Environment information? - ?Intelligent irrigation systems? - ?Intelligent irrigations? - ?Litchi orchards? - ?Optimum moisture content? - ?Simulation? - ?Transient performance
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?722 Computer Systems and Equipment
Computer Systems and Equipment
? - ?723.4.1 Expert Systems
Expert Systems
? - ?731 Automatic Control Principles and Applications
Automatic Control Principles and Applications
? - ?732.1 Control Equipment
Control Equipment
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?921 Mathematics
Mathematics
? - ?944.2 Moisture Measurements
Moisture Measurements
Numerical data indexing: Percentage 1.76e+01%, Percentage 1.78e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.003
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
4. Development and Prospect of Key Technologies on Agricultural Tractor
Accession number: 20184406012659
Title of translation: 農(nóng)業(yè)拖拉機(jī)關(guān)鍵技術(shù)發(fā)展現(xiàn)狀與展望
Authors: Xie, Bin (1); Wu, Zhongbin (1); Mao, Enrong (1)
Author affiliation: (1) Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 1-17
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: As the core equipment of agricultural machinery, the tractors are rapidly becoming of increasing importance to agriculture. The technical advance of tractor products reflects the degree of national agricultural mechanization and the level of agricultural modernization. In recent years, novel structures and devices have been emerging on tractors, of which the technical level is constantly improved, and the overall performance keeps enhancing with the extensive application of various new technologies. Based on the analysis of the tractor development world-widely, the urgency and necessity of tractors to achieve automation, intelligentization and informatization were proposed. The latest researches on agricultural tractors in engine emission controlling, new energy altering, power shifting, continuously variable driving, front axle suspending, cab comforting, hitch electrohydraulic controlling, bus networking and system informatization were summarized. Meanwhile, the basic principles and characteristics of related technologies of each system were expounded combining with the application of specific products. Considering the national situation, the development direction of tractor technology was prospected with a historical and in-depth review of its development process. The precision agricultural system, which integrated high efficiency, energy saving, environmental protection and intelligence, benefiting from the rapid developing technologies of cloud computing, big data and internet of things, was thought to be a new model of future agriculture. Accordingly, intelligent perception and decision, efficient driving and remote controlling of intelligent tractors, which played an important role in the precision agriculture, were speculated to be the new bright spot and direction of tractor technology development in the future. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 88
Main heading: Tractors (agricultural)
Controlled terms: Agriculture? - ?Big data? - ?Distributed computer systems? - ?Drive axles? - ?Energy conservation? - ?Environmental technology? - ?Front axles? - ?Remote control? - ?Tractors (truck)
Uncontrolled terms: Agricultural mechanization? - ?Agricultural modernizations? - ?Development directions? - ?Informationization? - ?Intelligence? - ?Intelligent perception? - ?Key technologies? - ?Technology development
Classification code: 454 Environmental Engineering
Environmental Engineering
? - ?525.2 Energy Conservation
Energy Conservation
? - ?663.1 Heavy Duty Motor Vehicles
Heavy Duty Motor Vehicles
? - ?663.2 Heavy Duty Motor Vehicle Components
Heavy Duty Motor Vehicle Components
? - ?722.4 Digital Computers and Systems
Digital Computers and Systems
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?731.1 Control Systems
Control Systems
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
DOI: 10.6041/j.issn.1000-1298.2018.08.001
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
5. Design of Synchronous Detection System of Missing Filling Seeds and Suction Hole Blocking Based on Beam Blocking for Small Vegetable Grains
Accession number: 20184406012672
Title of translation: 光束阻斷式小粒蔬菜種子漏充與堵孔同步檢測系統(tǒng)研究
Authors: Li, Zhaodong (1, 2); Sun, Yuning (1); Yang, Wenchao (1); Wang, Weiwei (1); Zhang, Tian (1, 2); Chen, Liqing (1, 2)
Author affiliation: (1) School of Engineering, Anhui Agricultural University, Hefei; 230036, China; (2) Laboratory of Engineering of Intelligent Agricultural Machinery Equipment, Anhui Province, Hefei; 230036, China
Corresponding author: Chen, Liqing(lqchen@ahau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 119-126
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In view of missing filling seeds and suction hole blocking in the seeding process of small grain vegetable seeds in the pneumatic seed metering device, an approach for synchronous detecting the missing filling seeds and suction hole blocking of small grain vegetable seeds was proposed. Using the external interrupt and timer interrupt resources of ARM embedded system, the detection system determined the rotation speed of planter plate with a rotary encoder and adjusted the time window and the theoretical pulse frequency in real time. Then, the detection system collected the output pulse of the laser sensor and obtained the actual pulse frequency. By calculating the theoretical pulse frequency and the actual pulse frequency, the rate of missing filling seeds and rate of suction hole blocking were measured synchronously and displayed on the touch screen. With a synchronous detection by high speed camera system, experimental research on pneumatic precision metering device was carried out with the detection system. The seeds of three kinds of vegetables, such as white radish, middle double 11 rape and Shanghai pakchoi, were selected as the research objects. The test factors were the speed of planter plate and vacuum degree of suction chamber, and the rate of missing filling seeds and rate of suction hole blocking were used as test indexes. Experimental results showed that the system can adjust the time window automatically according to the rotation speed of planter plate. The relative deviation of missing filling seeds rate was not more than 1.67%, and the relative deviation of suction hole blocking rate was not more than 0.95%. This detection approach effectively solved missing filling seeds and suction hole blocking synchronous detection of small grain vegetable seeds in real time and provided a basis for analyzing the cause of seed drain and seeding device improvement design. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Filling
Controlled terms: High speed cameras? - ?Pneumatic materials handling equipment? - ?Pneumatics? - ?Touch screens? - ?Vegetables
Uncontrolled terms: Beam blocking? - ?Hole-blocking? - ?Seed metering devices? - ?Small particles? - ?Synchronous detection
Classification code: 632.3 Pneumatics
Pneumatics
? - ?632.4 Pneumatic Equipment and Machinery
Pneumatic Equipment and Machinery
? - ?691.1 Materials Handling Equipment
Materials Handling Equipment
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?722.2 Computer Peripheral Equipment
Computer Peripheral Equipment
? - ?742.2 Photographic Equipment
Photographic Equipment
? - ?821.4 Agricultural Products
Agricultural Products
Numerical data indexing: Percentage 1.67e+00%, Percentage 9.50e-01%
DOI: 10.6041/j.issn.1000-1298.2018.08.014
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
6. Physical Characteristics of Red Jujube in Different Grades and Its Influence on Classification Results
Accession number: 20184406012696
Title of translation: 不同等級(jí)新疆駿棗物理特征及其對(duì)分級(jí)結(jié)果的影響
Authors: Wu, Mingqing (1, 2); Li, Chuanfeng (2); Luo, Huaping (2); Yi, Xiaokang (2); Shakeel, Ahmed Soomro (1); Chen, Kunjie (1)
Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China; (2) College of Mechanic and Electrical Engineering, Tarim University, Alar; 843300, China
Corresponding author: Chen, Kunjie(kunjiechen@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 324-330
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to provide scientific basis for selection of grading parameters of jujube and formulation of quantitative grading standards, the main characteristic parameters of jujube produced in Xinjiang were measured and statistically analyzed. The changes occurring between characteristic parameters and the variation of each characteristic parameter of red jujube were also correlated. The data were analyzed and processed by box diagram, correlation diagram, cluster diagram, variance analysis and error analysis. Through clustering method, eight characteristic parameters of jujube were divided into five types, and the parameter errors produced by grading of different characteristics were analyzed and calculated. The results showed that all nine characteristic parameters except density were significantly affected by grading. The grade of jujube was increased with the decrease of standard deviation whereas a significant linear relationship was observed for the characteristic parameters and grading. There were different degrees of correlation between all nine characteristic parameters, the correlation between the contour area and contour perimeter was observed to be the highest, followed by length and length of the contour. Besides quality, density and short diameter, the density and other parameters were negatively correlated. Calculating the average error rate for different grades of characteristic parameters, it was concluded that the results were different while using different characteristic parameters for grading, the highest rate of misclassification was observed for density whereas the lowest was observed for perimeter, the higher the average error rate was, the worse the classification effect was. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Grading
Controlled terms: Classification (of information)? - ?Cluster analysis? - ?Error analysis
Uncontrolled terms: Characteristic parameters? - ?Classification results? - ?Correlation analysis? - ?Correlation diagrams? - ?Linear relationships? - ?Misclassifications? - ?Physical characteristics? - ?Red jujube
Classification code: 716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
DOI: 10.6041/j.issn.1000-1298.2018.08.038
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
7. Isolation, Identification and Inhibition of Pathogens from Red Pitaya Fruit during Storage
Accession number: 20184406012698
Title of translation: 紅肉火龍果采后病原菌分離鑒定與植物精油抑菌研究
Authors: Liu, Ruiling (1, 2); Gao, Haiyan (1, 2); Chen, Hangjun (1, 3); Fang, Xiangjun (1, 3); Wu, Weijie (1, 4)
Author affiliation: (1) Food Science Institute, Zhejiang Academy of Agricultural Science, Hangzhou; 310021, China; (2) Key Laboratory of Post-harvest Handling of Fruits, Ministry of Agriculture, Hangzhou; 310021, China; (3) Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou; 310021, China; (4) Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou; 310021, China
Corresponding author: Gao, Haiyan(spsghy@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 338-345
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Red pitaya fruit is highly susceptible to fungal infection during postharvest, causing quality deterioration and huge economic losses. This research was intended to isolate, purify and identify the pathogens which cause rotting of red pitaya during storage in Zhejiang Province, screen essential oils for controlling the pathogenic isolates, and test their effectiveness. HS3 and HS6 were identified as pathogens through isolation, purification and pathogenicity tests. These two strains were proved as F. proliferatum and C. fructicola by morphological identification and rDNA-ITS molecular identification. Six essential oils were investigated for their activity to control these pathogens. The result indicated that carvacrol, cinnamon and thyme oil showed complete inhibitory effect on all pathogens at a concentration of 2 000 μL/L. Then, the inhibitory effects of carcanol, cinnamon and thyme oil on these two pathogens were studied by direct contact in vitro and in vitro fumigation. It was found that carcanol showed higher antifungal activity against F. proliferatum and C. fructicola than cinnamon and thyme in the drug sensitivity test. Moreover, essential oil fumigation inhibited the decay incidence of pitaya fruit inoculated with F. proliferatum and C. fructicola during storage at 4 and carcanol showed the best effect. Carcanol oil seemed to be a promising potential fumigant. The results can provide reference for disease control during storage of red pitaya in Zhejiang Province. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Pathogens
Controlled terms: Controlled drug delivery? - ?Deterioration? - ?Disease control? - ?Essential oils? - ?Fruits? - ?Fumigation? - ?Losses? - ?Plants (botany)
Uncontrolled terms: Anti-fungal activity? - ?Antibacterial effects? - ?Isolation and identification? - ?Molecular identification? - ?Morphological identifications? - ?Postharvest decays? - ?Quality deteriorations? - ?Red pitaya
Classification code: 461.9 Biology
Biology
? - ?804.1 Organic Compounds
Organic Compounds
? - ?821.4 Agricultural Products
Agricultural Products
? - ?911.2 Industrial Economics
Industrial Economics
? - ?951 Materials Science
Materials Science
DOI: 10.6041/j.issn.1000-1298.2018.08.040
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
8. Effect of Enzymatic Species on Function and Bitterness of Enzyme-assisted Aqueous Extraction Soybean Protein Hydrolysates
Accession number: 20184406012702
Title of translation: 酶種類對(duì)生物解離大豆蛋白酶解物功能性和苦味的影響
Authors: Jiang, Lianzhou (1); Tong, Xiaohong (1); Liu, Baohua (1); Wang, Huan (1); Zhang, Qiaozhi (1); Li, Yang (1)
Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Li, Yang(liyanghuangyu@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 368-374
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Enzyme-assisted aqueous extraction process is a green oil extraction technology,which has advanced in recent years, may be a effective alternative technology to separate oil and protein from soybeans. It will be accompanied by cream, skim and residual fraction in the enzyme-assisted aqueous extraction process.The main component in the skim is soy protein hydrolysates. Different types of proteases (Alcalase, Neutrase, Papain, Bromelain, Flavourzyme, Protamex and Trypsin) were used to hydrolyze the extruded soybean flour. Different kinds of protein hydrolysates were used as the research objects. The structure of soybean protein hydrolysates was characterized by degree of hydrolysis, SDS-polyacrylamide gel electrophoresis, amino acid composition analysis and Fourier transform infrared spectroscopy. Solubility, emulsion activity index and emulsion stability index characterized the functional of the soy protein hydrolysates. The bitterness value of the soy protein hydrolysates was obtained by sensory evaluation. The results indicated that when using Alcalase for enzyme-assisted aqueous extraction, the highest oil extraction rate was 91.23% and the solubility of soybean protein hydrolyzate was 91.12%. However, the bitterness value of the hydrolyzate was increased greatly which was 4, the emulsion activity index and emulsion stability index were not good. When using Flavourzyme for enzyme-assisted aqueous extraction treatment, the oil extraction was 87.73% and the solubility was 87.12%. However, the bitterness of the hydrolyzates was only 1.5, thus the sensory evaluation was the best. And the hydrolyzates had the best emulsion activity index and emulsion stability index. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Hydrolysis
Controlled terms: Electrophoresis? - ?Emulsification? - ?Enzymes? - ?Extraction? - ?Fourier transform infrared spectroscopy? - ?Function evaluation? - ?Functions? - ?Sensory analysis? - ?Solubility? - ?Soybean oil
Uncontrolled terms: Alternative technologies? - ?Amino acid compositions? - ?Bitterness? - ?Enzyme-assisted aqueous extractions? - ?Protein hydrolysate? - ?SDS-polyacrylamide gel electrophoresis? - ?Soy protein hydrolysate? - ?Soybean protein hydrolysates
Classification code: 801 Chemistry
Chemistry
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?802.3 Chemical Operations
Chemical Operations
? - ?804.1 Organic Compounds
Organic Compounds
? - ?921 Mathematics
Mathematics
? - ?921.6 Numerical Methods
Numerical Methods
Numerical data indexing: Percentage 8.71e+01%, Percentage 8.77e+01%, Percentage 9.11e+01%, Percentage 9.12e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.044
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
9. Monitoring Technology of Farmland Soil Environment Based on Passive RFID Sensor Tag
Accession number: 20184406012680
Title of translation: 基于無源RFID傳感標(biāo)簽的農(nóng)田土壤環(huán)境監(jiān)測技術(shù)研究
Authors: Deng, Fangming (1); Wu, Xiang (1); Li, Bing (2); Wang, Tao (2); Liu, Jun (1)
Author affiliation: (1) School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang; 330013, China; (2) School of Electrical Engineering and Automation, Hefei University of Technology, Hefei; 230009, China
Corresponding author: Wu, Xiang(13755633966@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 187-193 and 202
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The information of soil environment is one of the most important information parameters in precision agriculture. There are some disadvantages lie in current wireless sensor networks in agriculture, including long-time monitoring, environmental protection and tracking ability. According to these disadvantages, a novel wireless monitoring method was proposed based on radio frequency identification (RFID) sensor tag. The RFID sensor tag was based on ultra-high frequency (UHF) electronic product code (EPC) 2nd generation communication protocol and worked on a passive mode. A new method of data fusion was also proposed. Compared with the traditional data fusion method, the power consumption and response time of the system were significantly reduced. Because of the complex composition of farmland soil, the loss of electromagnetic wave transmission in farmland soil and the basic conditions for the normal work of the tag were determined. In view of the fact that the transmission accuracy of sensor labels was insufficient when the embedding depth was more than 30cm, two sensor tags at the same measurement point were proposed, and higher data transmission accuracy was obtained through the polarization direction of antennas. The communication performances and the temperature and humidity performances of the proposed sensor tag were tested in laboratory. The experimental results showed that the proposed sensor tag exhibited good consistence with conventional methods. The maximum error of the temperature test was not more than 1.5%, and the maximum error of the humidity test was not more than 1%. Compared with the existing soil environment monitoring methods, it had the advantages of convenience, low cost, long life and rapid positioning. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Wireless sensor networks
Controlled terms: Data fusion? - ?Electromagnetic waves? - ?Farms? - ?Monitoring? - ?Precision agriculture? - ?Radio frequency identification (RFID)? - ?Soils? - ?Wave transmission
Uncontrolled terms: Communication performance? - ?Electronic product codes? - ?Monitoring technologies? - ?Polarization direction? - ?RFID sensors? - ?Soil environment? - ?Temperature and humidities? - ?Ultra High Frequency (UHF)
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?711 Electromagnetic Waves
Electromagnetic Waves
? - ?716.3 Radio Systems and Equipment
Radio Systems and Equipment
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing: Percentage 1.00e+00%, Percentage 1.50e+00%, Size 3.00e-01m
DOI: 10.6041/j.issn.1000-1298.2018.08.022
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
10. Optimization of Drying Process Parameters of Solar Herbage Dry Equipment
Accession number: 20184406012671
Title of translation: 太陽能牧草干燥成套設(shè)備干燥工藝參數(shù)優(yōu)化
Authors: Qian, Wang (1); Yang, Shikun (1); Liu, Guilin (1); He, Gang (1); Wang, Zhenhua (1); Du, Jianqiang (1)
Author affiliation: (1) Hohhot Branch of Chinese Academy of Agricultural Mechanization Sciences Co.,Ltd., Huhhot; 010010, China
Corresponding author: Yang, Shikun(yskun001@sohu.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 110-118
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Solar-thermal technology was widely applicated in the field of alfalfa drying already, Solar low temperature drying technology can minimize the loss of alfalfa nutrient compositions. The aim was to improve solar drying efficiency and optimize the drying process parameters of 9TGK-1.5 solar grass drying unit equipment. Firstly, the factors influencing the drying of alfalfa was studied. The experiment and analysis of the low temperature drying process of alfalfa were studied through drying test bed. The changing rules of drying temperatures, wind speeds, drying rates, drying base moistures and drying times were found out. The conclusion was obtained that in the first stage of drying process, the temperature can be chosen as 50, wind speed can be 1.5 m/s in order to save energy. When drying process in the second and third stages, in order to achieve the effect of rapid drying, the temperature can be chosen as 50, wind speed can be 2.5 m/s. Experiment results showed that the Page equation was consistent with the drying process of alfalfa. The fitting regression of drying model of alfalfa was completed. The optimized parameters were adopted to improve the efficiency of alfalfa by 34.4%. It can improve the effective control of aromatic amino acid volatilization and protein denaturation, and increase the content of crude protein and carotene in alfalfa hay. The research result provided an optimized basis for the design of the related parameters of solar drying technology and drying equipment. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Drying
Controlled terms: Low temperature drying? - ?Proteins? - ?Solar dryers? - ?Solar energy? - ?Temperature? - ?Wind
Uncontrolled terms: Alfalfa? - ?Drying process? - ?Experiment and analysis? - ?Nutrient composition? - ?Parameter optimization? - ?Protein denaturation? - ?Solar drying technology? - ?Solar thermal technology
Classification code: 443.1 Atmospheric Properties
Atmospheric Properties
? - ?641.1 Thermodynamics
Thermodynamics
? - ?657.1 Solar Energy and Phenomena
Solar Energy and Phenomena
? - ?802.3 Chemical Operations
Chemical Operations
? - ?804.1 Organic Compounds
Organic Compounds
Numerical data indexing: Percentage 3.44e+01%, Velocity 1.50e+00m/s, Velocity 2.50e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.013
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
11. Numerical Simulation of Soil Moisture Movement under Different Depths Irrigation for Winter Wheat
Accession number: 20184406012686
Title of translation: 冬小麥不同深度灌水條件下土壤水分運(yùn)動(dòng)數(shù)值模擬
Authors: Guo, Xianghong (1); Sun, Xihuan (1, 2); Ma, Juanjuan (1); Lei, Tao (1); Zheng, Lijian (1); Wang, Pu (1)
Author affiliation: (1) College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (2) Jinzhong University, Jinzhong; 030619, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 237-244 and 209
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In northern China, drought and shortage of water resources are very serious and have seriously affected the production of winter wheat. Choosing a reasonable irrigation method to improve the deep soil water use efficiency is of great significance to water saving and efficiency increase of winter wheat. The deep irrigation of winter wheat can promote deep rooting and improve water use efficiency. In order to quantitatively calculate soil moisture dynamics under deep irrigation conditions, the soil water movement models under different depths irrigation of winter wheat was established based on different depths irrigation experiments of winter wheat and the source terms of soil moisture equations were used to simulate different depths of irrigation. The model was solved by the finite difference method. The model was validated by the experimental data of winter wheat at different depths of irrigation. The results showed that the soil water content calculated by the model was in accordance with the dynamic change trend of the measured soil moisture content. The simulated and measured soil moisture contents were significantly related, the correlation coefficient was greater than 0.90, the maximum absolute error of the model was 0.023 cm3/cm3, the maximum of the average relative error was 8.22%, and the maximum value of the root mean square error was 0.3 cm3/cm3. Therefore, the model had higher simulation accuracy and can be used to simulate the distribution and dynamic changes of soil moisture in winter wheat under different irrigation depths. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Soil moisture
Controlled terms: Computer simulation? - ?Crops? - ?Efficiency? - ?Errors? - ?Finite difference method? - ?Irrigation? - ?Mean square error? - ?Moisture determination? - ?Numerical models? - ?Water conservation ? - ?Water content? - ?Water resources
Uncontrolled terms: Average relative error? - ?Correlation coefficient? - ?Maximum absolute error? - ?Root mean square errors? - ?Soil moisture dynamics? - ?Soil water movement? - ?Water use efficiency? - ?Winter wheat
Classification code: 444 Water Resources
Water Resources
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?723.5 Computer Applications
Computer Applications
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
? - ?921 Mathematics
Mathematics
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
? - ?944.2 Moisture Measurements
Moisture Measurements
Numerical data indexing: Percentage 8.22e+00%
DOI: 10.6041/j.issn.1000-1298.2018.08.028
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
12. Design and Test of Monitoring System of No-tillage Planter Based on Cortex-M3 Processor
Accession number: 20184406012664
Title of translation: 基于Cortex-M3的免耕播種機(jī)監(jiān)控系統(tǒng)設(shè)計(jì)與試驗(yàn)
Authors: Sun, Yongjia (1); Shen, Jingxin (1); Dou, Qingqing (1); Li, Qinglong (1); Chen, Gang (1); Sun, Yitian (1)
Author affiliation: (1) Shandong Academy of Agricultural Machinery Sciences, Ji’nan; 250100, China
Corresponding author: Sun, Yitian(sytde@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 50-58
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: At present, the anti-dust effect is poor and the monitoring precision is low for the monitoring sensor of domestic fertilization planter. Besides it can not adjust the amount of fertilizer. A monitoring system of fertilization seeder based on Cortex-M3 processor was designed in order to settle these problems. The system could adjust the amount of fertilizer according to the working speed. It also could monitor conditions of seeding and fertilizing in time, count quantity of seeding and area statistic. When the fault occurred, it would send out alarm by buzzer and show fault type. The system adopted one piece of silicon photoelectric diode which had a large photosensitive area as receiving component and three infrared light emitting diode (LEDs) to design the seed sensor, which contained a vitreous dust cover. The structural and installation parameters of sensor were optimized to eliminate monitoring blind area. All the above helped to improve the dust-laden environmental adaptability and accuracy of monitoring system. The system adopted outer groove-wheel to design fertilizer apparatus which was driven by a worm-gear direct current(DC)motor with the rated voltage of 12 V and power of 50 W. Besides one end of worm shaft was connected to outer groove-wheel and the other connected to an incremental encoder for motor speed measurement. The encoder’s accuracy was 100 P/R (pulses/revolution). The main hardware circuits such as sensor signal acquisition circuit, motor drive circuit and controller area network (CAN) bus interface circuit were designed by Altium Designer software. The display interface contained three parts: main interface, setting interface and query interface. They were designed based on four rows corn planter. The seeding performance of each row was displayed in the form of a number and ring icon. The numbers showed specific seeding values. When the performance became poor, the ring icon was turned from green to red. The software development environment was Keil uVision5, and the program was written in C language. The system adopted incremental proportion integration differentiation (PID) control algorithm for the speed adjustment of fertilization motor. Lab test showed that when presetting fertilization amount was 75 kg/hm2, the work breadth was 2.6 m, speed was 3 km/h, 4 km/h, 5 km/h, 6 km/h and 7 km/h, respectively, fertilization was varied with the speed. Fertilization deviations were 2.88%, 4.63%, 0.74%, 2.47% and 3.17%, respectively. When presetting motor rotation speed was 150 r/min, seeding quantity counting deviation of the system were within 4%. The monitoring system was installed on no-tillage corn precision planter of Debont company to conduct a field trial. When presetting fertilization amount was 75 kg/hm2, vehicle run 1 000 m with a stable speed of 3 km/h, 4 km/h, 5 km/h, 6 km/h and 7 km/h, respectively, the coefficient of variation of fertilization were 1.70%, 1.98%, 1.92%, 1.76% and 2.63%, respectively. Meanwhile, fertilization deviation was less than 5%. Therefore, consistency and accuracy of the system were good, which could meet the requirement of actual production. The study provided reference for the research of variable rate fertilization control technology and development of intelligent monitoring system. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Monitoring
Controlled terms: Agriculture? - ?Algorithms? - ?C (programming language)? - ?Control system synthesis? - ?Controllers? - ?Dust? - ?Electric drives? - ?Fertilizers? - ?Integrated circuit design? - ?Signal encoding ? - ?Software design? - ?Speed? - ?Wheels
Uncontrolled terms: Controller area networkbus? - ?Infrared light emitting diodes? - ?Intelligent monitoring systems? - ?Monitoring system? - ?No-tillage planter? - ?Proportion integration differentiation control(PID)? - ?Software development environment? - ?Variable rate fertilization
Classification code: 451.1 Air Pollution Sources
Air Pollution Sources
? - ?601.2 Machine Components
Machine Components
? - ?714.2 Semiconductor Devices and Integrated Circuits
Semiconductor Devices and Integrated Circuits
? - ?716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?731.1 Control Systems
Control Systems
? - ?732.1 Control Equipment
Control Equipment
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing: Percentage 1.70e+00%, Percentage 1.76e+00%, Percentage 1.92e+00%, Percentage 1.98e+00%, Percentage 2.47e+00%, Percentage 2.63e+00%, Percentage 2.88e+00%, Percentage 3.17e+00%, Percentage 4.00e+00%, Percentage 4.63e+00%, Percentage 5.00e+00%, Percentage 7.40e-01%, Power 5.00e+01W, Rotational_Speed 1.50e+02RPM, Size 1.00e+03m, Size 2.60e+00m, Velocity 1.11e+00m/s, Velocity 1.39e+00m/s, Velocity 1.67e+00m/s, Velocity 1.94e+00m/s, Velocity 8.33e-01m/s, Voltage 1.20e+01V
DOI: 10.6041/j.issn.1000-1298.2018.08.006
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
13. Design and Optimization Experiment of Anti-blocking Mechanism of No-tillage Planter for Grand Ridge with Raw Corn Stubble
Accession number: 20184406012665
Title of translation: 大壟玉米原茬地免耕播種機(jī)防堵裝置設(shè)計(jì)與優(yōu)化試驗(yàn)
Authors: Chen, Haitao (1); Hou, Lei (1); Hou, Shouyin (1); Li, Yu (1); Min, Shiyao (1); Chai, Yuduo (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 59-67
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: For the blocking circumstance in the no-tillage planting operation for grand ridge with crushed raw corn stubble produced by corn harvester in north cold area and slower recovery of ground temperature after planting operation. In order to solve these problems above, an anti-blocking mechanism of no-tillage planter for grand ridge with raw corn stubble was designed. Corn stubble was positioned on the seeding belt, which was continuously struck by the force of cleaning rotating blade on the anti-blocking mechanism. So that the corn stubble reached furrow between adjacent grand ridges, the clean seeding belt on grand ridge was produced for guaranteeing the operation quality of ditch-opening, seeding, soil-covering and compacting. Through theoretical analysis, the key parts of anti-blocking mechanism were designed, and then structure and operation parameters of the mechanism were determined. Orthogonal experiment design of three factors and three levels and fuzzy comprehensive evaluation method were employed for finding the optimal parameter combination of anti-blocking mechanism. Meanwhile, the working speed of equipment, the rotation speed of cleaning blade assembly, the angle between direction of opretion speed and vertical plane rotation axis of cleaning blade assembly were selected as factors. Stubble-cleaning rate, straw-cleaning rate and equivalent power dissipation of anti-blocking mechanism were selected as indexes. The result showed that the working speed of equipment had very significant effect on stubble-cleaning rate. The rotation speed of cleaning blade assembly and the angle between direction of opretion speed and vertical plane rotation axis of cleaning blade assembly had significant effect on the stubble-cleaning rate; the rotation speed of cleaning blade assembly had very significant effect on the straw-cleaning rate. The working speed of equipment, the angle between direction of opretion speed and vertical plane rotation axis of cleaning blade assembly had significant effect on the straw-cleaning rate. The working speed of equipment and the rotation speed of cleaning blade assembly had very significant effect on the equivalent power dissipation of anti-blocking mechanism. Within the range of experimental conditions and experiment factors, the optimal combination result of parameters that influencing multi-objective function showed that when the working speed of equipment was 5.4 km/h and the rotation speed of cleaning blade assembly was 440 r/min, the angle between direction of opretion speed and vertical plane rotation axis of cleaning blade assembly was 20°, the obtained indexes were as follows: the stubble-cleaning rate was 93.94%, the straw-cleaning rate was 95.39%, the equivalent power dissipation of anti-blocking mechanism was 4.36 kW, the soil disturbance was 31.9%. The result can provide references for design of no-tillage planter for grand ridge with crushed raw corn stubble produced by corn harvester in north cold area. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Cleaning
Controlled terms: Agriculture? - ?Electric losses? - ?Harvesters? - ?Rotation? - ?Speed
Uncontrolled terms: Anti-blocking mechanisms? - ?Blade assemblies? - ?Corn? - ?Fuzzy comprehensive evaluation method? - ?Multi-objective functions? - ?No-till planters? - ?Optimal parameter combinations? - ?Orthogonal experiment design
Classification code: 802.3 Chemical Operations
Chemical Operations
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?931.1 Mechanics
Mechanics
Numerical data indexing: Percentage 3.19e+01%, Percentage 9.39e+01%, Percentage 9.54e+01%, Power 4.36e+03W, Rotational_Speed 4.40e+02RPM, Velocity 1.50e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.007
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
14. Tea Variety Identification Based on Low-rank Stacked Auto-encoder and Hyperspectral Image
Accession number: 20184406012695
Title of translation: 基于低秩自動(dòng)編碼器及高光譜圖像的茶葉品種鑒別
Authors: Sun, Jun (1); Jin, Haitao (1); Wu, Xiaohong (1); Lu, Hu (2); Shen, Jifeng (1); Dai, Chunxia (1)
Author affiliation: (1) School of Electrical and Information Engineering, Jiangsu University, Zhenjiang; 212013, China; (2) School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang; 212013, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 316-323
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Five different varieties of tea samples were classified with the method combining stacked auto-encoder (SAE) with low-rank matrix recovery (LRMR). The hyperspectral imaging system with spectrum range of 431~962 nm was used to collect five kinds of tea samples containing 618 bands of hyperspectral images, including Huangshan green tea, Longjing, Yixing Mao Feng, Yunwu green tea and Biluochun. The ENVI software was used to determine the region of interest (ROI) of the hyperspectral images, and the average spectral data of the sample in ROI were extracted as the raw spectral information of the sample. Due to the large amount, strong redundancy and much noise of the hyperspectral information, the low-rank stacked auto-encoder (LR-SAE), which combined the stacked auto-encoder and the low-rank matrix recovery, was used to reduce the dimensionality of the hyperspectral data of the tea samples. Support vector machine (SVM) and Softmax classification model were applied to identify the tea samples after dimensionality reduction. The 5-fold cross validation experiment results showed that the accuracy of prediction set of LR-SAE-SVM model was 99.37%, and that of SAE-SVM model was 98.82%. As for Softmax classification, the accuracy of prediction set of LR-SAE-Softmax model was 99.04%, and that of SAE-Softmax model was 97.99%. The results showed that the accuracy of the classification model based on LR-SAE was improved on some degree and the LR-SAE had better robustness than the traditional SAE without de-noising. It was feasible and efficient to apply the classification model based on LR-SAE into tea variety identification. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Hyperspectral imaging
Controlled terms: Image segmentation? - ?Independent component analysis? - ?Matrix algebra? - ?Recovery? - ?Signal encoding? - ?Spectroscopy? - ?Support vector machines
Uncontrolled terms: Auto encoders? - ?Dimensionality reduction? - ?HyperSpectral? - ?Low-rank matrix recoveries? - ?Variety identification
Classification code: 716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?921.1 Algebra
Algebra
Numerical data indexing: Percentage 9.80e+01%, Percentage 9.88e+01%, Percentage 9.90e+01%, Percentage 9.94e+01%, Size 4.31e-07m to 9.62e-07m
DOI: 10.6041/j.issn.1000-1298.2018.08.037
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
15. Kinematic and Dynamic Modeling of Parallel-serial Hybrid Stabilizing Crane Mechanism
Accession number: 20184406012708
Title of translation: 并串混聯(lián)穩(wěn)定克令吊運(yùn)動(dòng)學(xué)與動(dòng)力學(xué)建模
Authors: Li, Erwei (1, 2); Zhao, Tieshi (1, 2); Hu, Qiangqiang (1, 2); Wang, Chang (1, 2); Geng, Mingchao (3)
Author affiliation: (1) Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Laboratory, Yanshan University, Qinhuangdao; 066004, China; (2) Key Laboratory of Advanced Forging and Stamping Technology and Science, Ministry of Education, Yanshan University, Qinhuangdao; 066004, China; (3) College of Mechanical Engineering, Hebei University of Architecture, Zhangjiakou; 075000, China
Corresponding author: Zhao, Tieshi(tszhao@ysu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 411-419 and 49
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Stabilizing crane plays an important role in the lifting of cargo between ships and offshore platforms, such as wind turbine and drilling platform under high sea conditions. According to the characteristics of motion compensation offshore, a parallel-serial hybrid stabilizing crane mechanism was proposed. The parallel part is a two degrees of freedom (DOF) rotational parallel mechanism (RPM), which has two continuously rotational DOF. The parallel part, with a virtual continuous axis, can isolate the impact of the rolling and pitching of the moored ship to provide a stable base for the serial part: PRRP kinematic chain. The serial part has the degree of heave, yaw, tilt and telescope. The whole stabilizing crane can keep the end point of the crane staying still relative to the earth. Firstly, the hybrid mechanism was described and the corresponding coordinate systems were established. Then, assuming the parallel part and the first P kinematic pair of the serial part compensated the motion of the moored ship, in the non-inertial system, combined the vector method and screw velocity and acceleration theories, the kinematic model of end of the stable gangway stabilizing at a fixed point was established in accordance with the sequence of the parallel part and the serial part. Based on Newton-Euler formulas in screw form and combined D’Alembert principle and virtual work principle, the dynamic model of the hybrid mechanism was established in accordance with the sequence of the serial part and the parallel part. Finally, the correctness of the models was verified by a numerical example. The work laid a theoretical foundation for the engineering application of the stabilizing crane. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Dynamics
Controlled terms: Cranes? - ?Degrees of freedom (mechanics)? - ?Drilling platforms? - ?Kinematics? - ?Mechanisms? - ?Motion compensation? - ?Offshore oil well production? - ?Screws? - ?Ships? - ?Wind turbines
Uncontrolled terms: Engineering applications? - ?Hybrid? - ?Non-inertial systems? - ?Rotational parallel mechanisms? - ?Screw theory? - ?Theoretical foundations? - ?Two degrees of freedom? - ?Virtual work principle
Classification code: 511.1 Oil Field Production Operations
Oil Field Production Operations
? - ?511.2 Oil Field Equipment
Oil Field Equipment
? - ?601.3 Mechanisms
Mechanisms
? - ?605 Small Tools and Hardware
Small Tools and Hardware
? - ?615.8 Wind Power (Before 1993, use code 611 )
Wind Power (Before 1993, use code 611 )
? - ?693.1 Cranes
Cranes
? - ?931.1 Mechanics
Mechanics
DOI: 10.6041/j.issn.1000-1298.2018.08.050
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
16. Design and Experiment of Electric Drive System for Pure Electric Tractor
Accession number: 20184406012705
Title of translation: 純電動(dòng)拖拉機(jī)電驅(qū)動(dòng)系統(tǒng)設(shè)計(jì)與試驗(yàn)
Authors: Chen, Liqing (1, 2); Zhan, Qingfeng (1, 2); Wang, Weiwei (1, 2); Huang, Xin (1, 2); Zheng, Quan (1, 2)
Author affiliation: (1) College of Engineering, Anhui Agricultural University, Hefei; 230036, China; (2) Anhui Intelligent Agricultural Machinery and Equipment Engineering Laboratory, Hefei; 230036, China
Corresponding author: Zheng, Quan(zhengquan@ahau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 388-394
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Traditional tractors have caused great problems in resources and environment. It is an urgent task to carry out the research of pure electric tractors. The electric drive system is the core of pure electric tractor. According to the tractor’s working characteristics and transmission characteristics, a tractor electric drive system was designed based on hilly and mountainous area. It included the determination of electric drive transmission scheme, matching of driving motor parameters, design of characteristic parameters of the transmission mechanism and the power output mechanism, etc. And the Romax design analysis and strength checking of the transmission mechanism were also carried out. The fatigue design requirements met the analysis of bending stress, torque stress and damage degree of the axis. Finally, the system was tested for the external characteristics, transmission efficiency, noise and reliability on the electrically driven towing test bench built. The test results showed that the electric drive system can satisfy the characteristic requirements of the tractor tillage working condition, and it verified the rationality of the design of electric drive system. The transmission efficiency was 72%~94% under the low-running conditions of 1000r/min or less, the output torque can be stabilized; in the range of 1 000~3 000 r/min, the output power can be stabilized to meet the tractor’s requirements under the cultivating conditions and transport conditions, which was better than that of the traditional fuel tractor. It proved that the electric drive system designed met the requirements. The electric drive system design laid a solid foundation for the development of subsequent electric tractors. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Transmissions
Controlled terms: Automobile testing? - ?Design? - ?Efficiency? - ?Electric drives? - ?Systems analysis? - ?Tractors (agricultural)? - ?Tractors (truck)
Uncontrolled terms: Electric drive system? - ?External characteristic? - ?Hilly and mountainous areas? - ?Performance tests? - ?Transmission characteristics? - ?Transmission efficiency? - ?Transmission mechanisms? - ?Transmission schemes
Classification code: 602.2 Mechanical Transmissions
Mechanical Transmissions
? - ?662 Automobiles and Smaller Vehicles
Automobiles and Smaller Vehicles
? - ?663.1 Heavy Duty Motor Vehicles
Heavy Duty Motor Vehicles
? - ?913.1 Production Engineering
Production Engineering
? - ?961 Systems Science
Systems Science
Numerical data indexing: Rotational_Speed 1.00e+03RPM, Rotational_Speed 1.00e+03RPM to 3.00e+03RPM
DOI: 10.6041/j.issn.1000-1298.2018.08.047
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
17. Design and Experiment on Adjusting Mechanism of Concave Clearance of Combine Harvester Cylinder
Accession number: 20184406012666
Title of translation: 聯(lián)合收獲機(jī)脫粒滾筒凹板間隙調(diào)節(jié)裝置設(shè)計(jì)與試驗(yàn)
Authors: Li, Yaoming (1); Wang, Jianpeng (1); Xu, Lizhang (1); Tang, Zhong (1); Xu, Zhenghua (2); Wang, Kejiu (2)
Author affiliation: (1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China; (2) Manufacturer of High Quality Agricultural Machinery Products, Suzhou; 215000, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 68-75
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To solve problems, such as threshing cylinder blockage and the decline of operating performance caused by feeding rates fluctuation in the field, the device for adjusting concave clearance and monitoring threshing cylinder load was designed. The designed device and system consisted of concave clearance adjusting system and the oil pressure monitoring system on the rear side of the concave. The oil pressure on the rear side of the concave was used to reflect the threshing cylinder load. During the field test, the oil pressure on the rear side of concave was monitored. The STM32 microcontroller was used to collect and preserve the signal of oil pressure signal on the rear side of concave. During the field test, the relationship between the oil pressure and the feeding rates was analyzed. The influence of concave clearance on the oil pressure on the rear side of concave was analyzed in detail. The results verified that the designed concave clearance adjustment device can adjust the concave clearance rapidly and stably. The displacement sensor can display concave clearance in real-time. The adjustment range of concave clearance was 35~60 mm, the speed of the hydraulic cylinder can be adjusted in the range of 0~10 mm/s. The oil pressure on the rear side of the concave tended to increase with the increase of feeding rates. The function relationship between the oil pressure on the rear side of the concave and the feed rates was obtained by analyzing the obtained experimental data, and the corresponding correlation coefficient was 0.981 3, which indicated that the function was consistent with the theoretical analysis. It was verified that the threshing and separating loss was increased with the increase of feeding rates. More concretely, when the feeding rate was increased from 3.4 kg/s to 6.0 kg/s, the oil pressure on the rear side of the concave was increased from 732 N to 1 114 N, and the threshing and separating loss was increased from 0.54% to 1.08%. Under the rated feeding rates (6.0 kg/s), when the crop was evenly fed, the hydraulic pressure of the left and right cylinders was fluctuated in the range of 450~660 N, the pressure change of the left and right cylinder was consistent with each other. The oil pressure on the rear side of concave tended to decrease as the concave clearance was increased. The threshing and separating loss was increased as the increase of concave clearance. In case that the concave clearance was increased from 35 mm to 45 mm, the oil pressure on rear side of concave was decreased from 1 114 N to 758 N, and the threshing and separating loss was increased from 1.08% to 1.31%. It proved that it was feasible to reduce the threshing cylinder load by increasing the concave clearance. Under the conditions that the feeding rate was 6.0 kg/s and concave clearance was 35 mm, the threshing and separating system had the best performance, the corresponding pressure on rear side of concave was 900~1 320 N. The concave clearance adjust device can achieve a fast and stable regulation which provided a scientific basis for adjusting the concave clearance automatically according to the load of threshing cylinder load. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Combines
Controlled terms: Agriculture? - ?Cylinders (shapes)? - ?Feeding? - ?Harvesters? - ?Separation
Uncontrolled terms: Adjusting mechanism? - ?Combine harvesters? - ?Concave clearances? - ?Correlation coefficient? - ?Displacement sensor? - ?Function relationships? - ?Operating performance? - ?Threshing and separating
Classification code: 691.2 Materials Handling Methods
Materials Handling Methods
? - ?802.3 Chemical Operations
Chemical Operations
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
Numerical data indexing: Force 1.11e+03N to 7.58e+02N, Force 4.50e+02N to 6.60e+02N, Force 7.32e+02N to 1.11e+03N, Force 9.00e+02N to 1.32e+03N, Mass_Flow_Rate 3.40e+00kg/s to 6.00e+00kg/s, Mass_Flow_Rate 6.00e+00kg/s, Percentage 1.08e+00% to 1.31e+00%, Percentage 5.40e-01% to 1.08e+00%, Size 3.50e-02m, Size 3.50e-02m to 4.50e-02m, Size 3.50e-02m to 6.00e-02m, Velocity 0.00e+00m/s to 1.00e-02m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.008
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
18. Design and Experiment of Intelligent Farming Device for Vegetables Based on Android
Accession number: 20184406012662
Title of translation: 基于Android系統(tǒng)的蔬菜智能耕作裝置設(shè)計(jì)與試驗(yàn)
Authors: Ji, Jiangtao (1, 2); Li, Mingyong (1); Jin, Xin (1, 2); Zhao, Kaixuan (1); Wu, Ailing (1); Sun, Jingwei (1)
Author affiliation: (1) Agricultural Engineering College, Henan University of Science and Technology, Luoyang; 471003, China; (2) Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province, Luoyang; 471003, China
Corresponding author: Jin, Xin(jx.771@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 33-41 and 118
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to promote the development of mechanization of vegetable production and increase the level of intelligent, an intelligent farming device for vegetables was designed based on mechanical design, pressure sensing, WiFi transmission, internet communications and Android mobile phone terminal control. The device included a farming mechanical component and a control system based on STM32 MCU, a mobile client software was developed based on Android, which can realize the remote viewing and manipulation functions. According to the farming instructions of the Android client, the end effector can select different functional heads to complete the corresponding farming action; through the capacitive soil moisture detection function head to monitor the soil moisture; positioning and quantitative sowing was performed through the sowing function head and gantry positioning; through the liquid material function head and PVDF pressure sensor installed at the liquid pipeline interface, to achieve liquid material delivery jam and flow monitoring, complete delivery of liquid material precision; the crop image information was acquired by CCD camera, and the weed identification algorithm was developed based on BP neural network to realize weed identification. The test results showed that the qualified rate of the plant spacing can reach 95.13%, and the rate of misuse was 4.86%; the liquid material delivery function was relatively stable and uniform, and the maximum error was no more than 5.4 g. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Android (operating system)
Controlled terms: Capacitive sensors? - ?CCD cameras? - ?Liquids? - ?Machinery? - ?Microcontrollers? - ?Moisture control? - ?Moisture determination? - ?Neural networks? - ?Soil moisture? - ?Vegetables
Uncontrolled terms: Android systems? - ?Farming device? - ?Internet communication? - ?Manipulation functions? - ?Mechanical components? - ?PVDF pressure sensor? - ?STM32 MCU? - ?Vegetable productions
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?714.2 Semiconductor Devices and Integrated Circuits
Semiconductor Devices and Integrated Circuits
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?732 Control Devices
Control Devices
? - ?821.4 Agricultural Products
Agricultural Products
? - ?944.2 Moisture Measurements
Moisture Measurements
Numerical data indexing: Mass 5.40e-03kg, Percentage 9.51e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.004
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
19. Optimization of Structure Parameters for Impulse Water Turbine of Hose Reel Irrigator
Accession number: 20184406012674
Title of translation: 卷盤式噴灌機(jī)沖擊式水渦輪結(jié)構(gòu)參數(shù)優(yōu)化
Authors: Li, Yaojun (1, 2); Chen, Weisheng (1); Yan, Haijun (1, 2); Zhang, Zhenzhou (3)
Author affiliation: (1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China; (2) Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing; 100083, China; (3) Center of Construction Management and Quality and Safety Supervision, Ministry of Water Resources, Beijing; 100038, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 138-144
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Optimization of the structure parameters for the impulse water turbine of a JP75 hose reel irrigator was presented with the aim to improve the hydraulic performance of the turbine. The SST k-ω turbulence model was adopted to analyze the flow field characteristics and the hydraulic performance of the water turbine. The reliability of the numerical method was verified by the available experimental data. On this basis, single factor experiments were conducted numerically to investigate the influence of the structure parameters on efficiency, driving torque and pressure drop of the turbine. Taking the impeller axial clearance width (axial clearance), the roundness radius of the outlet pipe entrance (roundness radius) and the spacing of the impeller axis and nozzle center line (center spacing) as the influence factors, three factors and three levels of quadratic regression orthogonal numerical testes were carried out by using Box-Benhnken central composite experimental design principles. Subsequently, the response surface methodology (RSM) was employed to analyze the influence of various factors on the efficiency, driving torque and pressure drop of the turbine under the design conditions. The results showed that the established quadratic pdynomial respense surface model is accurate enough to represent the corresponding relationship between the design variables and the response indicators. The spacing between impeller axis and nozzle center was the most important factor affecting the hydraulic performance of the water turbine. The optimal parameters combination of center spacing of 73 mm, axial clearance of 2 mm and roundness radius of 20 mm was obtained by using optimization module of Design-Expert data analysis software. The hydraulic performances of the optimized water turbine were predicted by using the proposed numerical simulation method and measured on a test rig. Compared with the original water turbine at the nominal operation point, the efficiency of the optimized turbine was increased by 17.6 percentage points, the torque was augmented by 13.2%, and the pressure drop was reduced by 29.3%. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Hydraulic motors
Controlled terms: Computational fluid dynamics? - ?Computer simulation? - ?Drops? - ?Efficiency? - ?Hose? - ?Hydraulic turbines? - ?Impellers? - ?Nozzle design? - ?Nozzles? - ?Numerical methods ? - ?Numerical models? - ?Pressure drop? - ?Reels? - ?Structural optimization? - ?Surface properties? - ?Turbulence models
Uncontrolled terms: Flow field characteristics? - ?Hose reels? - ?Hydraulic performance? - ?Numerical simulation method? - ?Optimization of structure parameters? - ?Response surface methodology? - ?Single-factor experiments? - ?Water turbines
Classification code: 408 Structural Design
Structural Design
? - ?601.2 Machine Components
Machine Components
? - ?617.1 Hydraulic Turbines
Hydraulic Turbines
? - ?619.1 Pipe, Piping and Pipelines
Pipe, Piping and Pipelines
? - ?632.2 Hydraulic Equipment and Machinery
Hydraulic Equipment and Machinery
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?723.5 Computer Applications
Computer Applications
? - ?913.1 Production Engineering
Production Engineering
? - ?921 Mathematics
Mathematics
? - ?951 Materials Science
Materials Science
Numerical data indexing: Percentage 1.32e+01%, Percentage 2.93e+01%, Size 2.00e-02m, Size 2.00e-03m, Size 7.30e-02m
DOI: 10.6041/j.issn.1000-1298.2018.08.016
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
20. Design and Performance Analysis of Cone-type Forest Soil Moisture Sensor Based on Standing Wave Principle
Accession number: 20184406012681
Title of translation: 基于駐波原理的錐式林區(qū)土壤含水率儀設(shè)計(jì)與性能分析
Authors: Tian, Hao (1, 2); Liu, Weiping (1, 2); Zhao, Yandong (1, 2)
Author affiliation: (1) School of Technology, Beijing Forestry University, Beijing; 100083, China; (2) Beijing Laboratory of Urban and Rural Ecological Environment, Beijing Forestry University, Beijing; 100083, China
Corresponding author: Zhao, Yandong(yandongzh@bjfu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 194-202
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The soil in forest area is more complicated than the soil in farmland, and the performance structure of real-time measuring instrument of water content is more demanding, in order to improve the measurement performance and usability of the existing soil moisture sensor in the forest area, on the basis of optimizing the sensor structure, the cone-type forest soil moisture sensor was designed based on standing wave principle. Cone angle was 30°, probe diameter was 20 mm and probe length was 150 mm. The transverse impact scope of the sensor was 10 cm and vertical scope was 18 cm, and the output linear fitting decision coefficient was over 0.96. Static and dynamic analysis showed that the measurement range of the sensor was from zero to saturated soil moisture content of clay soil, the measurement accuracy was 3%, the stability standard deviation was 0.49%, the overshoot was 0.48% and the transition time was 0.582 s. The linear fitting determination coefficient of the measurement results was above 0.97 by comparing with TDR (TRIME-HD2, Germany), the results of the two measurements were basically the same, and the results showed that the designed sensor met the actual application requirements. But the designed sensor was more suitable for measuring soil moisture in the forest area and more convenient to use, it provided an effective means for forest tending and forest ecological monitoring. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Moisture control
Controlled terms: Clay? - ?Design? - ?Elastic waves? - ?Forestry? - ?Moisture determination? - ?Moisture meters? - ?Probes? - ?Soil moisture? - ?Soil surveys? - ?Water content
Uncontrolled terms: Application requirements? - ?Determination coefficients? - ?Ecological monitoring? - ?Forest zones? - ?Measuring instruments? - ?Performance structures? - ?Standing wave? - ?Static and dynamic analysis
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?931.1 Mechanics
Mechanics
? - ?944.1 Moisture Measuring Instruments
Moisture Measuring Instruments
? - ?944.2 Moisture Measurements
Moisture Measurements
Numerical data indexing: Percentage 3.00e+00%, Percentage 4.80e-01%, Percentage 4.90e-01%, Size 1.00e-01m, Size 1.50e-01m, Size 1.80e-01m, Size 2.00e-02m, Time 5.82e-01s
DOI: 10.6041/j.issn.1000-1298.2018.08.023
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
21. Automatic Generation of Functional Schematic of Epicyclic Gear Trains for Transplanting Based on Code Value Matrix
Accession number: 20184406012669
Title of translation: 基于碼值矩陣的移栽用周轉(zhuǎn)輪系功能圖自動(dòng)生成
Authors: Xu, Yadan (1, 2); Sun, Liang (1, 3); Wu, Chuanyu (1, 3); Yu, Gaohong (1, 3); Zhang, Guofeng (1, 3); Fang, Zhi (1, 3)
Author affiliation: (1) College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou; 310018, China; (2) Hangzhou Vocational and Technical College, Hangzhou; 310018, China; (3) Zhejiang Province Key Laboratory of Transplanting Equipment and Technology, Hangzhou; 310018, China
Corresponding author: Sun, Liang(liangsun@zstu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 91-99
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: During the mechanisms synthesis of epicyclic gear trains for transplanting by graph theory, it appears that the feasible functional schematic would be omitted easily when conversion from bicolored graph to functional schematic with experience. The approach that automatic generation of functional schematic of epicyclic gear trains (FSE) based on code value matrix (CVM) was proposed. Systematic conversion from topological graph to FSE was achieved. According to the structural features of the FSE, the basic graphic symbols of the epicyclic gear trains were defined and encoded. On the basis of using adjacency matrix to describe the motion constraints between links, fundamental circuits were extracted, the description of the CVM were completed and three types of functional schematic of fundamental circuits (FSF) were obtained. Based on the random combination of all fundamental circuits, the FSF were matched by the principle of fundamental circuits connection, and atlas of the FSE was established systematically. Finally, the automatic generation of FSE was carried out on the design of corn pot seedling transplanting mechanism with epicyclic gear trains. The structure design, prototype mechanism and trajectory testing of the transplanting mechanism were completed. The simulation trajectory and the test trajectory were compared, which were basically the same. The result verified the feasibility of the automatic generation of functional schematic. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Epicyclic gears
Controlled terms: Automatic programming? - ?Codes (symbols)? - ?Graph theory? - ?Trajectories
Uncontrolled terms: Adjacency matrices? - ?Automatic Generation? - ?Epicyclic gear trains? - ?Fundamental circuits? - ?Seedling transplanting? - ?Structural feature? - ?Transplanting mechanisms? - ?Value matrixes
Classification code: 601.2 Machine Components
Machine Components
? - ?723.1 Computer Programming
Computer Programming
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI: 10.6041/j.issn.1000-1298.2018.08.011
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
22. Fitting and Analysis of Grain Filling of Summer Maize under Combination of Film Mulching and Nitrogen Fertilizer
Accession number: 20184406012687
Title of translation: 覆膜與施氮組合下夏玉米籽粒灌漿過程擬合分析
Authors: Fang, Heng (1); Li, Yuannong (1); Gu, Xiaobo (1); Yin, Minhua (1); Yang, Jinyu (1)
Author affiliation: (1) Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling; Shaanxi; 712100, China
Corresponding author: Li, Yuannong(liyuannong@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 245-252
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to reveal the effect law of different film mulching with nitrogen (N) fertilizer rate on the grain filling process of summer maize,the experiment of film mulching (plastic film,oxidation-biodegradable film,denoted as P and J) combined with urea (pure N 0 kg/hm2,90 kg/hm2,180 kg/hm2 and 270 kg/hm2,recorded as N0,N1,N2 and N3) was conducted to analyze the filling characteristic parameters and chlorophyll a/b content of summer maize. The results showed that within a certain range,with the increase of N application rate,the time to reach the maximum filling rate was delayed (maximum delay of 6.273 d),but the maximum filling rate and the average filling rate were increased,which were increased by 1.489 mg/d and 1.062 mg/d,respectively. Film mulching with N rate mainly prolonged the duration of fast-increase and slow-increase periods of filling,with 0.554~6.839 d and 1.627~12.355 d,respectively,and increased the average filling rate at fast-increase and slow-increase periods by 1.125 mg/d and 0.285 mg/d. P mainly extended duration of slight-increase,and improved the filling rate,while effect of J on extending the filling duration and improving the filling rate gradually appeared in fast-increase and slow-increase periods. Film mulching with N rate delayed the time of chlorophyll a/b to reach maximum (12~24 d),but prolonged the duration of photosynthetic activity,which was conducive to improve the quality of grain. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Filling
Controlled terms: Biodegradable polymers? - ?Chlorophyll? - ?Grain (agricultural product)? - ?Nitrogen fertilizers? - ?Urea
Uncontrolled terms: Film mulching? - ?Grain filling? - ?Nitrogen fertilization? - ?Richards models? - ?Summer maize
Classification code: 691.2 Materials Handling Methods
Materials Handling Methods
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?804.1 Organic Compounds
Organic Compounds
? - ?815.1 Polymeric Materials
Polymeric Materials
? - ?821.4 Agricultural Products
Agricultural Products
DOI: 10.6041/j.issn.1000-1298.2018.08.029
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
23. Project Optimization for Well-facilitied Farmland Construction Based on Coupling Coordination Degree
Accession number: 20184406012677
Title of translation: 基于耦合協(xié)調(diào)度模型的高標(biāo)準(zhǔn)農(nóng)田建設(shè)項(xiàng)目區(qū)優(yōu)選研究
Authors: Zhang, Hebing (1); Zhao, Suxia (1); Chen, Ningli (1); Zhang, Qiuxia (2)
Author affiliation: (1) College of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo; 454000, China; (2) College of Law and Public Management, North China University of Water Resources and Electric Power, Zhengzhou; 450046, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 161-168
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The well-facilitied farmland construction is important initiative to strengthen farmland protection and ensure food security. Along with growing prominence of contradiction between land and population and farmland protection, it is imminent to research well-facilitied farmland construction. The construction project area location is not scientific, and research on the construction project area location of well-facilitied farmland can resolve it. It can provide support of theory for well-facilitied farmland construction and information management. Taking Xinzheng City in Henan Province as an example, the suitability and spatial stability of the well-facilitied farmland construction were researched based on evaluation model of suitability and spatial stability of the well-facilitied farmland construction to improve scientificity of construction project area location of well-facilitied farmland. Then optimum model of construction project area was established based on coupling coordination degree to confirm difficulty of well-facilitied farmland construction. The agglomeration of difficulty level was explicitly by Hot-Spot analysis, and the construction project area was selected. The result showed that basically possesses of construction difficulty was the largest, the area of farmland was 33 731.84 hm2, the proportion was 62.27%. According to the difficulty of farmland construction, the well-facilitied farmland construction project area was selected, which contained five construction project areas. The Xincun Town, Chengguan Township, Guanyinsi Town, Lihe Town, Baqian Township and Xindian Town were involved. The well-facilitied farmland can be built with area of 3 455.87 hm2. It provided scientific basis for project location selection of well-facilitied farmland construction. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Farms
Controlled terms: Food supply? - ?Information management? - ?Location? - ?Petroleum reservoir evaluation
Uncontrolled terms: Area optimization? - ?Construction projects? - ?Coordination degree? - ?Evaluation modeling? - ?Farmland protections? - ?Hot spot? - ?Project optimization? - ?Spatial stability
Classification code: 512.1.2 Petroleum Deposits : Development Operations
Petroleum Deposits : Development Operations
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?822.3 Food Products
Food Products
Numerical data indexing: Percentage 6.23e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.019
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
24. Blueberry Shelf Life Prediction Method Based on Sensor Information Stored Gas
Accession number: 20184406012694
Title of translation: 基于氣體傳感信息的藍(lán)莓貯藏貨架期預(yù)測方法
Authors: Fu, Zetian (1, 2); Gao, Qianzhong (3); Li, Xinwu (1); Zhang, Xu (3); Zhang, Xiaoshuan (1, 2)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing; 100083, China; (3) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Zhang, Xiaoshuan(zhxshuan@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 308-315
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Given the importance of blueberry shelf life in ensuring the quality of blueberries during storage, a blueberry shelf life prediction method was proposed from the perspective of gas sensing information. Three kinds of gas content (oxygen, carbon dioxide and ethylene) and five kinds of physical and chemical indexes for blueberry (rate of corruption, hardness, pH value, soluble solids and weight loss rate) in storage environment of 0, 5 and 22 were monitored, the correlation between gas content and physical and chemical indexes were analyzed, and the shelf life prediction model of blueberry was established by using the BP neural network from the perspective of gas. The results showed that the quality of blueberry was affected by the storage temperature, and there was a clear correlation between the change of gas and blueberry quality. Blueberry shelf life prediction model using the BP neural network had good predictive results. Among them, the prediction error was 0.091~0.191 d at 0, which was 0.069~0.302 d at 5 and 0.094~0.338 d at 22. Predicting the shelf life of blueberries by using gas sensing information had the advantages of simple operation and low cost, which was a useful exploration for the shelf life prediction of blueberries. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 33
Main heading: Petroleum prospecting
Controlled terms: Carbon dioxide? - ?Chemical detection? - ?Ethylene? - ?Forecasting? - ?Gas detectors? - ?Gases? - ?Neural networks
Uncontrolled terms: Blueberry? - ?BP neural networks? - ?Gas sensing? - ?Physical and chemical indexes? - ?Shelf-life prediction
Classification code: 512.1.2 Petroleum Deposits : Development Operations
Petroleum Deposits : Development Operations
? - ?801 Chemistry
Chemistry
? - ?804.1 Organic Compounds
Organic Compounds
? - ?804.2 Inorganic Compounds
Inorganic Compounds
? - ?914.1 Accidents and Accident Prevention
Accidents and Accident Prevention
DOI: 10.6041/j.issn.1000-1298.2018.08.036
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
25. Effect of Blade Numbers of Francis Runners on Fish Strike Mortality
Accession number: 20184406012676
Title of translation: 混流式轉(zhuǎn)輪葉片數(shù)對(duì)魚類撞擊死亡率的影響
Authors: Zhu, Guojun (1); Ji, Longjuan (1); Feng, Jianjun (1); Luo, Xingqi (1)
Author affiliation: (1) Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an; 710048, China
Corresponding author: Feng, Jianjun(jianjunfeng@xaut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 153-160
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The fish in the dam reservoir will die from the strike of rotating runner blade with high speed when passing the turbine flow passage. In order to improve the survival rate of the fish, a method for evaluating the strike mortality of fish in Francis turbine runner was presented. This method contained three steps. Firstly, the CFD method was adopted to obtain the velocity field inside the Francis turbine runner. Secondly, based on the blade-strike model and the absolute velocity distribution on the inlet of runner, the probability of fish struck the runner blade was calculated. Finally, according to the fitting model of radial basis function (RBF) neural network, the lethality rate of fish owing to blade strike was obtained, and then the strike mortality of fish passed through the runner could be calculated. Based on this method, the strike mortality of fish of the initial and the optimized runner at different operation points were calculated. The influence of the turbine discharge and blade numbers on the mortality rate of fish was researched. From the result, it can be concluded that the mortality rate of fish passed through the runner was positively correlated with the discharge and the number of runner blades under the rated head. For the initial runner, the strike mortality rate of fish reached 16.85% at rated point. Compared with the initial runner, the strike mortality rate of fish at rated point was reduced by 2.93 and 5.3 percentage points, which meant these two optimized runner had better ecological performance of fish than the initial runner. According to the comparison of ecological performance and hydraulic efficiency, the optimized runner with 13 blades was chosen as the final scheme. The research methods and contents can provide valuable reference for the fish friendly optimization of Francis turbine. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Turbomachine blades
Controlled terms: Computational fluid dynamics? - ?Computer simulation? - ?Ecology? - ?Fish? - ?Francis turbines? - ?Hydraulic motors? - ?Hydraulic turbines? - ?Population statistics? - ?Probability distributions? - ?Radial basis function networks ? - ?Reservoirs (water)? - ?Turbine components? - ?Velocity? - ?Well pumps
Uncontrolled terms: Dam reservoirs? - ?Ecological performance? - ?Francis runner? - ?Francis turbine runner? - ?Hydraulic efficiency? - ?Operation point? - ?Percentage points? - ?Radial basis function neural networks
Classification code: 441.2 Reservoirs
Reservoirs
? - ?454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?617 Turbines and Steam Turbines
Turbines and Steam Turbines
? - ?617.1 Hydraulic Turbines
Hydraulic Turbines
? - ?618.2 Pumps
Pumps
? - ?632.2 Hydraulic Equipment and Machinery
Hydraulic Equipment and Machinery
? - ?723.5 Computer Applications
Computer Applications
? - ?922.1 Probability Theory
Probability Theory
Numerical data indexing: Percentage 1.69e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.018
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
26. Quantification of Soil Wetted Volume Development under Surface Drip Irrigation
Accession number: 20184406012691
Title of translation: 地表滴灌條件下土壤濕潤體運(yùn)移量化表征
Authors: Chen, Shuai (1); Mao, Xiaomin (1)
Author affiliation: (1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Mao, Xiaomin(maoxiaomin@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 285-292
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Understanding the behavior of soil wetted volume evolution in drip irrigation is essential for improving agricultural water use efficiency and realizing precision irrigation. Based on the Richard equation for water movement in unsaturated soil, the HYDRUS-2D/3D model was used to numerically simulate the soil wetting pattern in 11 kinds of typical soils (USST). Results showed that soil water content increment in wetted volume was in a positive correlation with the dripper discharge rate, and in a negative correlation with the saturated soil hydraulic conductivity. The advancement of vertical wetting front can be quantified by the selected influencing factors, i.e., the dripper discharge, saturated hydraulic conductivity and irrigation time. The horizontal wetting front can be expressed by the dripper discharge, soil water content increment in wetted volume, vertical wetting front and irrigation time. Then two empirical equations were formulated to describe the development of soil wetted volume under different dripper discharge, saturated hydraulic conductivity and irrigation time. By comparing with the numerical simulation results and the experimental data from literatures, it showed that the empirical formulas were reliable for predicting the migration of soil water in drip irrigation for different kinds of soil textures and managing to be a convenient and practical tool for the design of surface drip irrigation in agricultural activity. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Wetting
Controlled terms: Hydraulic conductivity? - ?Irrigation? - ?Soil moisture
Uncontrolled terms: Agricultural activities? - ?Agricultural water use? - ?Quantification? - ?Saturated hydraulic conductivity? - ?Saturated soil hydraulic conductivities? - ?Soil textures? - ?Surface drip irrigations? - ?Wetted volume development
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?632.1 Hydraulics
Hydraulics
? - ?821.3 Agricultural Methods
Agricultural Methods
DOI: 10.6041/j.issn.1000-1298.2018.08.033
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
27. Influence of Wing Tip Vortex on Drift of Single Rotor Plant Protection Unmanned Aerial Vehicle
Accession number: 20184406012673
Title of translation: 單旋翼植保無人機(jī)翼尖渦流對(duì)霧滴飄移的影響
Authors: Wen, Sheng (1, 2); Han, Jie (2, 3); Lan, Yubin (2, 3); Yin, Xuanchun (2, 3); Lu, Yuhua (1, 2)
Author affiliation: (1) Engineering Fundamental Teaching and Training Center, South China Agricultural University, Guangzhou; 510642, China; (2) National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou; 510642, China; (3) College of Engineering, South China Agricultural University, Guangzhou; 510642, China
Corresponding author: Lan, Yubin(ylan@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 127-137 and 160
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Plant protection drone has great application prospects in agricultural production due to its low working height, flexible operation, good adaptability to terrain, slight environmental pollution and high efficiency in pest control. However, it could cause secondary disasters with droplets drift due to wingtip vortices. To investigate the effect of wing tip vortex flow of a single-rotor unmanned aerial vehicle on droplet drift, the flow field under a single-rotor unmanned aerial vehicle (UAV) was simulated numerically based on an adaptive thinned physical model of the lattice-Boltzman (LBM) method. The drift characteristics at different flight speeds of the wingtip vortex were examined for various nozzle positions and vertical distances between different spray booms. The Lagrange discrete particle tracking method was applied to capture accurately the trajectories of droplets with different particle diameters. Spray tests were conducted to verify the accuracy of the numerical simulation. It was shown that as the UAV flight speed was greater than 3 m/s, a spiral tail vortex appeared at the rear of the fuselage. The range of the tail vortex behind the fuselage became longer as the flight speed or flight altitude got higher. And 38% of the droplets was drifted by the spiral tail vortex at the flight speed of 5 m/s and the flight height of 3 m, in which 80% of the drifted droplets was smaller than 100 μm. The distance between the sprayer and the main rotor had little effect on the drop drift caused by the wingtip vortex. While the nozzle was closer to the edge of the main rotor, the droplets can be more easily sucked by the wingtip vortex. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Vortex flow
Controlled terms: Aerodynamics? - ?Agriculture? - ?Antennas? - ?Computer simulation? - ?Drops? - ?Fuselages? - ?Numerical models? - ?Pollution control? - ?Spray nozzles? - ?Unmanned aerial vehicles (UAV) ? - ?Wakes? - ?Wind tunnels
Uncontrolled terms: Agricultural productions? - ?Application prospect? - ?Environmental pollutions? - ?Particle diameters? - ?Particle-tracking method? - ?Plant protection? - ?Secondary disasters? - ?Wingtip vortex
Classification code: 631.1 Fluid Flow, General
Fluid Flow, General
? - ?651.1 Aerodynamics, General
Aerodynamics, General
? - ?651.2 Wind Tunnels
Wind Tunnels
? - ?652.1 Aircraft, General
Aircraft, General
? - ?723.5 Computer Applications
Computer Applications
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?921 Mathematics
Mathematics
Numerical data indexing: Percentage 3.80e+01%, Percentage 8.00e+01%, Size 1.00e-04m, Size 3.00e+00m, Velocity 3.00e+00m/s, Velocity 5.00e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.015
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
28. Validation and in-situ Parameter Estimation for Model of Water Transport and Energy Exchange in Root Zone of Winter Wheat in Winter
Accession number: 20184406012684
Title of translation: 越冬期麥田根區(qū)水熱耦合模型參數(shù)原位估算與檢驗(yàn)
Authors: Cheng, Qiang (1); Xu, Qiang (1); Chen, Chao (1); Xue, Xuzhang (2); Wang, Zhongyi (1); Sun, Yurui (1)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Beijing Research Centre of Intelligent Equipment for Agriculture, Beijing; 100097, China
Corresponding author: Sun, Yurui(pal@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 219-227
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Sufficient water storage in root zone during winter time not only benefits crop growth in next spring, but also potentially increases the yield. Water movement in root zone was often simulated by using the coupled water and heat transport (CWHT) model during soil freezing-thawing process and influenced by multiple factors such as boundary conditions, parameters determination method, and so on. An improved method based on in-situ measured data was proposed to optimally estimate the parameters in the CWHT model. The applicability of this method was validated as well. The hydraulic parameters in the model were estimated in-situ by fitting soil freezing-thawing characteristic curve (SFC), which showed the relationship between the unfrozen soil water content (USWC) and soil temperature (ST). Then, the effect of surface evaporation (Es) on prediction accuracy in winter was evaluated. The field experiment was conducted over two winters (2011-2012 and 2012-2013) in an experimental farm at Changping County, Beijing, China. The USWC, ST and Es were monitored with dielectric tube sensors, temperature sensors and lysimeter, respectively. The data obtained in 2011-2012 were used to fit SFC to optimize the hydraulic parameters, whereas those in 2012-2013 were used to verify the model. The results showed that the model simulations were agreed well with the field measurements. When considering the effects of Es on USWC and ST, the root mean square errors (RMSE) of USWC and ST predictions in 2012-2013 were 0.046 m3/m3 and 1.883 at 10 cm and 0.071 m3/m3 and 2.347 at 20 cm, respectively. In contrast to the condition without Es, the RMSE for USWC and ST predictions in 2012-2013 were 0.059 m3/m3 and 2.149 at 10 cm and 0.081 m3/m3 and 2.666 at 20 cm, respectively. Thus, the improved method of parameters determination based on in-situ measured data can ensure the prediction accuracy of the CWHT model. In addition, the accuracy could be further improved with considering the effects of surface evaporation and the effect of surface evaporation on USWC and ST was gradually decreased as the depth increased. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Parameter estimation
Controlled terms: Computer simulation? - ?Crops? - ?Curve fitting? - ?Digital storage? - ?Evaporation? - ?Forecasting? - ?Freezing? - ?Mean square error? - ?Soil mechanics? - ?Soil moisture ? - ?Thawing
Uncontrolled terms: Characteristic curve? - ?In-situ measured data? - ?Parameters determination? - ?Parameters determination methods? - ?Root mean square errors? - ?Roots zone of wheat? - ?Soil surfaces? - ?Water transport
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?722.1 Data Storage, Equipment and Techniques
Data Storage, Equipment and Techniques
? - ?723.5 Computer Applications
Computer Applications
? - ?802.3 Chemical Operations
Chemical Operations
? - ?821.4 Agricultural Products
Agricultural Products
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Size 1.00e-01m, Size 2.00e-01m
DOI: 10.6041/j.issn.1000-1298.2018.08.026
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
29. Effects of Film Mulching and Irrigation Amount on Farmland Water-Heat Dynamics and Growth of Seed-maize
Accession number: 20184406012690
Title of translation: 覆膜和灌水量對(duì)農(nóng)田水熱動(dòng)態(tài)和制種玉米生長的影響
Authors: Zhao, Yin (1); Mao, Xiaomin (1); Duan, Meng (1)
Author affiliation: (1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Mao, Xiaomin(maoxiaomin@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 275-284
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Film mulching and water-saving irrigation are the main measures to cope with water resources shortage and increase crop water productivity in the arid region of Northwest China. In order to explore the comprehensive influence of film mulching and irrigation system on farmland water and heat condition and seed-maize growth and reveal the variation of farmland water consumption and water use efficiency, field experiments of seed-maize were conducted at Shiyanghe Experimental Station for Water-saving in Agriculture and Ecology of China Agricultural University in 2017. The experiments involved ten treatments, i.e., two levels of film mulching, full-mulching(M1)and non-mulching(M0)and five irrigation amount levels of drip irrigation, i.e., W1, W2, W3, W4 and W5, respectively 100%, 85%, 70%, 55% and 40% of the local traditional irrigation quota. Results showed that compared with non-mulching, film mulching can reduce soil evaporation and increase soil temperature in early stage, which resulted in higher growth rate of plant height and leaf area index, and reached their maximum values by 7~10 d in advance, increased the yield of seed-maize by 6.5%~44.6% and the water use efficiency by 16.9%~50.4% under the same irrigation conditions. But film mulching can block rainfall infiltration. For example, when the rainfall was 32.4 mm, the percentage of rainfall infiltration into the soil was 22.4% less than that of non-mulched treatment. Under the same film mulching condition, the consumption of soil water storage was increased with the decrease of irrigation amount, thus the soil water storage was increased with the increase of irrigation amount. The higher irrigation amount was, the higher the plant height, the LAI and the total dry biomass were, while the lower the water use efficiency was. The yield of W1 was the highest and that of W3 was the second under the condition of film mulching, and there was no significant difference between them. While for the water use efficiency, W5 was the highest and W3 was the second. The M1W3 treatment can keep higher maize yield with water use efficiency enhanced by 17.6% compared with that of M1W1. In conclusion, although field mulching may reduce the infiltration of rainfall, it can advance the growth period and reduce soil evaporation, which enhanced yield and saved water in the production of local seed-maize to some extent. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 46
Main heading: Infiltration
Controlled terms: Ecology? - ?Efficiency? - ?Evaporation? - ?Farms? - ?Film growth? - ?Growth rate? - ?Irrigation? - ?Rain? - ?Seed? - ?Soil moisture ? - ?Water conservation? - ?Water management? - ?Water supply
Uncontrolled terms: Crop water productivity? - ?Drip irrigation? - ?Experimental stations? - ?Film mulching? - ?Rainfall infiltration? - ?Traditional irrigation? - ?Water use efficiency? - ?Water-saving irrigation
Classification code: 443.3 Precipitation
Precipitation
? - ?444 Water Resources
Water Resources
? - ?446.1 Water Supply Systems
Water Supply Systems
? - ?454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?802.3 Chemical Operations
Chemical Operations
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Percentage 1.00e+02%, Percentage 1.76e+01%, Percentage 2.24e+01%, Percentage 4.00e+01%, Percentage 5.50e+01%, Percentage 7.00e+01%, Percentage 8.50e+01%, Size 3.24e-02m
DOI: 10.6041/j.issn.1000-1298.2018.08.032
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
30. Water Use Efficiency of Maize in Black Soil of Cold Regions Based on Stable Carbon Isotopes
Accession number: 20184406012689
Title of translation: 基于穩(wěn)定碳同位素的寒地黑土區(qū)玉米水分利用效率研究
Authors: Zhang, Zhongxue (1, 2); Chen, Shuaihong (1, 2); Chen, Peng (1, 2); Zheng, Ennan (1, 2); Liu, Ming (1, 2)
Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 265-274
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to further investigate the influence of different irrigation systems on water use efficiency of maize in black soil of the cold regions, based on the experimental data of maize fields, the patterns of water consumption and water use efficiency were analyzed at different scales, in order to find a irrigation scheme that meets the requirement of water saving and high yield of maize in Northeast China; the relationship between stable carbon isotope resolution (Δ13C) and water use efficiency (WUE) of maize leaves and grains was analyzed, the indicated effect of stable carbon isotope discrimination of maize on water use efficiency of different levels of crops was validated. The results showed that the irrigation quota was 800 m3/hm2 during the whole growth period, and the corn yield was up to 14 920.62 kg/hm2 at four times, but the yield level of water use efficiency (WUEy) was low; the whole growth period irrigation quota was 600 m3/hm2, four times irrigation maize WUEy was up to 3.74 kg/m3, but yield was low. Considering yield and water use efficiency, the conclusion was drawn that the irrigation scheme that met the requirement of high water saving and yield of maize in this area was irrigation quota of 800 m3/hm2 and irrigation three times (at seedling stage, jointing stage and tasselling stage) in the whole growth period. At this situation, the WUEy of maize was 3.65 kg/m3, and there was no significant decline in output. The stable carbon isotope discrimination of maize leaves at elongation stage (ΔLB), leaf carbon isotope discrimination at fruit maturation stage (ΔLC) and fruit carbon isotope discrimination (ΔF) were between 0.451% and 0.542%, 0.505% and 0.598%, 0.496% and 0.526%, respectively, ΔL and ΔF were negatively correlated with WUEi, WUEn and WUEy, respectively. Furthermore, ΔL showed a better indicating capacity on WUEn than on WUEi under different water treatments, the effect of ΔF on WUEy was better than the effect of ΔL on WUEy. Thus ΔL and ΔF could be used as important evaluation indexes of WUEn and WUEy in crop leaves respectively, the results can provide theoretical support and data reference for maize production in Northeast China. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 39
Main heading: Water supply
Controlled terms: Carbon? - ?Crops? - ?Efficiency? - ?Fruits? - ?Irrigation? - ?Isotopes? - ?Plants (botany)? - ?Water conservation
Uncontrolled terms: Discrimination? - ?Irrigation systems? - ?Maize? - ?Stable carbon isotopes? - ?Water use efficiency
Classification code: 444 Water Resources
Water Resources
? - ?446.1 Water Supply Systems
Water Supply Systems
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Mass_Density 3.65e+00kg/m3, Mass_Density 3.74e+00kg/m3, Percentage 4.51e-01% to 5.42e-01%, Percentage 4.96e-01%, Percentage 5.05e-01%, Percentage 5.26e-01%, Percentage 5.98e-01%
DOI: 10.6041/j.issn.1000-1298.2018.08.031
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
31. Evaluation Model for Natural Grassland Utilization Based on Spatio-temporal Trajectory of Grazing Livestock
Accession number: 20184406012679
Title of translation: 基于放牧?xí)r空軌跡的天然草地利用評(píng)估模型
Authors: Wang, Chuanjian (1, 2); Jiang, Honghong (1, 2); Lu, Weihua (3); Zhang, Ya (1, 2); Sun, Shize (1, 2); Li, Dong (1, 2)
Author affiliation: (1) College of Information Science and Technology, Shihezi University, Shihezi; 832000, China; (2) Geospatial Information Engineering Research Center, Xinjiang Production and Construction Corps, Shihezi; 832000, China; (3) College of Animal Science and Technology, Shihezi University, Shihezi; 832003, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 181-186
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Grasslands are important ecological barriers and livestock production base. The study on the spatial distribution of grassland utilization and the effective use of grassland was of great significance for the rational planning of grassland and the sustainable utilization of grassland. To obtain the grassland utilization on a large scale, a natural grassland utilization evaluation model based on the temporal and spatial trajectories of grazing was proposed. In order to quantify grazing pressure, a feeding intensities (FI) map was created by using a grid cell method with the tracking data recorded by the global positioning system (GPS), because GPS can collect information in real time. In addition, feeding intensities were divided by fuzzy mathematics. So far, there was no standard for dividing the use of grassland, and different areas and types of grassland utilization cannot find the exact classification criteria. If it was strictly classified according to the classification interval, it would cause the boundary too rigid between the intervals. Therefore, fuzzy mathematics was used to evaluate grassland utilization. A simple membership function was established based on the lower semi-trapezoid distribution function, the semi-trapezoid distribution function and the middle symmetrical distribution in fuzzy mathematics, and the maximum membership degree principle were applied to determine grassland utilization. Therefore, the grassland utilization and the effective utilization area of grassland were obtained. Taking pasture of the 151 regiments of the Eighth Agricultural Division of Xinjiang and Construction Corps in 2015 and 2016 as an example, the grassland utilization was estimated, and the precision of the model was 86.67%. The result showed that the evaluation model could reflect the utilization of grassland better. More than 45% of the grassland was not used, and only about 3.7% of the grassland was used moderately. In the used meadows, in July 2015, the poor utilization of grassland accounted for 76.53%, and the good utilization of grassland only accounted for 4.77%. In July 2016, the poor utilization of grassland was 48.84%, and the good utilization of grassland only accounted for 11.92%. The model provided a scientific basis for the relevant departments on monitoring the utilization of grassland. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Vegetation
Controlled terms: Agriculture? - ?Distribution functions? - ?Function evaluation? - ?Global positioning system? - ?Membership functions? - ?Trajectories? - ?Waste utilization
Uncontrolled terms: Classification criterion? - ?Fuzzy recognition? - ?Grassland? - ?Grazing intensity? - ?Quantitative? - ?Spatio-temporal trajectories? - ?Sustainable utilization? - ?Temporal and spatial
Classification code: 821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?921 Mathematics
Mathematics
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.1 Probability Theory
Probability Theory
Numerical data indexing: Percentage 1.19e+01%, Percentage 3.70e+00%, Percentage 4.50e+01%, Percentage 4.77e+00%, Percentage 4.88e+01%, Percentage 7.65e+01%, Percentage 8.67e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.021
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
32. Design of Wireless Network for Tractors Based on Teleoperation System
Accession number: 20184406012706
Title of translation: 基于無線網(wǎng)絡(luò)的拖拉機(jī)遙操作系統(tǒng)設(shè)計(jì)與試驗(yàn)
Authors: Xue, Jinlin (1); Wei, Yaoyao (1); Yan, Jia (1); Dong, Shuxian (1); Zhang, Lingfeng (1)
Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 395-402
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To reduce the labor intensity and improve the working conditions for drivers, a teleoperation system was developed for tractors. First of all, a general design was expanded according to requirements that the teleoperation system should be achieved. Through wireless network communication, the tractor’s working environment can be transmitted with video to a teleoperation terminal where an operator was located, and the operator can send commands to drive tractor. Then a MY 250 tractor was refitted for remote steering, clutch, braking, throttle, shutdown and ignition by installing actuators such as motors and electric putters. In addition, a teleoperation control system was designed, including a user interface and an on-board control system. Finally, tests were carried out to detect the system performances about communication, action and driving. Results demonstrated that the average communication delay was 0.074 ms, and the maximum video delay was 373 ms for the teleoperation system, the maximum control error was 2.21% for all actuators, and the maximum absolute error was no more than 208.5 mm when the tractor was driven along a straight line at speed of 2.08 km/h by the teleoperation system, with a maximum root mean square (RMS) error of 85.5 mm. This research can provide reference and solution for the development of agricultural machinery with teleoperation technology. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: User interfaces
Controlled terms: Actuators? - ?Control systems? - ?Electric ignition? - ?Errors? - ?Remote control? - ?Tractors (truck)? - ?Wireless networks
Uncontrolled terms: Communication delays? - ?Labor intensity? - ?Maximum absolute error? - ?Remote steering? - ?Root-mean-square errors? - ?Teleoperation systems? - ?Wireless network communication? - ?Working environment
Classification code: 521.1 Fuel Combustion
Fuel Combustion
? - ?663.1 Heavy Duty Motor Vehicles
Heavy Duty Motor Vehicles
? - ?722.2 Computer Peripheral Equipment
Computer Peripheral Equipment
? - ?722.3 Data Communication, Equipment and Techniques
Data Communication, Equipment and Techniques
? - ?731.1 Control Systems
Control Systems
? - ?732.1 Control Equipment
Control Equipment
Numerical data indexing: Percentage 2.21e+00%, Size 2.08e-01m, Size 8.55e-02m, Time 3.73e-01s, Time 7.40e-05s, Velocity 5.78e-01m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.048
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
33. Inversion and Analysis of Maize Biomass in Coal Mining Subsidence Area Based on UAV Images
Accession number: 20184406012678
Title of translation: 基于無人機(jī)影像的采煤沉陷區(qū)玉米生物量反演與分析
Authors: Xiao, Wu (1, 2); Chen, Jiale (1); Da, Hongzhi (1); Ren, He (1); Zhang, Jianyong (1); Zhang, Lei (1)
Author affiliation: (1) Institute of Land Reclamation and Ecological Rehabilitation, China University of Mining and Technology, Beijing; 100083, China; (2) School of Public Affairs, Zhejiang University, Hangzhou; 310058, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 169-180
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The surface arable land damage and destruction of the original ecosystem caused by the influence of coal mining disturbance are the major ecological disasters in the high underground water mining area. Identifying an arable-damaged area and obtaining its spatial distribution are important for ecological disaster monitoring. The influence of crop waterlogging caused by mining subsidence in high underground water mining areas was taken as an example, and based on the UAV multi-spectral images, the red band was introduced on the basis of traditional vegetation index to expand, which allowed to select the best 22 VI. Univariate regression, multivariable linear regression (MLR) based on the principle of least square method and back propagation neural networks (BPNN) were built accordingly by using the 22 VI along with field measurements of biomass data under the empirical modeling method. There were three indices should be taken into account to determine the optimal model, which were coefficient of determination (R2), root mean square error (RMSE) and estimation accuracy (EA). The spatial distribution inversion and analysis of maize biomass were undertaken in the study area by using the selected optimal model. It was concluded that the selected vegetation index was significantly related to biomass. And the highest estimation accuracy was obtained by using BP model. The value of R2 was 0.83 accordingly, which was generally increased by 0.10~ 0.17. The value of predicted root mean square error (RMSE) was 178.72 g/m2, which was generally reduced by 29.65~60.23 g/m2. The estimation accuracy (EA) could eventually reach 79.4%, which was increased by 3.3% ~ 7.1%. It can be concluded that the red edge band was more suited to the estimation of crop biomass in the mining subsidence area. Furthermore, the accuracy rate of the inversion model under the influence of coal mining subsidence could be increased dramatically by introducing red edge band to the construction of biomass inversion model. The research showed that the maize biomass in the coal mining subsidence basin was concentrated between an interval of 592 ~ 1 050 g/m2, which accounted for 74.4% of the total area. There was 14.1% of the crop acreage which represented those above ground biomass below 352 g/m2. The overall growth of maize was severely affected by coal mining. There was a trend of maize biomass which was generally decreased from the basin margin to its centre. The research result can be used as an indicator to monitor and evaluate damaged ground in high underground water mining area, and it can also provide fundamental data and theory support for land rehabilitation and ecological restoration. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Ecology
Controlled terms: Backpropagation? - ?Biomass? - ?Coal? - ?Coal mines? - ?Coal reclamation? - ?Crops? - ?Cutting machines (mining)? - ?Disasters? - ?Groundwater? - ?Land reclamation ? - ?Land use? - ?Least squares approximations? - ?Mean square error? - ?Neural networks? - ?Spatial distribution? - ?Spectroscopy? - ?Subsidence? - ?Unmanned aerial vehicles (UAV)? - ?Vegetation
Uncontrolled terms: Back-propagation neural networks? - ?Coal mining subsidences? - ?Coefficient of determination? - ?Ground water table? - ?High underground water mining area? - ?Mining subsidence areas? - ?Multi-variable linear regression? - ?Vegetation index
Classification code: 403 Urban and Regional Planning and Development
Urban and Regional Planning and Development
? - ?442.2 Land Reclamation
Land Reclamation
? - ?444.2 Groundwater
Groundwater
? - ?454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?502.2 Mine and Quarry Equipment
Mine and Quarry Equipment
? - ?503.1 Coal Mines
Coal Mines
? - ?524 Solid Fuels
Solid Fuels
? - ?652.1 Aircraft, General
Aircraft, General
? - ?723.4 Artificial Intelligence
Artificial Intelligence
? - ?821.4 Agricultural Products
Agricultural Products
? - ?921 Mathematics
Mathematics
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Percentage 1.41e+01%, Percentage 7.10e+00%, Percentage 7.44e+01%, Percentage 7.94e+01%, Surface_Density 1.79e-01kg/m2, Surface_Density 2.96e-02kg/m2 to 6.02e-02kg/m2, Surface_Density 3.52e-01kg/m2, Surface_Density 5.92e-01kg/m2 to 1.05e+00kg/m2
DOI: 10.6041/j.issn.1000-1298.2018.08.020
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
34. Control System of Motor-driving Maize Precision Planter Based on GPS Speed Measurement
Accession number: 20184406012663
Title of translation: 基于GPS測速的電驅(qū)式玉米精量播種機(jī)控制系統(tǒng)
Authors: Ding, Youqiang (1); Yang, Li (1); Zhang, Dongxing (1); Cui, Tao (1); He, Xiantao (1); Zhong, Xiangjun (1)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Yang, Li(yl_hb68@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 42-49
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Traditional precision maize planters mostly use land wheel to drive or measure speed, the phenomenon of land wheel slippage and chain hopping is easy to occur under high-speed operation conditions, so it’s difficult to ensure the seeding quality. In allusion to the problems mentioned above, a control system of motor-driving maize precision planter based on GPS speed measurement was proposed. Different from traditional maize precision planters’ control system, in the new control system, STM32 was utilized as the MCU, Android-powered devices were adopted to set seeding parameters, GPS receivers were used to collect the tractor’s working speed, the rotational speed of motor would vary with the tractor’s working speed in real time, and then the sowing axis’ rotational speed would match the tractor’s working speed dynamically. To check up the performance of the new control system, the comparison test was carried out at three plant spacings of 18 cm, 22 cm and 25 cm, and five speeds of 4 km/h, 6 km/h, 8 km/h, 10 km/h and 12 km/h. The field experiment results demonstrated that distance variation coefficient of the control system based on GPS was less than control system based on encoder under the same experimental conditions, sowing qualified index and distance variation coefficient of the control system based on encoder was more predominantly affected by working speed than control system based on GPS. Under different plant spacing conditions, the average sowing qualified index of the control system based on GPS was 5.39 percentage points lower than that of the control system based on encoder while working speed was 4 km/h. Increased working speed to 6~10 km/h, the GPS mode was 7.96 percentage points higher than that of encoder mode. When the working speed was risen to 12 km/h, the GPS mode was 14.32 percentage points higher than that of encoder mode. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Speed
Controlled terms: Control systems? - ?Global positioning system? - ?Seed? - ?Signal encoding? - ?Tractors (agricultural)? - ?Tractors (truck)? - ?Wheels
Uncontrolled terms: Experimental conditions? - ?High-speed operation? - ?Motor driving? - ?Percentage points? - ?Precision maize planter? - ?Seeding qualities? - ?Speed measurement? - ?Variation coefficient
Classification code: 601.2 Machine Components
Machine Components
? - ?663.1 Heavy Duty Motor Vehicles
Heavy Duty Motor Vehicles
? - ?716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
? - ?731.1 Control Systems
Control Systems
? - ?821.4 Agricultural Products
Agricultural Products
Numerical data indexing: Size 1.80e-01m, Size 2.20e-01m, Size 2.50e-01m, Velocity 1.11e+00m/s, Velocity 1.67e+00m/s, Velocity 1.67e+00m/s to 2.78e+00m/s, Velocity 2.22e+00m/s, Velocity 2.78e+00m/s, Velocity 3.33e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.08.005
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
35. Design and Experiment of Soil Disinfection Steam Generator Based on Pulse Combustion Technology
Accession number: 20184406012693
Title of translation: 基于脈動(dòng)燃燒技術(shù)的土壤消毒蒸汽發(fā)生裝置設(shè)計(jì)與試驗(yàn)
Authors: Pan, Sipu (1); Zhou, Hongping (1); Jiang, Xuesong (1); Chen, Qing (1); Li, Pingping (2)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing; 210037, China; (2) College of Biology and Environment, Nanjing Forestry University, Nanjing; 210037, China
Corresponding author: Zhou, Hongping(hpzhou@njfu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 301-307
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Protected horticulture industry has developed rapidly in China in recent years. With the continuous development, a series of problems have arisen, which resulted in a huge loss in protected horticulture industry. For example, simplifying varieties, high multiple crop index and fertilizer overspending can lead to terrible results on the soil, like salts accumulation, disorder of soil physical and chemical properties, soil-born disease and insects, autotoxicity of crops, and so on, which called continuous cropping obstacle. The preferred manner to deal with continuous cropping obstacle is soil steam disinfection because of its great advantages compared with chemical disinfection. For example, with high temperature steam as disinfection medium, it can ensure that no pesticide residue on food. Besides, it can also effectively regulate soil physical and chemical properties, improve soil respiration ability and prevent soil hardening. To solve the problem of steam supply in soil steam disinfestation, a steam generator based on pulse combustion technology was designed. The power of 107.12 kW was needed when the yield of the steam generator was 130 kg/h with the pressure of 0.6 MPa. It was mainly composed of two parts: the pulse combustion engine and the pot body. The steam generator utilized four pulse combustion engines which worked in parallel, and the main parts were immersed in the water in the pot body. Each pulse combustion utilized two carburetors for oil and air supply, which were connected to combustion chamber with “Y”-shaped throat. Three helical tubes worked in parallel as tailpipe. Fins were adhered to the inner wall of decoupling chamber, and angel steel was adhered to the outer wall. Experiment results showed that the pulse combustion engine had great start-up performance and working stability both in the air and water. The working frequency was tested both in the air and water. The working frequency of pulse combustion engine in the air was kept between 90.80 Hz and 90.89 Hz, and the average frequency was 90.86 Hz. In the water, the working frequency of pulse combustion engine was kept between 87.27 Hz and 87.81 Hz, and the average frequency was 87.51 Hz. The thermal efficiencies of the steam generator under the rated and non-rated operating conditions were 95.5% and 95.8% respectively, and the difference was less than 0.3%. Under the rated operating conditions, steam production, oil consumption and power of the steam generator were 150 kg/h, 9.7 kg/h, 110.8 kW, respectively. Besides, tail gas temperature and excess air coefficient were 108 and 1.026, respectively. The steam generator can meet the requirement of steam in soil steam disinfection quite well. The research provided a reference for the research and development of the soil steam disinfection machine used in protected horticulture industry. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Steam engines
Controlled terms: Chemical contamination? - ?Chemical properties? - ?Combustion chambers? - ?Combustion equipment? - ?Crops? - ?Descaling? - ?Disinfection? - ?Efficiency? - ?Oils and fats? - ?Pesticides ? - ?Pulse generators? - ?Soils? - ?Steam? - ?Steam generators
Uncontrolled terms: Continuous cropping obstacles? - ?Continuous development? - ?Excess air coefficient? - ?Protected horticulture? - ?Pulse combustion? - ?Research and development? - ?Soil physical and chemical properties? - ?Thermal efficiency
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?521.2 Combustors
Combustors
? - ?614.2 Steam Power Plant Equipment and Operation
Steam Power Plant Equipment and Operation
? - ?617.3 Steam Engines
Steam Engines
? - ?654.2 Rocket Engines
Rocket Engines
? - ?713.4 Pulse Circuits
Pulse Circuits
? - ?801 Chemistry
Chemistry
? - ?803 Chemical Agents and Basic Industrial Chemicals
Chemical Agents and Basic Industrial Chemicals
? - ?804.1 Organic Compounds
Organic Compounds
? - ?821.4 Agricultural Products
Agricultural Products
? - ?822.3 Food Products
Food Products
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Frequency 8.73e+01Hz to 8.78e+01Hz, Frequency 8.75e+01Hz, Frequency 9.08e+01Hz to 9.09e+01Hz, Frequency 9.09e+01Hz, Mass_Flow_Rate 2.69e-03kg/s, Mass_Flow_Rate 3.61e-02kg/s, Mass_Flow_Rate 4.17e-02kg/s, Percentage 3.00e-01%, Percentage 9.55e+01%, Percentage 9.58e+01%, Power 1.07e+05W, Power 1.11e+05W, Pressure 6.00e+05Pa
DOI: 10.6041/j.issn.1000-1298.2018.08.035
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
36. Effects of Different Water Management on Growth Physiology and Water-saving of Dry Direct Seeding Rice
Accession number: 20184406012688
Title of translation: 不同水分管理旱直播水稻生長生理與節(jié)水效應(yīng)
Authors: Wei, Yongxia (1, 2); Hou, Jingxiang (1); Wu, Yu (3, 4); Liu, Hui (5); Ru, Chen (1); Yang, Junming (1)
Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (3) Heilongjiang Agricultural Reclamation Survey and Research Institute, Harbin; 150090, China; (4) College of Forestry, Nortneast Forestry University, Harbin; 150040, China; (5) College of Science, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Liu, Hui(xiaolaida@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 253-264
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to explore a water-saving planting model with high efficient of rice in the northeast black soil area, the test pit micro area experiment was set up in Qing’an County, Heilongjiang Province in 2017. The effects of photosynthetic characteristics, biomass yield, dry matter accumulation rate, root shoot ratio, intensity of injury flow, yield water use efficiency (WUEy), leaf water use efficiency (WUEl) and yield factors on dry direct seeding rice were analyzed. Three treatments were set: drip irrigation dry direct seeding (DH), flood irrigation in dry land (MH) and conventional basin irrigation (CK). Results showed that the net photosynthetic rate (Pn, except late tillering), transpiration rate (Tr), stomatal conductance (Gs), the accumulation of dry matter in different organs, the cumulative rate of dry matter in the crown (except for mid to late tillering) and crown maximum cumulative rate were less than those of CK during the whole growth period, but WUEl, root dry matter accumulation (except the early and mid tillering), the root of the accumulation rate of dry matter and root activity (except mid tillering and jointing booting stage) were higher than those of CK. The intercellular CO2 concentration (Ci) of the three treatments had little change during the whole growth period. The maximum cumulative rate of root, maximum cumulative rate of total dry matter, the root and crown ratio of each growth period were the largest in DH, and the lowest in CK. The decreasing of 1 000 grain weight and seed setting rate of DH and MH treatments were not significant compared with CK (P>0.05). The spike length and grain number per spike were decreased significantly (Py was increased by 2.66 and 1.64 times, respectively. Drip irrigation and dry direct seeding not only significantly reduced irrigation water consumption, but also significantly increased the WUEy of rice, and it had considerable economic benefits and significant social benefits. The study results can provide technical support for the planting mode of rice in the black soil region of northeast, which had a great significance for the sustainable utilization of agricultural soil and water resources in the black soil region. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 48
Main heading: Irrigation
Controlled terms: Biomass? - ?Ecology? - ?Economic and social effects? - ?Efficiency? - ?Grain (agricultural product)? - ?Plants (botany)? - ?Soils? - ?Water conservation? - ?Water management? - ?Water supply
Uncontrolled terms: Dry land? - ?Dry matter accumulation? - ?Intensity of injury flow? - ?Photosynthetic characteristics? - ?Water use efficiency
Classification code: 444 Water Resources
Water Resources
? - ?446.1 Water Supply Systems
Water Supply Systems
? - ?454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
? - ?971 Social Sciences
Social Sciences
Numerical data indexing: Percentage 3.95e+01%, Percentage 6.39e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.030
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
37. Reference Crop Evapotranspiration Prediction Model of Arid Areas of Northwest China Based on MEA-BPNN
Accession number: 20184406012685
Title of translation: 基于MEA-BPNN的西北旱區(qū)參考作物蒸散量預(yù)報(bào)模型
Authors: Cui, Ningbo (1, 2); Wei, Jun (1); Zhao, Lu (1, 2); Zhang, Qingwen (1); Gong, Daozhi (3); Wang, Mingtian (4)
Author affiliation: (1) State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu; 610065, China; (2) Provincial Key Laboratory of Water-saving Agriculture in Hill Area of Southern China, Chengdu; 610066, China; (3) State Engineering Laboratory for Efficient Water Use and Disaster Loss Reduction of Crops, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (4) Institute of Plateau Meteorology, China Meteorological Administration, Chengdu; 610071, China
Corresponding author: Zhao, Lu(luya1121@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 228-236 and 307
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To effectively improve the prediction accuracy of the reference crop evapotranspiration (ET0) in the arid regions of Northwest China, five representative meteorological sites were selected in the arid Northwest China to construct 10 errors back propagation neural network (BPNN) optimized by mind evolutionary algorithm (MEA) model. This model was used to forecast ET0 and compared with the three models of Hargreaves-Samani model, Irmak model and 48-PM model which had higher accuracy in the northwest arid region. The results showed that the simulation accuracy of the MEA-BPNN model was basically high at different input levels, including MEA-BPNN1 (input Tmax, Tmin, RH, n and u2), MEA-BPNN2 (input Tmax, Tmin, n and u2) and MEA-BPNN3 (input Tmax, Tmin, RH and u2). The determination coefficient R2 and Nash-Sutcliffe efficiency coefficient NSE of the models were greater than 0.96, RMSE and MAE was less than 0.34 mm/d and 0.25 mm/d. The GPI rankings of the above three MEA-BPNN models were 1, 2 and 3, respectively. The R2 and NSE of MEA-BPNN7 (input Tmax, Tmin, and u2) was 0.966 2 and 0.962 2, RMSE and MAE was 0.361 0 mm/d and 0.276 1 mm/d, respectively, and the simulation accuracy was high. The analysis of the portability of the MEA-BPNN model showed that the MEA-BPNN model in the arid northwestern China had strong generalization ability, and the forecasting model constructed based on different site data also had high accuracy. The simulation accuracy of the MEA-BPNN model was higher than that of the Hargreaves-Samani model, Irmak model and 48-PM model with the same input. Therefore, in the absence of meteorological data, the MEA-BPNN model can be used as a recommended model for the calculation of ET0 in the northwest arid regions, which can provide a scientific basis for real-time accurate irrigation forecasting. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 36
Main heading: Weather forecasting
Controlled terms: Arid regions? - ?Backpropagation algorithms? - ?Computer software portability? - ?Crops? - ?Evapotranspiration? - ?Meteorology? - ?Neural networks
Uncontrolled terms: Arid area? - ?Arid northwestern China? - ?Back-propagation neural networks? - ?Determination coefficients? - ?FORECAST model? - ?Mind evolutionary? - ?Mind evolutionary algorithm (mea)? - ?Reference crop evapotranspirations
Classification code: 443 Meteorology
Meteorology
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?723.4 Artificial Intelligence
Artificial Intelligence
? - ?821.4 Agricultural Products
Agricultural Products
DOI: 10.6041/j.issn.1000-1298.2018.08.027
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
38. Distribution Model of Chlorophyll Content for Longan Leaves Based on Hyperspectral Imaging Technology
Accession number: 20184406012660
Title of translation: 基于高光譜圖像的龍眼葉片葉綠素含量分布模型
Authors: Yue, Xuejun (1, 2); Ling, Kangjie (1, 2); Hong, Tiansheng (1, 3); Gan, Haiming (1, 2); Liu, Yongxin (1, 2); Wang, Linhui (1, 2)
Author affiliation: (1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou; 510642, China; (2) College of Electronic Engineering, South China Agricultural University, Guangzhou; 510642, China; (3) College of Engineering, South China Agricultural University, Guangzhou; 510642, China
Corresponding author: Hong, Tiansheng(tshong@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 18-25
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Traditional hyperspectral single point detection methods of obtaining chlorophyll content of longan leaves are inefficiency, low accuracy and time consuming. Combined with the state-of-the-art deep learning technology, a distribution model of chlorophyll content for longan leaves based on convolution neural networks (CNN) and deep neural networks (DNNs) was proposed. Firstly, the spectral noise was reduced by Savitzky-Golay filter. The initial features extraction was carried out by using a principle component analysis (PCA) to identity a number of potential characteristic wavelengths (483 nm, 518 nm, 625 nm, 631 nm, 642 nm and 675 nm) according to the weight coefficient distribution curve of the first three principle component images (PC1, PC2 and PC3) under the full wavelengths. For the characteristic spectral images and the principal component images, the texture based on the gray level co-occurrence matrix was extracted from those images, and the structure information of those images was also extracted based on CNN simultaneously. Among the 300 samples, there were total of 1 800 spectral images and 900 principal component images, in which a sample corresponding to six characteristic spectrum images and three PCA images for a sample. Gray-level co-occurrence matrix (GLCM) was utilized to extract texture features. The hyperspectral wavelength feature data, texture data, images structure data and the combined data were utilized to develop particle swarm optimization-support vector regression (PSO-SVR) and independent component analysis-deep neural networks (ICA-DNNs), respectively. The particle swarm optimization (PSO) was introduced to intelligently optimize the parameters (γ and c) in the SVR model to find the optimum. Some main conclusions ware obtained: the performance of PSO-SVR model based on characteristic spectrum was the best, and the coefficient of determination (R2) of calibration set and validation set of the entire growth state were up to 0.822 0 and 0.815 2, respectively. Multi-source data fusion performance of ICA-DNNs was the best, and the precision of ICA-DNNs model was improved based on feature spectrum, texture feature and images structural feature, the R2 of calibration set and validation set were 0.835 8 and 0.821 0, respectively. Compared with traditional methods of SVR, DNNs was more robust for lager data set. The longan leaf textures and CNN characteristics were less relevant to longan chlorophyll content distribution. Chlorophyll content distribution region for tender, pale and dark green longan leaves were: mesophyll of the leaf-root, part of mesophyll of lateral veins and the whole mesophyll. Finally, hyperspectral technology could obtain accurate chlorophyll content of longan leaves rapidly, quantitatively and non-destructively. The research result can provide a theoretical basis for nutrition surveillance of longan growth and longan disease such as leaf spot, brown spot and leaf blight. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 33
Main heading: Image enhancement
Controlled terms: Calibration? - ?Chlorophyll? - ?Data fusion? - ?Deep learning? - ?Deep neural networks? - ?Hyperspectral imaging? - ?Image analysis? - ?Image texture? - ?Independent component analysis? - ?Matrix algebra ? - ?Particle swarm optimization (PSO)? - ?Principal component analysis? - ?Spectroscopy? - ?Spectrum analysis
Uncontrolled terms: Coefficient of determination? - ?Convolution neural network? - ?Gray level co occurrence matrix(GLCM)? - ?Gray level co-occurrence matrix? - ?Hyperspectral imaging technologies? - ?Longan leaves? - ?Principle component analysis? - ?Support vector regression (SVR)
Classification code: 723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?804.1 Organic Compounds
Organic Compounds
? - ?921.1 Algebra
Algebra
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Size 4.83e-07m, Size 5.18e-07m, Size 6.25e-07m, Size 6.31e-07m, Size 6.42e-07m, Size 6.75e-07m
DOI: 10.6041/j.issn.1000-1298.2018.08.002
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
39. Numerical Simulation on Continuous Non-submerged Water Jet Vibration Cleaning Process for Granular Agricultural Products
Accession number: 20184406012697
Title of translation: 顆粒農(nóng)產(chǎn)品連續(xù)非淹沒式水射流振動(dòng)清洗過程數(shù)值模擬
Authors: Zhao, Zhangfeng (1); Yu, Chengyan (1); Zhong, Jiang (1); Huang, Jianhong (2); Zhang, Xian (1)
Author affiliation: (1) College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Zhejiang Shangyang Machinery Co., Ltd., Quzhou; 324000, China
Corresponding author: Zhang, Xian(xianzh168@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 331-337
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to improve the cleaning rate of granular agricultural products, a continuous non-submerged water jet vibration cleaning scheme was proposed. According to the force analysis of particles, the motion equations of the particles were derived. The related parameters affecting the particle motion were analyzed, and the impact force of water jet and the intergranular contact force of the particles were studied briefly. Then, the FLUENT-EDEM coupling simulation model of the cleaning process was constructed by using the method of computational fluid mechanics and discrete element method. The dynamic cleaning process of the granular agricultural products washing machine was simulated, and the cleaning rate of the agricultural products was calculated. On the premise of the given amplitude, nozzle type and cleaning target distance, the influence of vibration frequency and initial angle, nozzle inlet pressure and direction angle on washing rate was discussed by the orthogonal analysis. The results showed that the inlet pressure and direction angle of the nozzle had the greatest effect on the cleaning rate, while the vibration frequency and initial angle of the vibration groove had less influence on the cleaning rate. When the vibration frequency of the vibrating groove was 3 Hz, the inlet pressure was 0.7 MPa and the angle of water jet was π/3, the particles had the highest cleaning rate. Finally, the cleaning test platform system was designed and manufactured, and the cleaning experiment was carried out. The experimental results were in good agreement with the theoretical analysis. The research results can be used in the design and optimization of related equipment. Some of the results can be used in the research and equipment design of agricultural products grading and optimization. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Vibration analysis
Controlled terms: Agricultural products? - ?Computer simulation? - ?Equations of motion? - ?Fluid mechanics? - ?Grading? - ?Impact testing? - ?Jets? - ?Mine roof supports? - ?Nozzles? - ?Numerical models ? - ?Product design? - ?Washing
Uncontrolled terms: Computational fluid mechanics? - ?Coupling simulation? - ?Design and optimization? - ?Intergranular contacts? - ?Non-submerged? - ?Orthogonal analysis? - ?Vibration frequency? - ?Water jets
Classification code: 502.2 Mine and Quarry Equipment
Mine and Quarry Equipment
? - ?631.1 Fluid Flow, General
Fluid Flow, General
? - ?723.5 Computer Applications
Computer Applications
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
? - ?921 Mathematics
Mathematics
? - ?921.2 Calculus
Calculus
? - ?931.1 Mechanics
Mechanics
Numerical data indexing: Frequency 3.00e+00Hz, Pressure 7.00e+05Pa
DOI: 10.6041/j.issn.1000-1298.2018.08.039
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
40. Effect of Ultrahigh Pressure Homogenization on Stability of Perilla Oil Nanoemulsion
Accession number: 20184406012704
Title of translation: 超高壓均質(zhì)對(duì)紫蘇油納米乳液穩(wěn)定性的影響
Authors: Li, Yang (1); Hu, Miao (1); Xie, Fengying (1, 2); Qi, Baokun (1); Sun, Yufan (1)
Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China; (2) Harbin Food Industry Research Institute, Harbin; 150028, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 381-387
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Perilla oil nanoemulsions, stabilized soybean protein isolated protein (SPI)-phosphatidyl choline, was prepared by using ultrahigh pressure homogenous technology. The effects of different SPI concentrations and ultrahigh homogenous pressures on stability of perilla oil nanoemulisons were researched. The results showed that with the increase of SPI concentration and ultrahigh homogenous pressure, the mean particle size and PDI were gradually decreased. The perilla oil nanoemulsions had the smallest mean particle size (230 nm) and the lowest PDI value (0.15) under the condition of 4% SPI concentration and 140 MPa ultrahigh homogenous pressure, which showed that the perilla oil nanoemulsions was homogeneous under this condition. After storage experiment for 21 d, perilla oil nanoemulsions had strong physical stability by using Turbiscan stability analyzer and no change of mean particle size at 4% SPI concentration and 140 MPa ultrahigh homogenous pressure. There was no fat separation or aggregation in the nanoemulsions with 4% SPI concentration and 140 MPa ultrahigh homogenous pressure. The content of α-helix was decreased gradually but the content of β-fold and random coil were increased by using circular dichroism spectrum, which demonstrated that the change of the secondary structure of interfacial protein had a certain effect on the stability of perilla oil nanoemulsion. Study on the stability of perilla oil nanoemulsion provided a theoretical basis for the development of novel nano foods and the industrialized production of nanoemulsions. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Soybean oil
Controlled terms: Convergence of numerical methods? - ?Dichroism? - ?Drying oils? - ?Particle size? - ?Proteins? - ?Stability
Uncontrolled terms: Circular dichroism spectra? - ?Industrialized production? - ?Nano-emulsions? - ?Perilla? - ?Phosphatidyl choline? - ?Physical stability? - ?Secondary structures? - ?Ultra-high pressure homogenizations
Classification code: 741.1 Light/Optics
Light/Optics
? - ?804.1 Organic Compounds
Organic Compounds
? - ?921.6 Numerical Methods
Numerical Methods
Numerical data indexing: Percentage 4.00e+00%, Pressure 1.40e+08Pa, Size 2.30e-07m
DOI: 10.6041/j.issn.1000-1298.2018.08.046
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
41. Parameter Analysis of Spatial Angle about Rope-cliping and Hook of D-knotter
Accession number: 20184406012670
Title of translation: D型打結(jié)器夾繩盤-打結(jié)嘴空間角度參數(shù)分析
Authors: Zhang, Anqi (1); Feng, Yangyang (2); Dong, Hao (2); Zhang, Shaoying (2); Han, Lujia (2)
Author affiliation: (1) Beijing Research Center of Intelligent Equipment for Agriculture, Beijing; 100097, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Han, Lujia(hanlj@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 100-109
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The rotary shaft hole centerline of rope-clipping component and the rotary shaft hole centerline of knotter hook are basic design parameters in the D-knotter’s structural design. By establishing space coordinate system, the space angular relationship of those two rotary shaft hole centerlines were described analytically. With the help of differential geometry theory, the numerical analysis conditions of the sport relations between rope-clipping component and knotter hook were established, the influences of related parameters, including k0,k1,α2 and d5 on the action of rope-sending and rope-towing were analyzed. The results showed that action of rope-sending and rope-towing would be successful when the values of α2 and d5 were 8°and 54 mm, respectively. The influences of related parameters, including j2,j1,α1 and α3 on the action of rope-winding and rope-biting were analyzed. The results showed that action of rope-winding and rope-biting would be successful when the values of α1 and α3 were 10° and 25°, respectively. Based on the analyzing angle parameter of the D-knotter, the physical model of each part of the D-knotter was obtained by machining. Then the forming performance test of the designed D-knotter and the D-knotter from Germany was carried out, totally 200 experiments were carried out to observe the effect of tying rope on the two kinds of D-knotter. The experimental results showed that the rope structure was basically the same from the two D-knotters, and the knotting rate of the two kinds of D-knotter was all 100%. The experimental results showed that spatial angle parameters of rope-clipping component and knotter hook were correct, and the analytical model was accurate and reliable. The model could be used for the parametric design of D-knotter. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Rope
Controlled terms: Geometry? - ?Hooks? - ?Spatial variables measurement? - ?Structural design? - ?Winding
Uncontrolled terms: Analysis conditions? - ?Baler? - ?Differential geometry theory? - ?Forming performance? - ?Knotter? - ?Parameter analysis? - ?Parametric design? - ?Spatial angle
Classification code: 408.1 Structural Design, General
Structural Design, General
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?921 Mathematics
Mathematics
? - ?943.2 Mechanical Variables Measurements
Mechanical Variables Measurements
Numerical data indexing: Percentage 1.00e+02%, Size 5.40e-02m
DOI: 10.6041/j.issn.1000-1298.2018.08.012
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
42. Trend Analysis of Water Use Efficiency and Yield of Dryland Maize under Climate Change
Accession number: 20184406012683
Title of translation: 氣候變化條件下旱作玉米用水效率與單產(chǎn)變化趨勢(shì)分析
Authors: Wang, Yubao (1, 2); Chai, Chengliang (1, 2); Zhang, Peng (2, 3); Zhao, Qi (1, 2); He, Jianqiang (1, 2); Sun, Shikun (1, 2)
Author affiliation: (1) Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas, Ministry of Education, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) College of Agronomy, Northwest A&F University, Yangling; Shaanxi; 712100, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 210-218
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Rain-fed agriculture is highly susceptible to climatic conditions. Study on analyzing the trend of yield and water use efficiency of rain-fed maize under climate change conditions is useful for agricultural production planning, which can provide adaptation strategies to climate change for agricultural production. Two test sites of Heyang and Changwu in Weibei highland were set as the study area. Experiment data in maize field was used to evaluate the applicability of CERES-Maize. Finally, the meteorological data produced from regional climate model (RegCM4.0) was used to predict maize yield and its water footprint before 2050. Results showed that the CERES-Maize model could precisely simulate the rain-fed maize yield and phenology; the absolute relative error (ARE) of most samples was less than 10%; the CERES-Maize model had good applicability in the rain-fed agricultural area in Weibei highland. Using the CERES-Maize model to simulate the water footprint of maize production was more accurate and reliable than using traditional water footprint calculation method. Under the RCP2.6 climate scenario, maize yield showed an increasing trend with increasing temperature and effective precipitation during the growing season; under the RCP8.5 scenario, maize yield showed a declining trend with increasing temperature and decreasing effective precipitation during the growth period. The excessive temperature rise had an obvious negative effect on maize yield, and the precipitation was positively correlated with the water use efficiency of maize. In order to effectively deal with the negative impact of climate change on the rain-fed crop yields, measures should be adopted, such as reducing greenhouse gas emissions, enhancing soil water storage and preserving moisture capacity, developing rainwater catchment irrigation, and selecting and cultivating water-saving and drought-resistant varieties. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 36
Main heading: Climate change
Controlled terms: Catchments? - ?Climate models? - ?Cultivation? - ?Digital storage? - ?Drought? - ?Efficiency? - ?Gas emissions? - ?Greenhouse gases? - ?Production control? - ?Rain ? - ?Soil moisture? - ?Temperature? - ?Water conservation? - ?Water resources? - ?Water supply
Uncontrolled terms: CERES maizes? - ?Maize? - ?Water use efficiency? - ?Weibei highlands? - ?Yield
Classification code: 443 Meteorology
Meteorology
? - ?444 Water Resources
Water Resources
? - ?446.1 Water Supply Systems
Water Supply Systems
? - ?451.1 Air Pollution Sources
Air Pollution Sources
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?641.1 Thermodynamics
Thermodynamics
? - ?722.1 Data Storage, Equipment and Techniques
Data Storage, Equipment and Techniques
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?913.1 Production Engineering
Production Engineering
? - ?913.2 Production Control
Production Control
? - ?921 Mathematics
Mathematics
DOI: 10.6041/j.issn.1000-1298.2018.08.025
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
43. Adaptive Robust Finite-time Tracking Control for Piezoelectric Micropositioning Systems
Accession number: 20184406012707
Title of translation: 壓電微定位系統(tǒng)自適應(yīng)魯棒有限時(shí)間跟蹤控制
Authors: Kang, Shengzheng (1); Wu, Hongtao (1); Yang, Xiaolong (1); Li, Yao (1); Cheng, Shili (2)
Author affiliation: (1) College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing; 210016, China; (2) School of Automotive Engineering, Yancheng Institute of Technology, Yancheng; 224000, China
Corresponding author: Wu, Hongtao(mehtwu@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 403-410
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Piezoelectric micropositioning system (PMS) plays an important role in precision positioning applications. However, due to the inherent hysteresis nonlinearity of piezoelectric materials and the external disturbance of the system, these time-varying uncertainties seriously affect the positioning accuracy of piezoelectric materials. In response to the problems, an adaptive robust finite-time control strategy based on function approximation was proposed for PMS, the positioning accuracy of which was subjected to external disturbances, hysteresis and other time-varying nonlinear uncertainties. The trajectory tracking control law for PMS was designed by introducing a terminal sliding surface with continuous nonsingular and finite-time convergence characteristics. The dynamic approximation was carried out by using Fourier series, making the controller independent to the boundary information of the system’s uncertainties. A fuzzy logic system was then used to on-line compensate the approximation error. Finally, a Lyapunov function was applied to obtain the adaptive laws of Fourier coefficients and fuzzy adjustment parameters, and the finite-time stability of the proposed controller was proved. Simulations and experiments were carried out to verify the robustness and effectiveness of the proposed control strategy. In the simulations, the proposed control strategy was compared with the fast non-singular terminal sliding mode control and the adaptive fuzzy sliding mode control based on function approximation, and the performance of the three controllers in tracking multi-frequency sinusoidal and triangular trajectories was tested. The robust anti-disturbance ability of the controllers was also verified. The experimental results further showed the superiority of the proposed controller. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Adaptive control systems
Controlled terms: Computer circuits? - ?Control system synthesis? - ?Controllers? - ?Discrete time control systems? - ?Fourier analysis? - ?Fourier series? - ?Fuzzy logic? - ?Hysteresis? - ?Lyapunov functions? - ?Navigation ? - ?Piezoelectric materials? - ?Piezoelectricity? - ?Sliding mode control
Uncontrolled terms: Adaptive Control? - ?Function approximation? - ?Fuzzy logic system? - ?Micro positioning? - ?Terminal sliding mode
Classification code: 701.1 Electricity: Basic Concepts and Phenomena
Electricity: Basic Concepts and Phenomena
? - ?708.1 Dielectric Materials
Dielectric Materials
? - ?721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
? - ?721.3 Computer Circuits
Computer Circuits
? - ?731.1 Control Systems
Control Systems
? - ?732.1 Control Equipment
Control Equipment
? - ?921 Mathematics
Mathematics
? - ?921.3 Mathematical Transformations
Mathematical Transformations
? - ?961 Systems Science
Systems Science
DOI: 10.6041/j.issn.1000-1298.2018.08.049
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
44. Design of Safflower Filament Picking Device Based on TRIZ Theory
Accession number: 20184406012667
Title of translation: 基于TRIZ理論的紅花絲盲采裝置設(shè)計(jì)與試驗(yàn)
Authors: Cao, Weibin (1); Jiao, Haobo (1); Liu, Jiaodi (2); Yang, Shuangping (1); Chen, Bangbang (1); Sun, Weiling (1)
Author affiliation: (1) College of Mechanical and Electrical Engineering, Shihezi University, Shihezi; 832000, China; (2) College of Machine and Controlling Engineering, Guilin University of Technology, Guilin; 541006, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 76-82
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To improve picking efficiency of safflower filament harvesting device, a safflower filament harvesting device was developed based on TRIZ theory, which can pick safflower filament without the machine vision, called as safflower filament blind harvesting device. Through analyzing the whole process that people pick safflower filaments, the substance-field models of picking safflower filaments were built to guide how to design safflower filament picking device. The optimized picking method, as a result, was created according to that substance-field. This process existed that as they were moved without looking at safflower filament, two personal fingers were continuously opened and closed to pick safflower filament. Therefore, the probability that safflower filaments were picked without machine vision was very big. Through the above study, the safflower filament blind picking method was feasible. Force of personal fingers picking safflower filaments was flexible, so that the cam and spring mechanism were chosen as drive mechanism of the safflower filaments picking device to imitate soft drive system of personal finger picking safflower filaments. A general cam and spring mechanism only had an moving action along the one direction, however, there were necessary two actions to achieve the function of safflower filaments picking, which were clamping action and drawing action. Hence, a general cam and spring mechanism cannot satisfy the safflower filaments picking requirements. To solve that problem, the useful functions and harmful functions of a general cam mechanism were parameterized based on thirty-nine engineering parameters of TRIZ theory, and some principles to solve the problem were gained from the conflict matrix. The dynamic principle and reverse principle from the principles gained were applied to solve the above question. Finally, the existed cam structure can be changed, so that a new cam structure that the pushing bar rotates around the outline of the still cam can be created to simplify the structural complexity safflower filaments picking device. Through analyzing kinetic characteristics of safflower filaments picking device, it took some time that the pushing bar passes the return curve, resulting in that safflower filaments cannot be clamped quickly, making the picking ratio very low. To solve the difficulty of low picking efficiency, the arc shape picking finger shape was developed, filling in the gap of the time spending on clamping picking fingers and improving safflower filaments picking efficiency. Through the kinematical simulation of the safflower filament device, it was successive that the curves simulated the picking finger speed and acceleration, indicating that kinematical characteristics of the safflower filament device were suitable. The physical prototype of the safflower filament device was manufactured, and the picking performance of the safflower filament device was tested. The experiment results showed that picking ratio was about 90%, so that the device can meet picking requirements. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Structural design
Controlled terms: Cams? - ?Computer vision? - ?Efficiency? - ?Harvesting? - ?Problem solving
Uncontrolled terms: Arc shape? - ?Engineering parameters? - ?Harvesting devices? - ?Kinetic characteristics? - ?Picking device? - ?Picking efficiency? - ?Structural complexity? - ?TRIZ theories
Classification code: 408.1 Structural Design, General
Structural Design, General
? - ?601.3 Mechanisms
Mechanisms
? - ?723.5 Computer Applications
Computer Applications
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Percentage 9.00e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.009
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
45. Kinetical Feature for Acetate Esters Production during Ecolly Dry White Wine Fermentation
Accession number: 20184406012701
Title of translation: 愛格麗干白葡萄酒發(fā)酵過程中典型乙酸酯的生成動(dòng)力學(xué)
Authors: Li, Yunkui (1, 2); Wang, Xingjie (1); Jin, Guojie (1, 2); Song, Hongcong (1); Liu, Hao (1); Tao, Yongsheng (1, 2)
Author affiliation: (1) College of Enology, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Shaanxi Engineering Research Center for Viti-Viniculture, Yangling; Shaanxi; 712100, China
Corresponding author: Tao, Yongsheng(taoyongsheng@nwsuaf.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 360-367
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Acetic esters are an important contributor to the fruity aroma of wine. The aim of the research was to explore the kinetical feature for the formation of important acetic esters, using Ecolly to ferment dry white wine according to conventional process after being inoculated with active yeast. During the fermentation process, the ethanol and acetic acid contents were monitored and the contents of representative aroma of isoamyl alcohol, phenethyl alcohol, ethyl acetate, isoamyl acetate and phenethyl acetate were analyzed by SPME-GC-MS so as to achieve the feature of odor activity and establish corresponding kinetical models based on the classical principle of chemical reaction kinetics. The results showed that the isoamyl acetate exhibited aroma active through the fermentation process, and phenethyl acetate was only aroma active at the maximum production, while ethyl acetate was lower than the olfactory threshold. The contents of the considered aroma from the beginning to the maximum production were in line with the zero order kinetical feature (R2>0.95, P ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Kinetics
Controlled terms: Acetic acid? - ?Chemical analysis? - ?Esters? - ?Ethanol? - ?Fermentation? - ?Odors? - ?pH? - ?Process control? - ?Reaction kinetics? - ?Wine
Uncontrolled terms: Aroma substances? - ?Feature modeling? - ?Fermentation process? - ?Isoamyl alcohol? - ?Phenethyl alcohol? - ?Production of ethyl acetates? - ?White wines? - ?Zero order kinetics
Classification code: 801.1 Chemistry, General
Chemistry, General
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?804.1 Organic Compounds
Organic Compounds
? - ?822.3 Food Products
Food Products
? - ?931 Classical Physics; Quantum Theory; Relativity
Classical Physics; Quantum Theory; Relativity
DOI: 10.6041/j.issn.1000-1298.2018.08.043
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
46. Theoretical Analysis and Experiment of Liquid Piezo-hydraulic Energy Harvester
Accession number: 20184406012501
Title of translation: 充液壓電液阻俘能器理論分析與實(shí)驗(yàn)
Authors: Li, Zheng (1, 2); Yang, Zhigang (1); Kan, Junwu (3); Li, Sheng (4); Yan, Bo (2)
Author affiliation: (1) College of Mechanical Science and Engineering, Jilin University, Changchun; 130022, China; (2) College of Civil Engineering, Jilin Jianzhu University, Changchun; 130118, China; (3) College of Mathematics Physics and Information Engineering, Zhejiang Normal University, Jinhua; 321004, China; (4) Liaoyang Qingyang Special Chemical Co.,Ltd., Liaoyang; 111001, China
Corresponding author: Yang, Zhigang(yzg@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 420-426
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to improve the small intelligent components of vibration isolation, vibration reduction and power generation capacity, a kind of liquid piezo-hydraulic energy harvester was designed, the use of sheet deformation superposition theory under the action of concentrated load was established for the electricity generating capacity of the circular piezoelectric vibrator displacement curve and calculation model. Research results showed that the prisoner can implement the output voltage, which was proportional to the driving voltage in a fixed frequency, output voltage of captive can increase with the increase of system back pressure, power voltage was increased firstly and then decreased, and the best voltage back pressure existed to maximize the voltage, and the best back pressure was affected by the frequency. Mechanical and electrical equivalent model was established, by changing the circuit impedance equivalent analysis, the results were consistent with the theoretical simulation results, the established circuit model can true reflect characteristics of the theoretical model. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Electric network analysis
Controlled terms: Energy harvesting? - ?Piezoelectricity
Uncontrolled terms: Equivalent model? - ?Hydraulic energy? - ?Intelligent components? - ?Mechanical and electrical? - ?Piezoelectric disks? - ?Piezoelectric vibrators? - ?Power generation capacities? - ?Theoretical simulation
Classification code: 525.5 Energy Conversion Issues
Energy Conversion Issues
? - ?701.1 Electricity: Basic Concepts and Phenomena
Electricity: Basic Concepts and Phenomena
? - ?703.1.1 Electric Network Analysis
Electric Network Analysis
DOI: 10.6041/j.issn.1000-1298.2018.08.051
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
47. Optimal Design and Experiment on Variable Pacing Combing Brush Picking Device for Lycium barbarum
Accession number: 20184406012668
Title of translation: 變間距梳刷式枸杞采收裝置優(yōu)化設(shè)計(jì)與試驗(yàn)
Authors: Zhang, Wenqiang (1); Li, Zhaozhao (1); Tan, Yuzhi (1); Li, Wei (1)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Tan, Yuzhi(yztan@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 83-90
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The L. barbarum is a kind of infinite inflorescence berry plants, which means it must be picked once about every 7 d and need to be harvested 12 times a year during its growing season. At present, the artificial picking L. barbarum has the disadvantages of low efficiency and high labor intensity. With the market demand of L. barbarum growing increasingly year by year, its planting acreage is expanding quickly, a great deal with fruit pickers are demanded. However, the number of people to be skilled at picking L. barbarum is less and less. Mechanization of L. barbarum picking device can improve production efficiency, save planting costs and promote the rapid development of L. barbarum industry, thus the realization of L. barbarum mechanical picking is necessary. The selective picking principle was based on different fruit diameters between the mature and immature fruit, relying on friction and impulse force between the finger and L. barbarum to pick off the mature fruit. The immature L. barbarum, flowers and leaves would pass through the gaps between two fingers. However, mature L. barbarum approximate ellipsoid flexible body, during the brushing process, L. barbarum was clamped between two fingers and could not free fall off, affecting the follow-up picking. Therefore, variable pacing controlling component was designed to solve this problem. Firstly, to obtain the most reasonable brush finger spacing at two different limit positions, a mathematical model of the structural parameters of the variable pacing controlling component was established, which was optimized by fmincon function in Matlab software, and provided reference for the design of other parts. Based on the natural and physical parameters of L. barbarum, the brush finger structure was designed. Its key component affected the harvesting effect. Its structural parameters included the length of the spring steel, the spacing of fingers and the diameter of the spring steel. The greatest impact on the picking effect was the motor speed, which was determined by single factor tests, and optimal range was under 30 r/min. The test was conducted at planting base of L. barbarum of Ningxia Academy of Agriculture and Forestry Sciences, by measuring the picking rate and the damage rate of the prototype under different structural parameters of the brush finger. A theory reference was provided for design of combing brush device. The main parameter influencing the picking rate and damage rate of the picking finger was determined by orthogonal test method which included the length of the spring steel, the spacing of fingers and the diameter of the spring steel. And the optimal results showed that the best combination was A1B2C2 group of which the spacing of fingers was 8 mm, the length of the spring steel was 45 mm, and the diameter of the spring steel was 1.1 mm. And the corresponding performance indexes were as follows: the picking rate reached 90%, yet the damage rate was only 8.41%. The results can provide a reference for the development of L. barbarum combing brush picking machines. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Structural optimization
Controlled terms: Efficiency? - ?Forestry? - ?Fruits? - ?Functions? - ?Machinery? - ?MATLAB? - ?Plants (botany)
Uncontrolled terms: L. barbarum? - ?Orthogonal test? - ?Orthogonal test method? - ?Physical parameters? - ?Picking machines? - ?Production efficiency? - ?Structural parameter? - ?Structure optimization
Classification code: 821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
? - ?921 Mathematics
Mathematics
? - ?921.5 Optimization Techniques
Optimization Techniques
Numerical data indexing: Percentage 8.41e+00%, Percentage 9.00e+01%, Rotational_Speed 3.00e+01RPM, Size 1.10e-03m, Size 4.50e-02m, Size 8.00e-03m
DOI: 10.6041/j.issn.1000-1298.2018.08.010
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
48. Improving Foaming Properties of Whey Protein Concentrate Induced by Fibrils
Accession number: 20184406012700
Title of translation: 纖維誘導(dǎo)對(duì)乳清濃縮蛋白起泡性的改善作用分析
Authors: Xu, Honghua (1); Tan, Junyan (1); Xie, Mingming (1); Ding, Rui (1); Guan, Chen (1); Wang, Xin (1)
Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 353-359
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The foaming properties of whey protein concentrate induced by mature fibrils had obvious improvement. The foaming properties of whey protein concentrate by adding an amount of mature fibrils during heat treatment was investigated. The results showed that the foaming property of whey protein concentrate induced by mature fibrils was much higher than that of whey protein concentrate spontaneous fibrillation. In addition, mature fibrils could rapidly improve the foaming properties of whey protein concentrate during the induction process, especially in the early stage (0~2 h). The foaming ability of whey protein concentrate induced by mature fibrils heated for 1 h and 2 h was 1.36 and 1.41 times than that of whey protein concentrate spontaneous fibrillation, respectively. The increase of the foaming ability of whey protein concentrate induced by mature fibrils was increased by 32.35%, compared with the increase of the foaming ability of whey protein concentrate after heated for 10 h. The difference in whey protein concentrate fibrillation capabilities may be related to the two methods of induction and spontaneous processing. Mature fibrils could accelerate whey protein concentrate fibrillation, increase the rate of polymerization and reduce the time of fibril formation. Meanwhile, the driving aggregation force of whey protein concentrate induced by mature fibrils was also changed rapidly during the early stage (0~2 h) to accelerate the formation of fibrils, compared with the spontaneous formation of whey protein concentrate. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Proteins
Controlled terms: Heat treatment
Uncontrolled terms: Fibril formation? - ?Fibrils? - ?Foaming ability? - ?Foaming properties? - ?Induction process? - ?Rate of polymerization? - ?Spontaneous formation? - ?Whey protein concentrate
Classification code: 537.1 Heat Treatment Processes
Heat Treatment Processes
? - ?804.1 Organic Compounds
Organic Compounds
Numerical data indexing: Percentage 3.24e+01%, Time 0.00e+00s to 7.20e+03s, Time 3.60e+03s, Time 3.60e+04s, Time 7.20e+03s
DOI: 10.6041/j.issn.1000-1298.2018.08.042
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
49. Experiment of Water Distribution and Uniformity of Rotating Plate Sprinkler
Accession number: 20184406012675
Title of translation: 旋轉(zhuǎn)折射式噴頭水量分布與噴灌均勻性試驗(yàn)
Authors: Zhu, Xingye (1); Wan, Jinghong (1); Fordjour, Alexander (1, 2); Zhang, Linguo (1); Yuan, Shouqi (1)
Author affiliation: (1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang; 212013, China; (2) Department of Civil Engineering, Koforidua Technical University, Eastern Region, Koforidua; 999064, Ghana
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 145-152
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To study the effect of working pressure, nozzle diameter and installation spacing on the hydraulic performance of spray depth and uniformity coefficient in sprinkler irrigation, a new typed rotating plate sprinkler was put forward. The nozzle diameters of 2.98 mm, 3.37 mm and 3.77 mm were chosen to carry out the research. The radial water distributions were measured at the working pressure of 0.1 MPa, 0.2 MPa and 0.3 MPa. It was found that the irrigation intensity was increased with the increase of nozzle operating pressure or nozzle diameter. The combined uniformity coefficient were calculated with the installation spacing of 2 m, 3 m, 4 m, 5 m and 6 m. The calculation results were compared with the testing experiments. The error value between the tested and simulated results of the combined uniformity coefficient was within 0.5%~11.0%, and the importance order of influencing factors was installation spacing, working pressure and nozzle diameter. The results showed that the average nozzle discharge coefficient was more than 0.9, which indicated that the new typed sprinkler had good performance; the optimum irrigation uniformity coefficients of three kinds of nozzles were 75.9%, 78.2% and 85.1%, respectively. The optimum installation spacing of 4 m for a new typed R3000 rotating plate sprinkler and an empirical formula for the calculation of uniformity coefficient was proposed, which provided important theoretical data for its engineering application. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 38
Main heading: Sprinkler systems (irrigation)
Controlled terms: Experiments? - ?Spray nozzles? - ?Water supply systems
Uncontrolled terms: Discharge coefficients? - ?Engineering applications? - ?Hydraulic performance? - ?Irrigation intensities? - ?Nozzle diameter? - ?Rotating plates? - ?Sprinkler irrigation? - ?Working pressures
Classification code: 446.1 Water Supply Systems
Water Supply Systems
? - ?631.1 Fluid Flow, General
Fluid Flow, General
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?901.3 Engineering Research
Engineering Research
Numerical data indexing: Percentage 7.59e+01%, Percentage 7.82e+01%, Percentage 8.51e+01%, Pressure 1.00e+05Pa, Pressure 2.00e+05Pa, Pressure 3.00e+05Pa, Size 2.00e+00m, Size 2.98e-03m, Size 3.00e+00m, Size 3.37e-03m, Size 3.77e-03m, Size 4.00e+00m, Size 5.00e+00m, Size 6.00e+00m
DOI: 10.6041/j.issn.1000-1298.2018.08.017
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
50. Preparation of Layer-by-layer Self-assembly of Chitosan and Cellulose Nanocrystals Oxygen-barrier Coatings and Evaluation of Their Properties
Accession number: 20184406012703
Title of translation: 層層自組裝CNs/CS隔氧涂覆材料制備與性能評(píng)價(jià)
Authors: Hu, Yunfeng (1); Wei, Zengyu (1); Li, Fei (1); Chem, Junran (1); Du, Wei (1); Yan, Ruixiang (2)
Author affiliation: (1) State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin; 300457, China; (2) College of Packing and Printing Engineering, Tianjin University of Science and Technology, Tianjin; 300222, China
Corresponding author: Yan, Ruixiang(yrxan@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 375-380
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Oxygen is one of the most important factors to promote browning of fresh cut fruits and vegetables. Therefore, fresh cut fruits and vegetables must be blocked as far as possible when they are packed. The application of biomaterials to existing packaging materials can greatly increase the oxygen isolation performance of packaging materials. Cellulose nanocrystals/chitosan oxygen free coating materials were prepared by coating different pH chitosan and nano cellulose coating solution on the non crystalline polyethylene terephthalate (A-PET) film. The coating process and the thickness, shape and oxygen isolation effect of the film were systematically evaluated. The results showed that the coating process adopted in the experiment was relatively stable, and the thickness of the composite film produced by different layers had a significant positive linear correlation with the number of layers of the composite coating. The composite coatings with different thicknesses can be obtained by repeatedly repeating coating layer coating. And the coating effect of CS(pH 4)/CNs(pH 2) combination was better than that of CS(pH 2)/CNs(pH 6) combination. The combination of composite membrane oxygen barrier performance test results showed that with the increase of the number of coating, the oxygen barrier performance of the composite membrane was improved continuously. However, the oxygen barrier coefficient of the composite membrane was not obviously decreased after coating to the tenth layer. Four kinds of coated oxygen-barrier films with the number of coating of 5, 10, 15, and 20 were selected to preserve fresh-cut apples and stored at 4 for 4 d. Compared with the oxygen-free membrane without coating, the brightness value of oxygen-barrier composite membrane with 20 coating layers was increased by 10.8% on the fourth day, and its nutritional content indexes of titratable acid, vitamin C content and soluble solid content were increased by 1.08 times, 23.8% and 28.6%, respectively. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 33
Main heading: Composite coatings
Controlled terms: Biomaterials? - ?Cellulose? - ?Cellulose derivatives? - ?Chitosan? - ?Coatings? - ?Composite films? - ?Composite membranes? - ?Film preparation? - ?Fruits? - ?Nanocrystals ? - ?Nanofiltration membranes? - ?Oxygen? - ?Packaging materials? - ?Plastic bottles? - ?Self assembly? - ?Vegetables
Uncontrolled terms: Cellulose nano-crystals? - ?Fresh-cut apples? - ?Layer by layer self assembly? - ?Oxygen barrier coating? - ?Oxygen barrier films? - ?Oxygen isolation? - ?Soluble solid content? - ?Vitamin c contents
Classification code: 462.5 Biomaterials (including synthetics)
Biomaterials (including synthetics)
? - ?694.2 Packaging Materials
Packaging Materials
? - ?761 Nanotechnology
Nanotechnology
? - ?802.1 Chemical Plants and Equipment
Chemical Plants and Equipment
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?804.1 Organic Compounds
Organic Compounds
? - ?811.3 Cellulose, Lignin and Derivatives
Cellulose, Lignin and Derivatives
? - ?813.2 Coating Materials
Coating Materials
? - ?821.4 Agricultural Products
Agricultural Products
? - ?951 Materials Science
Materials Science
Numerical data indexing: Percentage 1.08e+01%, Percentage 2.38e+01%, Percentage 2.86e+01%
DOI: 10.6041/j.issn.1000-1298.2018.08.045
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
51. Construction and Verification of On-line Calibrating and Measuring System about Nitrate N in Hydroponic Nutrient Solution
Accession number: 20184406012682
Title of translation: 水培營養(yǎng)液硝態(tài)氮濃度在線標(biāo)測系統(tǒng)研究
Authors: Zhao, Qian (1, 2); Wang, Lichun (1, 2); Guo, Wenzhong (1, 2); Chen, Xiaoli (1, 2); Nie, Mingjun (1, 2); Jia, Dongdong (1, 2)
Author affiliation: (1) Beijing Research Center of Intelligent Equipment for Agriculture, Beijing; 100097, China; (2) Key Laboratory of Urban Agricultural (North China), Ministry of Agriculture, Beijing; 100097, China
Corresponding author: Guo, Wenzhong(guowz@nercita.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 8
Issue date: August 25, 2018
Publication year: 2018
Pages: 203-209
Language: English
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Efficiently obtaining the concentration of nitrate N (NO3--N) in hydroponic nutrient solution is essential for crop growth. However, it is difficult to realize on-line detection due to the separation of electrode calibration and ion detection. In order to obtain the concentration of NO3--N promptly, conveniently and accurately, an on-line calibrating and measuring system was established based on dual-sensor redundancy control method and nitrate ion-selective electrode (ISE). When calibrating, screw nuts were developed for driving ISEs to move in two degrees of freedom, for the purpose of rinsing electrodes and getting standard voltages. Additionally, unknown parameters of the linear function between collected voltages and logarithms of the ion concentrations were recognized under the least squares fitting method. When measuring, a dual-sensor redundancy control method was applied to carry out periodically calibrating and rinsing, as well as on-line measurement based on the principle of maximum error. To test and verify the accuracy of this system, a no-load test and a production test were carried out. The former was compared the on-line detection concentrations with the actual values of NO3--N in the 14 single-ion (KNO3) solutions, and the latter continuously monitored the concentrations of NO3--N for 12 d in the process of lettuce production. The results showed that the dual-censor redundancy control method was reliable. The on-line detection measured by this system and the laboratory detection measured by ion chromatography showed an extremely significant linear positive correlation (P-5. Therefore, the system could realize the on-line detection of NO3--N under the continual consumption of nutrient solution, which not only had strongly relation to those determined by laboratory instrument, but also solved the problems of time-consuming and labor-intensive about manual calibration. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Ion chromatography
Controlled terms: Calibration? - ?Degrees of freedom (mechanics)? - ?Errors? - ?Ion selective electrodes? - ?Ions? - ?Least squares approximations? - ?Load testing? - ?Nitrates? - ?Nutrients? - ?Potash ? - ?Potassium Nitrate? - ?Redundancy
Uncontrolled terms: Automatic calibration? - ?Average absolute error? - ?Average relative error? - ?Least-squares-fitting method? - ?Nitrate ion selective electrode? - ?Nitrate-N? - ?Nutrient solution? - ?On-line detection
Classification code: 801 Chemistry
Chemistry
? - ?802.1 Chemical Plants and Equipment
Chemical Plants and Equipment
? - ?804.2 Inorganic Compounds
Inorganic Compounds
? - ?921.6 Numerical Methods
Numerical Methods
? - ?931.1 Mechanics
Mechanics
Numerical data indexing: Percentage 5.64e+00%
DOI: 10.6041/j.issn.1000-1298.2018.08.024
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
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