2019年第6期共收錄50篇
1. Heating Anti-adhesion Experiments of Jitter Plate of Rice Harvesting Machinery
Accession number: 20193907468614
Title of translation:
Authors: Cheng, Chao (1, 2); Fu, Jun (1, 2); Tang, Xinlong (3); Chen, Zhi (2, 4); Ren, Luquan (1, 2)
Author affiliation: (1) Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun; 130022, China; (2) College of Biological and Agricultural Engineering, Jilin University, Changchun; 130022, China; (3) Agriculture Test Station, Jilin University, Changchun; 130062, China; (4) National Machinery Industry Corporation, Beijing; 100080, China
Corresponding author: Fu, Jun(fu_jun@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 110-118
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Small, wet and sticky materials in rice threshed mixtures could be easily to adhere to the surface of metal jitter plate in cleaning device. A method to reduce the adhesion of wet sticky rice materials and metal jitter plate by interface heating was proposed. The Galvanized plate and stainless steel plate were used as test parts. The small wet sticky rice material was processed by crusher. Firstly, the model of adhesion interface between wet sticky rice material and metal jitter plate was constructed. The capillarity of water film was an important reason for the formation of adhesion interface. The anti-adhesion mechanism of interface heating of metal jitter plates was revealed. Secondly, loading and heating anti-adhesion test was carried out with electronic universal testing machine. The anti-adhesion rate curve models of Galvanized plate and stainless steel plate were obtained. The results showed that wet sticky rice materials were effectively inhibited to adhere to the surface of test parts through interface heating. The anti-adhesion rate of two kinds of metal jitter plates were respectively 61.81% and 61.33% when the temperature was 50. Then, vibrating and heating anti-adhesion test was carried out by using linear vibration test bed. The results showed that anti-adhesion rate was influenced by vibration strength of metal jitter plates. When the temperature of metal jitter plate was 40, the vibration frequency was 6 Hz, and the amplitude was 40 mm, the anti-adhesion rate exceeded 65%, which met the actual operation requirements. Finally, the verification test showed that the application of hot flow heating was an effective interface heating way to reduce adhesion between wet sticky rice materials and jitter plate in actual cleaning process. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Plate metal
Controlled terms: Adhesion? - ?Harvesters? - ?Heating? - ?Interfaces (materials)? - ?Jitter? - ?Mechanisms? - ?Metal cleaning? - ?Metals? - ?Stainless steel? - ?Vibrations (mechanical)
Uncontrolled terms: Adhesion interfaces? - ?Antiadhesion? - ?Interface heating? - ?Rice? - ?Stainless steel plate? - ?Universal testing machines? - ?Vibration frequency? - ?Vibration strength
Classification code: 545.3 Steel? - ?601.3 Mechanisms? - ?821.1 Agricultural Machinery and Equipment? - ?931.1 Mechanics? - ?951 Materials Science
Numerical data indexing: Frequency 6.00e+00Hz, Percentage 6.13e+01%, Percentage 6.18e+01%, Percentage 6.50e+01%, Size 4.00e-02m
DOI: 10.6041/j.issn.1000-1298.2019.06.012
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
2. Design and Experiment of Air-suction Precision Seed Meter with Self-clearing Seed Chamber for Corn Plot Test
Accession number: 20193907468393
Title of translation:
Authors: Yang, Wei (1, 2); Fang, Xianfa (2); Li, Jiandong (1); Li, Leixia (1)
Author affiliation: (1) Menoble Co., Ltd., Beijing; 100083, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China
Corresponding author: Fang, Xianfa(fangxf@caams.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 64-73
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to meet the needs of corn breeding test, an air-suction precision seed meter with self-clearing seed chamber was designed, whose seed chamber and seed clearing chamber were independent of each other. The process of metering and clearing did not interfere with each other. The self-purification rate could achieve 100%. The shape of breeding seeds was analyzed, and the key structural parameters of seed meter were determined according to the characteristics of breeding experiment. Dynamics analysis of the process of seed adsorption was carried out, and EDEM software was used to verify the disturbance of churn plate to the fewer population. Fluent software was used to simulate the seed clearing process. It was proved that when the remaining seeds were not more than 10 and the clearing time was not more than 1 s, the vacuum of clearing seeds was greater than 3 kPa, the remaining seeds could be cleared completely. Seeds used in breeding experiments were graded, single factor experiments were carried out in the vacuum range of 3~4 kPa. The results showed that seeds adsorbed on suction holes in the clearing stage could still be sown normally regardless of their specifications. Experiments of the normal seeding stage were carried out on the JPS-12 test bench. When the vacuum was between 6 kPa and 8 kPa, the operation speed of the seeder was less than 3.6 km/h, and the working face of the scraper was within 2~4 mm from the suction hole center, the qualified index of seed spacing exceeded 95%, the missing-seeding rate and the reseeding rate were less than 1% and 4%, respectively. Each index met the national standard. The performance of seed metering device was effective while the clearance rate could reach 100%. The field experiment of seeder proved that the seedling emergence effect met the seeding requirement of breeding experiment. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 29
Uncontrolled terms: Air suction? - ?Breeding? - ?Corn? - ?National standard? - ?Seed metering devices? - ?Seedling emergence? - ?Single-factor experiments? - ?Structural parameter
Numerical data indexing: Percentage 1.00e+00%, Percentage 1.00e+02%, Percentage 4.00e+00%, Percentage 9.50e+01%, Pressure 3.00e+03Pa, Pressure 3.00e+03Pa to 4.00e+03Pa, Pressure 6.00e+03Pa, Pressure 8.00e+03Pa, Size 2.00e-03m to 4.00e-03m, Time 1.00e+00s, Velocity 1.00e+00m/s
DOI: 10.6041/j.issn.1000-1298.2019.06.007
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
3. Hysteresis Model Based on Modified PI Model and Compensation Control for Elbow Joint Driven by Pneumatic Muscles
Accession number: 20193907468526
Title of translation: MPI
Authors: Wang, Binrui (1); Lu, Han (1); Jin, Mingtao (1); Xie, Shenglong (1)
Author affiliation: (1) College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou; 310018, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 412-418
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming to analyze the hysteresis characteristics between the air pressure and angle of four-bar elbow joint driven by pneumatic muscles. The Prandtl-Ishlinskii (PI) model of the hysteresis characteristics of elbow joint was established, the required parameters of the model were identified by Levenberg-Marquardt method. The appropriate envelope fuction for the improved Play operator was selected, and the modified Prandtl-Ishlinskii (MPI) was designed to describe the asymmetric hysteresis, compared with the classical Prandtl-Ishlinskii (CPI) model, the results of the simulation showed that the MPI model had higher fitting degree for the asymmetric hysteresis curves. Based on the MPI model, a feed-forward integral inverse compensator was designed, an integral inverse compensation controller (MPI-I-I-PID) was formed with PID. The simulation of position control of MPI-I-I-PID, PID and CPI-I-I-PID controller was completed. The results of the simulation and root-mean-square error showed that MPI-I-IPID can reduce the tracking error and improve the tracking accuracy. Equal amplitude sinusoidal signals experiment on PID, CPI-I-I-PID and MPI-I-I-PID controller under different loads was completed, according to the compensation effect influenced by the load which was explosed in the experiment, and piecewise PID control was added in the compensator. The results of experiment and root-mean-square error showed that MPI-I-I-PID can reduce the dither amplitude and tracking error of elbow joint, improve the accuracy and stability of elbow joint position control, which proved the effectiveness of the proposed hysteresis compensator. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Proportional control systems
Controlled terms: Controllers? - ?Curve fitting? - ?Electric control equipment? - ?Errors? - ?Hysteresis? - ?Mean square error? - ?Muscle? - ?Pneumatic control? - ?Pneumatic equipment? - ?Position control ? - ?Three term control systems
Uncontrolled terms: Asymmetric hysteresis? - ?Compensation effects? - ?Hysteresis characteristics? - ?Hysteresis compensation? - ?Levenberg-Marquardt method? - ?Pneumatic muscle? - ?Prandtl-Ishlinskii model? - ?Root mean square errors
Classification code: 461.2 Biological Materials and Tissue Engineering? - ?632.4 Pneumatic Equipment and Machinery? - ?731.1 Control Systems? - ?731.3 Specific Variables Control? - ?732.1 Control Equipment? - ?921.6 Numerical Methods? - ?922.2 Mathematical Statistics? - ?961 Systems Science
DOI: 10.6041/j.issn.1000-1298.2019.06.049
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
4. Hydraulic Performance of Plate-column Portable Flume in U-shaped Channel
Accession number: 20193907468457
Title of translation: U
Authors: Wang, Yubao (1, 2); Yang, Juan (1, 2); Li, Xin (1, 2); Wang, Wene (1); He, Wuquan (1)
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 Regions of China, 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: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 322-330
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Flow measurement facilities in channels are the basis for charging agricultural water according to water consumption. Because the number of small channels in irrigation districts is large, there are many sections to be measured. Therefore, mobile flow measurement facilities are recommended to measure the discharge. However, the existing mobile water measuring facilities are still not suitable enough. Combining the advantages of mobile thin plate flumes and cylindrical flumes, a plate-column portable flume was developed. Based on the analysis of the mechanism of flow measurement for the flume, prototype tests and numerical simulations of the plate-column portable flume were carried out. And the flow measurement formula was established by using the dimensional analysis method. The results showed a good relationship between water depth and flow rates in plate-column portable flumes. The upstream backwater height was between 13.69 cm and 1.85 cm, the critical submergence was between 0.91 and 0.70, and the Froude number Fr at the upstream of the plate-column portable flume was less than 0.5. The plate-column portable flume had a smaller shape than the existing circular flume and the flume with a round head and a empennage, and had a higher portability and a slightly worse streamline distribution; its upstream backwater height was slightly larger and its critical submergence was slightly lower, but that still can meet the requirements of the flow measurement in the irrigation area. The plate-column portable flume had a high accuracy that the average relative error of which was only 2.07%, and had the prospect of generalization and application. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 41
Main heading: Flow measurement
Controlled terms: Computer simulation? - ?Experiments? - ?Irrigation? - ?Numerical models? - ?Water
Uncontrolled terms: Average relative error? - ?Critical submergences? - ?Dimensional analysis methods? - ?Hydraulic performance? - ?Plate columns? - ?Portable? - ?Streamline distributions? - ?U-shaped channels
Classification code: 631.1 Fluid Flow, General? - ?723.5 Computer Applications? - ?821.3 Agricultural Methods? - ?901.3 Engineering Research? - ?921 Mathematics
Numerical data indexing: Percentage 2.07e+00%, Size 1.37e-01m to 1.85e-02m
DOI: 10.6041/j.issn.1000-1298.2019.06.037
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
5. Detection Method of Moisture Content of Wheat with Microwave Free-space Measurement
Accession number: 20193907468357
Title of translation:
Authors: Guo, Jiao (1, 2); Duan, Kaiwen (1, 3); Guo, Wenchuan (1, 2)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Key Laboratory for Agricultural Internet of Things, Ministry of Agriculture and Rural Affairs, Yangling; Shaanxi; 712100, China; (3) Key Laboratory of Agricultural Information Perception and Intelligent Services, Yangling; Shaanxi; 712100, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 338-343 and 378
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming to explore a rapid method for detecting content of wheat content, based on microwave free-space measurement, the effects of frequency (1~4 GHz), temperature (10~40), moisture content (11.35%~17.79%) and bulk density (low and high) on the relative dielectric constant of wheat were studied. The factors causing the effect of changes in the relative dielectric constant of wheat were analyzed, the prediction models of wheat moisture content with different frequencies were established, and the model was verified. The experimental results demonstrated that in the frequency range of 1~4 GHz, the relative dielectric constant of wheat was increased with the increase of moisture content, temperature and bulk density of samples, but it was decreased when frequency was increased. Furthermore, all samples were partitioned into calibration set (60 samples) and prediction set (24 samples), the established support vector machine (SVM) model had good performance for the moisture content prediction. Compared with single-frequency and multi-frequency, the prediction model with full-frequency was the best, and the correlation coefficient of prediction, root-mean-square error of prediction and residual prediction deviation were 0.992 9, 0.051 3% and 18.67, respectively. The results indicated that the microwave free-space measurement could be used to detect moisture content of wheat. The research was helpful to develop a new wheat moisture detector which could be used in situ or online detection. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Moisture
Controlled terms: Dielectric properties? - ?Forecasting? - ?Mean square error? - ?Microwave measurement? - ?Moisture determination? - ?Support vector machines
Uncontrolled terms: Correlation coefficient? - ?Different frequency? - ?Free space measurements? - ?Microwave free space measurements? - ?Moisture content predictions? - ?Relative dielectric constant? - ?Root-mean-square error of predictions? - ?Wheat
Classification code: 723 Computer Software, Data Handling and Applications? - ?922.2 Mathematical Statistics? - ?931.2 Physical Properties of Gases, Liquids and Solids? - ?942.2 Electric Variables Measurements? - ?944.2 Moisture Measurements
Numerical data indexing: Frequency 1.00e+09Hz to 4.00e+09Hz
DOI: 10.6041/j.issn.1000-1298.2019.06.039
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
6. Design and Experiment of Microwave-Hot-airflow Vibrating Dryer
Accession number: 20193907468390
Title of translation: -
Authors: Lü, Hao (1); Lü, Huangzhen (2); Wang, Lei (3); Lü, Weiqiao (1); Wan, Li’na (2); Zhao, Dan (2)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China; (3) Hubei Agricultural Machinery Engineering Research and Design Institute, Wuhan; 430070, China
Corresponding author: Lü, Weiqiao(lvweiqiao@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 344-351 and 248
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The non-uniform distribution of microwave field and the non-uniform absorption in fresh food during microwave drying lead to the uneven quality. Combining the advantages of the high efficiency of microwave drying with the uniformity of fluidized drying, water vapor was removed by hot airflow. A microwave-hot-airflow vibrating dryer (MAVD) was developed based on drying uniformity. The MAVD device mainly included a fluidized bed system, a hot air heating system, a microwave heating system, a temperature measurement system and a control system. The positions of magnetron in drying chamber were simulated and optimized with the software of Ansoft HFSS. The results showed that when the height of the tray was constant from the bottom of the box, the positions of the four microwave feed ports were 30 mm away from the original port position, thus the surface electromagnetic field distribution of the material was more uniform. The performance of the device was tested with green soybean. The results showed that the design and control system of the drying test platform were reliable. The drying time of MAVD was 54 min, which was 34.1% shorter than that of microwave fluidized bed drying alone, and the uniformity of products was significantly improved. The research results provided reference for microwave drying equipment to improve the uniformity of microwave heating. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Drying
Controlled terms: Chemical contamination? - ?Control systems? - ?Dryers (equipment)? - ?Electromagnetic fields? - ?Fluidization? - ?Fluidized bed process? - ?Fluidized beds? - ?Heating equipment? - ?Magnetrons? - ?Microwave heating ? - ?Microwaves? - ?Temperature measurement
Uncontrolled terms: Hot airflow? - ?Microwave drying? - ?Simulation? - ?Uniformity? - ?Vibrated bed
Classification code: 701 Electricity and Magnetism? - ?711 Electromagnetic Waves? - ?711.1 Electromagnetic Waves in Different Media? - ?714.1 Electron Tubes? - ?731.1 Control Systems? - ?802.3 Chemical Operations? - ?822.3 Food Products? - ?944.6 Temperature Measurements
Numerical data indexing: Percentage 3.41e+01%, Size 3.00e-02m, Time 3.24e+03s
DOI: 10.6041/j.issn.1000-1298.2019.06.040
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
7. Information Extraction and Driving Factor Assessment of Farmland Abandonment Based on Joint Change Detection
Accession number: 20193907468616
Title of translation:
Authors: Yang, Tong (1, 2); Guo, Xudong (2); Yue, Depeng (1); Wang, Xiaofan (2); Han, Shengqi (1, 2)
Author affiliation: (1) Beijing Key Laboratory of Precision Forestry, Beijing Forestry University, Beijing; 100083, China; (2) Key Laboratory of Land Use, Ministry of Natural Resources, China Land Surveying and Planning Institute, Beijing; 100035, China
Corresponding author: Yue, Depeng(yuedepeng@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 201-208
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The method of remote sensing extraction of abandoned land is mainly classified into image classification and change detection. It is easy to be mixed with grassland and shrub because of the complexity of abandoned land cover types, resulting in the classification method of extraction accuracy is not high. The change detection method is susceptible to the interference of non-cultivated land change factors, and it can only extract new abandonment within the scope of data coverage, but it cannot extract historical abandonment before remote sensing data. In addition, remote sensing data have their limitations, the extracting ability of low and medium-resolution data is insufficient due to the interference of mixed pixels, and the precision of high-resolution remote sensing is vulnerable to the interference of topographic fluctuation, cloud cover and long coverage period. Therefore, it is difficult to extract abandoned land by traditional remote sensing method. To solve the above problems, a joint detection method of multiple source data was proposed to extract abandoned land. Based on the heterogeneity of multi-source data and the complementarity of different methods, different extraction strategies were formulated for different types of abandoned land, and coupling analysis was carried out to extract abandoned land. The field investigation showed that the total accuracy of the method was 97.6%. In addition, data mining for multi-source data and detection results can extract physical and geographical indicators such as “distance feature”, “height difference feature”, “irrigation feature” and “neighborhood feature”, and the significance analysis was helpful to distinguish the dominant factors of abandonment, which provided basis for the study of abandonment driving forces and the directional promotion of abandonment management methods. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Data mining
Controlled terms: Image classification? - ?Remote sensing
Uncontrolled terms: Abandoned land? - ?Change detection? - ?Classification methods? - ?Driving forces? - ?High resolution remote sensing? - ?Multisource data? - ?Remote sensing data? - ?Significance analysis
Classification code: 723.2 Data Processing and Image Processing
Numerical data indexing: Percentage 9.76e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.022
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
8. Research on Limb Motion Command Recognition Technology of Lifting Robot
Accession number: 20193907468490
Title of translation:
Authors: Ni, Tao (1); Zou, Shaoyuan (1); Liu, Haiqiang (1); Huang, Lingtao (1); Chen, Ning (2); Zhang, Hongyan (1)
Author affiliation: (1) College of Mechanical and Aerospace Engineering, Jilin University, Changchun; 130022, China; (2) School of Mechanical and Energy Engineering, Jimei University, Xiamen; 361021, China
Corresponding author: Chen, Ning(cn1972@jmu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 405-411 and 426
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In view of the limited monitoring distance of Kinect for limb recognition, the large zoom network camera was used and CNN-BP fusion network for human behavior recognition was constructed, and the nine groups of robot lifting instructions were trained and identified. Firstly, totally 18 skeleton nodes were extracted based on OpenPose to generate RGB skeleton map and skeleton vector. Then, using the migration learning method, the InceptionV3 network was used to extract the deep abstract features of the image, and the training data set was rotated, translated, scaled and affine. A variety of data enhancement methods were used to extend the training data to prevent overfitting; and then the extracted skeleton vector was extracted from the shallow layer features such as the point line surface using BP neural network; the InceptionV3 network and the BP neural network output were merged and obtained by using the Softmax solver to obtain limb classification results. Finally, the result of limb recognition was input into the robot auxiliary hoisting control system, and the double verification control mode was established to complete the robot auxiliary hoisting operation. The test results showed that the method ensured the timeliness of the model operation, and the real-time recognition accuracy reached 0.99, which greatly improved the long-distance human-computer interaction capability. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Behavioral research
Controlled terms: Backpropagation? - ?Classification (of information)? - ?Cranes? - ?Data mining? - ?Human computer interaction? - ?Motion estimation? - ?Multilayer neural networks? - ?Musculoskeletal system? - ?Robots
Uncontrolled terms: Back propagation neural networks? - ?Classification results? - ?Command recognition? - ?Human behavior recognition? - ?InceptionV3? - ?Limb recognition? - ?OpenPose? - ?Real time recognition
Classification code: 461.3 Biomechanics, Bionics and Biomimetics? - ?693.1 Cranes? - ?716.1 Information Theory and Signal Processing? - ?723.2 Data Processing and Image Processing? - ?723.4 Artificial Intelligence? - ?731.5 Robotics? - ?971 Social Sciences
DOI: 10.6041/j.issn.1000-1298.2019.06.048
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
9. Compensation and Coupling Methods in Impedance Spectroscopy Measurement for Substrate Root Zone
Accession number: 20193907468594
Title of translation:
Authors: Wang, Yongqian (1, 2); Zhao, Pengfei (1, 3); Fan, Lifeng (1, 2); Wang, Ziyang (1, 3); Huang, Lan (1, 3); Wang, Zhongyi (1, 2)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China; (3) Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing; 100083, China
Corresponding author: Wang, Zhongyi(wzyhl@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 288-298
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The root zone of plant provides a base for use of nutrients and water resources and supports the plant, in which the interaction between root and medium affects the uptake of water and nutrients. The technology of impedance spectroscopy can well reflect the dynamic change of water content and root biomass in the root zone. However, there are many factors that limit the application scenarios which can be measured. The research was focused on the problems encountered in the impedance spectroscopy measurement for the substrate root zone under the adjacent excitation strategy within the range of 100 Hz~2 MHz. The solutions were provided and compared. For the effect of the extended fixtures, compensation methods of single-port network and dual-port network were calculated and analyzed. The experimental results supported that the selection of single-port network compensation method was a better strategy for pure substrate impedance measurement, whose process was simple and the compensation result was remarkable. Through lengthening the electrodes, the range of water content in substrate root zone, that ensure the impedance spectroscopy can be accurately measured under natural dry condition, was increased to 11.27% at 8 mm condition from 8.35% at 3 mm, which was 1.35 times of the original range and effectively attenuated the effect of the root zone water content decrease on electrode coupling. And the data differences under different electrode lengths and effect of variations in electrode geometry were analyzed. The results showed that the change in electrode length had no significant impact on the overall trend of the impedance spectroscopy data. Furthermore, the reasons why the negative resistance data appeared in the high frequency range were presented and analyzed. These analysis and resolutions of measurement compensation and coupling problems would provide references for scientific researchers in the impedance study for the root zone. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 40
Main heading: Spectroscopy
Controlled terms: Electrodes? - ?Negative resistance? - ?Nutrients? - ?Substrates? - ?Water resources
Uncontrolled terms: Application scenario? - ?Channel compensation? - ?Compensation method? - ?Electrode couplings? - ?Electrode geometries? - ?Impedance spectroscopy? - ?Impedance spectroscopy measurements? - ?Network compensation
Classification code: 444 Water Resources
Numerical data indexing: Percentage 1.13e+01%, Percentage 8.35e+00%, Size 3.00e-03m, Size 8.00e-03m
DOI: 10.6041/j.issn.1000-1298.2019.06.033
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
10. Type Synthesis and Classification of Space Curve Translation Parallel Mechanisms
Accession number: 20193907468589
Title of translation:
Authors: Ye, Meiyan (1, 2); Shi, Zhixin (1); Luo, Yufeng (1, 3)
Author affiliation: (1) School of Mechanical and Electronic Engineering, Nanchang University, Nanchang; 330031, China; (2) School of Science, Nanchang University, Nanchang; 330031, China; (3) School of Mechatronics and Vehicle Engineering, East China Jiaotong University, Nanchang; 330013, China
Corresponding author: Shi, Zhixin(shizhixin@ncu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 397-404
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Topological structure synthesis is the most original part of mechanical system design. Aiming at the problems in the existing theories on type synthesis of robot mechanisms, such as incompleteness of synthesis results, inapplicability to bending translation mechanisms and so on, the method of type synthesis and classification for parallel mechanisms with bending translation motion characteristic was proposed. First of all, lines, curves, planes and surfaces were regarded as independent spaces based on the Gauss non-Euclidean intrinsic geometry, which can be used to describe the translation characteristics of the end-effector. Then a motion characteristic model of bending translation was established, which included motion type (translation and rotation), motion direction, dimension and overall geometric shape of motion space. Secondly, the forming mechanism of bending translation was studied, and the relevant operation rules of bending translation motion characteristics were formulated, which made the intersection of all limbs’ motion characteristics for parallel mechanism relatively straightforward and simple. After that, according to the geometric morphological features of space curves, the space curve translation mechanisms can be divided into nine basic types. Finally, the method of type synthesis for space curve translation mechanisms was illustrated by two examples, and the complete procedures for structural synthesis of cylinder-cylinder intersection line translation mechanism and cylinder-cone intersection line translation mechanism were shown by using this method. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Bending (forming)
Controlled terms: Cylinders (shapes)? - ?Formal logic? - ?Machine design? - ?Mechanisms
Uncontrolled terms: Mechanical systems? - ?Morphological features? - ?Motion characteristics? - ?Parallel mechanisms? - ?Structural synthesis? - ?Topological structure? - ?Translation motion? - ?Type synthesis
Classification code: 535.2 Metal Forming? - ?601 Mechanical Design? - ?601.3 Mechanisms? - ?721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI: 10.6041/j.issn.1000-1298.2019.06.047
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
11. Indoor Positioning Tracking Algorithm of Wireless Sensor Network Based on K-OPLS
Accession number: 20193907468460
Title of translation: K-OPLS
Authors: Li, Jun (1); Hou, Xinyan (1)
Author affiliation: (1) School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 265-271 and 298
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: For the wireless sensor network based on fingerprint indoor positioning, an indoor positioning algorithm based on kernel-based orthogonal projection to latent structures (K-OPLS) was proposed. O-PLS was a universal linear multivariate data modeling algorithm, which can remove the irrelevant components in the input and output, that was, eliminating the variation components from the description variable (input) that were orthogonal to the response variable (output). Under the model framework of O-PLS, the ‘kernel trick’ was applied by the K-OPLS algorithm to map the description variable to the high-dimensional feature space, and the nonlinear relation between the description and response variables was given, so as to achieve the calculation of the predictive component of the model and the response-orthogonal component. Therefore, the essence of K-OPLS algorithm was to integrate the kernel partial least square modeling and orthogonal signal correction preprocessing method, which can effectively improve the performance of the model and enhance the interpretation of the model to some extent. Based on RSSI fingerprint information, the K-OPLS algorithm can achieve the indoor localization tracking for WSNs by building the nonlinear mapping relation between anchor node and non-anchor node in the reference position. The proposed algorithm was applied to different examples in the simulation and physical environment. Under the same conditions, it was also compared with other kernel-based learning algorithm, such as kernel ridge regression (KRR), kernel extreme learning machine (KELM), kernel signal to noise ratio (KSNR), kernel partial least squares (KPLS), and kernel adaptive filtering etc. In the simulation experiment, the tracking error of the WK-OPLS algorithm based on wavelet kernel was 0.232 6 m and 1.320 5 m, respectively, in no-noise and noisy environments. In physical experiments, the tracking error of the algorithm based on wavelet kernel was 0.249 3 m. The experimental results showed that the proposed algorithm not only improved the positioning accuracy effectively, but also had a certain ability to remove noise. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Machine learning
Controlled terms: Adaptive filtering? - ?Adaptive filters? - ?Indoor positioning systems? - ?Learning algorithms? - ?Least squares approximations? - ?Regression analysis? - ?Sensor nodes? - ?Signal to noise ratio? - ?Surface discharges? - ?Wireless sensor networks
Uncontrolled terms: High-dimensional feature space? - ?Indoor positioning? - ?Kernel based learning algorithm? - ?Kernel methods? - ?Kernel partial least square (KPLS)? - ?Kernel partial least squares? - ?Kernel ridge regression (KRR)? - ?Orthogonal projection
Classification code: 701.1 Electricity: Basic Concepts and Phenomena? - ?716.1 Information Theory and Signal Processing? - ?716.3 Radio Systems and Equipment? - ?722 Computer Systems and Equipment? - ?722.3 Data Communication, Equipment and Techniques? - ?921.6 Numerical Methods? - ?922.2 Mathematical Statistics
DOI: 10.6041/j.issn.1000-1298.2019.06.030
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
12. CAN Bus Architecture Design and Test of Combine Harvester
Accession number: 20193907468505
Title of translation: CAN
Authors: Jiang, Jiandong (1); Sun, Yuanfang (1); Jin, Xiao (1); Zhou, Qian (1); Mao, Zhilin (2)
Author affiliation: (1) Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Thinker Agricultural Machinery Co., Ltd., Huzhou; 313017, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 93-99
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming at the intelligent development of agricultural machinery and equipment at home and abroad and the remote network control requirements of equipment and materials, based on ISO 11783 agricultural machine CAN bus standard, the intelligent harvesting CAN bus program and its application system were proposed and designed. According to the operation characteristics and intelligent control requirements of the combine harvester, a modular and expandable intelligent agricultural CAN bus network structure, consisting of a power CAN bus, a device management CAN bus, a dedicated device CAN bus 1 and a dedicated device CAN bus 2 was established. Based on the ISO 11783 CAN bus application layer protocol standard, an intelligent remote harvester remote network control communication protocol was developed. Finally, the network load and real-time communication experiment of CAN bus application system of intelligent combine harvester and the engineering application experiment were carried out. The results showed that at the baud rate of 500 kb/s, the load of all buses was less than 30%, and the data transmission delay between the three layers CAN buses was less than 1ms, which fully met the design requirements of the intelligent remote network-controlled CAN bus system of combine harvester. In engineering applications, it also met the automatic navigation communication requirements of harvesters. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Combines
Controlled terms: Agriculture? - ?Application programs? - ?Harvesters? - ?ISO Standards? - ?Network architecture
Uncontrolled terms: Application layer protocols? - ?Architecture designs? - ?CAN bus? - ?Combine harvesters? - ?Data transmission delay? - ?Engineering applications? - ?Operation characteristic? - ?Real-time communication
Classification code: 723 Computer Software, Data Handling and Applications? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control? - ?821.1 Agricultural Machinery and Equipment
Numerical data indexing: Percentage 3.00e+01%, Time 1.00e-03s
DOI: 10.6041/j.issn.1000-1298.2019.06.010
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
13. Evaluation and Optimization of Border Irrigation Performance in Hetao Irrigation District
Accession number: 20193907468338
Title of translation:
Authors: Fan, Leilei (1); Shi, Haibin (1); Li, Ruiping (1); Miao, Qingfeng (1); Sun, Na (1); Wang, Yanming (2)
Author affiliation: (1) College of Water Conservation and Civil Engineering, Inner Mongolia Agricultural University, Huhhot; 010018, China; (2) Ulan Buh Irrigation Area Administration, Bayannur; 015200, China
Corresponding author: Li, Ruiping(nmglrp@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 315-321 and 337
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Irrigation performance in fields is an important factor for the yield and water use efficiency of crops. For the unreasonable field size in Hetao Irrigation District, the flow and performance change of irrigation water in fields were analyzed by irrigation experiments in different widths of fields in order to find proper technical factors of irrigation water in fields by model simulation and regression analysis. Results showed that the irrigation performance was poor with irrigation uniformity of only 59.78%~77.40% and 84.61%~87.02% when the width of fields was 18~23 m. Although water storage efficiency was 100%, the irrigation performance was still poor. When the width of fields was reduced to be 10~15 m, the irrigation efficiency was 70.20%~87.00% and irrigation uniformity was 86.77%~90.80%, which showed best irrigation performance. When the width of fields was reduced to be 5 m, the irrigation performance was deteriorated. A single objective optimization model included irrigation efficiency and irrigation uniformity and storage efficiency combined with the field experiment data was constructed through the combination of model simulation, uniform experiment design and multiple regression analysis. Through using the single wide flow and irrigation time as decision variables and solving the model by bubble sort method, the optimal combination of technical components of border irrigation was obtained, and the appropriate width of the field was further determined based on the actual flow in the demonstration area. The results provided theoretical support for the water-saving transformation design, effective utilization of water resources and agricultural sustainable development in irrigated areas. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Irrigation
Controlled terms: Digital storage? - ?Efficiency? - ?Optimization? - ?Regression analysis? - ?Water conservation? - ?Water resources? - ?Water supply
Uncontrolled terms: Border irrigation? - ?Hetao irrigation districts? - ?Irrigation efficiency? - ?Irrigation performance? - ?Multiple regression analysis? - ?Single objective optimization? - ?Transformation designs? - ?Uniform experiment designs
Classification code: 444 Water Resources? - ?446.1 Water Supply Systems? - ?722.1 Data Storage, Equipment and Techniques? - ?821.3 Agricultural Methods? - ?913.1 Production Engineering? - ?921.5 Optimization Techniques? - ?922.2 Mathematical Statistics
Numerical data indexing: Percentage 1.00e+02%, Size 1.00e+01m to 1.50e+01m, Size 1.80e+01m to 2.30e+01m, Size 5.00e+00m
DOI: 10.6041/j.issn.1000-1298.2019.06.036
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
14. Identification of Ecosystems Based on Vegetation Indices Selection Algorithm and Decision Tree
Accession number: 20193907468492
Title of translation:
Authors: Sun, Binfeng (1, 2); Zhao, Hong (3); Chen, Licai (1, 2); Shu, Shifu (1, 2); Ye, Chun (1, 2); Li, Yanda (1, 2)
Author affiliation: (1) Institute of Agricultural Engineering, Jiangxi Academy of Agricultural Sciences, Nanchang; 330200, China; (2) Jiangxi Engineering Research Center for Information Technology in Agriculture, Nanchang; 330200, China; (3) Jiangxi Transportation Institute, Nanchang; 330200, China
Corresponding author: Li, Yanda(liyanda2008@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 194-200
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Vegetation indices can reflect the spectral characteristics of different ecosystems and render remote sensing images easier to interpret, which are widely used to identify the ecosystem distribution patterns. A vegetation index is a specific expression for describing green vegetation, and its effects are inconsistent in different environments. The selection of a vegetation index needs to be combined with the characteristics of the application environment. Currently, selection of vegetation index is mainly based on the physical meaning of a vegetation index, which disregards its adaptability in the study area and leads to inconsistent research results. The correlation coefficients between vegetation indices were integrated into the vegetation indices selection algorithm based on Mahalanobis distance, and then a decision tree model was constructed based on the most suitable vegetation indices of the research area which were determined according to the selected samples. Taking Yongfeng County of Jiangxi Province as an example, it was attempted to identity the distribution pattern of ecosystems. Using this method, the ecosystems needed to be extracted were firstly determined and the relationship between ecosystems and decision tree nodes was established. Then, six different surface features, including wetlands, forests, grasslands, farmlands, urban and bare land, were classified. The overall accuracy of identification by the method was 89.11%, which was higher than that of the traditional methods. Taking wetlands as an example, the classification accuracy of vegetation indices determined by the vegetation selection algorithm was 91.62%, which was higher than the common vegetation indices that had an accuracy of 87.60%. The results indicated that the vegetation indices selection algorithm developed was applicable and effective. The method was a valuable and applicable tool for the extraction of regional ecosystem types and ecosystem management. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 30
Main heading: Ecosystems
Controlled terms: Automation? - ?Decision trees? - ?Remote sensing? - ?Vegetation? - ?Wetlands
Uncontrolled terms: Automatic identification? - ?Correlation coefficient? - ?Decision tree modeling? - ?Mahalanobis distances? - ?Vegetation index
Classification code: 454.3 Ecology and Ecosystems? - ?731 Automatic Control Principles and Applications? - ?961 Systems Science
Numerical data indexing: Percentage 8.76e+01%, Percentage 8.91e+01%, Percentage 9.16e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.021
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
15. Maize Leaf Area Index Measurement Based on Vehicle 3D LiDAR
Accession number: 20193907468517
Title of translation:
Authors: Zhang, Man (1); Miao, Yanlong (1); Qiu, Ruicheng (1); Ji, Yuhan (1); Li, Han (2); Li, Minzan (1)
Author affiliation: (1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing; 100083, China
Corresponding author: Li, Minzan(limz@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 12-21
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Leaf area index (LAI) is an important crop phenotyping parameter and an important indicator of crop growth and yield. Using vehicle-mounted three-dimensional (3D) LiDAR, crop morphological parameters such as plant height and LAI can be quickly obtained. Maize was taken as the research object, and a method of calculating LAI based on the ratio of the number of stratified point clouds or the number of stratified point clouds to the number of ground point clouds was proposed by using the data of three-dimensional LiDAR point clouds in vehicle. 3D point cloud data of Jingnongke 728 and Nongda 84 were obtained by vehicle platform. Firstly, the point cloud data were preprocessed to obtain the point cloud data of the measured LAI true value region. Secondly, the point cloud of maize plant and the ground point cloud were segmented. According to the fluctuation degree of the ground, the distance threshold of random sample consensus’s plane model was set to be 0.06 m. then according to the vertical structure distribution of maize, the maize plants were divided into high, middle and lower layers, and each layer was calculated. The number of clouds was marked as H, M and L, respectively. At the same time, the ratio of the number of point clouds in each layer of high, middle, and lower layers to the number of ground point clouds was marked as Hr, Mr and Lr. Finally, the linear regression models of the true values of H, M, L and Hr, Mr, Lr and LAI were established respectively. The experimental results showed that the LAI binary linear regression measurement model established by Hr and Mr variables was the best. The R2 of Jingnongke 728 training set was 0.931, the verification set R2 was 0.949, the R2 of Nongda 84 training set was 0.979, and the verification set R2 was 0.984. The research result provided a solution for rapid measurement in the LAI field. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Optical radar
Controlled terms: Crops? - ?Plants (botany)? - ?Regression analysis? - ?Thermal stratification? - ?Vehicles
Uncontrolled terms: Binary linear regression? - ?Crop growth and yields? - ?Leaf Area Index? - ?Linear regression models? - ?Maize? - ?Morphological parameters? - ?Random sample consensus? - ?Three-dimensional lidars
Classification code: 716.2 Radar Systems and Equipment? - ?821.4 Agricultural Products? - ?922.2 Mathematical Statistics
Numerical data indexing: Size 6.00e-02m
DOI: 10.6041/j.issn.1000-1298.2019.06.002
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
16. Design and Analysis of Self-adaptability in Banana Crown-cutting Device Based on Constant-force Mechanism
Accession number: 20193907468326
Title of translation:
Authors: Yang, Zhou (1); Guo, Jie (1); Jin, Mohui (1); Duan, Jieli (2); Fu, Han (1); Xu, Zeyu (1)
Author affiliation: (1) College of Engineering, South China Agricultural University, Guangzhou; 510642, China; (2) Engineering Fundamental Teaching and Training Center, South China Agricultural University, Guangzhou; 510642, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 148-155
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming to solve the problem of poor adaptability in the process of mechanized banana crown-cutting, an adaptable banana crown-cutting device by stalk-surrounding and insert-cutting was designed, which was based on constant-force mechanism, and the radial adaptability and rotational adaptability of banana crown-cutting device were analyzed. A constant-force mechanism was introduced in the device, including two oblique compression springs provided negative stiffness and one horizontal compression spring provided positive stiffness, which enhanced the radial adaptability of the device. The force-displacement characteristic curves and stiffness-displacement characteristic curves of the constant-force mechanism were analyzed and the key parameters were also optimized. The stiffness coefficient of oblique spring in the constant-force mechanism was 12 N/mm and the stiffness coefficient of horizontal spring was 3 N/mm. In the initial state, the inclination angle of the oblique spring was 36.87°. The diameter of the enveloping circle was 80~100 mm when the device was in constant force state, meanwhile, the constant force was 180 N. Based on the Hooke hinge, reversible cutting platforms that can release two free rotational degrees were designed. The cutting platforms’ rotational angle was set as ±10°, according to the curvature of banana stalks. According to the geometric parameters of the established 3D model, the working space at the end of the cutter was a spherical surface with a radius of 300 mm. The flexibility matrix of the cutter-end was analyzed. The result showed that when the rotational angle of the cutting platform was 0°, the flexibility of the cutter-end was the largest and the maximum value was 0.818 2 mm/N, and when the rotational angle of the cutting platform was 10°, the flexibility of the cutter-end was the smallest and the minimum value was 0.77 mm/N. The results showed that the flexibility of the cutter-end was decreased gradually when the cutting platforms’ reversal angle became bigger. The tests showed that 81.25% of samples fulfilled requirements, the quality of the incisions were good. The machine, which was reasonably designed, fulfilled the requirements of banana crown-cutting. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Fruits
Controlled terms: 3D modeling? - ?Curve fitting? - ?Stiffness
Uncontrolled terms: Constant force mechanisms? - ?Displacement characteristic? - ?Flexibility analysis? - ?Flexibility matrices? - ?Force-displacement characteristics? - ?Self-adaptability? - ?Spring mechanism? - ?Stiffness coefficients
Classification code: 821.4 Agricultural Products? - ?921.6 Numerical Methods? - ?951 Materials Science
Numerical data indexing: Force 1.80e+02N, Percentage 8.12e+01%, Size 3.00e-01m, Size 8.00e-02m to 1.00e-01m, Surface_Tension 1.20e-02N*m, Surface_Tension 3.00e-03N*m
DOI: 10.6041/j.issn.1000-1298.2019.06.016
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
17. Evaluation of Spatial Elasticity of Landscape in Typical Grassland Nature Reserve by GIS
Accession number: 20193907468493
Title of translation: GIS
Authors: Zhao, Fangbo (1); Yue, Depeng (1); Yang, Xiaoxiao (1); Yu, Qiang (1); Su, Kai (1); Qu, Zhiqiang (2)
Author affiliation: (1) College of Forestry, Beijing Forestry University, Beijing; 100083, China; (2) College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Huhhot; 010011, China
Corresponding author: Yue, Depeng(yuedepeng@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 209-217
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to understand the effect of grassland vegetation restoration and understand the elastic characteristics of grassland ecosystem, Xilin Gole League Grassland National Nature Reserve was taken as the object, supported by ArcGIS, Fragstats and other software, a conceptual landscape spatial elasticity model (LSR) was established from three factors: landscape pattern stability (LPS), landscape ecological sensitivity (LES) and human disturbance, and the landscape spatial ecological sensitivity and resistance characteristics of the study area were analyzed and evaluated. The results showed that the stability of forest and grassland landscape pattern was higher at the class level, especially in the core zone,but the LPS value was far lower than the theoretical optimal value, and the stability level of landscape pattern needed to be improved. The ecological sensitivity of nearly 60% of the protected areas was moderately sensitive, and the majority of the core zones and their buffer zones were at the medium and high sensitivity level, and the ratio of the highly sensitive areas from the core zones to the buffer zones showed an increasing trend. Due to the dual effects of natural and man-made activities, the area ratio of low-elasticity areas below the moderate level in the whole nature reserve was over 70%, from core zone to external experimental zone, the range of extremely low resistance space was increasing, and vegetation restoration should be strengthened in more than 60% of protected areas. According to the spatial resistance of landscape, 10.53% of the areas needed to be protected, which was distributed in the eastern part of the protected functional zone C, northwestern part of zone E and the intersection of the zone D and zone E. The landscape spatial resistance framework and its conceptual model can comprehensively consider the stability and ecological sensitivity of the landscape pattern, and had positive guidance for evaluating and recognizing the landscape spatial resistance characteristics of grassland natural reserves, formulating grassland vegetation restoration plan and optimizing protection function areas. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Vegetation
Controlled terms: Conservation? - ?Ecosystems? - ?Elasticity? - ?Environmental protection? - ?Geographic information systems? - ?Restoration? - ?Stability
Uncontrolled terms: Ecological sensitivity? - ?Elastic characteristic? - ?Grassland? - ?Grassland ecosystems? - ?Grassland vegetation? - ?Natural reserves? - ?Resistance characteristics? - ?Vegetation restoration
Classification code: 454.2 Environmental Impact and Protection? - ?454.3 Ecology and Ecosystems? - ?903.3 Information Retrieval and Use
Numerical data indexing: Percentage 1.05e+01%, Percentage 6.00e+01%, Percentage 7.00e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.023
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
18. Effect of Different Motion Forms of Vibrating Screen on Screening of Particle Group
Accession number: 20193907468397
Title of translation:
Authors: Wang, Lijun (1); Cui, Youqiang (1); Zheng, Zhaohui (1); Feng, Xin (1); Shen, Baoshan (2); Li, Yibo (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) The 852 Farm of Heilongjiang Agricultural Reclamation, Shuangyashan; 155600, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 119-129
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming to determine the screening performance of the vibration screen with different motion forms, the dispersion of particles on the plane reciprocating vibration screen, the vibration screen with three translations and one swing, and the vibration screen with three translations and two rotations were studied. Based on the nonlinear law of particle moving, the movements of particles on different screens with different motions were simulated by Matlab. The dispersity was taken as the experimental index. The motions of maize particles on three kinds of vibrating plate were tracked by high speed camera. The motion law of the particles on the vibration plate verified the correctness of the results of nonlinear law of particle moving based on theoretical analysis. The dispersity of the particles on the three kinds of vibration plates was increased firstly and then decreased with the increase of the spindle speed of the vibrating screen. At optimum rotating speed of the main shaft of the vibrating screen, the comprehensive dispersion of the maize particle group on the vibration plate with three translations and one swing and the vibration plate with three translations and two rotations were respectively 38.96 mm and 40.73 mm, which were 14.39% and 19.58% higher than that of the plane reciprocating vibration plate. The screening efficiency was taken as test index, and vibrating screens with three kinds of motions were tested for screening material. The results of material screening test showed that the screening efficiency of particle group on three kinds of vibrating screens from high to low was: the vibration screen with three translations and two rotations, the vibration screen with three translations and one swing and plane reciprocating vibrating screen. The results of material screening test verified the feasibility of studying the dispersion of particle group by using the vibrating plate and the correctness of the results. The research results provided references for the analysis of screening performance of the vibration screen with different motion forms and the design and application of the new vibration screen. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Vibration analysis
Controlled terms: Charged particles? - ?Dispersion (waves)? - ?Dispersions? - ?Efficiency? - ?High speed cameras? - ?Particle beam dynamics? - ?Particle separators? - ?Vibrating screens
Uncontrolled terms: Design and application? - ?Material screening? - ?Particle groups? - ?Research results? - ?Screening efficiency? - ?Screening performance? - ?Vibrating plate? - ?Vibration screen
Classification code: 605.1 Small Tools, Powered? - ?742.2 Photographic Equipment? - ?913.1 Production Engineering? - ?932.1 High Energy Physics? - ?951 Materials Science
Numerical data indexing: Percentage 1.44e+01%, Percentage 1.96e+01%, Size 3.90e-02m, Size 4.07e-02m
DOI: 10.6041/j.issn.1000-1298.2019.06.013
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
19. Effect of Dissolved Oxygen Content of Oxygenated Brackish Water on Soil Water and Salt Transport
Accession number: 20193907468467
Title of translation:
Authors: Sun, Yan (1); Zhu, Mengjie (1); Wang, Quanjiu (1, 2); Zhang, Jihong (1)
Author affiliation: (1) State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an; 710048, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling; Shaanxi; 712100, China
Corresponding author: Wang, Quanjiu(wquanjiu@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 299-305
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The distribution of salt and water and the parameters of infiltration model under the condition of oxygenated brackish water were investigated, and micro-nanobubble rapid generation device was used to carry out different oxygenated levels treatment to brackish water. The results showed that under the condition of different dissolved oxygen infiltration in brackish water, when the infiltration time was the same, the cumulative infiltration and the wetting front depth were increased first and then decreased with the dissolved oxygen amount, and when the dissolved oxygen content of brackish water was 14.0 mg/L, the cumulative infiltration and the depth of wet front were maximum. Compared with other treatments, infiltration conditions with dissolved oxygen content of 14.0 mg/L in brackish water could accelerate water infiltration and increase soil moisture content. In addition, compared with the treatment without the addition of oxygen, infiltration of different oxygen levels could improve the desalination efficiency of irrigation water. The fitting effect of algebraic model was better than that of PHILIP model under the condition of oxygenated brackish water. In the PHILIP model, with the increase of dissolved oxygen in brackish water, the permeation rate was increased first and then decreased, and the maximum appeared at 14.0 mg/L. In the algebraic model, the comprehensive shape factor showed the opposite law, and the minimum value appeared at 14.0 mg/L, the algebraic model was able to fit the soil moisture content under one-dimensional vertical infiltration conditions of oxygenated brackish water. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Dissolved oxygen
Controlled terms: Algebra? - ?Biochemical oxygen demand? - ?Desalination? - ?Dissolution? - ?Infiltration? - ?Irrigation? - ?Moisture determination? - ?Soil moisture? - ?Water treatment
Uncontrolled terms: Brackish water? - ?Dissolved oxygen contents? - ?Infiltration characteristic? - ?Infiltration modeling? - ?Water and salts
Classification code: 445.1 Water Treatment Techniques? - ?483.1 Soils and Soil Mechanics? - ?802.3 Chemical Operations? - ?821.3 Agricultural Methods? - ?921.1 Algebra? - ?944.2 Moisture Measurements
Numerical data indexing: Mass_Density 1.40e-02kg/m3
DOI: 10.6041/j.issn.1000-1298.2019.06.034
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
20. Transmission Characteristics of Dual-motor Coupling System for Electric Tractors
Accession number: 20193907468519
Title of translation:
Authors: Li, Tonghui (1); Xie, Bin (1); Song, Zhenghe (1); Li, Ji (1)
Author affiliation: (1) Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing; 100083, China
Corresponding author: Xie, Bin(xiebincau@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 379-388
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: When the traditional single motor driven electric tractors were plowing and rotary tillage, the driving motor was often in the low efficiency area. The power of the motor cannot be fully utilized, which leads to the reduction of working time of tractor. Compared with the single-motor driving system, the dual-motor driving system has some advantages, including the operating point of the two motors can be adjusted to optimize the efficiency of the driving system. It can reduce the torque capacity of the single motor, improve the power density of the driving system, and increase the energy efficiency of the tractor under different operating conditions. Firstly, the structure and working principle of the dual-motor coupling driving system for electric tractors were proposed, including single-motor mode and dual-motor mode. According to the proposed structure, combined with the transmission characteristics of the planetary gear mechanism, the driving mode of the dual motors coupled driving system was analyzed and calculated. Secondly, the mathematical model of powertrain for electric tractor was established. On this basis, the simulation test model for electric tractor was built. The coordinated control strategy of the dual motors driving system was designed, and the power distribution rules of the two motors were obtained by simulation test, the simulation results showed that the power distribution ratio of two motors was between 1.31 and 2.62. Finally, a transmission test platform was built and tested under constant load and traction performance was done. The result demonstrated that under the two load conditions, the power distribution ratio of two motors was ranged from 1.07 to 2.73. In constant load test, the system efficiency was the highest when the power distribution ratio was 1.88. When the power distribution ratio was 1.85, the system efficiency was the highest in traction performance test. The dual motors driving system could realize the power distribution of the two motors according to the power distribution rules, which met the working load and reduced the power loss at the same time. Therefore, selecting the corresponding driving modes according to the different working conditions can improve the efficiency of the driving system. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Electric power distribution
Controlled terms: Automobile testing? - ?Energy efficiency? - ?Load testing? - ?Metal drawing? - ?Traction (friction)? - ?Traction motors? - ?Tractors (agricultural)? - ?Tractors (truck)
Uncontrolled terms: Coordinated control strategy? - ?Different operating conditions? - ?Dual-motors? - ?Electric tractors? - ?Planetary gear mechanism? - ?Planetary Gears? - ?Power distributions? - ?Transmission characteristics
Classification code: 525.2 Energy Conservation? - ?535.2 Metal Forming? - ?662 Automobiles and Smaller Vehicles? - ?663.1 Heavy Duty Motor Vehicles? - ?706.1.2 Electric Power Distribution? - ?931.1 Mechanics
DOI: 10.6041/j.issn.1000-1298.2019.06.045
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
21. Effect of Water Addition on Hydration and Structure of Gluten Protein
Accession number: 20193907468436
Title of translation:
Authors: Xie, Xinhua (1); Wu, Xiuyuan (1); Shen, Yue (1); Zhang, Bei (1); Xu, Chao (1); Zhang, Yanjie (1)
Author affiliation: (1) College of Food Science and Technology, Henan Agricultural University, Zhengzhou; 450002, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 365-370
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Effect of water addition ongluten protein was investigated by using nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FITR), differential scanning calorimeter (DSC) and rotational rheometer (DHR). The results showed that the amount of water had a significant effect on the hydration, structure and functional properties of gluten protein. With the increase of water addition, the bound water content of gluten protein was decreased significantly from 22.42% to 17.27%, the free water content was increased significantly from 0.04% to 8.25%, and the weakly bound water content was increased first and then decreased, and the water was preferentially converted into bound water and weakly bound water. The gluten protein network had more dense pores and smaller pore size, but when the water was added more than 160%, the strength of the network was weakened. The secondary structure of gluten protein showed that when the water addition amount was not more than 130%, the β-turn angle and the random curl was decreased significantly with the increase of water addition, and the α-helix and β-folding were increased remarkably. When the water addition amount was more than 130%, the secondary structure change of gluten protein was slowed down, and there was no obvious changing rule. The heat denaturation temperature of the protein was firstly increased and then decreased. When the water addition amount reached 150%, the maximum value was 82.4, indicating that the thermodynamic stability was increased with the increase of water. The storage modulus G’ and the loss modulus G” of gluten protein all showed a downward trend. After the water addition was more than 130%, the downward trend was slowed down. When the water content was 150%, the elasticity was higher than 140%. The above results indicated that 150% may be the better water content of gluten protein, which also laid a foundation for further revealing the mechanism of water addition to wheat dough. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Proteins
Controlled terms: Differential scanning calorimetry? - ?Fourier transform infrared spectroscopy? - ?Hydration? - ?Nuclear magnetic resonance? - ?Nuclear magnetic resonance spectroscopy? - ?Pore size? - ?Scanning electron microscopy? - ?Water supply systems
Uncontrolled terms: Differential scanning calorimeters? - ?Functional properties? - ?Gluten protein? - ?Nuclear magnetic resonance(NMR)? - ?Protein structures? - ?Rheological property? - ?Rotational rheometer? - ?Water distributions
Classification code: 446.1 Water Supply Systems? - ?801 Chemistry? - ?804.1 Organic Compounds? - ?944.6 Temperature Measurements? - ?951 Materials Science
Numerical data indexing: Percentage 1.30e+02%, Percentage 1.40e+02%, Percentage 1.50e+02%, Percentage 1.60e+02%, Percentage 2.24e+01% to 1.73e+01%, Percentage 4.00e-02% to 8.25e+00%
DOI: 10.6041/j.issn.1000-1298.2019.06.043
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
22. Stiffness Analysis and Structure Optimization of Shunted Sensor with Flexure Hinge
Accession number: 20193907468293
Title of translation:
Authors: Wang, Yongli (1); Lu, Yi (1)
Author affiliation: (1) College of Mechanical Engineering, Yanshan University, Qinhuangdao; 066004, China
Corresponding author: Lu, Yi(luyi@ysu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 419-426
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: For the disadvantages of existing six-dimensional force sensor, a new shunted sensor with three rigid compliant hybrid limbs and six standard force sensors was designed and manufactured based on parallel structure for measuring the heavy six-component force/torque. Firstly, a prototype of the developed parallel sensor was built up and its merits were analyzed. A 3D model of the robot hybrid hands with parallel sensor was constructed. A statics equation among the forces of the six standard force sensors and the external workload was established, and a mapped matrix from the workload to forces of the six standard force sensors was derived based on its equivalent parallel mechanism. The theoretical solutions of the parallel sensor stiffness were obtained and verified by the simulation solutions of a FE model. Secondly, structural optimum design of the sensor was carried out based on the genetic algorithm. The best structural parameters of sensor were obtained by analyzing isotropy. Finally, an experiment was performed to obtain the accuracy in each direction by loading weights. The forces of the six standard force sensors of the prototype of parallel sensor were measured by adding different workload components onto the prototype loading platform. The results indicated that the maximun error in each direction of sensor was 1.05% in full scale. The theoretical analysis was verified by finite element method simulating and experimental results. The force/torque of the parallel sensor can be accurately measured under the given external load. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Structural optimization
Controlled terms: 3D modeling? - ?Genetic algorithms? - ?Hinges? - ?Mechanisms? - ?Rigid structures? - ?Stiffness? - ?Structural design
Uncontrolled terms: Accuracy? - ?Optimum designs? - ?Six-dimensional force? - ?Structural deformation? - ?Structural optimum design? - ?Structural parameter? - ?Structure optimization? - ?Theoretical solutions
Classification code: 408 Structural Design? - ?408.1 Structural Design, General? - ?601.3 Mechanisms? - ?921.5 Optimization Techniques? - ?951 Materials Science
Numerical data indexing: Percentage 1.05e+00%
DOI: 10.6041/j.issn.1000-1298.2019.06.050
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
23. Identification of Rice with Different Storage Time Based on Color-sensitive Sensor Array Combined with Visible-near-infrared Spectroscopy
Accession number: 20193907468497
Title of translation:
Authors: Lin, Hao (1); Wang, Zhuo (1); Chen, Quansheng (1); Lin, Jinjin (1)
Author affiliation: (1) School of Food and Biological 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: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 359-364
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Rice is gradually aged during transportation and storage, and its degree of aging is an important factor affecting the quality of rice. A color-sensitive sensor array (CSA) combined with visible-near-infrared spectroscopy system was used to identify rice in different storage periods. Rice samples were stored under constant temperature and humidity conditions and divided into five groups according to different storage periods (0 month, 1 month, 2 months, 4 months and 6 months). CSA was made of three boron-dipyrromethene (BODIPY) dyes to capture the volatile organic compounds. After reacting with volatile organic compounds of rice in different storage periods, the spectral data of the color sensitive materials were separately extracted by the detection system. The optimal spectral range of the three types of spectral data was extracted using the Si-PLS algorithm. After the spectral interval data fusion, the characteristic spectral variables were extracted by genetic algorithm (GA), no information variable elimination method (UVE) and ant colony algorithm (ACO), respectively. Pattern recognition was performed by using principal component analysis (PCA) and linear discriminant analysis (LDA). The results showed that the LDA prediction model established by Si-PLS-UVE extracted spectral variables had the highest recognition rate. When the number of PCs was 9, the correct recognition rate of the calibration set and prediction set was 98% and 96%. The research result provided a viable method for detecting rice storage time. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Digital storage
Controlled terms: Ant colony optimization? - ?Color? - ?Data fusion? - ?Data mining? - ?Dies? - ?Discriminant analysis? - ?Genetic algorithms? - ?Infrared devices? - ?Near infrared spectroscopy? - ?Pattern recognition ? - ?Principal component analysis? - ?Spectrum analysis? - ?Storage (materials)? - ?Volatile organic compounds
Uncontrolled terms: Ant colony algorithms? - ?Boron dipyrromethene? - ?Constant temperature? - ?Linear discriminant analysis? - ?Rice? - ?Sensitive sensors? - ?Storage time? - ?Visible-near infrared spectroscopy
Classification code: 534.1 Foundries? - ?694.4 Storage? - ?722.1 Data Storage, Equipment and Techniques? - ?723.2 Data Processing and Image Processing? - ?741.1 Light/Optics? - ?804.1 Organic Compounds? - ?921.5 Optimization Techniques? - ?922 Statistical Methods? - ?922.2 Mathematical Statistics
Numerical data indexing: Age 0.00e+00yr, Age 1.67e-01yr, Age 3.33e-01yr, Age 5.00e-01yr, Age 8.33e-02yr, Percentage 9.60e+01%, Percentage 9.80e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.042
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
24. Unsteady Flow Characteristics of Tip Clearance in Semi-open Impeller Centrifugal Pump
Accession number: 20193907468420
Title of translation:
Authors: Lu, Jinling (1); Guo, Lei (1); Wang, Like (1); Wang, Wei (1); Guo, Pengcheng (1); Luo, Xingqi (1)
Author affiliation: (1) Faculty of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an; 710048, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 163-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Transient pulsation of tip leakage vortex is an important factor for flow instability and stall of centrifugal impeller. To get an insight into the unsteady flow characteristics in the tip region of a semi-open centrifugal pump, the SST k-ω two-equation model was used to solve the N-S equation. And the fast Fourier transform (FFT) was used to transform the time domain value of vorticity of each monitoring point into frequency domain value, so as to monitor the frequency domain characteristics. The correlation mechanism between the leakage vortex trajectory and the blade loading was studied and the spectral characteristics of the leakage vortex were analyzed. The results showed that the angle θ between the leaking vortex core and the blade bone line was changed periodically with the tip blade loading. The leakage flow accelerated the flow separation at the tip, forming a vortex tube extending from the tip blade surface to the shroud. At 0.75Qd, the 0.51fB in the tip region was the main disturbance signal, which was closely related with the secondary leakage and the unsteady pulsation of the vortex tube. As the flow rate decreased, the disturbance frequency was changed, and the tip leakage vortex crushing position was moved toward the leading edge of the blade. Under the near-stall operating points, the unsteady fluctuation of the leakage flow was aggravated by the pulsation and shedding of the vortex tube, and the tip leakage vortex crushing position was extended to the leading edge of the blade. The unsteady characteristics of the tip leakage flow of the semi-open centrifugal pump were researched, which provided a theoretical basis for the optimal design of the semi-open impeller and the capture of stall signal. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 33
Main heading: Vortex flow
Controlled terms: Centrifugal pumps? - ?Crushing? - ?Fast Fourier transforms? - ?Flow separation? - ?Frequency domain analysis? - ?Impellers? - ?Navier Stokes equations? - ?Spectrum analysis? - ?Time domain analysis? - ?Unsteady flow
Uncontrolled terms: Centrifugal impeller? - ?Disturbance frequency? - ?Semi-open impellers? - ?Spectral characteristics? - ?Tip leakage vortex? - ?Transient pulsations? - ?Unsteady characteristics? - ?Unsteady flow characteristics
Classification code: 601.2 Machine Components? - ?618.2 Pumps? - ?631 Fluid Flow? - ?631.1 Fluid Flow, General? - ?921 Mathematics
DOI: 10.6041/j.issn.1000-1298.2019.06.018
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
25. Pose Estimation Method of Rotor UAV Based on Visual Mark Detection
Accession number: 20193907468502
Title of translation:
Authors: Qi, Yongsheng (1); Meng, Xuebin (1); Gao, Xuejin (2); Zhang, Lijie (1)
Author affiliation: (1) College of Electric Power, Inner Mongolia University of Technology, Huhhot; 010080, China; (2) Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 28-40 and 139
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to make the rotor UAV land on the ground platform quickly and accurately, a pose estimation method based on visual mark detection was proposed. Firstly, based on the geometric features of the standard helipad, a five-step landmark extraction algorithm was used to obtain the visual landmarks from the images captured by the airborne camera. In order to satisfy the rapid and real-time requirements of UAV autonomous landing process, a distance-based three-point corner detection algorithm was proposed, and 12 H-shaped corners were obtained. Then, by classifying and numbering the corners, the corners of the visual mark in the current image were matched with the corresponding corners in the reference image, and the homography matrix containing the pose information was calculated. Finally, the attitude angle of UAV was obtained by decomposing homography matrix with direct linear transformation (DLT), and the position of UAV relative to visual mark was calculated according to the similar triangle formed by camera imaging. The real-time performance and accuracy of the proposed methodology were proved by simulating the pose of UAV in different flight states on an experiment platform. The outcomes showed that the average running time of the given algorithm was 307.2 ms, the maximum root mean square error (RMSE) of position estimation was 0.006 2 m, and the maximum RMSE of attitude angle estimation was 0.313°, which can satisfy the requirements of accuracy and real-time in the autonomous landing process. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Aircraft detection
Controlled terms: Cameras? - ?Classification (of information)? - ?Computer vision? - ?Edge detection? - ?Linear transformations? - ?Mathematical transformations? - ?Mean square error? - ?Unmanned aerial vehicles (UAV)
Uncontrolled terms: Autonomous landing? - ?Average running time? - ?Direct linear transformation? - ?Extraction algorithms? - ?Pose estimation? - ?Real time performance? - ?Real time requirement? - ?Root mean square errors
Classification code: 652.1 Aircraft, General? - ?716.1 Information Theory and Signal Processing? - ?716.2 Radar Systems and Equipment? - ?723.5 Computer Applications? - ?742.2 Photographic Equipment? - ?921.3 Mathematical Transformations? - ?922.2 Mathematical Statistics
Numerical data indexing: Time 3.07e-01s
DOI: 10.6041/j.issn.1000-1298.2019.06.004
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
26. Design and Test of Feed Rate Monitoring System for Combine Harvester
Accession number: 20193907468396
Title of translation:
Authors: Zhang, Zhenqian (1); Sun, Yifan (1); Liu, Renjie (1); Zhang, Man (1); Li, Han (1); Li, Minzan (1)
Author affiliation: (1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China
Corresponding author: Zhang, Man(cauzm@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 85-92
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Feed rate is an important index of combine harvester, which directly affects operation efficiency and failure rate. In order to obtain accurate feed rate information constantly in the process of combine harvester operation, a feed rate monitoring system based on header power was designed and developed, and a feed rate prediction model was established. The monitoring system was mainly composed of sensing module, vehicle terminal and mobile terminal. Specifically, the sensing module included torque sensor, hall sensor and GPS receiver, etc. The vehicle terminal displayed the collected information locally and uploaded it to the server, and the mobile terminal realized the remote monitoring of the combine harvester’s operation parameters. Based on the establishment of the linear regression model for the feed rate prediction, the study applied double threshold filtering and low-pass filtering to the torque signal. The field test result showed that the system ran stably and communicated well. It also showed that the predictive determinant coefficient of the linear regression model was 0.755, meanwhile, the filtering method can effectively filter the noise and increase the predictive determinant coefficient to 0.852, which can meet the actual need of the combine harvester’s feed rate monitoring to a certain degree. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Monitoring
Controlled terms: Computer terminals? - ?Failure analysis? - ?Global positioning system? - ?Hall effect transducers? - ?Harvesters? - ?Low pass filters? - ?Mobile telecommunication systems? - ?Regression analysis
Uncontrolled terms: Combine harvesters? - ?Feed-rates? - ?Linear regression models? - ?Low-pass filtering? - ?Operation efficiencies? - ?Operation parameters? - ?Predictive modeling? - ?Remote monitoring
Classification code: 703.2 Electric Filters? - ?722.2 Computer Peripheral Equipment? - ?821.1 Agricultural Machinery and Equipment? - ?922.2 Mathematical Statistics
DOI: 10.6041/j.issn.1000-1298.2019.06.009
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
27. Evaluation of Rolling Resistance Characteristics Based on Simple Tire Experimental Modal Test
Accession number: 20193907468395
Title of translation:
Authors: Zhu, Chengwei (1); Liu, Yang (2); Zhuang, Ye (1); Gao, Xueliang (1); Chen, Qiang (1)
Author affiliation: (1) State Key Laboratary of Automotive Simulation and Control, Jilin University, Changchun; 130025, China; (2) KH Automotive Technologies (Changchun) Co., Ltd., Changchun; 130012, China
Corresponding author: Zhuang, Ye(yzhuang_cn@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 371-378
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Tire rolling resistance has a great impact on the fuel economy of automobiles, accounting for about 20%~30% of the fuel consumption of automobiles. Evaluation of tire rolling resistance had become a difficult problem to solve for the industry. Aiming at the problem of tire rolling resistance testing at the present stage and the mechanism of tire rolling resistance caused by hysteresis effect, a tire rolling resistance evaluation method based on simple experimental modal was proposed. The rolling resistance characteristics of different tire modes were evaluated by calculating different tire modal damping characteristics by using half-power bandwidth method. The experimental results showed that the half-power bandwidth of the different tires amplitude frequency characteristics was closely related to their rolling resistance coefficient and kept positive correlation, the larger the half-power bandwidth of the tire mode amplitude frequency characteristic was, the more dispersed the energy of the first-order resonance energy was, and the larger the tire rolling resistance coefficient was. Furthermore, the experimental results showed that there was good consistency between the modal damping ratio of different tires and tires rolling resistance coefficient. The larger the tire damping ratio was, the larger the tire rolling resistance coefficient was. Therefore, it proved that the method can qualitatively evaluate the tire rolling resistance characteristics, which not only improved the efficiency of tire rolling resistance testing, but also reduced the cost of testing. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 36
Main heading: Tires
Controlled terms: Bandwidth? - ?Damping? - ?Fuel consumption? - ?Fuel economy? - ?Modal analysis? - ?Rolling resistance
Uncontrolled terms: Amplitude frequency characteristics? - ?Experimental modal tests? - ?Modal damping ratios? - ?Modal parameters? - ?Piezoelectric film? - ?Positive correlations? - ?Resistance characteristics? - ?Resistance coefficients
Classification code: 525.2 Energy Conservation? - ?525.3 Energy Utilization? - ?716.1 Information Theory and Signal Processing? - ?818.5 Rubber Products? - ?921 Mathematics? - ?931.1 Mechanics
DOI: 10.6041/j.issn.1000-1298.2019.06.044
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
28. Experiment on Biomass Catalytic Gasification of Ni-Zn/Basalt Catalyst
Accession number: 20193907468549
Title of translation: Ni-Zn/
Authors: Niu, Yonghong (1); Tian, Yiming (1, 2)
Author affiliation: (1) School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou; 014010, China; (2) Jincheng Urban Planning and Design Institute, Jincheng; 048000, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 331-337
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The Ni-Zn/basalt composite catalyst was prepared by the method of in-situ hydrothermal. The microstructure and surface element distribution of the catalyst was characterized. Taking the pine particles as raw materials and water vapor as the gasification agent, and the test system platform of the lower suction tubular gasifier was adopted. Ni-Zn/basalt composite material was studied at different temperatures of high temperature steam catalytic gasification effect. Through investigating the changes in gas composition, the variation laws of the catalytic properties of Ni-Zn/basalt composite catalyst with temperature variation were studied. The result was compared with the contrast experiments with no catalyst and dolomite as catalyst performance. The experimental results showed that Ni and Zn could be well supported on the surface of basalt fiber with the reaction temperature of 130 and the reaction time of 12 h. Compared with no catalyst and adding dolomite catalyst, Ni-Zn/basalt composite catalyst gasification temperature at 950, the catalytic efficiency was improved significantly and the hydrogen volume fraction was significantly increased. The hydrogen volume fraction was increased to 63.28% while without catalyst, the hydrogen volume fraction was only 58.6% and with dolomite catalyst, the hydrogen volume fraction was 50.02%. It can be seen that Ni-Zn/basalt composite catalyst has high efficiency in the catalytic gasification reaction of pine sawdust. It can provide theoretical and experimental basis for further improving biomass gasification technology. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Catalysts
Controlled terms: Biomass? - ?Catalysis? - ?Efficiency? - ?Gasification? - ?Hydrogen? - ?Volume fraction
Uncontrolled terms: Biomass Gasification? - ?Catalytic efficiencies? - ?Catalytic gasification? - ?Gasification temperatures? - ?Hydrogen volume fraction? - ?Pine sawdust? - ?Surface element distribution? - ?Temperature variation
Classification code: 641.1 Thermodynamics? - ?802.2 Chemical Reactions? - ?802.3 Chemical Operations? - ?804 Chemical Products Generally? - ?913.1 Production Engineering
Numerical data indexing: Percentage 5.00e+01%, Percentage 5.86e+01%, Percentage 6.33e+01%, Time 4.32e+04s
DOI: 10.6041/j.issn.1000-1298.2019.06.038
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
29. Parallel Forestry Text Classification Technology Based on XGBoost in Spark Framework
Accession number: 20193907468381
Title of translation: SparkXGBoost
Authors: Cui, Xiaohui (1); Shi, Dongyu (1); Chen, Zhibo (1); Xu, Fu (1)
Author affiliation: (1) College of Information Science and Technology, Beijing Forestry University, Beijing; 100083, China
Corresponding author: Chen, Zhibo(zhibo@bjfu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 280-287
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: At present, the cross-integration of computer technology and forestry field had emerged a large number of forestry texts to be explored, and the shortcomings of related research could be summarized in two aspects: the classification labels in the existing classification system were set unscientific, leading to the classification model lacking of ability to classify the texts on net; the classification algorithm was mostly trained in the single-machine environment without considering its parallelism, then the algorithm could not deal with the actual large-scale data classification problem. Therefore, it was pretty realistic and urgency to design more scientific classification labels and classify forestry texts based on Spark framework. A new crawler technology was used to collect forestry-related texts, and re-construct labels by referring to the existing information retrieval system of forestry to improve the adaptability of classification models. Then the XGBoost parallelization implementation method was realized based on Spark, which completed the computing of training and prediction by RDD program mode. Through cross-validation method, the accuracy of XGBoost parallel algorithm could reach 0.923 4. The lowest F1-measure value was 0.860 4 and the highest was 0.998 4. By training on the 21 thousand, 42 thousand and 84 thousand data sets, the speedup ratios could reach 2.13, 3.47 and 3.82, respectively. The results showed that the new classification labels were set more scientific, and the system had better adaptability to the forestry-related texts on the existing internet. The precision and recall values of the XGBoost algorithm were significantly better than the four kinds of parallel algorithms based on Spark which included NB, gradient boosting decision tree, back propagation neural network, extreme learning machine and ran more effective than the stand-alone version. And with the increase of the data number, the acceleration ratio could be improved, which meant it was pretty useful to deal with the problem about the real-time and accurate classification of massive forestry texts. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Classification (of information)
Controlled terms: Backpropagation algorithms? - ?Big data? - ?Decision trees? - ?Electric sparks? - ?Forestry? - ?Information retrieval? - ?Machine learning? - ?Neural networks? - ?Parallel algorithms? - ?Scheduling algorithms ? - ?Search engines? - ?Text processing? - ?Timber
Uncontrolled terms: Back propagation neural networks? - ?Classification algorithm? - ?Classification labels? - ?Cross-validation methods? - ?Extreme learning machine? - ?Large-scale data classifications? - ?Text classification? - ?XGBoost
Classification code: 701.1 Electricity: Basic Concepts and Phenomena? - ?723 Computer Software, Data Handling and Applications? - ?903.1 Information Sources and Analysis? - ?903.3 Information Retrieval and Use? - ?961 Systems Science
DOI: 10.6041/j.issn.1000-1298.2019.06.032
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
30. Design and Experiment of Monitoring System for Rice Hill-direct-seeding Based on Piezoelectric Impact Method
Accession number: 20193907468386
Title of translation:
Authors: Wang, Jinwu (1); Zhang, Zhao (1); Wang, Fei (1); Jiang, Yeming (1); Zhou, Wenqi (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Zhou, Wenqi(zhouwenqi1989@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 74-84 and 99
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to accurately monitor the sowing state of rice hill-direct-seeding machine in real time and improve stability, taking rebound dipper rice hill-direct-seeding metering device as research carrier, PVDF piezoelectric film as sensing element, ATmega328P MCU as control core, a monitoring system for rice hill-direct-seeding based on piezoelectric impact method was designed. Based on analysis of seed throwing trajectory of rice seeds, seed-conducting tube which could be used to assist monitoring and indenting seed-conducting was designed, and the installation position of PVDF piezoelectric film sensor was determined. The control algorithm to four kinds of seeding faults was determined with characteristics of multi-seed hill-direct-seeding. The whole hardware circuit of system was designed and Bluetooth wireless serial transparent transmission APP was developed, so that wireless communication between the host computer and the slave computer could be realized. The results of bench test showed that the sensitivity of system can reach more than 90.83% under different working conditions, so the system can realize the effective capture of signal. The field performance experiment results showed that acousto-optic alarm operation can be done when fault was happened. Counting reseeding hill amount and miss seeding hill amount were shown on Bluetooth wireless serial transparent transmission APP, which were contrast with actual reseeding hill amount and miss seeding hill amount counted by manpower, and the minimum mean values of reseeding monitoring accuracy, miss seeding monitoring rate and effective monitoring rate of system were 81.79%, 80.42% and 97.67%, respectively, which can meet the monitoring requirement of rice hill-direct-seeding and enhance the operation quality of rice hill-direct-seeding. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Monitoring
Controlled terms: Bluetooth? - ?Computer hardware? - ?Piezoelectricity
Uncontrolled terms: Direct-seeding? - ?Installation position? - ?Monitoring system? - ?Piezoelectric film? - ?Piezoelectric impact method? - ?PVDF piezoelectric film sensors? - ?Transparent transmission? - ?Wireless communications
Classification code: 701.1 Electricity: Basic Concepts and Phenomena? - ?716.3 Radio Systems and Equipment? - ?722 Computer Systems and Equipment
Numerical data indexing: Percentage 8.04e+01%, Percentage 8.18e+01%, Percentage 9.08e+01%, Percentage 9.77e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.008
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
31. Design and Experiment of Potato Harvester Potato Stem Separation Equipment
Accession number: 20193907468300
Title of translation:
Authors: Lü, Jinqing (1); Wang, Pengrong (1); Liu, Zhifeng (1); Li, Zihui (1); Zou, Fayi (1); Yang, Deqiu (2)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 100-109
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming at the problems that potato stems trash separation was ineffective during the potato harvest, potato harvest potato stem separation equipment was designed under the condition of heavy soil in northern China. Based on the kinematics analysis of the potato stems during lifting process of device and the analysis of force during the separation process and elastic mechanics analysis during the separation process, an elastic mechanics model was established, the main factors affecting the separation effect of the yam were determined, and the picking roll speed affecting the separation performance was obtained. Taking the distance between the line speed, picking roll and the main driving roller of the first-stage lift separation screen as the test factor, and the field test was carried out with the impurity-containing test index. The test results showed that when the distance between picking roll and the main driving roller of the first-stage lift separation screen was 2.5 mm, the rotation speed of the picking roller was 9.0 r/s, and the linear speed of the main driving roller of the first-stage lifting separation screen was 1.6 m/s, the impurity content was 2.4%, and the index was superior to the national industry standard. The research result provided an important theoretical support and reference for both large combine harvesters and segmented potato harvesters, and also provided important theoretical support and technical reference for the separation of potato and potato stem during potato mechanical harvesting. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Harvesters
Controlled terms: Harvesting? - ?Mechanics? - ?Rollers (machine components)? - ?Rolls (machine components)
Uncontrolled terms: Combine harvesters? - ?Elastic mechanics? - ?Elastic mechanics model? - ?Kinematics analysis? - ?Potato harvesters? - ?Separation devices? - ?Separation equipment? - ?Separation performance
Classification code: 601.2 Machine Components? - ?821.1 Agricultural Machinery and Equipment? - ?821.3 Agricultural Methods? - ?931.1 Mechanics
Numerical data indexing: Percentage 2.40e+00%, Size 2.50e-03m, Velocity 1.60e+00m/s
DOI: 10.6041/j.issn.1000-1298.2019.06.011
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
32. Research Progress in Key Processing Technology of Soybean Milk Powder
Accession number: 20193907468349
Title of translation:
Authors: Jiang, Lianzhou (1); J., Hu; Y., Liu; Z., Jiang; Z., Wang; Z., Fan
Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China; (2) Department of Admission and Employment, Heilongjiang Institute of Technology, Harbin; 150050, China; (3) Computing Center of Heilongjiang Province, Harbin; 150028, China; (4) The Great Northern Wilderness Green Health Food Co., Ltd., Harbin; 150036, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 1-11
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In recent years, China’s soybean milk powder market has broad prospects and the industry is developing rapidly, forming three mainstream soybean milk powder processing technology systems: dry, wet and semi-wet. The influence of the key technologies of various stages of soybean milk powder processing on the instant solubility, soybean meal and allergenicity of soybean milk powder products was introduced. And the residual taste, high sensitization and quick solubility of soybean milk powder was summarized. The process control scheme of technical bottlenecks such as poor taste, poor taste experience and low quality stability and the development of China’s soybean milk powder industry were summarized and prospected, which provided reference for the production technology, standard establishment and product development of soybean milk powder in China. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 92
Main heading: Solubility
Uncontrolled terms: Allergenicity? - ?Key technologies? - ?Low qualities? - ?Processing procedures? - ?Processing technologies? - ?Production technology? - ?Soybean meal? - ?Soybean milks
Classification code: 801.4 Physical Chemistry
DOI: 10.6041/j.issn.1000-1298.2019.06.001
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
33. Fatigue Analysis of Gearbox Shell of High Horsepower Tractor Based on Power Density
Accession number: 20193907468530
Title of translation:
Authors: Wen, Changkai (1); Xie, Bin (1); Yang, Zihan (1); Dong, Naixi (1); Song, Zhenghe (1)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Xie, Bin(xiebincau@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 389-396 and 404
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: As an important power machine in agricultural machinery, high-powered tractors have a wide range of speeds and large horsepower, which can be loaded with different agricultural implements to achieve diversified operations. During the field operation, the gearbox housing is subjected to various loads, including the coupling of stress amplitude and load frequency, and it is necessary to perform a fatigue analysis of the gearbox housing close to the actual situation. The concept of power density was introduced, and the fatigue life prediction method combining power density and time-frequency analysis was proposed. The effects of stress amplitude and load frequency on the fatigue life analysis of key components of high horsepower were studied. Taking 88kW tractor as research object, a dynamic strain test system was set up, and the load-time history of 88kW tractor under different operating conditions was collected. Based on the measured load, the fatigue life analysis method of the 88 kW tractor gearbox shell was predicted by the fatigue life analysis method combining power density and time-frequency analysis. The fatigue life of the dangerous point was 24 001 h, compared with the fatigue life (35 676 h) obtained from the nominal stress method based on Miner theory, the actual working life was more accepted. The research result provided a more realistic analysis method for the fatigue life of key components of agricultural machinery and equipment, and promoted the development of fatigue analysis theory. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Fatigue of materials
Controlled terms: Agricultural implements? - ?Agriculture? - ?Automobile testing? - ?Gears? - ?Housing? - ?Tractors (agricultural)? - ?Tractors (truck)
Uncontrolled terms: Different operating conditions? - ?Fatigue life analysis? - ?Fatigue life prediction? - ?Gearbox shell? - ?Load frequency? - ?Nominal stress methods? - ?Power densities? - ?Time frequency analysis
Classification code: 403.1 Urban Planning and Development? - ?601.2 Machine Components? - ?662 Automobiles and Smaller Vehicles? - ?663.1 Heavy Duty Motor Vehicles? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control? - ?821.1 Agricultural Machinery and Equipment? - ?951 Materials Science
Numerical data indexing: Power 8.80e+04W, Time 1.28e+08s, Time 8.64e+07s
DOI: 10.6041/j.issn.1000-1298.2019.06.046
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
34. Optimum Design and Test of Variable Diameter Double Disc Air Suction Precision Seeder
Accession number: 20193907468458
Title of translation:
Authors: Zhang, Kaixing (1); Li, Jinfeng (1); Song, Zhenghe (2); Liu, Xianxi (1, 3); Liu, Lei (1)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China; (3) Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments, Tai’an; 271018, China
Corresponding author: Liu, Xianxi(wjbliu@sdau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 52-63
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming at the defect that the existing air-suction disc precision seeder needs to replace the seed metering disc for seeding seeds of different sizes, and in order to save cost and improve the versatility of the seed metering device, a variable-size double disc air-suction precision seeder was developed, which can realize the precision seeding of seeds of different sizes without changing the disc. Based on the existing disc-type metering device, a double disc structure with variable particle size was designed, its basic structure and working principle were expounded, theoretical analysis of the working process and key components of the metering device were made, the key structural parameters such as hole layout, hole shape and hole cone angle were determined, and Fluent simulation was used to analyze the influence of five combined holes on the flow field in the chamber. The optimum combination hole parameters were obtained by real analysis, and the uniformity test and orthogonal test of seeding were carried out on JSP-12 seeding test-bed. The reasonable ranges of negative pressure and rotational speed of seeding plate were obtained when the seeding performance was better. The results showed that the qualified rate was 90.46%, the missing rate was 2.59%, and the replaying rate was 6.94% when the disc hole of the metering device was a chamfered hole with conical angle of 60 degrees, the rotational speed was 34.5 r/min and the negative pressure was 4.1 kPa. The metering performance was better and the seeding requirement was satisfied. During the verification process of field experiment, the average qualified rate was 90.16%, the seeding leakage rate was 2.77%, the consistency coefficient of variation of seeding row displacement was 5.34%, and the stability coefficient of total displacement was 4.86%. Compared with traditional metering device, the operation effect was significantly improved. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Disks (structural components)
Controlled terms: Particle size? - ?Particle size analysis? - ?Pneumatic materials handling equipment
Uncontrolled terms: Air suction? - ?Consistency coefficient? - ?Double disc? - ?Optimum combination? - ?Seed metering devices? - ?Stability coefficient? - ?Structural parameter? - ?Verification process
Classification code: 408.2 Structural Members and Shapes? - ?632.4 Pneumatic Equipment and Machinery? - ?951 Materials Science
Numerical data indexing: Percentage 2.59e+00%, Percentage 2.77e+00%, Percentage 4.86e+00%, Percentage 5.34e+00%, Percentage 6.94e+00%, Percentage 9.02e+01%, Percentage 9.05e+01%, Pressure 4.10e+03Pa, Rotational_Speed 3.45e+01RPM
DOI: 10.6041/j.issn.1000-1298.2019.06.006
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
35. Grading Removal of Residual Plastic Film in Machine-harvested Cotton Using Electrostatic Adsorption Method
Accession number: 20193907468350
Title of translation:
Authors: Wang, Qiaohua (1, 2); Weng, Fujiong (1, 2); Zhang, Hongzhou (1, 3); Yuan, Cheng (1, 2); Li, Li (1, 2)
Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) Key Laboratory of Agricultural Equipment in Mid-Lower Yangtze River, Ministry of Agriculture and Rural Affairs, Wuhan; 430070, China; (3) College of Mechanical and Electronic Engineering, Tarim University, Alaer; 843300, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 140-147
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: A method based on electrostatic adsorption for grading removal of residual plastic film in machine-harvested cotton was proposed. The machine-harvested cotton of Xinluzao No.26 planted in Alaer region of Xinjiang was the research object. According to the correlation between the degree of polarization charge and the curved form of the residual plastic film in machine-harvested cotton, the characteristics of various residual plastic film in machine-harvested cotton were extracted by image processing, and then the residual film was graded by clustering algorithm and divided into , and grades. Then the electrostatic adsorption separation platform was constructed, and factors of different charge times, flying speed and polar plate voltage of machine-harvested cotton with different grades of residual plastic film were tested. Taking the impurity removal efficiency as the index, the optimum combination of the external influencing factors of the corresponding grade residual plastic film was found in order to achieve the maximum separation between the residual plastic film and machine-harvested cotton. The results indicated that the factors affecting the removal impurity efficiency were: charge time, flying speed, and polar plate voltage. The optimum charging time of machine-harvested cotton with grade residual plastic film was 24 s, flying speed was 4.7 m/s, plate voltage was 39 kV, and separation rate was 96.2%; grade : charging time was 29.8 s, flying speed was 5.8 m/s, plate voltage was 37.6 kV, separation rate was 98.1%; grade : charging time was 30.1 s, flying speed was 3.5 m/s, plate voltage was 46.2 kV, and the separation rate was 97.2%. The results showed that the method of grading removing residual film based on electrostatic adsorption was feasible and met the needs of practical development. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Charging time
Controlled terms: Adsorption? - ?Clustering algorithms? - ?Cotton? - ?Efficiency? - ?Electrostatic generators? - ?Electrostatics? - ?Grading? - ?Harvesting? - ?Image processing? - ?Plastic films ? - ?Removal? - ?Separation? - ?Speed
Uncontrolled terms: Degree of polarization? - ?Electrostatic adsorption? - ?Impurity removal? - ?Optimum combination? - ?Removal impurities? - ?Research object? - ?Residual films? - ?Separation rate
Classification code: 701.1 Electricity: Basic Concepts and Phenomena? - ?802.3 Chemical Operations? - ?817.1 Polymer Products? - ?821.3 Agricultural Methods? - ?821.4 Agricultural Products? - ?903.1 Information Sources and Analysis? - ?913.1 Production Engineering
Numerical data indexing: Percentage 9.72e+01%, Time 2.40e+01s, Time 2.98e+01s, Time 3.01e+01s, Velocity 3.50e+00m/s, Velocity 4.70e+00m/s, Velocity 5.80e+00m/s, Voltage 3.76e+04V, Voltage 3.90e+04V, Voltage 4.62e+04V
DOI: 10.6041/j.issn.1000-1298.2019.06.015
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
36. Design and Test of Side-direction Straw-cleaning Blade for Seedbed Treatment of Original Stubble Planter
Accession number: 20193907468302
Title of translation:
Authors: Hou, Shouyin (1); Chen, Haitao (1); Zou, Zhen (1); Shi, Naiyu (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Chen, Haitao(htchen@neau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 41-51 and 217
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to explore the influence of the side-direction straw-cleaning blade for seedbed treatment of original stubble planter on straw winding, vibration intensity, power consumption and straw mulching uniformity during machine operation, the structure and working principle of side-direction straw-cleaning device was introduced, the structure of side-direction straw-cleaning blade and the working curve of slippery cutting surface was designed, and the key structure and working parameters affecting the working performance of the blade were determined. By using four factors and three levels orthogonal test method, the initial radius ρ0, initial slip angle τ0, blade carrying shaft angular velocity ω and tool operating speed vm were selected as the influencing factors, and the straw winding, vibration intensity, equivalent power consumption and straw mulching uniformity were taken as the evaluation indexes. The optimal analysis of the structure and working parameters combination of the blade affecting the tool operating performance was carried out. For straw winding, the order of primary and secondary effects was as follows: initial slip angle, initial radius, tool operating speed and blade carrying shaft angular velocity; for vibration intensity, the order of primary and secondary effects was as follows: tool operating speed, initial slip angle, blade carrying shaft angular velocity and initial radius; for equivalent power consumption, the order of primary and secondary effects was as follows: tool operating speed, initial slip angle, blade carrying shaft angular velocity and initial radius. Under the conditions with the initial radius of 200 mm, the initial slip angle of 30°, blade carrying shaft angular velocity of 42 rad/s and tool operating speed of 7.2 km/h, there was no straw winding, vibration intensity was 159 m/s2, equivalent power consumption was 4.9 kW, and straw mulching uniformity was 0.075. Compared with the existing combination of cutters and teeth, the vibration intensity was decreased by 46.5%, equivalent power consumption was decreased by 29.7%, and there was no tool blockage in the working process. The research results can provide theoretical and experimental data support for the design of key components of lateral straw cleaning device of 2BMFJ series no-tillage straw mulching precision seeder. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Cleaning
Controlled terms: Agriculture? - ?Angular velocity? - ?Electric power utilization? - ?Testing? - ?Winding
Uncontrolled terms: Cleaning blades? - ?No-tillage planter? - ?Operating performance? - ?Orthogonal test method? - ?Side-slip? - ?Structure and working parameters? - ?Vibration intensity? - ?Working performance
Classification code: 691.2 Materials Handling Methods? - ?706.1 Electric Power Systems? - ?802.3 Chemical Operations? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing: Acceleration 1.59e+02m/s2, Angular_Velocity 4.20e+01rad/s, Percentage 2.97e+01%, Percentage 4.65e+01%, Power 4.90e+03W, Size 2.00e-01m, Velocity 2.00e+00m/s
DOI: 10.6041/j.issn.1000-1298.2019.06.005
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
37. Design and Experiment of Operation Machine for Filming and Girdle Covering on Double Ridges
Accession number: 20193907468522
Title of translation:
Authors: Dai, Fei (1); Zhao, Wuyun (1); Shi, Ruijie (1); Zhang, Fengwei (1); Ma, Haijun (2); Ma, Mingyi (2)
Author affiliation: (1) College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou; 730070, China; (2) Gansu Tao River Tractor Manufacturing Co., Ltd., Dingxi; 730500, China
Corresponding author: Zhao, Wuyun(zhaowy@gsau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 130-139
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Whole plastic mulching and furrow planting has been widely adopted as a drought resistant cultivation model in the northwest arid area of China in recent years. For further integration agronomic requirement of whole plastic-film mulching on double ridges, in order to realize the mechanized construction of seedbed, a combined operation machine was designed, which synchronously realized institutional operation once such as fertilization, ridging, filming, infiltration hole punching and girdle covering on double ridges. Based on the prototype, the key parts were designed and selected, the structure and operation parameters of soil elevating mechanism and pressing-punching mechanism were determined, and the power consumption of rotary blades was calculated. The operation process of soil transporting-covering mechanism and girdle soil covering mechanism were analyzed, and the necessary work conditions to make sure that the covering soil on the all parts of the seedbed were analyzed and calculated. For the relevant work performance test of prototype, the field experimental results showed that under the condition of the operation speed of 0.50 m/s, the mechanical damage degree of day lighting surface of plastic film was 38.6 mm/m2, the qualified rates of ridging height was 89.8%, the qualified rates of furrow center distance was 90.7%, the qualified rates of soil width covered on seedbed film edge was 95.8%, the qualified rates of girdle covering soil width was 95.6%, the qualified rates of soil depth covered on seedbed was 95.2%, the spacing qualification rate of girdle covering soil was 93.5%, and the spacing qualification rate of water-leaking hole was 97.1%, which met the relevant work quality evaluation specification requirements, and the experimental results also met the design requirements of combined operation machine. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Soils
Controlled terms: Drought? - ?Leakage (fluid)? - ?Plastic films
Uncontrolled terms: Combined operations? - ?Cultivation models? - ?Mechanical damages? - ?Operation parameters? - ?Operation process? - ?Plastic film mulching? - ?Specification requirement? - ?Work performance
Classification code: 444 Water Resources? - ?483.1 Soils and Soil Mechanics? - ?817.1 Polymer Products
Numerical data indexing: Percentage 8.98e+01%, Percentage 9.07e+01%, Percentage 9.35e+01%, Percentage 9.52e+01%, Percentage 9.56e+01%, Percentage 9.58e+01%, Percentage 9.71e+01%, Velocity 5.00e-01m/s
DOI: 10.6041/j.issn.1000-1298.2019.06.014
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
38. Classification of Unbalanced Agricultural Hyperspectral Data Based on SVC and Oversampling
Accession number: 20193907468604
Title of translation: SVC
Authors: Yuan, Peisen (1); Zhai, Zhaoyu (2); Ren, Shougang (1, 3); Gu, Xingjian (1); Xu, Huanliang (1, 3)
Author affiliation: (1) College of Information Science and Technology, Nanjing Agricultural University, Nanjing; 210095, China; (2) Superior School of Technical Engineering and Telecommunication Systems, Technical University of Madrid, Madrid; 28040, Spain; (3) National Engineering and Technology Center for Agriculture, Nanjing; 210095, China
Corresponding author: Xu, Huanliang(huanliangxu@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 257-264
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Hyperspectral technology is widely used in agricultural natural resources such as agro-ecological environment and land resource protection. Spectral imaging technology can effectively classify and identify ground objects. Therefore, the classification of hyperspectral data is one of the important contents of hyperspectral research. Category non-equilibrium problem is a common problem in agricultural hyperspectral data, and the classification quality of minority classes has great significance for the effective classification of hyperspectral data. However, the classification of minority classes is affected by the dominant majority classes. The general classification algorithm tends to the dominant majority classes classification, so that minority classes are usually submerged in the majority classes, bringing great challenge to classification accuracy and recall rate of the minority classes. The classification quality of the minority objects was studied in agricultural hyperspectral data. In order to improve the classification quality of minority classes, an oversampling technique SMOTE was proposed to add new samples for the minority classes. At the same time, the effects of new sample generation strategy and minority instance sampling rate on the classification results of minority samples in the agricultural hyperspectral data and the matching degree between the classifier and the model on the unbalanced data set were systematically studied. A multi-class classification SVC technique was used to classify minority classes on a new sampling data set, and it improved the classification accuracy of the minority classes in unbalanced agricultural hyperspectral dataset. The experimental verification was carried out on the real data set, and different classification methods and system parameters were tested and compared. The experimental results showed that the proposed method can greatly improve the effect of minority classification in unbalanced agricultural hyperspectral data. The weight precision can reach above 0.82, the weight recall rate was obviously improved from 11.11% to 26.15%,and F1 was increased from 5.81% to 40.85%. The method can provide a reference for the unbalanced agricultural hyperspectral data to improve the classification effect systematically. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 33
Main heading: Classification (of information)
Controlled terms: Agriculture? - ?Imaging techniques? - ?Natural resources? - ?Spectroscopy? - ?Static Var compensators
Uncontrolled terms: Classification algorithm? - ?Experimental verification? - ?Hyperspectral data classification? - ?Imbalanced data? - ?Multi-class classification? - ?Over sampling? - ?SMOTE? - ?Spectral imaging technology
Classification code: 704.2 Electric Equipment? - ?716.1 Information Theory and Signal Processing? - ?746 Imaging Techniques? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing: Percentage 1.11e+01% to 2.61e+01%, Percentage 5.81e+00% to 4.09e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.029
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
39. Detection Method of Boundary of Paddy Fields Using Support Vector Machine
Accession number: 20193907468602
Title of translation:
Authors: Cai, Daoqing (1); Li, Yanming (1); Qin, Chengjin (1); Liu, Chengliang (1)
Author affiliation: (1) School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China
Corresponding author: Li, Yanming(ymli@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 22-27 and 109
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Automatic navigation is the core elements of agricultural intelligence, and the machine vision based navigation route detection is the core content of automatic navigation system. An algorithm based on support vector machine was proposed to detect paddy field boundary. Support vector machine, instead of traditional image segmentation algorithms, was used to segment the paddy field image, and the robustness of boundary detection under different illumination conditions was improved. Superpixel segmentation algorithm was used to obtain superpixels instead of pixels for subsequent image processing. Superpixels reduced the computational complexity and provided a large number of samples for model training of support vector machine. A sufficient number of superpixel samples were selected for extracting color features and texture features to form a 19-dimensional feature vector. Color features were statistical properties in RGB and HSV color spaces, including R average, G average, B average, H average, S average, V average, H variance, S variance and V variance. Texture features included gradient amplitude mean and weighted gradient direction histogram. Then support vector machine model was trained and used to identify the paddy ridge field in the new picture. In order to judge the performance of the algorithm, the superpixel classification results and the actual manual labeling results were compared based on the 50 images containing paddy ridge field. The recognition F1-score can reach 90.7%. Finally, Hough detection was used to extract the boundary of the paddy ridge field. It took less than 0.8 s on NVIDIA’s Jetson TX2 hardware platform by the algorithm and can meet the real-time requirement of agricultural machinery. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Image segmentation
Controlled terms: Agriculture? - ?Color? - ?Computer vision? - ?Image enhancement? - ?Navigation systems? - ?Statistical methods? - ?Superpixels? - ?Support vector machines? - ?Textures? - ?Vectors
Uncontrolled terms: Automatic navigation systems? - ?Classification results? - ?Gradient direction histograms? - ?Illumination conditions? - ?Image segmentation algorithm? - ?Paddy ridge? - ?Superpixel segmentations? - ?Support vector machine models
Classification code: 723 Computer Software, Data Handling and Applications? - ?723.5 Computer Applications? - ?741.1 Light/Optics? - ?741.2 Vision? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control? - ?921.1 Algebra? - ?922.2 Mathematical Statistics
Numerical data indexing: Percentage 9.07e+01%, Time 8.00e-01s
DOI: 10.6041/j.issn.1000-1298.2019.06.003
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
40. Uncertainty Analysis of Walnut Canopy Temperature Measurement Based on Thermal Infrared Imaging
Accession number: 20193907468573
Title of translation:
Authors: Sun, Sheng (1); Zhang, Jinsong (1, 2); Meng, Ping (1, 2); Wang, Guibin (2); Yin, Changjun (1); Wang, Xinmei (1)
Author affiliation: (1) Research Institute of Forestry, Chinese Academy of Forestry, Beijing; 100091, China; (2) Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing; 210037, China
Corresponding author: Zhang, Jinsong(zhangjs@caf.ac.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 249-256
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to explore and quantify the uncertainty caused by the thermal infrared imaging system for the measurement of walnut canopy temperature, the A310f thermal imager was used to perform a high-frequency and continuous observation of the canopy temperature of three sample trees for 20 days in the walnut plantation. During the period, the canopy temperature was measured in different directions (east, west, south and north) and at different angles (10°, 30°, 45°, 60° and 80°). First of all, the sensitivity analysis of five important parameters showed that the canopy temperature was most affected by leaf emissivity (Εleaf), followed by the ambient reflection temperature (Trefl), and was less affected by air temperature (Ta) and air relative humidity (RH). It was not sensitive to distance (D) changes. Then, two-way analysis of variance was performed between the canopy temperature of three sample trees and four directions. The results showed that there was a significant level (P ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 29
Main heading: Uncertainty analysis
Controlled terms: Forestry? - ?Gradient methods? - ?Infrared radiation? - ?Pixels? - ?Sensitivity analysis? - ?Temperature measurement? - ?Thermography (imaging)
Uncontrolled terms: Bimodal distribution? - ?Canopy temperature? - ?Continuous observation? - ?External temperature? - ?Temperature differences? - ?Thermal infrared imaging? - ?Uncertainty? - ?Walnut
Classification code: 741.1 Light/Optics? - ?742.1 Photography? - ?921 Mathematics? - ?921.6 Numerical Methods? - ?922.1 Probability Theory? - ?944.6 Temperature Measurements
Numerical data indexing: Age 5.48e-02yr
DOI: 10.6041/j.issn.1000-1298.2019.06.028
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
41. Simulation Accuracy of Growth and Development of Winter Rape (Brassica napus L.) in Guanzhong Plain with Different Crop Models
Accession number: 20193907468312
Title of translation:
Authors: Mao, Xin (1, 2); Yang, Jianli (1); Zhu, Xiaohua (2, 3); He, Chuan (2, 3); Feng, Hao (3, 4); He, Jianqiang (2, 3)
Author affiliation: (1) Hybrid Rapeseed Research Center of Shaanxi Province, Yangling; Shaanxi; 712100, China; (2) Key Laboratory for Agricultural Soil and Water Engineering in Arid Areas, Ministry of Education, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling; Shaanxi; 712100, China; (4) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling; Shaanxi; 712100, China
Corresponding author: Yang, Jianli(sxyczxjly@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 306-314
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Crop growth simulation models provided convenience for agricultural production research. However, there were many differences among the models in some of their structures and process descriptions. Thus, different models might have different simulation accuracies in different regions. An insufficient irrigation experiment of winter rape (Brassica napus L.) was conducted for six consecutive years (2009-09-2015-05) in Guanzhong Plain in Shaanxi Province. And the STICS, DSSAT and APSIM models were used to simulate the phenology dates and yields of winter rape based on the experimental data to evaluate their simulation accuracies. The results showed that the simulation accuracy of STICS was the highest among the three models with average value of absolute relative error (RARE) of 3.24%; APSIM model ranked the second with average RARE of 8.79%; DSSAT model was the worst with average RARE of 11.38%. In addition, the simulation accuracy of STICS model was the highest in both phenology dates and yields of winter rape. The simulation accuracy of DSSAT model in phenology date was higher than that of APSIM model, while in yield the simulation accuracy of APSIM was higher than that of DSSAT model. However, the simulation accuracies of the three models were all low in the season of 2012-2013 due to the low precipitation, which meant that the three models were inadequate in the simulation of drought stress conditions. In general, the accuracy of the STICS model was higher than those of DSSAT and APSIM models. The STICS model was recommended for the simulation of winter rape growth in the Guanzhong Plain. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 44
Main heading: Crops
Controlled terms: Biology
Uncontrolled terms: Agricultural productions? - ?Crop model? - ?Drought stress conditions? - ?Dssat models? - ?Growth and development? - ?Process descriptions? - ?Simulation accuracy? - ?Winter rape
Classification code: 461.9 Biology? - ?821.4 Agricultural Products
Numerical data indexing: Percentage 1.14e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.035
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
42. Drying Characteristics of Carrot Slices during Microwave-Hot-airflow Rolling Drying
Accession number: 20193907468633
Title of translation: -
Authors: Lü, Weiqiao (1); Su, Dianbin (1); Wang, Tianxing (1); Zhao, Dan (2); Ma, Jiwei (2); Li, Dong (1)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China
Corresponding author: Li, Dong(dongli@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 352-358
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to improve the drying quality of fruit and vegetables, microwave-hot-airflow rolling drying (MARD) device was developed, using which the thermal image of carrot slices during drying was measured. In addition, the moisture state and distribution in different drying stages were detected with low-field nuclear magnetic resonance analysis and imaging (NMR/MRI). The dielectric constant Ε’ and dielectric loss factor Ε” of carrot slices in the corresponding drying stage were also measured. The dehydration process and drying quality of the materials were analyzed by comprehensive indexes, and the results showed that the drying speed of carrot slices was decreased gradually, and the drying temperature was distributed evenly, and floated in the set range. In NMR spectrum, the water signal was decreased gradually and the main peak was shifted to the left, when the water was changed to the direction of compact combination with dry matter. The MR signal showed that the water distribution was uniform during MARD. With the development of MARD, the Ε’ and Ε” of materials were decreased significantly, and the dielectric loss at the edge was lower than that at the core. With the drying processing, the difference was decreased, indicating the effect of non-uniform microwave drying caused by the difference of dielectric properties would be weakened in the MARD process. The research provided a reference for improving the efficiency and quality of microwave drying of fruits and vegetables. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Drying
Controlled terms: Dehydration? - ?Dielectric devices? - ?Dielectric losses? - ?Dielectric materials? - ?Dielectric properties? - ?Fruits? - ?Image enhancement? - ?Microwave heating? - ?Microwaves? - ?Nuclear magnetic resonance ? - ?Nuclear magnetic resonance spectroscopy? - ?Rolling? - ?Vegetables? - ?Water supply systems
Uncontrolled terms: Carrot slice? - ?Dielectric loss factors? - ?Drying characteristics? - ?Fruit and vegetables? - ?Fruits and vegetables? - ?Hot airflow? - ?Low field nuclear magnetic resonance? - ?Microwave drying
Classification code: 446.1 Water Supply Systems? - ?708.1 Dielectric Materials? - ?711 Electromagnetic Waves? - ?711.1 Electromagnetic Waves in Different Media? - ?802.2 Chemical Reactions? - ?821.4 Agricultural Products? - ?931.2 Physical Properties of Gases, Liquids and Solids
DOI: 10.6041/j.issn.1000-1298.2019.06.041
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
43. Design and Experiment of Online Sorting System for Perilla
Accession number: 20193907468627
Title of translation:
Authors: Zhao, Bo (1); Wang, Ye (1); Dong, Xin (1); Li, Yashuo (1); Jiang, Hanlu (1); Lü, Chengxu (1)
Author affiliation: (1) State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 156-162 and 172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In view of sorting perilla being high labor intensity, low efficiency by manual work and lacking automatic sorting system in China, a high efficiency system for sorting perilla was developed. The system was composed of hardware modules and software modules. The hardware modules included feeding unit, detecting unit, transporting unit, sorting unit, blanking unit, air supply system and control system. The maximum length of perilla’s blade was the most important and suitable parameter in sorting perilla according to its size. In order to carry out image processing and measure the maximum length of perilla’s blade, a high efficiency algorithm was developed based on morphological features of perilla. The algorithm consisted of target extraction, minimum circumscribed circle searching and result sorting. Based on the above hardware modules and the algorithm for measuring the maximum length of perilla’s blade, the software modules was developed. Experimental results showed that the processing time of single image was about 0.18 s, the sorting speed was 4 pieces per second, the total average absolute error of the proposed system to measure the maximum length of perilla’s blade was about 0.157 cm and the total sorting accuracy was 90.09%. The system realized the whole process of sorting perilla from feeding to blanking automatically with minimum destruction at a high speed and high accuracy, it provided technical support for later relevant research and development of perilla sorting system. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Image processing
Controlled terms: Computer vision? - ?Efficiency
Uncontrolled terms: Automatic sorting? - ?Automatic sorting systems? - ?Average absolute error? - ?High efficiency system? - ?Minimum circumscribed circles? - ?Nondestructive detection? - ?Perilla? - ?Research and development
Classification code: 723.5 Computer Applications? - ?913.1 Production Engineering
Numerical data indexing: Percentage 9.01e+01%, Size 1.57e-03m, Time 1.80e-01s
DOI: 10.6041/j.issn.1000-1298.2019.06.017
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
44. Remote Sensing Monitoring of Soil Surface Moisture Content Based on LM Algorithm
Accession number: 20193907468485
Title of translation: LM
Authors: Xu, Jinghui (1, 2); Wang, Lei (2); Wang, Yichen (2); Zhao, Zhongsheng (2); Han, Wenting (3)
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) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) Institute of Water-saving Agriculture in Arid Areas of China, 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: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 233-240
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming to research the data mining technology in remote sensing monitoring. The LM algorithm was used in the soil surface layer (about 1 cm) of soil moisture measurement (soil moisture content, SMC). Three kinds of soil, including yellow spongy, loess and red clay were selected. The soil water content samples of 0, 6%, 10%, 14%, 18% and 22% were prepared respectively. Visible light images were taken during 09:00-10:00 and 15:00-16:00, and image brightness was gradiently processed for simulating the change of light throughout the day. LM algorithm was compared with back propagation (BP) algorithm and classification and regression trees (CART) algorithm to verify the practical effect of LM. It was showed that the LM algorithm had a good application effect for the data mining based on the RGB color moment of soil pictures. The determination coefficient of the regression model for yellow spongy, loess and red clay was 0.958, 0.943 and 0.949, root mean square error (RMSE) was 1.6%, 2.0% and 1.9%, and the relative analysis error (RPD) was 4.873, 4.183 and 4.440, respectively. By the study of pictures at different intensities, LM algorithm can be used for monitoring soil moisture content of samples. It can be used for the soil surface (about 1 cm) moisture content measurement. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 29
Main heading: Soil surveys
Controlled terms: Backpropagation algorithms? - ?Data mining? - ?Light? - ?Mean square error? - ?Moisture control? - ?Moisture determination? - ?Monitoring? - ?Regression analysis? - ?Remote sensing? - ?Sediments ? - ?Soil moisture? - ?Trees (mathematics)
Uncontrolled terms: Classification and regression tree? - ?Data mining technology? - ?Determination coefficients? - ?LM algorithm? - ?Moisture content measurement? - ?Remote sensing monitoring? - ?Root mean square errors? - ?Soil moisture measurement
Classification code: 483 Soil Mechanics and Foundations? - ?483.1 Soils and Soil Mechanics? - ?723.2 Data Processing and Image Processing? - ?723.4 Artificial Intelligence? - ?741.1 Light/Optics? - ?921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory? - ?922.2 Mathematical Statistics? - ?944.2 Moisture Measurements
Numerical data indexing: Percentage 1.00e+01%, Percentage 1.40e+01%, Percentage 1.60e+00%, Percentage 1.80e+01%, Percentage 1.90e+00%, Percentage 2.00e+00%, Percentage 2.20e+01%, Percentage 6.00e+00%, Size 1.00e-02m
DOI: 10.6041/j.issn.1000-1298.2019.06.026
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
45. Automatic Interpretation of Spatial Distribution of Winter Wheat Based on Random Forest Algorithm to Optimize Multi-temporal Features
Accession number: 20193907468619
Title of translation: RF
Authors: Li, Xuqing (1, 2); Liu, Shimeng (1, 2); Li, Long (1, 2); Jin, Yongtao (1, 2); Fan, Wenlei (1, 2); Wu, Ling (3)
Author affiliation: (1) Institute of Computer and Remote Sensing Information Technology, North China Institute of Aerospace Engineering, Langfang; 065000, China; (2) Aerospace Remote Sensing Information Processing and Application Collaborative Innovation Center of Hebei Province, Langfang; 065000, China; (3) School of Infomation Engineering, China University of Geosciences (Beijing), Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 218-225
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to explore how to use the remote sensing image automatic interpretation technology to realize the winter wheat planting statistics survey and improve its extraction accuracy,the Gaofen-2 remote sensing image data of six key growth periods of winter wheat were selected. One of the most sensitive features to winter wheat area was selected respectively as the input variable from six features of near-infrared gray (NIR), red band gray (R), green band gray (G), blue wave band gray (B), ratio vegetation index (RVI) and normalized difference vegetation index (NDVI). One feature was selected for each time phase, and six features were selected for the six time phases. A model was constructed by using the random forest algorithm to extract winter wheat. The training set was constructed by selecting land samples with different growth and planting varieties in the study area. The model was constructed based on the multi-temporal features and applied to the whole Dachang Hui Autonomous County. The spatial distribution of winter wheat in Dachang Hui Autonomous County was obtained. Compared with the statistical results, the recognition accuracy of the model constructed by multi-temporal feature optimization was close to 90%. After sample optimization and post-processing, the accuracy can still be improved. This method can quickly extract winter wheat on the premise of ensuring the extraction accuracy, and greatly improve the corresponding work efficiency. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Crops
Controlled terms: Decision trees? - ?Extraction? - ?Image enhancement? - ?Infrared devices? - ?Remote sensing? - ?Spatial distribution? - ?Vegetation
Uncontrolled terms: Automatic interpretation? - ?Multi-temporal? - ?Normalized difference vegetation index? - ?Random forest algorithm? - ?Ratio vegetation indices? - ?Recognition accuracy? - ?Remote sensing images? - ?Winter wheat
Classification code: 802.3 Chemical Operations? - ?821.4 Agricultural Products? - ?921 Mathematics? - ?961 Systems Science
Numerical data indexing: Percentage 9.00e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.024
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
46. Extraction of Irrigation Networks in Irrigation Area of UAV Orthophotos Based on Fully Convolutional Networks
Accession number: 20193907468513
Title of translation:
Authors: Zhang, Hongming (1); Wang, Bin (1); Han, Wenting (2); Yang, Jiangtao (3); Pu, Pan (1); Wei, Jicheng (1)
Author affiliation: (1) College of Information Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) College of Water Resources and Architectural Engineering, 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: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 241-248
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The distribution information of irrigation networks in irrigation area acquired quickly and accurately had great important research significance, especially in the scientific allocation of regional agricultural water resources and improvement of water resources utilization rate. The semantic segmentation model based on fully convolutional networks (FCN) was used to extract the irrigation networks contours. Firstly, the orthophotos collected by UAV were manually labeled. Based on the VGG-19 network, the FCN-8s structure was realized by multi-scale feature fusion, and the Tensorflow deep learning framework was used to construct the FCN irrigation networks extraction model. Secondly,the data sets were enhanced and segmented. Lastly, the data sets were put into the FCN model for training and testing. The experimental results showed that for the test areas with different complexities, the extraction precision, completion and accuracy of the FCN model were 95.78%, 92.29% and 89.45%, respectively, which were higher than the support vector machine (SVM) method and the revised Hough transform (RHT) method. The results showed that the method can achieve high-accuracy extraction of the irrigation networks contours in irrigation area, and had good generalization and robustness, which provided good technical support for further accurate irrigation in agriculture. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 30
Main heading: Irrigation
Controlled terms: Convolution? - ?Deep learning? - ?Extraction? - ?Hough transforms? - ?Semantics? - ?Support vector machines? - ?Unmanned aerial vehicles (UAV)? - ?Water resources
Uncontrolled terms: Convolutional networks? - ?Irrigation Networks? - ?Multi-scale features? - ?Ortho photos? - ?Research significances? - ?Semantic segmentation? - ?Training and testing? - ?Water resources utilizations
Classification code: 444 Water Resources? - ?652.1 Aircraft, General? - ?716.1 Information Theory and Signal Processing? - ?723 Computer Software, Data Handling and Applications? - ?802.3 Chemical Operations? - ?821.3 Agricultural Methods? - ?921.3 Mathematical Transformations
Numerical data indexing: Percentage 8.95e+01%, Percentage 9.23e+01%, Percentage 9.58e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.027
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
47. Inversion of Heavy Metal Content in Rice Canopy Based on Wavelet Transform and BP Neural Network
Accession number: 20193907468451
Title of translation: BP
Authors: Li, Xuqing (1, 2); Li, Long (1, 2); Zhuang, Lianying (1); Liu, Weiqi (1); Liu, Xiangnan (3); Li, Jie (1)
Author affiliation: (1) Institute of Computer and Remote Sensing Information Technology, North China Institute of Aerospace Engineering, Langfang; 065000, China; (2) Aerospace Remote Sensing Information Processing and Application Collaborative Innovation Center of Hebei Province, Langfang; 065000, China; (3) School of Information Engineering, China University of Geosciences(Beijing), Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 226-232
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In the “natural farmland ecosystem”, although the biochemical parameters of crops are abnormal under the stress of heavy metal pollution, their characteristics are often very weak, with small changes and extreme unstability. Wavelet analysis, a common signal processing method in unstable signal processing, was used to process spectral reflectance data of crops (rice) and effectively extract weak information of “mutation” hidden in spectral signals under the stress of heavy metal pollution. Wavelet transform was carried out by using Db-5 wavelet basis, and singular points with abnormal spectral characteristics were selected. Back propagation neural network model (BPNN) was constructed by using spectral reflectance of corresponding bands of singular points (716 nm, 745 nm and 766 nm) to invert the contents of four heavy metals in rice canopy. Correlation analysis was conducted between the predicted and measured values of the model, and the results showed that the inversion model of heavy metal content in rice canopy based on BP neural network had a good inversion effect on the stress of cadmium, lead, mercury and arsenic in the experimental area. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Wavelet transforms
Controlled terms: Backpropagation? - ?Crops? - ?Ecosystems? - ?Heavy metals? - ?Neural networks? - ?Plants (botany)? - ?Pollution? - ?Processing? - ?Reflection? - ?Signal processing
Uncontrolled terms: Back propagation neural networks? - ?Biochemical parameters? - ?Common signal processing? - ?Heavy metal stress? - ?Hyper spectra? - ?Inversion models? - ?Spectral characteristics? - ?Spectral reflectances
Classification code: 454.3 Ecology and Ecosystems? - ?531 Metallurgy and Metallography? - ?716.1 Information Theory and Signal Processing? - ?723.4 Artificial Intelligence? - ?821.4 Agricultural Products? - ?913.4 Manufacturing? - ?921.3 Mathematical Transformations
Numerical data indexing: Size 7.16e-07m, Size 7.45e-07m, Size 7.66e-07m
DOI: 10.6041/j.issn.1000-1298.2019.06.025
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
48. Connotation and Value Implementation Mechanism of Ecological Products
Accession number: 20193907468382
Title of translation:
Authors: Zhang, Linbo (1, 2); Yu, Huiyi (1, 2); Li, Daiqing (1, 2); Jia, Zhenyu (1, 2); Wu, Fengchang (2); Liu, Xu (3)
Author affiliation: (1) State Environment Protection Key Laboratory of Regional Eco-process and Function Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Chinese Academy of Engineering, Beijing; 100088, China
Corresponding author: Yu, Huiyi(yuhy@craes.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 173-183
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Ecological products are a significant change in the concept of ecological civilization construction in China. It provides the practical grasp and material carrier for the “two mountains” theory. It is a systematic project involving economic, social, political and other related fields, which has great strategic and practical significance. However, there is still a lack of unified concept and classification of ecological products, which restricts the theoretical research and pilot practice of the realization of ecological product value to a certain extent. Ecological products are defined as the final products or services that ecosystems provide for human well-being through biological production and interaction with human production, according to the understanding of relevant studies at home and abroad. Ecological products are the necessities of life which are parallel with agricultural products and industrial products, which meet the needs of human beings for a better life. According to the degree of biological production, human production participation and service types, ecological products were divided into public ecological products and operational ecological products. To support the formulation of the development policy of eco-product industry and the in-depth research on the policy guarantee of the realization of eco-product value, the value source, value composition and possible mechanisms of implementing the value of ecological products were explored. The ways to realize the value of ecological products mainly included ecological protection compensation, ecological ownership transaction, operation development and utilization, green finance support, economic development promotion, policy and system incentive. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 56
Main heading: Ecosystems
Controlled terms: Agricultural products
Uncontrolled terms: Connotation? - ?Ecological products? - ?Ecosystem services? - ?Implementation mechanisms? - ?Natural capital
Classification code: 454.3 Ecology and Ecosystems? - ?821.4 Agricultural Products
DOI: 10.6041/j.issn.1000-1298.2019.06.019
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
49. Land Resources Ecosystem Service Value Accounting of Ganzhou City Based on Geographic National Condition Information
Accession number: 20193907468536
Title of translation:
Authors: Xia, Shufang (1, 2); Chen, Meiqiu (1, 3); Liu, Xin (2, 4); Cai, Haisheng (1, 3)
Author affiliation: (1) College of Landscape and Art, Jiangxi Agricultural University, Nanchang; 330045, China; (2) Provincial Geomatics Center of Jiangxi, Nanchang; 330209, China; (3) Research Center on Rural Land Resources Use and Protection, Jiangxi Agricultural University, Nanchang; 330045, China; (4) Jiangxi Province Engineering Research Center of Surveying, Mapping and Geoinformation, Nanchang; 330209, China
Corresponding author: Chen, Meiqiu(cmq12@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 184-193
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Land resources ecosystem service accounting is the internal requirement of promoting the construction of ecological civilization. Ganzhou City, located in Ganjiang upstream watershed, Jiangxi Province, is an important ecological barrier in Southern China and an important area to maintain the ecosystem health of the Poyang Lake Basin. Taking Ganzhou City as an example, the more suitable table of equivalence factor for Jiangxi area was presented, the method of value equivalent factor in unit area was used, and a service value account of land resources ecosystem was established based on the concept of broad-sense service value of land resources ecosystem. Then the land resources were divided into eight categories: farmland, forest, grassland, desert, bare land, construction land, water area and wetland, and the service value of land resources ecosystem in the form of value was calculated. The value of ecosystem services and its spatial distribution characteristics were applied to determine the priority of land ecological compensation for land resources in various counties, which provided reference for the application of geographic census data in the calculation of ecosystem services value of land resources. The results showed that compared with the conventional classification based on land use, the classification based on geographical national conditions was more refined for the land resources ecosystem services value can be more accurately calculated; in 2015, the total service value of Ganzhou land resources ecosystem was assessed at RMB 213.889 billion yuan, its order from big to small was regulating service, support service, supply service and cultural service, and the regulating service value took 70.49% of all the assets; in 2015, among all the counties, cities and districts, the county of Xunwu had the highest ecological service value per unit area, and all types of ecological service value varied in different regions. Analyzed from the spatial distribution, the ecological compensation priority in the surrounding areas of Ganzhou was relatively high, while the priority in the central areas was low. The northwestern areas had relatively high ecological compensation priority although their ecosystem service value per unit area was comparatively low. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 32
Main heading: Ecosystems
Controlled terms: Geographical regions? - ?Land use? - ?Natural resources? - ?Population statistics? - ?Spatial distribution
Uncontrolled terms: Distribution characteristics? - ?Ecological compensation? - ?Ecological service values? - ?Ecosystem service values? - ?Ecosystem services value? - ?Ganzhou City? - ?Geographic national conditions? - ?Value of ecosystem services
Classification code: 403 Urban and Regional Planning and Development? - ?454.3 Ecology and Ecosystems? - ?921 Mathematics
Numerical data indexing: Percentage 7.05e+01%
DOI: 10.6041/j.issn.1000-1298.2019.06.020
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
50. Visual Analysis Graph Research of Food Sampling Data Based on Mining Data Relationship
Accession number: 20193907468532
Title of translation:
Authors: Yang, Lu (1, 2); Zhang, Xinyue (1); Zheng, Limin (1, 2)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Beijing Laboratory of Food Quality and Safety, Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 50
Issue: 6
Issue date: June 25, 2019
Publication year: 2019
Pages: 272-279
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The relationship between data can be visualized by using multiple types of images, so it is convenient for users to obtain information and relationships between data. However, when many data items, attributes and links, and the relationships between data are not clear, a visual view which is capable of relationship mining is required. For the real task requirements of domain data analysis, elements such as circle layout and node link layout were used to display simple relationships and hierarchical structures between data. What’s more, combining concentric circle layout, scatter plots, thermogram elements and dynamic filtering and data clustering techniques, a relational mining view was proposed that not only demonstrated the nature of data nodes, but also revealed the potential relationships between data. Finally, combining the above views, a visual analysis graph of the mining data relationship was presented, which was ExploreView. It was applied to the sampling data set of the Food and Drug Administration, while using cube metaphor to organize data. The bipartite graph defined task requirements before completing visual coding. It can display the basic situation of data information and dynamically interact according to the actual needs of users, and reflect the attributes, various hierarchical structures and relationships between data. As a result, the visual analysis graph was easy and efficient to operate. It can be used to provide early warning for possible food safety incidents, locate key regulatory targets, which provided reference for the development of rules, and effectively met the needs of different types of users. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Data visualization
Controlled terms: Cluster analysis? - ?Clustering algorithms? - ?Flow visualization
Uncontrolled terms: Bipartite graphs? - ?Concentric circles? - ?Data clustering? - ?Data informations? - ?Data relationships? - ?Dynamic filtering? - ?Food and Drug Administration? - ?Hierarchical structures
Classification code: 631.1 Fluid Flow, General? - ?723 Computer Software, Data Handling and Applications? - ?903.1 Information Sources and Analysis
DOI: 10.6041/j.issn.1000-1298.2019.06.031
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.
Data Provider: Engineering Village
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