2010年第41卷第4期共收錄45篇
1. Accession number: 20102212966613
Title: Monitoring and controlling system of temperature and humidity for tunnel-type dryer Authors: Han, Qinghua1, 2 ; Wu, Haihua1, 3 ; Ye, Jinpeng2 ; Mao, Zhihuai1 ; Kang, Ze2 ; Fan, Yuntao3
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Agro-product Processing Engineering Center, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
3 State Key Laboratory of Soil Plant Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Mao, Z. (maozhh@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 119-123
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The temperature and humidity monitoring and controlling system in a tunnel-type dryer was developed, based on supervisory control and data acquisition (SCADA) systems, industrial personal computer (IPC) and programmable logic controller (PLC). The customized IPC software of monitoring and controlling system monitors real-time temperature and humidity through the communication between IPC and PLC. The software functions realized drying processing parameters inputting, real-time data acquisition and displaying, dynamic and historical data curves, database inquiry and report forms printout. The accuracy of temperature and humidity controlling meets with the requirement of the drying room, with the maximum track error as 2°C for temperature and 8% for relative humidity.
Number of references: 8
Main heading: Monitoring
Controlled terms: Atmospheric humidity - Computer control systems - Computer software - Controllers - Dryers (equipment) - Drying - Humidity control - Moisture - Personal computers - SCADA systems - Steel bridges - Systems analysis
Uncontrolled terms: Historical data - Humidity monitoring - Industrial personal computers - Monitoring and controlling System - Preserved fruit - Processing parameters - Real-time data acquisition - Relative humidities - Software functions - Supervisory control and data acquisition systems - System design - Time temperature - Track errors
Classification code: 801.4 Physical Chemistry - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 912.3 Operations Research - 732.1 Control Equipment - 941 Acoustical and Optical Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 961 Systems Science - 942 Electric and Electronic Measuring Instruments - 731.1 Control Systems - 402 Buildings and Towers - 443.1 Atmospheric Properties - 545.3 Steel - 642.1 Process Heating - 401.1 Bridges - 642.2 Industrial Furnaces and Components - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 643.3 Air Conditioning
DOI: 10.3969/j.issn.1000-1298.2010.04.025
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
2. Accession number: 20102212966598
Title: Design and experiment on straw returning machine with fast decomposing inoculant spray equipment
Authors: Dai, Fei1 ; Zhang, Fengwei1 ; Zhao, Chunhua1 ; Hu, Jingming1 ; Han, Zhengsheng2 ; Feng, Yongzhong3
Author affiliation: 1 Engineering College, Gansu Agricultural University, Lanzhou 730070, China
2 College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
3 College of Agronomy, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Zhang, F. (zhangfw@gsau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 47-51
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Traditional straw return implements slowly after the operation, and delays farming time, as well as, the straw burning causes environmental pollution. In light of the above problems, a fast decomposition straw returning machine which adopts the returning principle of combining decomposition agent spraying with mechanical straw shattering was designed. Field experiments show that straw decomposition rate of farmland when using this machine reaches 97.2% after 7 months, which is 17.1% higher than a single mechanical grinding treatment, and average wheat production is 16.5% higher than mechanical crushing method in the same area.
Number of references: 15
Main heading: Machine design
Controlled terms: Decomposition - Experiments
Uncontrolled terms: Agent design - Decomposition rate - Environmental pollutions - Fast decomposition - Field experiment - Mechanical crushing - Mechanical grinding - Spray equipment - Wheat production
Classification code: 601 Mechanical Design - 802.2 Chemical Reactions - 901.3 Engineering Research
DOI: 10.3969/j.issn.1000-1298.2010.04.010
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
3. Accession number: 20102212966611
Title: Effects of oxygen concentration on storage quality of agaricus bisporus under low temperature and controlled atmosphere storage
Authors: Wang, Juan1, 2 ; Wang, Xiangyou2 ; Li, Xia2
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author: Wang, X. (wxy@sdut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 110-113 123
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The effects of oxygen concentration on storage quality of Agaricus bisporus were studied at 3°C and 95% relative humidity under controlled atmosphere storage. The results show that 5% oxygen concentration inhibits the respiration and postpones the arrival of respiratory climacteric of mushroom. Weight losing rate, browning degree and firmness of Agaricus bisporus all decreases with the reduction of oxygen concentration. The soluble solid of mushroom is maintained and the ripening is delayed with the low oxygen concentration.
Number of references: 14
Main heading: Quality control
Controlled terms: Atmospheric humidity - Concentration (process) - Humidity control - Oxygen - Physiology
Uncontrolled terms: Agaricus bisporus - Controlled atmosphere storage - Low oxygen - Low temperatures - Oxygen concentrations - Reduction of oxygen - Relative humidities - Soluble solids - Storage quality
Classification code: 913.3 Quality Assurance and Control - 804 Chemical Products Generally - 802.3 Chemical Operations - 643.3 Air Conditioning - 461.9 Biology - 443.1 Atmospheric Properties - 402 Buildings and Towers
DOI: 10.3969/j.issn.1000-1298.2010.04.023
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
4. Accession number: 20102212966608
Title: Multi-objective fuzzy reliability optimization design of tractor's final transmission
Authors: Ye, Bingliang1 ; Yu, Gaohong1 ; Zhao, Yun1
Author affiliation: 1 College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
Corresponding author: Zhao, Y. (zhaoyun@zstu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 95-100
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Fuzzy mathematics, reliability theory and multi-objective optimization technology were applied to design tractor's final transmission with external single-stage spur gear based on comprehensive consideration on its loading capacity, structure, tooth face wear and transmission efficiency. The mathematical model for the multi-objective reliability optimization design was set up under the objective of the minimal volume and gears' maximal sliding coefficients, and the maximal efficiency of the mechanism, with the design variable of module, teeth number of the pinion, teeth width and meshing angle. Then, the fuzzy solution of multi-objective optimization and genetic algorithm were used to solve this model. On the premise of ensuring the maximal sliding coefficient below the allowable value, the final transmission's volume reduces by 1.55% and 6.74% of the common reliability optimization and original design scheme respectively, and the efficiency improves.
Number of references: 15
Main heading: Multiobjective optimization
Controlled terms: Dentistry - Gear teeth - Genetic algorithms - Machine design - Mathematical models - Quality assurance - Reliability theory - Spur gears - Tractors (agricultural) - Tractors (truck)
Uncontrolled terms: Design variables - Fuzzy mathematics - Fuzzy reliability - Loading capacities - Meshing angles - Multi objective - Original design - Reliability optimization - Single stage - Transmission efficiency
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 913.3 Quality Assurance and Control - 821.1 Agricultural Machinery and Equipment - 723 Computer Software, Data Handling and Applications - 922.2 Mathematical Statistics - 663.1 Heavy Duty Motor Vehicles - 601 Mechanical Design - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering - 601.2 Machine Components
DOI: 10.3969/j.issn.1000-1298.2010.04.020
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
5. Accession number: 20102212966628
Title: Singular loci analysis of 3SPS1S spatial rotation parallel manipulator
Authors: Zhang, Yanwei1 ; Cui, Guohua1 ; Sun, Zhenjun1 ; Zhang, Zhanqiang2
Author affiliation: 1 College of Mechanical Engineering, Hebei Engineering University, Handan 056038, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: Cui, G. (ghcui2007@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 199-203
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Singularity is an inherent nature of mechanism, which make a significant impact on mechanism's work performance. The singularity loci of a spatial rotation 3SPS1S parallel mechanism was studied. The parallel robot kinematics model was constructed. The equations for inverse displacement and velocity kinematics were derived, and the Jacobian matrix of this mechanism was analyzed. The singularity criterion was proposed, and two types of singularity were determined to be singular configuration. Manipulability degree was introduced to evaluate kinematical performance of the parallel manipulator for the singularity loci analysis. The results showed that the parallel mechanism has a good manageability and kinematics performance in the specified task space, but the special motion position should be turned away to avoid the occurrence of singularity.
Number of references: 10
Main heading: Manipulators
Controlled terms: Equations of motion - Kinematics - Magnetoelectric effects - Mathematical models - Mechanisms - Rotation
Uncontrolled terms: Kinematical performance - Manipulability - Parallel manipulators - Parallel mechanisms - Parallel robots - Significant impacts - Singular configurations - Singular loci - Singular locus - Singularity loci - Spatial rotation - Task space - Velocity kinematics - Work performance
Classification code: 931.1 Mechanics - 921.2 Calculus - 921 Mathematics - 731.5 Robotics - 701.2 Magnetism: Basic Concepts and Phenomena - 701.1 Electricity: Basic Concepts and Phenomena - 691.1 Materials Handling Equipment - 601.3 Mechanisms - 601.1 Mechanical Devices
DOI: 10.3969/j.issn.1000-1298.2010.04.040
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
6. Accession number: 20102212966607
Title: Model transformation of agricultural equipment in virtual reality
Authors: Hu, Lijiao1 ; Chen, Jun1 ; Zhu, Zhongxiang2 ; Mao, Enrong2 ; Song, Zhenghe2 ; Yang, Bingnan3
Author affiliation: 1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
3 State Key Laboratory of Soil Plant Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Hu, L. (hu-lijiao@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 90-94
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The methods for interface technology of agricultural equipment model on virtual reality were researched. Several typical methods of the modeling technology were compared and discussed. The model transformation was achieved from UG to Creator through the secondary development based on UG and Creator. Meanwhile, in the process of transformation, the model was simplified or refined through the various control parameters. Finally the agricultural equipment model on virtual reality was built.
Number of references: 11
Main heading: Virtual reality
Controlled terms: Control system analysis - Equipment
Uncontrolled terms: Agricultural equipment - Control parameters - Interface technology - Model transformation - Modeling technology - Secondary development
Classification code: 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 901 Engineering Profession
DOI: 10.3969/j.issn.1000-1298.2010.04.019
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
7. Accession number: 20102212966626
Title: Analysis and modeling of GPS positioning error for navigation of agricultural machinery
Authors: Zhou, Jun1 ; Zhang, Peng1 ; Song, Baihua1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Zhou, J. (zhoujun@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 189-192 198
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The GPS positioning error and its correlation were analyzed, and then corresponding static and dynamic error were described as AR model by using time series methods. Finally, the process for dealing with the positioning error in navigation was presented, and the experiment was carried out with self-made agricultural robot. The experimental results showed that the proposed approach improves the positioning precision of GPS, and the correlation within the positioning error is decreased, similar to white noise. The average value of positioning error is reduced to -0.0022m from 0.1951m. So it can be applied to achieve high precision navigation of agricultural machinery.
Number of references: 7
Main heading: Navigation
Controlled terms: Agricultural machinery - Time series
Uncontrolled terms: Agricultural robot - Analysis and modeling - AR models - Average values - GPS navigation - GPS positioning - High precision - Positioning error - Positioning precision - Static and dynamic - Time series method
Classification code: 431.5 Air Navigation and Traffic Control - 434.4 Waterway Navigation - 655.1 Spacecraft, General - 716.3 Radio Systems and Equipment - 821.1 Agricultural Machinery and Equipment - 922.2 Mathematical Statistics
DOI: 10.3969/j.issn.1000-1298.2010.04.038
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
8. Accession number: 20102212966600
Title: Virtual design and kinetic simulation for eight claw intra-row mechanical weeding device
Authors: Zhang, Pengju1 ; Zhang, Wen2 ; Chen, Shuren1 ; Yin, Jianjun1 ; Li, Shuang1 ; Zhou, Enquan1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
2 Zhenjiang Vocational College of Technology, Zhenjiang 212003, China
Corresponding author: Chen, S. (srchen@uje.edu)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 56-59 94
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An intra-row mechanical weeding device was designed. The device is one part of intelligent weeding machine. It has eight hoes that could turn in or turn out of intra-row area in the intelligent control system to eliminate the intra-row weeds. A 3-D parametric model of intra-row mechanical weeding device was built up with Pro/E, and was input ADAMS. The device was simulated on kinematics by ADAMS to get the track of each hoe. By analyzing the tracks, the area for each hoe with the superposition of adjacent hoe were figure out. Based on analysis result, the optimal proportion of rotation speed and forward speed was obtained (λ=0.754). Simulation proved that the device could satisfy the need of intra-row weeding.
Number of references: 10
Main heading: Design
Controlled terms: Agricultural implements - Three dimensional
Uncontrolled terms: Analysis results - Forward speed - Kinetic simulation - Mechanical weeding - Parametric models - Rotation speed - Virtual design - Weeding machines
Classification code: 408 Structural Design - 723.5 Computer Applications - 821.1 Agricultural Machinery and Equipment - 902.1 Engineering Graphics
DOI: 10.3969/j.issn.1000-1298.2010.04.012
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
9. Accession number: 20102212966623
Title: Feature selection for cotton foreign fiber objects based on improved genetic algorithm
Authors: Yang, Wenzhu1, 2 ; Li, Daoliang2 ; Wei, Xinhua3 ; Kang, Yuguo4 ; Li, Futang4
Author affiliation: 1 College of Mathematics and Computer Science, Hebei University, Baoding 071002, China
2 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
3 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
4 China Cotton Machinery and Equipment Co., Ltd, Beijing 100089, China
Corresponding author: Li, D. (dliangl@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 173-178
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An optimal feature subset selection method based on improved genetic algorithm (IGA) was presented. A novel scheme named segmented chromosome management was adopted in IGA. This scheme encodes the chromosome in binary as a whole while separates it logically into three segments for local management. These three segments are segment C for color feature, segment S for shape feature and segment T for texture feature separately. A segmented crossover operator and a segmented mutation operator are designed to operate on these segments to generate new chromosomes. These two operators avoid invalid chromosomes, thus improve the search efficiency extremely. The probabilities of crossover and mutation are adjusted automatically according to the generation number and the fitness value. By this way, the IGA could obtain strong search ability at the beginning of the evolution and achieve accelerated convergence along evolution. The experiment results indicate that IGA has stronger search ability and faster convergence speed than the simple genetic algorithm (SGA). The optimal feature subset that the IGA obtained has much smaller size than that of the SGA did, so it is more suitable for the online classification of foreign fibers.
Number of references: 16
Main heading: Feature extraction
Controlled terms: Chromosomes - Convergence of numerical methods - Cotton - Fibers - Genetic algorithms - Optimization
Uncontrolled terms: Accelerated convergence - Color features - Crossover and mutation - Crossover operator - Faster convergence - Feature selection - Feature subset - Feature subset selection - Fitness values - Foreign fiber - Generation numbers - Improved genetic algorithm - Improved genetic algorithms - Local management - Mutation operators - Objects-based - On-line classification - Search efficiency - Shape features - Simple genetic algorithm - Texture features
Classification code: 921.6 Numerical Methods - 817 Plastics and Other Polymers: Products and Applications - 819.1 Natural Fibers - 819.4 Fiber Products - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques - 812 Ceramics, Refractories and Glass - 741.1 Light/Optics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 461.2 Biological Materials and Tissue Engineering - 751.1 Acoustic Waves
DOI: 10.3969/j.issn.1000-1298.2010.04.035
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
10. Accession number: 20102212966610
Title: Anaerobic digestion characteristics for air-dried food waste
Authors: Wang, Yanchang1 ; Yuan, Qiaoxia1 ; Xie, Jinghuan1 ; Guo, Congying1
Author affiliation: 1 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Yuan, Q. (qxyuan@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 105-109
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Under high temperature condition, the effects of inoculation rates and moisture contents on anaerobic digestion of air-dried food waste were studied. The results showed that air-dried food waste could effectively alleviate the acidosis at the initial acidification phase. The interaction of inoculation rates and moisture contents makes an impact on the methane production. High inoculation rate and low moisture content is advantage to anaerobic digestion of air-dried food waste which gives the system a higher buffer capacity. When the inoculation rate is 55% and the moisture content is 92%, the process of anaerobic digestion operates normally with the methane production rate of 0.246L/g. The highest methane production rate reaches to 0.471L/g at 75% inoculation rate and 88% moisture content. The removal rates of COD and TS increase with inoculation rate, and the highest is 91.6% and 32.7%, respectively.
Number of references: 18
Main heading: Anaerobic digestion
Controlled terms: Curing - Fermentation - Methane - Moisture - Moisture determination - Solar dryers
Uncontrolled terms: Anaerobic fermentation - Buffer capacity - Dried food - Food waste - High temperature condition - Methane production - Moisture content - Moisture contents - Removal rate
Classification code: 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 805.1.1 Biochemical Engineering - 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 944.2 Moisture Measurements - 801.4 Physical Chemistry - 443.1 Atmospheric Properties - 452.4 Industrial Wastes Treatment and Disposal - 461.8 Biotechnology - 461.9 Biology - 522 Gas Fuels - 657.1 Solar Energy and Phenomena - 801.2 Biochemistry
DOI: 10.3969/j.issn.1000-1298.2010.04.022
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
11. Accession number: 20102212966612
Title: Effect of irradiation on budding inhibition and endogenous hormones content of embryo of fresh walnut
Authors: Ma, Yanping1 ; Liu, Xinghua2 ; Li, Yingchao2 ; Li, Xiaodong2
Author affiliation: 1 College of Forestry, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Food Science and Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Liu, X. (liuxh2830@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 114-118
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to investigate the effect of irradiation on the sprout inhibition and the relationship between endogenous hormones and germination of embryo for fresh walnut, the germination rate and changes of endogenous hormones of embryo for 'Liaohe4' fresh walnut were studied, which were exposed to 60Co γ-radiation at different dose and stored at the room temperature (20±3)°C and at the constant temperature (27±1)°C after being stored at (0±1)°C for 30d. The results showed, at the two storage conditions, the control sprouts at the 20d and 12d respectively, accompanied by ABA content decreased, by the increase of the content of GA3, IAA, ZR and the ratio of w(GA3)/w(ABA), w(IAA)/w(ABA) and w(ZR)/w(ABA), with the largest decreasing and increasing rate against control group. It is proved that endogenous hormone ABA is an inhibitory substance, and GA3, IAA, ZR are simulative material during the process of germination, the germination of embryo of fresh walnut is completely inhibited with the radiation dose of 0.05kGy.
Number of references: 12
Main heading: Radiation
Controlled terms: Endocrinology - Hormones - Irradiation
Uncontrolled terms: Budding inhibition - Constant temperature - Control groups - Endogenous hormones - Germination rates - Radiation dose - Room temperature - Storage condition
Classification code: 932.1 High Energy Physics - 801.2 Biochemistry - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 711 Electromagnetic Waves - 657.1 Solar Energy and Phenomena - 622.2 Radiation Effects - 461.6 Medicine and Pharmacology - 461.2 Biological Materials and Tissue Engineering
DOI: 10.3969/j.issn.1000-1298.2010.04.024
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
12. Accession number: 20102212966605
Title: Experiment on 4HLB2 type half feed peanut combine harvester
Authors: Hu, Zhichao1 ; Wang, Haiou1 ; Wang, Jiannan1 ; Hu, Lianglong1 ; Tian, Lijia1 ; Zhong, Ting1
Author affiliation: 1 Nanjing Research Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author: Hu, Z. (nfzhongzi@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 79-84
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve the operation performance of 4HLB2 peanut combine harvester, the impact factors including soil moisture content, harvest time, stalk clamping height, clapping frequency and amplitude of clod removing unit, rotate speed of peanut picking roller and clamping chain speed were investigated by single or double factorial experiments. The results show that soil moisture content ranging from 8% to 15% is suitable for peanut harvesting in sandy loam soil. Dropped peanut loss during clod removing increases gradually along with the delaying of harvest time. The dropped peanut loss rate is higher than 2% under the snap force of peanut root below 5N. The optimum stalk clamping height is in the range from 150mm to 200mm, keeping total loss rate and clod content less than 6% and 4%, respectively. Lower frequency and smaller amplitude of clod clapping operation contributes to smaller dropped peanut loss rate, but higher clod content, whereas, higher frequency and larger amplitude contributed to lower clod content and higher dropped peanut loss rate. The peanut loss of peanut picking operation is kept at lower level with higher picking roller speed and lower clamping chain speed. In this experiment, loss rate of peanut picking is 2.79% at 390r/min of picking roller speed and 0.5m/s of clamping chain speed.
Number of references: 5
Main heading: Harvesters
Controlled terms: Experiments - Harvesting - Moisture determination - Optimization - Rollers (machine components) - Soil moisture - Speed
Uncontrolled terms: Combine harvester - Combine harvesters - Factorial experiment - Harvest time - Higher frequencies - Impact factor - Loss rates - Lower frequencies - Operation performance - Parameters optimization - Roller speed - Rotate speed - Sandy loam soils - Soil moisture content - Total loss
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 901.3 Engineering Research - 944.2 Moisture Measurements - 821.3 Agricultural Methods - 601.2 Machine Components - 483.1 Soils and Soil Mechanics - 821.1 Agricultural Machinery and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.04.017
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
13. Accession number: 20102212966604
Title: Design and experiment of 4GZ56 caterpillar sugarcane combine
Authors: Zhou, Yong1, 2 ; Ou, Yinggang1 ; Peng, Kangyi3 ; Xie, Fuxiang1 ; Mou, Xiangwei1 ; Mo, Zhaofu1
Author affiliation: 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
2 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
3 Guangzhou KOLEA Agricultural Machines Co., Ltd., Guangzhou 510545, China
Corresponding author: Ou, Y. (ouying@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 75-78
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A kind of sugarcane segmentation combine on the basis of assimilation and absorption of imported advanced sugarcane harvester technology was designed. The machine could finish the processes of separating sugarcanes in different rows, cutting cane at bottom, conveying sugarcane, cutting sugarcane into segments, eliminating trash by air classification, and gathering sugarcane segments in a bag in one pass. The designs on main devices of these processes were introduced. Field tests were done to measure the main performance indexes of a prototype. The results were that total loss factor was 2.25%, broken biennial root rate was 11.3%, dirt percentage was 7.75%, segments percent of pass 94.55%, and cutting-height percent of pass 94.3%. The results showed that this prototype could smoothly work in the field where serious lodging sugarcane existed, and all main parameters reached their design requirements. The development of this sugarcane harvester provides a kind of practical sugarcane combine.
Number of references: 9
Main heading: Design
Controlled terms: Cutting - Feeding - Harvesters - Sprockets - Wheels
Uncontrolled terms: Bagging gathering - Chain sprockets - Classification , - Design requirements - Double base cutter - Field test - Intermittent chain sprocket - Main parameters - One-pass - Performance indices - Total loss
Classification code: 902.1 Engineering Graphics - 821.1 Agricultural Machinery and Equipment - 691.2 Materials Handling Methods - 606.2 Abrasive Devices and Processes - 604.1 Metal Cutting - 601.2 Machine Components - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.04.016
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
14. Accession number: 20102212966614
Title: Judgment of freeze-drying process based on drying dynamical characteristics
Authors: Cui, Qingliang1 ; Guo, Yuming1 ; Zheng, Decong1
Author affiliation: 1 College of Engineering, Shanxi Agricultural University, Taigu 030801, China
Corresponding author: Cui, Q. (QLcui@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 124-127
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: It is of great significance for optimal controlling the freeze-drying process to determine the end of sublimation drying and desorption. The drying dynamical characteristics test for Fuji apple were carried out using the JDG0.2 type vacuum freeze-drying machine. Based on the homemade real-time online measurement system, the moisture content of apple blocks was measured, and the changing curve was drawn during the freeze-drying process. According to the measured data, the freeze-drying dynamical characteristics were analyzed, the judgment method for the end of sublimation drying and desorption was proposed. It provides the means for optimal controlling parameters during the freeze-drying process.
Number of references: 14
Main heading: Curing
Controlled terms: Desorption - Low temperature drying - Optimization - Sublimation
Uncontrolled terms: Controlling parameters - Drying machines - Dynamical characteristics - Freeze-drying process - Fuji apple - Judgment - Judgment method - Measured data - Moisture contents - On line measurement system
Classification code: 802.2 Chemical Reactions - 802.3 Chemical Operations - 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 921.5 Optimization Techniques
DOI: 10.3969/j.issn.1000-1298.2010.04.026
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
15. Accession number: 20102212966596
Title: Experiment on sandy fixation material based on liquefied corn stover to decrease wind erosion
Authors: Wang, Tipeng1 ; Mao, Zhihuai2
Author affiliation: 1 National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Mao, Z. (maozhh@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 36-40
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: As sandy fixation materials to protect building residue soil (BRS) from wind erosion, liquefied corn stover (LCS) and polyurethane based on LCS were investigated by a wind tunnel. The results indicated that various particles on the soil surface are connected by LCS or polyurethane to form a protective crust which increases the soil resistance to wind erosion. At a low spraying amount of LCS, with an increase of wind speed, the protective action of LCS to the BRS disappears gradually due to low mechanical strength of LCS crust, and wind erosion ratio widely increases. Compared with LCS, the polyurethane is a more effective sandy fixation material. The threshold wind velocity of BRS is morn than 20m/s at a polyurethane spraying amount of 120.37g/m2; at a same protective action, the amounts of polyurethane used is a half of LCS's. Moreover, at a high wind speed, the protective action of polyurethane is still good due to a more mechanical strength of polyurethane crust.
Number of references: 19
Main heading: Soil liquefaction
Controlled terms: Materials - Soil mechanics - Soils - Wind effects
Uncontrolled terms: Corn stover - High wind speed - Mechanical strength - Protective action - Soil resistance - Soil surfaces - Soil wind erosion - Wind erosions - Wind speed - Wind velocities
Classification code: 408.1 Structural Design, General - 443.1 Atmospheric Properties - 483.1 Soils and Soil Mechanics - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.04.008
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
16. Accession number: 20102212966615
Title: Testing of grain hardness based on indentation loading curve
Authors: Zhang, Fengwei1, 2 ; Zhao, Chunhua1 ; Guo, Weijun3 ; Zhao, Wuyun1 ; Feng, Yongzhong4 ; Han, Zhengsheng2
Author affiliation: 1 Engineering College, Gansu Agricultural University, Lanzhou 730070, China
2 College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
3 Department of Mechanical Engineering, Lanzhou Polytechnical College, Lanzhou 730050, China
4 College of Agronomy, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Han, Z. (hanzhengsheng@gsau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 128-133
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: By using the 500N microcomputer control material testing machine, based on the load-depth curve, the hardness of the grains was experimentally studied adopting needlepoint pressing-in method. The peas, horsebeans, rice, mung beans, wheat, lentils as well as corn at different moisture and component parts were tested and analyzed, with the measured hardness range of 2-75MPa. The research showed that at the loading speed in 0.25-2.00mm/s and depth of indentation in 0.25-1.50mm, no obvious effect appears in the test results. The taper of needlepoint and the value of grain hardness have a quantitative relation in the measurement.
Number of references: 19
Main heading: Hardness testing
Controlled terms: Grain (agricultural product) - Hardness - Load testing
Uncontrolled terms: Cereal grains - Component part - Depth curve - Depth of indentations - Grain hardness - Loading curves - Loading speed - Microcomputer control - Mungbeans - Quantitative relations - Test results
Classification code: 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 483.1 Soils and Soil Mechanics - 821.4 Agricultural Products - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.04.027
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
17. Accession number: 20102212966629
Title: Adaptive control of hybrid machine based on RBF neural network
Authors: Li, Renjun1 ; Liu, Hongzhao2 ; Yuan, Daning2
Author affiliation: 1 School of Mechanical Engineering, Anhui University of Technology and Science, Wuhu 241000, China
2 Faculty of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Li, R. (lrjlunwen@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 204-208
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The precision of trajectory tracking of hybrid machine was debased because of velocity fluctuation in constant velocity motor and uncertainties in the system. The strategy for control servo motor grounded on tracking the motion was proposed, to compensate the velocity fluctuation of constant velocity motor. Considering the uncertainties of the system, an adaptive sliding mode controller based on RBF neural network was designed for trajectory tracking of hybrid machine. The sum of uncertainties of the system was compensated by control gain with RBF neural network, and the output weight of in network was adjusted by adaptive algorithm. The simulation result indicated the robustness and effectiveness of the controller.
Number of references: 8
Main heading: Adaptive control systems
Controlled terms: Adaptive algorithms - Attitude control - Controllers - Fuzzy control - Neural networks - Radial basis function networks - Trajectories - Velocity
Uncontrolled terms: Adaptive Control - Adaptive sliding mode controller - Constant velocities - Control gains - Hybrid machine - In-network - RBF Neural Network - Simulation result - Trajectory control - Trajectory tracking - Velocity fluctuations
Classification code: 931.1 Mechanics - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 732.1 Control Equipment - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 655.2 Satellites - 654.1 Rockets and Missiles - 652.3 Aircraft Instruments and Equipment - 461.1 Biomedical Engineering - 404.1 Military Engineering - 656.1 Space Flight
DOI: 10.3969/j.issn.1000-1298.2010.04.041
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
18. Accession number: 20102212966609
Title: Two-step gasification technology of biomass in fixed bed
Authors: Yan, Guihuan1 ; Sun, Rongfeng1 ; Xu, Min1 ; Guan, Haibin1 ; Zhang, Weijie2 ; Li, Xiaoxia2
Author affiliation: 1 Energy Research Institute, Shandong Academy of Sciences, Ji'nan 250014, China
2 Key Laboratory for Biomass Gasification Technology of Shandong Province, Ji'nan 250014, China
Corresponding author: Yan, G. (yanguihuan@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 101-104
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A novel and efficient low-tar gasification technology was put forward based on the mechanics of tar generation and pyrolysis. This technology contains such two separate sub-process as pyrolysis occurring between 350°C and 500°C, and gasification reacting in the high temperature condition about 1000°C. The high-temperature gasification ensures the tar pyrolyze into small molecule non-condensable gases with the equivalence ratio of gasification agent about 0.3. As a result, the quality of biogas is highly improved and the mass concentration of original tar in the biogas is significantly reduced below 20mg/m3.
Number of references: 14
Main heading: Gasification
Controlled terms: Biogas - Biomass - Gas generators - Pyrolysis - Tar - Thermogravimetric analysis
Uncontrolled terms: Equivalence ratios - Fixed bed - Gasification technologies - High temperature condition - High-temperature gasification - Low tar - Mass concentration - Non-condensable gas - Small molecules - Two-step gasification
Classification code: 805.1.1 Biochemical Engineering - 804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 821.5 Agricultural Wastes - 801 Chemistry - 524 Solid Fuels - 522 Gas Fuels - 513 Petroleum Refining - 411 Bituminous Materials - 525.1 Energy Resources and Renewable Energy Issues
DOI: 10.3969/j.issn.1000-1298.2010.04.021
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
19. Accession number: 20102212966589
Title: Study on fuel-air matching forms in burner-type diesel particulate filter
Authors: Gong, Jinke1, 2 ; Yu, Xuan1 ; Fu, Jun1 ; Liu, Yunqing1 ; Yu, Mingguo1
Author affiliation: 1 College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
2 State Key Laboratory of Advanced Design and Manufactory for Vehicle Body, Hunan University, Changsha 410082, China
Corresponding author: Gong, J. (gongjinke@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 1-5
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on self designed burner-type system diesel particulate filter (DPF), the temperature of both gas in burner mixed with combusted combustion gas by several fuel-air matching forms and diesel exhaust gas was experimentally studied. The pyrogenation regeneration model for a channel of DPF was used to obtain the regeneration computational result, which is verified to match with experimental results well. Further, according to simulation results, the problem of fuel-air matching forms on idle condition was analyzed in regeneration performance requirements, such as wall maximum temperature, temperature gradient, regeneration time and so on, to achieve the reasonable matching for burner-type DPF.
Number of references: 9
Main heading: Air filters
Controlled terms: Fuel filters - Fuels
Uncontrolled terms: Combustion gas - Computational results - Diesel - Diesel exhausts - Diesel particulate filter - Diesel particulate filters - Idle condition - Maximum temperature - Pyrogenation - Regeneration model - Regeneration performance - Regeneration time - Simulation result - Temperature gradient - Type systems
Classification code: 451.2 Air Pollution Control - 521.3 Fuel Burners - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 802.1 Chemical Plants and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.04.001
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
20. Accession number: 20102212966603
Title: Mechanical analysis and experiment on effuser with turning angle for complete fluidic sprinkler
Authors: Zhu, Xingye1 ; Yuan, Shouqi1 ; Li, Hong1 ; Liu, Junping1
Author affiliation: 1 Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Zhu, X. (xingye488@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 69-74
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To enlarge the scope of working pressure for complete fluidic sprinkler, turning angle was applied in the effuser, which can increase intrinsic driving moment. The important geometrical parameters for the turning angle effuser included angle and arm of force. The equations of total driving moment and stepping angle were deduced. Experiments were carried out on seven types of effusers with different turning angles or arms of force. The results showed that testing value agrees well with the theoretical analyzing. Working pressure, with a small infection on stepping angle, positively influences wetted diameter, uniformity coefficient and stepping frequency. Turning angle positively influences stepping angle and uniformity coefficient, and negatively influenced stepping frequency. Turning arm of force positively influenced stepping angle, negatively influenced wetted diameter.
Number of references: 13
Main heading: Turning
Controlled terms: Experiments - Wetting
Uncontrolled terms: Complete fluidic sprinkler - Geometrical parameters - Mechanical analysis - Stepping frequencies - Turning angles - Working pressures
Classification code: 604.2 Machining Operations - 802.3 Chemical Operations - 901.3 Engineering Research - 931.2 Physical Properties of Gases, Liquids and Solids
DOI: 10.3969/j.issn.1000-1298.2010.04.015
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
21. Accession number: 20102212966602
Title: Spatial analysis of droplets deposition distribution
Authors: Qiu, Baijing1 ; Zhang, Zhenlei1 ; Tang, Bomin2 ; Zhao, Xiaoli1 ; Li, Chengquan1
Author affiliation: 1 Key Laboratory of Modern Agicultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
2 Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author: Qiu, B. (qbj@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 65-68 74
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A new method for spatial analysis of droplet deposition was presented, by which the parameters of spraying deposition in greenhouse were analyzed, including droplets equivalent diameter, spraying coverage and droplets density. The experimental results showed that the droplets equivalent diameter and spraying coverage is larger in both sides than central axis of the greenhouse, while droplets density is opposite. The peak value of droplets equivalent diameter and spraying coverage respectively appears in both sides of the greenhouse 25m away from entrance, and three peak values of droplets density occur in central axis of the greenhouse with the distance of 13, 35 and 52m from entrance, respectively. The results also indicated that the method of spatial analysis can more objectively reflect the droplets deposition distribution in greenhouse by contrast to simple curve analysis.
Number of references: 15
Main heading: Drop formation
Controlled terms: Deposition - Fog dispersal - Greenhouses - Vehicular tunnels
Uncontrolled terms: Central axis - Curve analysis - Deposition distribution - Droplet deposition - Equivalent diameter - Peak values - Spatial analysis
Classification code: 821.6 Farm Buildings and Other Structures - 813.1 Coating Techniques - 802.3 Chemical Operations - 539.3 Metal Plating - 931.2 Physical Properties of Gases, Liquids and Solids - 443.1 Atmospheric Properties - 431.4 Airports - 402.1 Industrial and Agricultural Buildings - 401.2 Tunnels and Tunneling - 432 Highway Transportation
DOI: 10.3969/j.issn.1000-1298.2010.04.014
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
22. Accession number: 20102212966630
Title: Uniformity of kinematic trajectory with wafer driving initiatively in plane lapping process
Authors: Sheng, Jisheng1 ; Wen, Donghui2 ; Ji, Shiming2
Author affiliation: 1 School of Mechanical and Electrical Enginerring, Jinhua College of Profession and Technology, Jinhua 321017, China
2 Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou 310032, China
Corresponding author: Sheng, J. (shjs@jdxy.jhc.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 209-212 221
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Kinematic characteristic of wafer driving initiatively in plane lapping process was analysised based on the model of lapping geometry. A new rule was deduced for evaluate the uniformity of lapping trajectory by trajectory numbers of each unit wafer area. The effects of rotating ratio and eccentricity on the uniformity of the lapping trajectory were theoretically analysed. Lower eccentricity is helpful to improve the trajectory uniform distribution, for the errors of the relative rotating speed are augmented with large eccentricity. Forever, improvement of rotating ratio is also to enlarge the standard deviation of trajectory points in the same area, and make a bad uniformity. The same angular velocity for lapping plate as wafer is recommended to improve the trajectory uniformity.
Number of references: 8
Main heading: Lapping
Controlled terms: Kinematics - Lapping machines - Rotation - Trajectories
Uncontrolled terms: Driving initiative - In-plane - Kinematic characteristics - Kinematic trajectories - Plane lapping - Rotating speed - Standard deviation - Trajectory points - Uniform distribution
Classification code: 655.2 Satellites - 654.1 Rockets and Missiles - 606.2 Abrasive Devices and Processes - 931.1 Mechanics - 604.2 Machining Operations - 601.1 Mechanical Devices - 404.1 Military Engineering - 603.1 Machine Tools, General
DOI: 10.3969/j.issn.1000-1298.2010.04.042
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
23. Accession number: 20102212966594
Title: Fluid-solid coupling numerical simulation on flow and boiling heat transfer of cooling water-jacket in cylinder head of diesel engine
Authors: Fu, Song1 ; Hu, Yuping1 ; Li, Xincai2 ; Chen, Zhizhong2 ; Li, Guoxiang1 ; Pan, Jihong1
Author affiliation: 1 School of Energy and Power Engineering, Shandong University, Ji'nan 250061, China
2 Shanghai Marine Diesel Engine Research Institute, CSIC, Shanghai 201108, China
Corresponding author: Hu, Y. (huyp@sdu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 26-30
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Fluid-solid coupling numerical simulation on the flow and heat transfer of cooling water-jacket in cylinder head for 226B diesel engine was performed using the commercial CFD software STAR-CD and the FEA software ABAQUS. In order to consider the influence of boiling heat transfer, a boiling heat transfer model was developed based on FORTRAN and built into STAR-CD. Comparison between simulation and experiment showed that the two results are in good agreement with each other. Comparing with the results of simulation without the boiling heat transfer model, maximum deviation drops from 18% to 7%. So the simulation provides a more dependable theoretical evidence for diesel water-jacket optimization.
Number of references: 12
Main heading: Mathematical models
Controlled terms: Computational fluid dynamics - Computer software - Cooling - Cooling water - Diesel engines - Engine cylinders - Flow simulation - Fluids - Heat exchangers - Water cooling systems
Uncontrolled terms: Boiling heat transfer - CFD softwares - Cylinder head - FEA software - Flow and heat transfer - Fluid-solid coupling - Fortran - Numerical simulation - On flow - STAR-CD
Classification code: 723.5 Computer Applications - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 931.1 Mechanics - 932.2 Nuclear Physics - 921.6 Numerical Methods - 641.2 Heat Transfer - 612.2 Diesel Engines - 616 Heat Exchangers - 616.1 Heat Exchange Equipment and Components - 612.1.1 Internal Combustion Engine Components - 631 Fluid Flow - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 631.1 Fluid Flow, General
DOI: 10.3969/j.issn.1000-1298.2010.04.006
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
24. Accession number: 20102212966621
Title: Automatic segmentation of touching corn kernels in digital image
Authors: Xun, Yi1 ; Bao, Guanjun1 ; Yang, Qinghua1 ; Gao, Feng1 ; Li, Wei2
Author affiliation: 1 Key Laboratory of Special Purpose Equipment and Advanced Processing Technology of Ministry of Edu., Zhejiang University of Technology, Hangzhou 310032, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Yang, Q. (robot@zjut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 163-167
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on public areas and contours of touching kernels, an approach to search segmentation points was developed, realizing automatic segmentation of touching corn kernels. For two touching kernels, the public area could be obtained in the process of continuous erosion-dilation. Non-closed curve segment was extracted by getting intersection of the public area and one kernel contour. The endpoints of the curve segment were segmentation points. Then the two touching kernels were separated by linking two segmentation points with Bresenham algorithm. For massive touching kernels, every single kernel could be stripped using the similar method. The experimental results on 100 touching kernels images showed that the correction rate of segmentation is 96%. The kernels after segmentation have small deformation and smooth boundaries.
Number of references: 12
Main heading: Image segmentation
Controlled terms: Algorithms - Imaging systems
Uncontrolled terms: Automatic segmentation - Automatic segmentations - Closed curve - Corn kernels - Curve segments - Digital image - Image process - Public areas - Single kernel - Smooth boundary
Classification code: 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 746 Imaging Techniques - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.04.033
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
25. Accession number: 20102212966627
Title: Quantitative characteristic features of geometric structures of claws of mole rat
Authors: Ji, Wenfeng1 ; Tong, Jin1 ; Jia, Honglei1 ; Chen, Donghui1 ; Liu, Caiyong1
Author affiliation: 1 Key Laboratory of Bionic Engineering, Jilin University, Changchun 130025, China
Corresponding author: Tong, J. (jtong@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 193-198
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Mole rat, as a typical soil-burrowing animal, has a high working efficiency in digging hole in earth, its fore claws are main digging organ. The geometric characteristics of the claws of mole rats(Scaptochirus moschatus) was analyzed by stereoscopy, the quantitative analysis of geometrically characteristic features of the surfaces was performed by reverse engineering, and the second derivative and curvature of the surface profile curves were calculated. The curvature variation of longitudinal profile of claw changes gently and the longitudinal surface was smooth, which assures the tidiness of inner wall when mole rat dug holes. The curvature variation of transverse fitted curves shows a rapid change, and the bending of the transverse fitted curves increase from tip to rear, this kind of structure is easier for cutting in and hole-enlarging. The results provide some information for the design of the soil-cutting tools and excavation tools in energy-saving property and cutting efficiency.
Number of references: 9
Main heading: Cutting tools
Controlled terms: Animals - Cutting - Energy conservation - Reengineering - Reverse engineering - Soils
Uncontrolled terms: Curvature variation - Cutting efficiency - Energy saving - Excavation tools - Geometric characteristics - Geometric structure - Geometrically characteristic feature - Inner walls - Longitudinal profile - Quantitative analysis - Quantitative characteristics - Rapid changes - Second derivatives - Surface profiles - Typical soils - Working efficiency
Classification code: 913.3 Quality Assurance and Control - 606.2 Abrasive Devices and Processes - 723 Computer Software, Data Handling and Applications - 814 Leather and Tanning - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 822 Food Technology - 912.2 Management - 605 Small Tools and Hardware - 603.2 Machine Tool Accessories - 525.2 Energy Conservation - 483.1 Soils and Soil Mechanics - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 604.1 Metal Cutting
DOI: 10.3969/j.issn.1000-1298.2010.04.039
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
26. Accession number: 20102212966592
Title: Experiment on homogeneous charge combustion characteristics of direct-injection spark-ignition methanol engine
Authors: Li, Benzheng1, 2 ; Liu, Shenghua1 ; Liu, Jie1 ; Li, Yi1
Author affiliation: 1 School of Energy and Power Engineering, Xian Jiaotong University, Xi'an 710049, China
2 Ordnance and Automobile Artificers Training Regiment, Beijing Garrison, Shijiazhuang 050081, China
Corresponding author: Li, B. (benz@stu.xjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 16-19 118
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For a direct-injection spark-ignition (DISI) methanol engine retrofitted from a four-cylinder diesel engine, fuel is injected into the cylinder during the intake stroke to realize the homogeneous charge combustion for the high power output. The cylinder pressure of typical operating conditions was measured and analyzed. The effects of different parameters on methanol engine combustion characteristics were investigated. The results showed that the maximum power output and torque of the methanol engine are 5.88% and 20.90% higher than original diesel engine, respectively. The maximum brake thermal efficiency reaches 35.3% at a speed of 1500r/min, and a brake mean effective pressure of 0.85MPa, which is higher than the conventional gasoline engine. The ignition delay period and rapid combustion phase increase with decreasing load. The start of combustion is postponed with increasing speed at full load. The ignition delay period and rapid combustion phase increase with increasing speed under full load. The change of the cyclic variations has the approximate trend with that of the ignition delay period at different operating conditions.
Number of references: 9
Main heading: Ignition
Controlled terms: Brakes - Diesel engines - Electric sparks - Engine cylinders - Engines - Experiments - Methanol - Stratified charge engines
Uncontrolled terms: Brake mean effective pressures - Brake thermal efficiency - Combustion characteristics - Conventional gasoline - Cyclic variations - Cylinder pressures - Direct injection - Full-load - High power output - Ignition delays - Intake stroke - Maximum power output - Methanol engine - Operating condition - Start of combustion
Classification code: 901.3 Engineering Research - 804.1 Organic Compounds - 701.1 Electricity: Basic Concepts and Phenomena - 654.2 Rocket Engines - 617.3 Steam Engines - 612.2 Diesel Engines - 612.1.1 Internal Combustion Engine Components - 612.1 Internal Combustion Engines, General - 612 Engines - 602 Mechanical Drives and Transmissions - 521.1 Fuel Combustion
DOI: 10.3969/j.issn.1000-1298.2010.04.004
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
27. Accession number: 20102212966591
Title: Effect of EGR and intake hydrogen enrichment on performance and emissions of automotive diesel engine
Authors: Zuo, Chengji1 ; Qian, Yejian1 ; Xu, Tianyu1 ; Tan, Jian1
Author affiliation: 1 School of Machinery and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Zuo, C. (chengjizuo@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 12-15 40
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: This paper presented the feasibility of improving engine performance and pollutant emissions of a ZS195 diesel engine by EGR and intake hydrogen enrichment. At rated speed, the effects of EGR rate and hydrogen addition on the engine performance, pollutant emissions and economic characteristics were experimentally investigated. The results showed that when EGR rate is constant, peak pressure and maximum rate of pressure rise increase with hydrogen addition. The EGR and intake hydrogen enrichment can reduce HC, CO and smoke level, but the NOx emission increases. The combustion speed and thermal efficiency increase with the hydrogen addition when EGR technique is adopted.
Number of references: 10
Main heading: Hydrogen engines
Controlled terms: Diesel engines - Engines - Hydrogen - Machine design
Uncontrolled terms: Combustion speed - Economic characteristics - EGR - Engine performance - Hydrogen addition - Hydrogen enrichment - Peak pressure - Performance and emissions - Pollutant emission - Rate of pressure - Smoke levels - Thermal efficiency
Classification code: 804 Chemical Products Generally - 654.2 Rocket Engines - 617.3 Steam Engines - 612.3 Gas Turbines and Engines - 612.2 Diesel Engines - 612 Engines - 601 Mechanical Design
DOI: 10.3969/j.issn.1000-1298.2010.04.003
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
28. Accession number: 20102212966619
Title: Object locating method of laser-assisted machine vision for strawberry-harvesting
Authors: Zhang, Kailiang1 ; Yang, Li1 ; Zhang, Tiezhong1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Zhang, T. (zhangtz7@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 151-156
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An object locating method for strawberry-harvesting robot was proposed and evaluated in view of aimed at the "hill culture" planting pattern and characteristic of liable to damage for strawberry. The method includes two steps: "2-D information acquisition", during which "mirror-image match method" is used to locate the strawberry's fruit axis; "distance judgment between object and end-effector", in which laser is used to assist distance judgment. The experiment results showed that the system is suitable for locating long-conical strawberries. The average time required for locating the picking position is 381ms, the maximum measurement error of the distance is 1.6mm and the average error is 0.5mm.
Number of references: 9
Main heading: Fruits
Controlled terms: Computer vision - Harvesting - Location - Mirrors - Robots
Uncontrolled terms: Average errors - Harvesting robot - Image match - Information acquisitions - Laser-assisted - Machine vision - Target location
Classification code: 912 Industrial Engineering and Management - 911 Cost and Value Engineering; Industrial Economics - 821.4 Agricultural Products - 821.3 Agricultural Methods - 741.3 Optical Devices and Systems - 741.2 Vision - 731.6 Robot Applications - 731.5 Robotics - 723.5 Computer Applications
DOI: 10.3969/j.issn.1000-1298.2010.04.031
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
29. Accession number: 20102212966599
Title: Optimization design on pricking hole mechanism of deep-fertilization liquid fertilizer applicator
Authors: Wang, Jinfeng1 ; Wang, Jinwu1 ; Ge, Yiyuan1 ; Liu, Yahua1 ; Ju, Jinyan1
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. (jinwuw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 52-55
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to realize the high-speed work of liquid fertilizer applicator, the elliptic gear planetary galaxy as the pricking hole mechanism was designed, which presented the simple structure and steady movement. Then, the mathematical model for this mechanism was established. By Visual Basic 6.0 program, taken the distance between hole 200mm and buried depth 120-150mm as the optimization goal, the most optimum parameters range of the mechanism was obtained as follows: the initial angle between planet frame and the line formed from spraying-fertilizer needle-tip and planet wheel axle was -45°--40°, the initial angular displacement of planet frame was 40°-50°, the distance between spraying-fertilizer needle-tip and the planetary gear axle center was 280-300mm, simultaneously, the semi-major axis of elliptic gear was 29.364mm, the teeth quantity was 23, the ratio of semi-minor axes and semi-major axis was 0.958, the radius of circular gear was 25mm. Among the optimization operational parameters, a group of parameters were selected to design the pricking hole mechanism by using Pro/E simulation. The simulation result shows that the designed pricking hole mechanism can satisfy the design requirements of the distance between holes and the buried depth.
Number of references: 12
Main heading: Machine design
Controlled terms: Applicators - Axles - Fertilizers - Gear teeth - Geometry - Liquids - Mathematical models - Needles - Optimization - Wheels
Uncontrolled terms: Angular displacement - Buried depth - Design requirements - Elliptic gears - High-speed - Initial angle - Liquid fertilizer applicator - Liquid fertilizers - Operational parameters - Optimization design - Optimum parameters - Planetary Gears - Pricking hole - Semimajor axis - Simple structures - Simulation result - Visual Basic 6.0
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 821.2 Agricultural Chemicals - 819.6 Textile Mills, Machinery and Equipment - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 682.1.1 Railroad Cars - 662.4 Automobile and Smaller Vehicle Components - 601.2 Machine Components - 601 Mechanical Design - 462.1 Biomedical Equipment, General - 663.2 Heavy Duty Motor Vehicle Components
DOI: 10.3969/j.issn.1000-1298.2010.04.011
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
30. Accession number: 20102212966617
Title: Screening and optimization of cryoprotectants for bifidobacterium longum BBMN68
Authors: Liu, Songling1 ; Jiang, Jingli2 ; Liu, Aiping2 ; Guo, Huiyuan1 ; Leng, Xiaojing1 ; Ren, Fazheng1
Author affiliation: 1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2 Mengniu Dairy (Beijing) Company of Limited Liability, Beijing 101107, China
Corresponding author: Ren, F. (renfazheng@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 140-144
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To improve the protective efficacy of Bifidobacterium longum BBMN68, various cryoprotectants were evaluated and optimized. Based on its viability and activity after frozen, the effects of eighteen cryoprotectants belonging to four different types were evaluated. Six of them including skim milk, trehalose, fructose, glycerol, Vitamin C and L-Glu were proved to be effective. Then the complex formulas made of the six kinds of the selected compounds was optimized by using a quadratic regression orthogonal experiment. And the optimized composition is as follows: skim milk 8%, trehalose 5%, fructose 5%, glycerol 3%, Vitamin C 0.05% and L-Glu 0.05%. With the protection of the optimized cryoptotectans, the stability of starters is good with a stable logarithm value about 10.5 lg(cfu/mL) during storage, and when applied in yoghurt fermentation it presents an excellent performance, with a total counts of culturable cells above 107cfu/mL during 21 days of storage.
Number of references: 17
Main heading: Optimization
Controlled terms: Algebra - Fructose - Glycerol - Starters
Uncontrolled terms: Bifidobacterium longum - Cryoprotectant - Cryoprotectants - Excellent performance - Orthogonal experiment - Protective efficacy - Quadratic regression - Skim milks - Total counts - Vitamin C
Classification code: 921.1 Algebra - 822.3 Food Products - 804.1 Organic Compounds - 921.5 Optimization Techniques - 705.1 Electric Machinery, General - 617 Turbines and Steam Turbines - 612.1.1 Internal Combustion Engine Components - 661.2 Automotive Engine Components
DOI: 10.3969/j.issn.1000-1298.2010.04.029
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
31. Accession number: 20102212966606
Title: Experiment on biomechanical properties of bottom stems of forage in harvesting period
Authors: Zhao, Chunhua1, 2 ; Han, Zhengsheng2 ; Wang, Fen'e2 ; Cao, Zhizhong1 ; Shi, Shangli1
Author affiliation: 1 Pratacultural College, Gansu Agricultural University, Lanzhou 730070, China
2 Engineering College, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author: Cao, Z. (caozz@gsau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 85-89 100
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Four kinds of leguminous and gramineous forage stems in harvesting period were chosen to perform tensile experiments by the electronic testing machine CMT2502. The cellulose, lignin and protein content of forage stems in different conditions were tested. The microstructure was observed. The SEM images of transverse section were got by scanning electron microscopy. The results indicated that, the stress-strain curve of bottom stems obeyed Hooke's law; the tensile strength of Bromus inermis was higher than Coronilla varia, but the elastic was smaller; the tensile strength and cellulose contents of Coronilla varia were smallest (13.87%) in the four species. A forage stem is a natural anisotropic polymeric composite. The strength and stiffness of forage stems depends on the content, linking and sequence of cellulose and lignin, together with the thickness of thick-walled cells, the numbers of vascular bundles and the connection and strength of cells in stems.
Number of references: 14
Main heading: Tensile strength
Controlled terms: Biomechanics - Cellulose - Harvesting - Lignin - Microstructure - Plants (botany) - Scanning electron microscopy - Stem cells - Stress-strain curves - Tensile testing
Uncontrolled terms: Biomechanical properties - Cellulose content - Chemical compositions - Electronic testing - Forage stems - Harvesting periods - Hooke's Law - Polymeric composites - Protein contents - SEM image - Transverse section - Vascular bundle
Classification code: 815.1.1 Organic Polymers - 821.3 Agricultural Methods - 921 Mathematics - 811.3 Cellulose, Lignin and Derivatives - 931.1 Mechanics - 933 Solid State Physics - 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 801.4 Physical Chemistry - 422 Strength of Building Materials; Test Equipment and Methods - 422.2 Test Methods - 461.2 Biological Materials and Tissue Engineering - 421 Strength of Building Materials; Mechanical Properties - 461.3 Biomechanics, Bionics and Biomimetics - 531.2 Metallography - 741.1 Light/Optics - 461.9 Biology
DOI: 10.3969/j.issn.1000-1298.2010.04.018
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
32. Accession number: 20102212966620
Title: Corn skeleton reconstruction based on stereo vision
Authors: Zhao, Chunjiang1 ; Yang, Liang1 ; Guo, Xinyu1 ; Lu, Shenglian1 ; Xiao, Boxiang1
Author affiliation: 1 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author: Zhao, C. (zhaocj@nercita.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 157-162
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A method for extracting and reconstructing 3-D maize skeleton was presented based on stereo vision. Firstly, extracts the 2-D skeleton from two images taken from special angles, then uses epipolar constraint algorithm and appropriate matching criterions to match the feature points on the skeleton. The point cloud of the 3-D skeleton is then obtained. After de-noising operation, the final 3-D skeleton model of maize can be achieved by using B-spline curve fitting. Based on the skeleton model, some important agricultural geometric parameters, such as leaf length and the angle between stem and leaf, can be calculated easily. The experimental results show that the method can quickly reconstruct the 3-D skeleton of maize, with a deviation no more than 2%.
Number of references: 16
Main heading: Stereo vision
Controlled terms: Curve fitting - Splines - Three dimensional
Uncontrolled terms: 3D models - B spline curve - Corn - De-noising - Epipolar constraints - Feature point - Geometric parameter - Leaf length - Matching criterion - Point cloud - Skeleton extraction - Skeleton reconstruction
Classification code: 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 902.1 Engineering Graphics - 922.2 Mathematical Statistics - 741.2 Vision - 723.5 Computer Applications - 601.2 Machine Components - 731.6 Robot Applications
DOI: 10.3969/j.issn.1000-1298.2010.04.032
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
33. Accession number: 20102212966625
Title: Automatic navigation control system for tractor based on ISO 11783
Authors: Zhou, Jianjun1 ; Zheng, Wen'gang1 ; Li, Su2 ; Zhang, Man3 ; Ji, Chaofeng3 ; Meng, Zhijun1
Author affiliation: 1 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
2 College of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100037, China
3 Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author: Zheng, W. (zhengwg@nercita.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 184-188
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: According to the specifications of ISO 11783 standard, an automatic navigation control system was built. In the system, there were five ECUs, and the hardware and software design of steering control ECU were described in detail. At last the network service performance of the navigation control system was analyzed, and line path experiments were finished with the designed navigation control system. Experiments indicated that tractor navigation control system can satisfy the need of real time and could realize line path tracking. The lateral error is less than 11cm tractor tracking line path at a speed of 1m/s.
Number of references: 11
Main heading: Pneumatic control equipment
Controlled terms: Control theory - Design - Experiments - Navigation - Software design - Tractors (agricultural) - Tractors (truck)
Uncontrolled terms: Automatic navigation - Hardware and software - Navigation control systems - Network services - Path tracking - Real time - Steering control
Classification code: 902.1 Engineering Graphics - 723.1 Computer Programming - 723.5 Computer Applications - 731.1 Control Systems - 732.1 Control Equipment - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research - 716.3 Radio Systems and Equipment - 655.1 Spacecraft, General - 632.4 Pneumatic Equipment and Machinery - 434.4 Waterway Navigation - 431.5 Air Navigation and Traffic Control - 408 Structural Design - 663.1 Heavy Duty Motor Vehicles
DOI: 10.3969/j.issn.1000-1298.2010.04.037
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
34. Accession number: 20102212966624
Title: Determination of suitable leaf for nitrogen diagnosis in rice based on computer vision
Authors: Zhu, Jinxia1 ; Deng, Jinsong1 ; Lin, Fenfang1 ; Wang, Ke1
Author affiliation: 1 Institute of Agricultural Remote Sensing and Information Technology Application, Zhejiang University, Hangzhou 310029, China
Corresponding author: Wang, K. (kwang@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 179-183
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Prior research indicated that leaves at different positions responds differentially to the spectral characteristics under different nitrogen rates. A method based on the computer vision technology was proposed, by comparing the spatial differences of color parameters which was captured from the scanned images of upper fully expanded leaves. The result illustrated that the diagnosis of rice based on the scanned image under different N rates is able to partly reflect the hyperspectral properties. And the B, b, b/(r g), b/r, b/g were selected as the optimum color parameters. The coefficient of variation (CV) of the color parameters is higher at low N condition than normal. Furthermore, CV decreases with the increased leaf position. Meanwhile, the difference of CV at different part of the leaf is not obviously. The preliminary research concluded that the third fully expanded leaf can be applied as the ideal indicator to quantify the different status of nitrogen.
Number of references: 16
Main heading: Nitrogen
Controlled terms: Color - Computer vision
Uncontrolled terms: Coefficient of variation - Color parameter - Computer vision technology - Different part of the leaf - HyperSpectral - Leaf position - Nitrogen rate - Scanned images - Spatial differences - Spectral characteristics
Classification code: 723.5 Computer Applications - 731.6 Robot Applications - 741.1 Light/Optics - 741.2 Vision - 804 Chemical Products Generally
DOI: 10.3969/j.issn.1000-1298.2010.04.036
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
35. Accession number: 20102212966593
Title: Simulation of combustion and emissions in HCCI engine with charge-temperature stratification
Authors: Huang, Haozhong1, 2 ; Chen, Hui1 ; Pei, Yiqiang2 ; Yu, Hongdong1 ; Lu, Zhisi1 ; Zhao, Ruiqing1
Author affiliation: 1 School of Mechanical Engineering, Guangxi University, Nanning 530004, China
2 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author: Huang, H. (hhz421@tom.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 20-25 46
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A nine-zone model accounting for both mass exchange and heat loss was developed by modifying the SENKIN program. Combining with the SKLE simplified chemical kinetics model of n-heptane, the model was used to simulate the combustion and emissions of homogeneous charge compression ignition (HCCI) engine with charge-temperature stratification. The results showed that the simulation is able to reproduce the major combustion and emission characteristics of the experiments very well. In HCCI engine with charge-temperature stratification, the outer core zone, the boundary zone and the crevice zone are the source of CO and HC emissions. The CO and HC emissions in the outer core zone result from the partial-oxidation and unburned fuels which flow into the outer core zone from both the boundary zone and the crevice zone at the expand stroke. Most of NOx emissions are produced in the inner core zones with higher temperature compared to the other zones. High efficiency combustion and extra low emissions are achieved simultaneously by increasing the wall temperature properly in HCCI engine with charge-temperature stratification.
Number of references: 12
Main heading: Ignition
Controlled terms: Computational fluid dynamics - Computer simulation - Engines - Internal combustion engines
Uncontrolled terms: Boundary zones - Chemical kinetics model - Core zones - Emission characteristics - HC emissions - HCCI engine - High efficiency - Higher temperatures - Homogeneous charge compression ignition - Homogeneous charge compression ignition engines - Inner core - Low emission - Mass exchange - Multi-zone models - n-Heptanes - Numerical simulation - Temperature stratification - Unburned fuel - Wall temperatures - Zone model
Classification code: 921.6 Numerical Methods - 723.5 Computer Applications - 654.2 Rocket Engines - 631.1.2 Gas Dynamics - 931.1 Mechanics - 631.1.1 Liquid Dynamics - 612.1 Internal Combustion Engines, General - 612 Engines - 521.1 Fuel Combustion - 617.3 Steam Engines
DOI: 10.3969/j.issn.1000-1298.2010.04.005
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
36. Accession number: 20102212966622
Title: Recognition method of maize cultivars based on K-L transform and LS-SVM
Authors: Quan, Longzhe1, 2 ; Zhu, Rongxin3 ; Lei, Pu1 ; Han, Bao1, 2
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
2 Key Laboratory for Terrain-Machine Bionics Engineering, Jilin University, Changchun 130025, China
3 College of Mechanical Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China
Corresponding author: Han, B. (hanbao2004@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 168-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A method for maize cultivars identification was proposed, by using the combination algorithm of K-L transform and least square support vector machines (LS-SVM). Firstly, labeling algorithm and multi-scale wavelet analysis were used to acquire single corn kernel images; secondly, K-L transform was employed to extract the features of corn kernel images; at last, the method of LS-SVM with a binary tree architecture was developed to identify maize cultivars by using feature data. According to the result of test, the reasonable state space dimension (L=3) is acquired, and this method gives a correct recognition rate of 95.3%.
Number of references: 13
Main heading: Support vector machines
Controlled terms: Binary trees - Feature extraction - Image processing - Imaging systems - Trees (mathematics) - Wavelet analysis
Uncontrolled terms: Binary tree architecture - Corn kernels - Feature data - Image process - K L transform - Labeling algorithms - Least square support vector machines - LS-SVM - Maize cultivars - Multi-scale wavelet analysis - Recognition methods - Recognition rates - State space
Classification code: 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 751.1 Acoustic Waves - 746 Imaging Techniques - 741.1 Light/Optics - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 703.2.1 Electric Filter Analysis
DOI: 10.3969/j.issn.1000-1298.2010.04.034
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
37. Accession number: 20102212966633
Title: Wearing fault diagnosis of reciprocating membrane pump based on chaos and fractal theory
Authors: Shi, Lichen1 ; Duan, Zhishan1
Author affiliation: 1 School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Corresponding author: Duan, Z. (duanzhishan1950@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 222-226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The non-linear behaviour for wearing fault of reciprocating membrane pump was investigated with chaos theory and fractal technology. The vibration acceleration signals of the wearing in different joint were collected to analyse. Poincare sections were drew to study the status of the system. Correlation dimension and the largest Lyapunov exponent were calculated to recognize the different wearing. The results showed that non-abrasion pump system is in quasi-period state, while the fault status is in chaos. The research also indicated that different wearing fault has different largest Lyapunov exponent and different correlation dimension, which can be used as the characteristics for the pump's monitoring and fault diagnosis.
Number of references: 9
Main heading: Chaos theory
Controlled terms: Computer crime - Differential equations - Failure analysis - Fractals - Lyapunov methods - Pumps - Vibration analysis
Uncontrolled terms: Based-on chaos - Chaos - Correlation dimensions - Fault diagnosis - Fractal technology - Largest Lyapunov exponent - Nonlinear behaviours - Poincare sections - Pump system - Vibration acceleration
Classification code: 943.2 Mechanical Variables Measurements - 931.1 Mechanics - 922 Statistical Methods - 921.2 Calculus - 921 Mathematics - 961 Systems Science - 902.3 Legal Aspects - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 618.2 Pumps - 421 Strength of Building Materials; Mechanical Properties - 751.2 Acoustic Properties of Materials
DOI: 10.3969/j.issn.1000-1298.2010.04.045
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
38. Accession number: 20102212966631
Title: Analysis of roll bending configuration and technology of roll bending three dimensional surface
Authors: Hu, Zhiqing1, 2 ; Li, Mingzhe2 ; Liu, Jiaan3
Author affiliation: 1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
2 Roll Forging Research Institute, Jilin University, Changchun 130025, China
3 School of Material Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: Hu, Z. (zqhu@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 213-216
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Continuous multipoint forming method(CMFM) was introduced simply. The key rollers of continuous multipoint forming device(CMFD) were studied in different disposals and different drives. The drive of three rollers at two sides was felicitous realized, and the CMFD was developed. The process of roll bending was discussed. The results showed that one-step forming is adopt on mini deformation, but when the press displacement of top roller exceeds stated value, the procedure can't be continued, the multi-step forming is advantaged of inducing sheet metal deformed, eliminates the sides winkle, and reduces the spring back with each mini deformation.
Number of references: 7
Main heading: Sheet metal
Controlled terms: Deformation - Drives - Rollers (machine components) - Three dimensional
Uncontrolled terms: Multi-point forming - Multi-step - Press displacement - Roll bending - Spring back - Three-dimensional surface
Classification code: 723.5 Computer Applications - 705 Electric Generators and Motors - 632.4 Pneumatic Equipment and Machinery - 632.2 Hydraulic Equipment and Machinery - 902.1 Engineering Graphics - 602.1 Mechanical Drives - 535.1 Metal Rolling - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 601.2 Machine Components
DOI: 10.3969/j.issn.1000-1298.2010.04.043
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
39. Accession number: 20102212966632
Title: Application of morphological wavelet de-noising in extracting gear fault feature
Authors: Shen, Lu1 ; Zhou, Xiaojun1 ; Liu, Li2 ; Yang, Fuchun1
Author affiliation: 1 The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
2 DADI Engineering Machinery Co., Ltd, Inner Mongolia First Machinery Group Corporation, Baotou 014032, China
Corresponding author: Yang, F. (yfc26@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 217-221
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Fault feature is always hidden by strong noise background in gear fault signal. Based on morphological wavelet de-noising, a novel method was proposed to extract gear fault feature. Morphological wavelet de-noising has a good performance in extracting morphological feature in signal. Firstly, the signal was decomposed by morphological wavelet. Secondly, detail coefficient in each level was processed using soft threshold de-noising. Finally, fault feature was extracted by reconstructing original signal. Simulation and experiment results showed that this method is effective in gear feature extraction. Morphological wavelet de-noising algorithm includes addition, subtraction, maximum and minimum operations, and does not involve multiplication and division. It is suitable for on-line monitor and gear fault diagnosis.
Number of references: 14
Main heading: Feature extraction
Controlled terms: Failure analysis - Signal processing
Uncontrolled terms: De-noising - Detail coefficients - Fault diagnosis - Fault feature - Gear fault diagnosis - Gear faults - Morphological features - Morphological wavelet - Novel methods - On-line monitors - Original signal - Soft threshold
Classification code: 921 Mathematics - 751.1 Acoustic Waves - 741.1 Light/Optics - 723.5 Computer Applications - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.04.044
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
40. Accession number: 20102212966601
Title: Experiment on retention of spray liquid on cucumber leaves
Authors: Lu, Jun1 ; Jia, Weidong1 ; Qiu, Baijing1 ; Li, Pingping1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Li, P. (lipingping@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 60-64
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: With the aim to study the point of run-off and the maximum retention of spray liquid on cucumber leaves in greenhouse, the spraying experiment was performed with various charged voltage and spray volume. Taking the barbette model pressure atomization axial-flow air-carried high-voltage electrostatic spraying system as the experiment platform, the retention volume on cucumber leaves surface was measured by micro-weighing method. The factors on the retention volume were analyzed based on basic theory of Young's equation, including spray distance, droplet contact angle and spray volume. The results show that with the increasing distance, point of run-off and maximum retention rises firstly and then declines; the contact angle θ, adhesion force β, adhesion work Wa, critical surface tension γ0is 85.07°, 6.17mN/m, 77.97mJ/m2, 61.23mN/m, respectively; the retention volume reaches the peak in spray volume range from 1.26kL/hm2 to 3.36kL/hm2, and then reduces and gradually stabilizes with the increasing spray volume.
Number of references: 15
Main heading: Experiments
Controlled terms: Adhesion - Contact angle - Electrostatics - Liquids - Surface tension
Uncontrolled terms: Adhesion forces - Basic theory - Charged voltage - Critical surface tension - Electrostatic spray - Electrostatic spraying - High-voltages - Pressure atomization - Retention points - Spray distances - Spray liquids - Spray volume - Weighing method - Young's equation
Classification code: 631.1.1 Liquid Dynamics - 701.1 Electricity: Basic Concepts and Phenomena - 801 Chemistry - 901.3 Engineering Research - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.04.013
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
41. Accession number: 20102212966618
Title: Green-protecting process optimization in processing of eucommia male flower tea by response surface analysis method
Authors: Fu, Zhuorui1 ; Dong, Juane2 ; Ma, Xihan3
Author affiliation: 1 College of Forestry, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Life Sciences, Northwest A and F University, Yangling, Shaanxi 712100, China
3 College of Science, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Dong, J. (dzsys@nwsuaf.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 145-150
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Aimed at the discoloration problems in processing of eucommia male flower tea, color protection treatments such as salt ions, citric acid, ascorbic acid, and deactivation of enzymes were used to inhibit the browning. The influencing factors on the liquor color of the male flower tea were evaluated based on the single factor experiment by using SAS software. The concentrations of Zn2 and citric acid for flower preparation and the duration for flower steaming were selected as the main effect factors. The mathematical model of green-protecting techniques in processing of male flower tea was established with the central-composite model of response surface methodology in Design-Expert software. The optimal technique of green-protecting during the male flower tea processing were: to spray 0.04% Zn2 and 0.4% citric acid aqueous solution on the male flowers with the solid-liquid ratio of 10g/mL, and then steam the male flower for about 40 second. With the above treatment, the browning and quality decreasing of the male flower tea can be avoided.
Number of references: 15
Main heading: Surface properties
Controlled terms: Citric acid - Computer software - Ketones - Mathematical models - Optimization - Organic acids - Surface analysis - Zinc
Uncontrolled terms: Aqueous solutions - Ascorbic acids - Composite models - Design-expert - Eucommia ulmoides - Influencing factor - Main effect - Process optimization - Process response - Response surface analysis methods - Response Surface Methodology - Salt ions - Solid-liquid ratio
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 921 Mathematics - 822 Food Technology - 804.1 Organic Compounds - 723 Computer Software, Data Handling and Applications - 546.3 Zinc and Alloys - 423 Non Mechanical Properties and Tests of Building Materials
DOI: 10.3969/j.issn.1000-1298.2010.04.030
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
42. Accession number: 20102212966597
Title: Design and experiment on oriented system for no-tillage planters in maize stubble field
Authors: Li, Hongwen1 ; Li, Jiao1 ; Su, Yanbo1 ; Zhang, Xirui1 ; Wang, Qingjie1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, H. (lhwen@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 41-46
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An oriented system for no-tillage planters, which consists of guiding frame, hydraulic system and control unit was designed according to the problem of no-tillage planting quality resulted from the unefficient maize row-following capacity of no-tillage planter in annual double cropping areas. The main parameters of guiding frame determine on the matched tractor. Furthermore, the force analyses in different positions of the outside frame of guiding frame indicates that the guiding system can meet the requirements of the maximum load for adjusting planter direction in the planting. By employing JDT654L tractor as a test platform, the system performance analysis was conducted, and the results showed that the adjusting range of actuator is -10.8°-10.7°. Moreover, the outcomes also indicated that the system is capable of commutating steadily and rapidly, and performs a fair response capability and satisfactory control accuracy to input signals, with maximum error angle of no more than 1.5°, which assures that the implements direction could be timely corrected.
Number of references: 16
Main heading: Agriculture
Controlled terms: Agricultural machinery - Automobile testing - Design - Experiments - Hydraulic equipment - Tractors (truck)
Uncontrolled terms: Control unit - Double cropping - Force analysis - Guiding systems - Hydraulic system - Input signal - Main parameters - Maize stubble field - Maximum error - Maximum load - No tillage - No-tillage planter - Response capability - Satisfactory control - System performance analysis - Test platforms
Classification code: 902.1 Engineering Graphics - 901.3 Engineering Research - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 663.1 Heavy Duty Motor Vehicles - 663 Buses, Tractors and Trucks - 662 Automobiles and Smaller Vehicles - 632.2 Hydraulic Equipment and Machinery - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.04.009
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
43. Accession number: 20102212966590
Title: Simulation and test on starting condition of light-hybrid diesel engine
Authors: Wei, Changhe1 ; Wang, Zhong1 ; Wang, Yucheng1 ; Huang, Chenghai2 ; Tang, Ting2
Author affiliation: 1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2 Wuxi Diesel Engine Works, FAW Jiefang Automotive Company, Ltd, Wuxi 214026, China
Corresponding author: Wang, Z. (wangzhong@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 6-11
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Aimed at the starting condition of light hybrid diesel engine with ISG technology in normal temperature, the working models of diesel engine and ISG electromotor were established. Then, the diesel engine moment of resistance on the starting condition was calculated to obtain the torque and the power from the ISG electrical machinery. And, the simulation to the starting process was carried out. Finally, the test of the ISG electromotor dragging diesel engine under the different voltage was performed to confirm the simulation result. The results showed that with the ISG technology, the diesel engine can be dragged to meet the requirement speed on the battery voltage of 36-60V. The average starting torque of ISG motor is 87.4N·m, the line current of each start winding is 30-150A. and the output power of ISG fall after the first increase with the peak power of 4.98kW. The simulated starting time from 0 to fire is 0.4s, compared with the test result of 0.5s; while time from 0 to stable idling in the simulation is only 2.8s, the test result is 3.1s. So, the test result is tallied with the simulation.
Number of references: 12
Main heading: Diesel engines
Controlled terms: Electric machinery - Engines - Testing
Uncontrolled terms: Battery voltages - Hybrid simulation - Line currents - Output power - Peak power - Simulation - Simulation result - Starting process - Starting torque - Test results - Working models
Classification code: 705.1 Electric Machinery, General - 654.2 Rocket Engines - 617.3 Steam Engines - 612.2 Diesel Engines - 612 Engines - 423.2 Test Methods - 422.2 Test Methods
DOI: 10.3969/j.issn.1000-1298.2010.04.002
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
44. Accession number: 20102212966616
Title: Optimization of extraction technology and antioxidant activities of total phenol from betel nut seed
Authors: Han, Lin1 ; Zhang, Haide1 ; Li, Guosheng1 ; Lu, Shenghui1 ; Sheng, Lingzhi1
Author affiliation: 1 College of Food Science, Hainan University, Haikou 570228, China
Corresponding author: Zhang, H. (zhanghaide@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 134-139
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Optimization of the extraction technology for total phenol from betel nut seed was carried out. On the basis of one factor tests, the method of response surface analysis with 3 factors including extracting temperature, time and solvent-material ratio on the content of total phenol was adopted. The optimal extracting conditions are as follows: extraction temperature 58°C; extraction time 4h; solvent-material ratio 47mL/g. The predicted value and measured value of total phenol is 148.09mg/g and 146.63mg/g, respectively. The results indicate that the obtained mode developed by response surface methodology is feasible for practical prediction. The experiments of antioxidant activity show that the betel nut seed extract presents the strong antioxidant activities to the DPPH and ABTS radical, and the EC50 is 145.62μg/mL and 139.38μg/mL, respectively.
Number of references: 15
Main heading: Surfaces
Controlled terms: Optimization - Phenols - Plants (botany) - Seed - Surface analysis - Surface properties
Uncontrolled terms: Antioxidant activities - Antioxidant activity - Betel nut seed - Response Surface Methodology - Total phenols
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931 Classical Physics; Quantum Theory; Relativity - 921.5 Optimization Techniques - 821.4 Agricultural Products - 951 Materials Science - 804.1 Organic Compounds - 604.2 Machining Operations - 461.9 Biology - 423 Non Mechanical Properties and Tests of Building Materials - 801.4 Physical Chemistry
DOI: 10.3969/j.issn.1000-1298.2010.04.028
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
45. Accession number: 20102212966595
Title: Effect of turbocharged condition on combustion noise of diesel engine
Authors: Li, Zhaowen1 ; Shu, Gequn1 ; Wei, Haiqiao1 ; Liang, Xingyu1 ; Zhang, Zuo1
Author affiliation: 1 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author: Wei, H. (whq@tju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 4
Issue date: April 2010
Publication year: 2010
Pages: 31-35
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: This paper studied the influencing mechanism on combustion noise in DT-diesel engines for turbocharged conditions. By measuring parameters of influencing combustion noise between natural aspirated and turbocharged diesel engine in constant torque and increasing speed transient and steady conditions, the change law of combustion noise in diesel engines was clarified. The testing result was thoroughly analyzed from the point of the combustion chamber's wall temperature, aerodynamic load and high-frequency oscillation of combustion pressure. The result showed that the combustion noise of DI-diesel with turbocharger is reduced, and the reduction under turbocharged condition in steady condition is more obvious than that in constant torque and increasing speed transient condition, the effect of turbocharged condition on combustion noise is better in intermediate speed and middle load.
Number of references: 8
Main heading: Diesel engines
Controlled terms: Aerodynamics - Combustion - Combustion chambers - Engines - Experiments - Load testing
Uncontrolled terms: Combustion noise - Combustion pressure - Constant torque - DI-diesel engine - High frequency oscillations - Measuring parameters - Steady conditions - Testing results - Transient conditions - Turbocharged diesel engine - Wall temperatures
Classification code: 901.3 Engineering Research - 654.2 Rocket Engines - 651.1 Aerodynamics, General - 617.3 Steam Engines - 612.2 Diesel Engines - 612 Engines - 521.1 Fuel Combustion - 483.1 Soils and Soil Mechanics - 422.2 Test Methods
DOI: 10.3969/j.issn.1000-1298.2010.04.007
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
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