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2011年第42卷第10期共收录44篇
1. Accession number:20114614514887
  Title:Middle-high frequency vibration transfer analysis of vehicle suspension and optimization of rubber bushings
  Authors:Chen, Wuwei1 ; Li, Xinran1 ; Chen, Xiaoxin1 ; Wang, Lei1 
  Author affiliation:1  School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
  Corresponding author:Chen, W. (cww@mail.hf.ah.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:25-29
  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 ADAMS and NASTRAN, a rigid-flexible coupling dynamic full vehicle model was established. A virtual test rig was also built up by using ADAMS/Vibration to analyze the vibration responses and transfer characteristics of the suspension system motivated by middle-high frequency road excitations. To improve the vibration isolation capability of the suspension system, the effects of the subframe, twist beam and rubber bushings of the chassis/suspension system with the vehicle vibration was analyzed. Finally, through adopting the ADAMS/Insight DOE technology, the researchers proposed the sensitivity analyses of several key rubber bushing stiffness, and the optimization of the bushing in the environment of ADAMS/Insight. By changing the bushing stiffness, the vibration performance of the vehicle was improved. Simulation results indicated that the vertical acceleration root mean square (RMS) decreased from 477.9 mm/s2 to 454.2 mm/s2, by 5% in the whole research frequency spectrum.
  Number of references:9
  Main heading:Vibration analysis
  Controlled terms:Automobile suspensions  -  Bushings  -  Flexible couplings  -  Optimization  -  Rubber  -  Sensitivity analysis  -  Spectroscopy  -  Stiffness  -  Suspensions (components)  -  Vehicles
  Uncontrolled terms:Frequency excitation  -  Frequency spectra  -  Frequency vibration  -  Full vehicle model  -  NASTRAN  -  Rigid flexible coupling  -  Road excitations  -  Root Mean Square  -  Rubber bushing  -  Rubber bushings   -  Simulation result  -  Sub-frame  -  Suspension system  -  Transfer characteristics  -  Vehicle vibrations  -  Vertical accelerations  -  Vibration isolations  -  Vibration response  -  Vibration transfer characteristics  -  Virtual test rig
  Classification code:951 Materials Science  -  943.2 Mechanical Variables Measurements  -  921.5 Optimization Techniques  -  921 Mathematics  -  818.1 Natural Rubber  -  801 Chemistry  -  704.1 Electric Components  -  632.1 Hydraulics  -  602.2 Mechanical Transmissions  -  601.2 Machine Components  -  432 Highway Transportation  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties
  Database:Compendex
 
2. Accession number:20114614514908
  Title:Mass and heat transfer analysis of vacuum infrared radiation drying on rehmanniae
  Authors:Liu, Yunhong1 ; Zhu, Wenxue1 ; Liu, Jianxue1 
  Author affiliation:1  College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China
  Corresponding author:Liu, Y. (beckybin@mail.haust.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:135-140
  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:Mathematical model of mass and heat transfer about vacuum infrared radiation drying on Rehmanniae was built based on Fourier equation and Fick equation. The values or equation of model parameters were determined by theoretical analysis and experiments. By using finite difference method, mathematical simulations of sample temperature and moisture content under different drying conditions were carried out. The results showed that values of simulation and experiment fit well, the model could well simulate the changes of sample temperature and moisture content during drying and the influence of drying parameters on drying characteristics were illustrated by the model satisfactorily.
  Number of references:16
  Main heading:Infrared drying
  Controlled terms:Computer simulation  -  Experiments  -  Heat transfer  -  Infrared radiation  -  Mathematical models  -  Moisture  -  Moisture determination  -  Radiometers  -  Vacuum
  Uncontrolled terms:Drying characteristics  -  Drying condition  -  Drying parameters  -  Fourier equations  -  Heat transfer analysis  -  Mathematical simulations  -  Model parameters  -  Rehmanniae  -  Sample temperature
  Classification code:944.2 Moisture Measurements  -  921 Mathematics  -  901.3 Engineering Research  -  801.4 Physical Chemistry  -  944.7 Radiation Measuring Instruments  -  741.1 Light/Optics  -  642.1 Process Heating  -  641.2 Heat Transfer  -  633 Vacuum Technology  -  723.5 Computer Applications
  Database:Compendex
 
3. Accession number:20114614514909
  Title:Pulsed air-impingement dryer
  Authors:Wang, Lihong1, 2 ; Gao, Zhenjiang1 ; Lin, Hai2 ; Xiao, Hongwei1 ; Zhang, Qian2 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
  Corresponding author:Gao, Z. (zjgao@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:141-144
  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:A pulsed air-impingement dryer was designed with large processing capacity, convenient to replace the size and shape of the nozzle exit compared to conventional air-impingement dryer. The machine could adjust air temperature, wind speed, rotary speed of materiel shelf, nozzle diameter and structure according to different materials properties. Material was received the pulsed impact of high-speed hot air, which contributed to outward migration of moisture within the material. Tomato was adopted to test the performance of pulsed air-impingement dryer. The results showed that the dehydration intensity and processing capacity of pulsed air-impingement dryer was improved than the conventional air-impingement dryer.
  Number of references:11
  Main heading:Driers (materials)
  Controlled terms:Dryers (equipment)  -  Materials properties  -  Nozzles
  Uncontrolled terms:Air-impingement  -  Dryer  -  Performance experiment  -  Pulse  -  Structure design
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  423 Non Mechanical Properties and Tests of Building Materials  -  631.1 Fluid Flow, General  -  802.1 Chemical Plants and Equipment  -  803 Chemical Agents and Basic Industrial Chemicals
  Database:Compendex
 
4. Accession number:20114614514910
  Title:Effect of fluids property on liquid flow regimes in wiped film molecular distillation
  Authors:Xu, Songlin1 ; Wang, Xiaoming1 
  Author affiliation:1  School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  Corresponding author:Xu, S. (slxu@tju.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:145-149
  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 high-speed camera was used to investigate the flow pattern of liquid film. Four regimes were identified as: droplet flow, strand flow, discontinuous film flow and continuous film flow when liquid flow rate increased gradually. Moreover, the critical flow rate of water, ethanol, ethylene glycol and glycerin solution under different rotate speeds were tested. Then the Gaussian process was adopted to predict more data. Results indicated that the critical flow rate increased with the growth of surface tension and decreased as the viscosity increased at certain rotate rate.
  Number of references:14
  Main heading:Distillation
  Controlled terms:Ethanol  -  Ethylene  -  Ethylene glycol  -  Flow patterns  -  Flow rate  -  Gaussian distribution  -  Gaussian noise (electronic)  -  Glycerol  -  Liquid films  -  Surface tension
  Uncontrolled terms:Continuous films  -  Critical flow rate  -  Critical rates  -  Discontinuous films  -  Droplet flow  -  Flow regimes  -  Gaussian Processes  -  Liquid flow  -  Liquid flow rates  -  Molecular distillation   -  Rotate speed  -  Wiped film molecular distillation
  Classification code:922.1 Probability Theory  -  804.1 Organic Compounds  -  802.3 Chemical Operations  -  931.2 Physical Properties of Gases, Liquids and Solids  -  716 Telecommunication; Radar, Radio and Television  -  631.1 Fluid Flow, General  -  631 Fluid Flow  -  713 Electronic Circuits
  Database:Compendex
 
5. Accession number:20114614514889
  Title:Analysis and design on torque characteristic of magnetic particle clutch
  Authors:Wang, Cheng1, 2 ; Chang, Siqin1 
  Author affiliation:1  School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
                 2  Faculty of Transportation Engineering, Huaiyin Institute of Technology, Huaian 223003, China
  Corresponding author:Chang, S. (changsq@mail.njust.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:35-38 34
  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 increase the torque capacity, the torque-transferring formula was deduced from electromagnetic force theory of virtual displacement according to working mechanism of magnetic particle clutch. The FEM model was established based on theory of Maxwell equation for analysis magnetic field and its simulation results conformed to the test results. According to the simulation results, improved design was made on magnetic particle clutch. The results showed that the improved magnetic particle clutch had a remarkable effect on the torque performance, and its torque performance increased by 45%.
  Number of references:8
  Main heading:Magnetic bubbles
  Controlled terms:Clutches  -  Computer simulation  -  Electromagnetism  -  Magnetic fields  -  Maxwell equations  -  Torque
  Uncontrolled terms:Analysis and design  -  Electromagnetic forces  -  FEM models  -  Magnetic particle clutch  -  Simulation  -  Simulation result  -  Test results  -  Torque capacity  -  Torque characteristic  -  Virtual displacements   -  Working mechanisms
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  602.2 Mechanical Transmissions  -  701 Electricity and Magnetism  -  701.2 Magnetism: Basic Concepts and Phenomena  -  723.5 Computer Applications
  Database:Compendex
 
6. Accession number:20114614514900
  Title:Effect of area ratio on mixing homogeneity in jet-mixing apparatus
  Authors:Qiu, Baijing1 ; Xu, Xichao1 ; Deng, Bin1 ; Yang, Ning1 ; Jiang, Guowei1 ; Wu, Chundu1 
  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, 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:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  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:Aimed at homogeneity principle of water mix with pesticide in the jet-mixing apparatus, a mathematical model for solving the interior concentration field was established, CFD software called Fluent was used to calculate the field. Time-average mass fraction of pesticide was obtained. Intensity of segregation was introduced to quantitative evaluate the mix degree of water and pesticide. The water was mixed with pesticide uniformly when intensity of segregation was 0.05. As the increasing of area ratio, the shortest mixing distance decreased with the area ratio m∈[2.56, 4.00]. The mixing performance of jet-apparatus with m=3.06 was better than the jet-mixing apparatus with m=2.56 and m=4.00. The diffusive mixing zone appeared after the maximum turbulent intensity average rate decreased by 14.96%. And the coordinate interval was X∈[(-13.85m 111.37) mm, 116.5 mm]. Therefor, when measure the concentration in jet-mixing apparatus by experiment, it should according the coordinate interval and area ratio to choose the appreciate concentration measurement point.
  Number of references:14
  Main heading:Mixing
  Controlled terms:Computational fluid dynamics  -  Equipment  -  Mathematical models  -  Pesticide effects
  Uncontrolled terms:Area ratios  -  Average rate  -  CFD softwares  -  Computational fluid  -  Concentration fields  -  Concentration Measurement  -  Diffusive mixing  -  Intensity of segregation  -  Mass fraction  -  Mixing performance   -  Turbulent intensities
  Classification code:802.3 Chemical Operations  -  803 Chemical Agents and Basic Industrial Chemicals  -  901 Engineering Profession  -  921 Mathematics  -  921.6 Numerical Methods
  Database:Compendex

7. Accession number:20114614514892
  Title:Powered hammering blade no-till wheat seeder for permanent raised beds
  Authors:He, Jin1 ; Li, Hongwen1 ; Wang, Qingjie1 ; Zhang, Xirui2 ; Li, Hui1 ; Zhang, Dongyuan1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  Institute of Electrical and Mechanical Engineering, Hainan University, Danzhou 571737, 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:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:51-55 67
  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 problems of few available no-till seeders and residues-blocking and bed-damaging during the seeding of wheat in maize residues cover fields in permanent raised beds (PRB) in northwest oasis farming areas, the new anti-blocking (residue-chopping and throwing by powered L-type hammering blade and residue-cutting by knife type opener) and bed renovation (bed-reshaping by double-wing plough) ideas were put forward. The powered hammering blade no-till wheat seeder for PRB was designed. The key parameters for L-type hammering blade, opener and double-wing plough were determined. The experiment in maize residue cover fields showed that the seeder was effective in solving residues blocking. Compared with 2BMF-5 no-till wheat seeder, the spring wheat yield was similar and bed renovation effect was better with the decreased soil disturbance.
  Number of references:11
  Main heading:Agricultural machinery
  Uncontrolled terms:Hammering blade  -  Key parameters  -  No-till  -  No-till seeder  -  No-till wheat seeder  -  Permanent raised beds  -  Raised beds  -  Residue cover  -  Soil disturbances  -  Spring wheat   -  Wheat
  Classification code:821.1 Agricultural Machinery and Equipment
  Database:Compendex

8. Accession number:20114614514924
  Title:Modified contact model of joint interfaces based on fractal theory
  Authors:Lan, Guosheng1 ; Zhang, Xueliang1 ; Ding, Hongqin1 ; Wen, Shuhua1 ; Zhang, Zongyang1 ; Lu, Qingbo1, 2 
  Author affiliation:1  College of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
                 2  Department of Electrical and Electronic Engineering, Zhengzhou Technical College, Zhengzhou 450121, China
  Corresponding author:Zhang, X. (zhang_xue_l@sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:217-223 229
  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 modified contact model of joint interfaces based on fractal theory was proposed. Furthermore, numerical simulation was carried out to obtain the complicated nonlinear relations between normal contact stiffness and the normal contact load, the fractal dimension D and the fractal characteristic length scale parameter G. The results showed that the normal contact stiffness increased with the normal load, decreased with G but complicatedly with D. The results showed that the contact model could be used to calculate the normal contact stiffness and the normal load.
  Number of references:15
  Main heading:Fractal dimension
  Controlled terms:Computer simulation  -  End effectors  -  Stiffness
  Uncontrolled terms:Contact load  -  Contact models  -  Contact stiffness  -  Fractal characteristics  -  Fractal theory  -  Joint interfaces  -  Nonlinear relations  -  Normal contact load  -  Normal contact stiffness  -  Normal loads
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  723.5 Computer Applications  -  731.5 Robotics  -  921 Mathematics  -  951 Materials Science
  Database:Compendex

9. Accession number:20114614514893
  Title:Parametric analysis of finger-type anti-blocking residue-cleaner for no-till planting
  Authors:Fan, Xuhui1, 2 ; Jia, Honglei1 ; Zhang, Weihan1 ; Yang, Haitian2 ; Gu, Yaoquan2 ; Li, Honggang2 
  Author affiliation:1  Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
                 2  Jilin Province Academy of Agricultural Machinery, Changchun 130022, China
  Corresponding author:Jia, H. (jiahl@vip.163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:56-60
  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:Work principle of a new anti-blocking mechanism for no-till planting was described. Equations about the trajectory, the absolute velocity and the acceleration of any vertex on the finger wheel were deduced. Associated graphics were constructed by software, and parameters of the device were analyzed. The results indicated that the movement angles δ was chosen between 20°-40° and had great influence on working width compared with radius of the finger wheel. Backward inclined distribution should be adopted for the finger.
  Number of references:13
  Main heading:Wheels
  Uncontrolled terms:Finger-type  -  No-till  -  No-till planting  -  Parametric analysis  -  Profile modeling  -  Residue-cleaner  -  Work principle
  Classification code:601.2 Machine Components
  Database:Compendex
 
10. Accession number:20114614514925
  Title:Distortion calibration of parallel screw thread form based on non-contact measurement
  Authors:Shen, Menghong1 ; Shen, Shaofeng1 ; Wang, Xiancheng2 ; Chen, Junhua2 ; Zeng, Chengzhou2 
  Author affiliation:1  Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
                 2  Institute of Mechanical and Electrical Engineering, Ningbo Institute of Technology of Zhejiang University, Ningbo 315100, China
  Corresponding author:Shen, M. (hot@zju.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:224-229
  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:Thread form showed distortion when measuring parallel screw thread parameters by using non-contact method. The traditional way had some defects, such as time consuming, skilled operator, high-precision equipment for adjustment and so on. Hence, a method through digital image calibration was presented. Based on the thread geometrical principle, the mathematical model was given out. With the above thread mathematic model, images obtained from camera were corrected and real thread form could be got. With the results of related experiments and simulation, the mathematic model was certified. This proposed method could improve accuracy and efficiency of thread measurement and detection.
  Number of references:17
  Main heading:Screw threads
  Controlled terms:Calibration  -  Computer simulation  -  Mathematical models  -  Mathematical operators
  Uncontrolled terms:Digital image  -  Distortion calibration  -  High-precision  -  Mathematic model  -  Noncontact measurements  -  Noncontact methods  -  Parallel screw threads  -  Thread measurement
  Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  921 Mathematics  -  723.5 Computer Applications  -  601.2 Machine Components
  Database:Compendex

11. Accession number:20114614514911
  Title:Determination of heat transfer coefficients of postharvest fruit
  Authors:Zhang, Min1 ; Lu, Jiahua1 ; Yang, Le1 ; Chen, Jianhua1 ; Che, Zhenhua1 ; Xie, Jing1 
  Author affiliation:1  College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
  Corresponding author:Zhang, M. (zhangm@shou.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:150-153 149
  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 test was applied to determine the heat transfer coefficients of apple and cucumber to obtain the experimental correlation of heat transfer. The results showed that the heat transfer coefficients of fruit increased with the increasing of air velocity, decreased with the increasing of radial dimension of fruit under the same condition of the hot air temperature. The heat exchange efficiency between fruits and hot air was enhanced significantly for the biological transpiration. Phase transition occurred in the process of heat transfer.
  Number of references:12
  Main heading:Fruits
  Controlled terms:Heat transfer coefficients
  Uncontrolled terms:Air velocities  -  Experimental correlation  -  Heat exchange efficiency  -  Hot air  -  Hot air temperature  -  Hot air treatment  -  Postharvest
  Classification code:641.2 Heat Transfer  -  821.4 Agricultural Products
  Database:Compendex

12. Accession number:20114614514901
  Title:Structure optimization and performance research of guided baffle shield sprayer
  Authors:Zhang, Jing1 ; He, Xiongkui1 ; Song, Jianli1 ; Zeng, Aijun1 ; Liu, Yajia1 ; Herbst, A.2 
  Author affiliation:1  College of Science, China Agricultural University, Beijing 100193, China
                 2 Federal Biological Research Centre for Agriculture and Forestry, Braunschweig 38104, Germany
  Corresponding author:He, X. (xiongkui@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  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:Guided baffle shield application is effective and economical method to reduce droplets drift. The performance research of this system was carried out with wind tunnel experiment and field trials of herbicide. The results showed that the optimum structure parameters of the guided baffle shield sprayer were: shield width of 40 cm, shield angle of 50°, nozzle angle of 50°. 30 days after herbicide application, the weeds control effects was 81.4%, fresh weight effects was 76.4% which were superior to conventional application; when the herbicide dosage reduced by 20%, the effect with shield application was same to conventional application. So the guided shield application could save pesticide and reduce cost.
  Number of references:11
  Main heading:Structural optimization
  Controlled terms:Herbicides  -  Research  -  Weed control
  Uncontrolled terms:Baffle  -  Economical methods  -  Field trial  -  Fresh weight  -  Herbicide application  -  Nozzle angle  -  Parameter optimizing  -  Performance research  -  Sprayer  -  Structure optimization   -  Structure parameter  -  Wind tunnel experiment
  Classification code:803 Chemical Agents and Basic Industrial Chemicals  -  901.3 Engineering Research  -  921.5 Optimization Techniques
  Database:Compendex

13. Accession number:20114614514926
  Title:Deep drawability of high strength steel sheet under different blank holder force conditions
  Authors:Liu, Ruijun1 ; Chu, Yaxu1 ; Yan, Kangkang2 
  Author affiliation:1  College of Transportation and Civil Engineering, Beihua University, Jilin 132013, China
                 2  R and D Center, China FAW Group Corporation, Changchun 130011, China
  Corresponding author:Chu, Y. (cyx_1964@sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:230-234
  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 benchmark cylindrical cup deep drawing scheme, a cylinder deep drawing scheme was designed to study deep drawability of the high strength steel (HSS) sheet. HSS sheet SPCN440W-NS (1.2 mm) was drawn respectively under 70 kN and 10 kN blank holder force (BHF) conditions, and drawing process was simulated by DYNAFORM software. The test and simulation results showed that HSS sheet SPCN440W-NS had better deep drawability. BHF had great influence on deep drawability of the HSS sheet. Workpiece had better surface quality under 70 kN BHF condition, and was easily wrinkled in its flange region under 10 kN BHF condition. The simulation accuracy of the DYNAFORM software under 70 kN BHF condition was higher than 10 kN BHF condition.
  Number of references:10
  Main heading:Deep drawing
  Controlled terms:Computer software  -  High strength steel  -  Steel sheet
  Uncontrolled terms:Blank holder forces  -  Deep-draw  -  High strength  -  Metal flow  -  Wrinkle
  Classification code:535.2 Metal Forming  -  545.3 Steel  -  723 Computer Software, Data Handling and Applications
  Database:Compendex

14. Accession number:20114614514923
  Title:Analysis of bulk temperature field and flash temperature for planet gear teeth
  Authors:Gong, Xiansheng1 ; Wang, Huanhuan1 ; Zhang, Ganqing1 ; Wang, Hongxia1 
  Author affiliation:1  State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China
  Corresponding author:Gong, X. (xsgong@cme.cqu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:209-216
  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:Applying the theories of Hertz contact, tribology, gear engagement and heat transfer, the planetary gear was taken as study object, the variation of sliding velocity and friction coefficient was investigated and the contact stress along the contact path was conducted. Heat transfer coefficient of gear end face and teeth surface and heat flux at different engaging positions were calculated. 3-D finite element models of gear teeth were established to predict stead temperature field. The influence of standard and modified profiles on temperature field and contact pressure was evaluated. Based on the results of stead thermal analysis, distribution of transient temperature field was investigated by using finite element method.
  Number of references:17
  Main heading:Gear teeth
  Controlled terms:Finite element method  -  Friction  -  Heat flux  -  Heat transfer  -  Temperature  -  Thermoanalysis  -  Three dimensional
  Uncontrolled terms:3D finite element model  -  Bulk temperatures  -  Contact paths  -  Contact pressures  -  Contact Stress  -  Finite Element  -  Flash temperatures  -  Friction coefficients  -  Hertz contact  -  Planetary Gears   -  Sliding velocities  -  Teeth surface  -  Temperature field  -  Transient temperature fields
  Classification code:931.1 Mechanics  -  921.6 Numerical Methods  -  902.1 Engineering Graphics  -  801 Chemistry  -  641.2 Heat Transfer  -  641.1 Thermodynamics  -  601.2 Machine Components
  Database:Compendex

15. Accession number:20114614514885
  Title:AMT electronic control system based on SOPC and quantum framework
  Authors:Qi, Shengbo1, 2 ; Zhang, Chengrui1 ; Luo, Ying1 
  Author affiliation:1  School of Mechanical Engineering, Shandong University, Ji'nan 250061, China
                 2  College of Engineering, Ocean University of China, Qingdao 266100, China
  Corresponding author:Zhang, C. (zhangchengrui@gmail.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:13-19
  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:Separation of software development and hardware development, and the lack of open in software, are all shortcomings of traditional embedded system. A comprehensive solution using software/hardware co-design and the quantum framework was presented and applied to AMT electrical control system design. Thus, a comprehensive development framework of "five layers/three buses/one framework" was formed. The embedded vanilla kernel was selected, and the quantum framework port about vanilla kernel and Nios II was given, as well as the designed main active object's HSM, which was more suitable than finite state machine for AMT system.
  Number of references:12
  Main heading:Quantum theory
  Controlled terms:Control systems  -  Design  -  Embedded software  -  Embedded systems  -  Finite automata  -  Software design  -  Systems analysis
  Uncontrolled terms:Active object  -  Automated mechanical transmissions  -  Co-designs  -  Electrical control system  -  Electronic control systems  -  Hardware development  -  Hierarchical state machines  -  NIOS II  -  Quantum framework  -  Software/hardware
  Classification code:408 Structural Design  -  721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory  -  723 Computer Software, Data Handling and Applications  -  731.1 Control Systems  -  931.4 Quantum Theory; Quantum Mechanics
  Database:Compendex

16. Accession number:20114614514912
  Title:Apple mealiness detection based on neighborhood rough set and hyperspectral scattering image
  Authors:Zhu, Qibing1 ; Huang, Min1 ; Zhao, Guilin1 
  Author affiliation:1  Key Laboratory of Advanced Process Control for Light Industry, Ministry of Education, Jiangnan University, Wuxi 214122, China
  Corresponding author:Zhu, Q. (zhuqib@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:154-157 161
  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:Nondestructive detection of apple mealiness was investigated by using neighborhood rough set theory and hyperspectral scattering image technology. Spectral scattering profiles between 600 nm and 1 000 nm were acquired by hyperspectral scattering image system for 576 apple samples. The optimal wavelength sets were chosen from 81 raw characteristic attributes by neighborhood rough set. 526 samples were selected randomly for calibration set and 50 samples were selected for validation set to develop classification model using optimal wavelengths coupled with support vector machine (SVM). Simulation was repeated 10 times to investigate the ability of classification model. Results showed that neighborhood rough set could select 14 optimal wavelengths effectively. The validation model using 14 optimal wavelengths yielded better result (classification accuracy 75%) than the full spectrum model (classification accuracy 71%) and the principle component analysis algorithm (classification accuracy 74%).
  Number of references:10
  Main heading:Rough set theory
  Controlled terms:Computer simulation  -  Fruits  -  Optimization  -  Principal component analysis  -  Scattering
  Uncontrolled terms:Apple  -  HyperSpectral  -  Mealiness  -  Nondestructive detection  -  Rough set
  Classification code:711 Electromagnetic Waves  -  723.5 Computer Applications  -  821.4 Agricultural Products  -  921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory  -  921.5 Optimization Techniques  -  922.2 Mathematical Statistics
  Database:Compendex

17. Accession number:20114614514883
  Title:Calculation of vehicle kingpin positional parameters based on steering test
  Authors:Guo, Konghui1 ; Li, Ning1 ; Jing, Lixin1 
  Author affiliation:1  State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
  Corresponding author:Guo, K. (guokonghui@gmail.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  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:Both tire contact point and wheel center is changed with rightward and leftward of vehicle steering by the effect of geometry of steering axis. It's benefit to calculate steering axis geometry by wheel movement for suspension design. A vehicle suspension Kinematics and Compliance (KnC) facility was used to get steering test data, such as kingpin inclination angle, caster angle, caster trail, scrub radius, spindle trail and kingpin offset at wheel center. The method was validated by the simulating result of Adams and test data, and errors were within the allowable range. The solution method met the requirement.
  Number of references:6
  Main heading:Steering
  Controlled terms:Automobile steering equipment  -  Automobile suspensions  -  Kinematics  -  Suspensions (components)  -  Wheels
  Uncontrolled terms:Caster angle  -  Kingpin inclination  -  Positional parameters of wheel  -  Solution methods  -  Suspension design  -  Test data  -  Tire contact
  Classification code:601.2 Machine Components  -  632.1 Hydraulics  -  663.2 Heavy Duty Motor Vehicle Components  -  931.1 Mechanics
  Database:Compendex

18. Accession number:20114614514913
  Title:Discriminant analysis of apple moldy core using near infrared diffuse reflectance spectroscopy based on principal component analysis
  Authors:Li, Shunfeng1 ; Zhang, Lihua1 ; Liu, Xinghua1 ; Li, Guanghui1 
  Author affiliation:1  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:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:158-161
  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 evaluate the ability of near infrared spectroscopy (NIRS) to detect moldy core in apple fruits, the discriminant efficiency of Fisher function based on several spectra preprocessing methods and principal component analysis (PCA) were investigated. Results showed that the discriminant efficiency of Fisher function established by 20 principal components (PCs) after vector normalization preprocess was the highest, discriminant efficiency for training sample set and test set were 89.9% and 87.8%, respectively.
  Number of references:10
  Main heading:Principal component analysis
  Controlled terms:Discriminant analysis  -  Efficiency  -  Fruits  -  Infrared devices  -  Near infrared spectroscopy  -  Spectrum analysis
  Uncontrolled terms:Apple  -  Apple fruits  -  Moldy core  -  Near Infrared  -  Near infrared diffuse reflectance  -  Preprocess  -  Principal Components  -  Spectra preprocessing  -  Test sets  -  Training sample   -  Vector normalization
  Classification code:741.3 Optical Devices and Systems  -  821.4 Agricultural Products  -  913.1 Production Engineering  -  922 Statistical Methods  -  922.2 Mathematical Statistics
  Database:Compendex

19. Accession number:20114614514922
  Title:Distribution characteristics of hydraulic motor with digital distribution
  Authors:Pan, Jian1 ; Shi, Guanglin1 
  Author affiliation:1  Institute of Mechatronics and Logistics Equipment, Shanghai Jiaotong University, Shanghai 200240, China
  Corresponding author:Pan, J. (pauljames@sohu.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:203-208
  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:A hydraulic motor with digital distribution mechanism based on high speed solenoid valves (HSV) was introduced. Firstly, the operating principle and the structure characteristics of the proposed hydraulic motor were described. Then, the mathematical model of the proposed hydraulic motor was established according to the distribution process for counter-clockwise and clockwise rotation by analyzing the piston dynamics of each plunger. The differences of the two distribution process were analyzed. The related simulation was conducted and the direction changing process of the proposed hydraulic motor was studied. The experiments were carried out to validate the effectiveness of the simulation results. Finally, the influence of the frequency of HSV was discussed and the performance was compared between the proposed motor and the traditional one.
  Number of references:7
  Main heading:Hydraulics
  Controlled terms:Hydraulic motors  -  Mathematical models  -  Solenoid valves  -  Solenoids
  Uncontrolled terms:Clockwise rotation  -  Counter-clockwise  -  Digital distribution  -  Distribution characteristics  -  Distribution process  -  High speed solenoid on-off valve  -  High-speed solenoid valve  -  Operating principles  -  Simulation result  -  Structure characteristic
  Classification code:619 Pipes, Tanks and Accessories; Plant Engineering Generally  -  632.1 Hydraulics  -  632.2 Hydraulic Equipment and Machinery  -  704.1 Electric Components  -  921 Mathematics
  Database:Compendex

20. Accession number:20114614514907
  Title:Sensing data compression method based on SPC for agri-food cold-chain logistics
  Authors:Qi, Lin1 ; Tian, Dong2 ; Zhang, Jian3 ; Zhang, Xiaoshuan2 ; Fu, Zetian1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
                 3  School of Economics and Management, Beijing Information Science and Technology University, Beijing 100192, China
  Corresponding author:Fu, Z. (fzt@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:129-134
  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 reduce the sensing data transfer frequency and node energy consumption in real-time cold-chain logistics monitoring system for agri-food based on wireless sensor networks, a sensing data compression method based on statistics process control was presented. The D-X-RS algorithm that fits for the sensor nodes' data processing capability was designed. The data compression performance of D-X-RS algorithm, threshold algorithm and K-means algorithm by cold-chain logistics environmental simulation in laboratory was compared. The result showed that the compression cost per point (CCP) of D-X-RS algorithm was close to the best algorithm both in temperature fluctuation and steady states. The algorithm had good balance and flexibility.
  Number of references:16
  Main heading:Data compression
  Controlled terms:Algorithms  -  Data handling  -  Data transfer  -  Energy utilization  -  Process control  -  Sensor nodes  -  Sensors  -  Telecommunication equipment  -  Wireless networks
  Uncontrolled terms:Cold-chain logistics  -  Compression methods  -  Compression performance  -  Environmental simulation  -  k-Means algorithm  -  Monitoring system  -  Node energy  -  Processing capability  -  Sensing data  -  Steady state   -  Temperature fluctuation  -  Threshold algorithms  -  Wireless sensor
  Classification code:921 Mathematics  -  801 Chemistry  -  731 Automatic Control Principles and Applications  -  723.2 Data Processing and Image Processing  -  723 Computer Software, Data Handling and Applications  -  722 Computer Systems and Equipment  -  718 Telephone Systems and Related Technologies; Line Communications  -  717 Optical Communication  -  716.3 Radio Systems and Equipment  -  716 Telecommunication; Radar, Radio and Television  -  525.3 Energy Utilization
  Database:Compendex

21. Accession number:20114614514886
  Title:Guidance line identification algorithm for AGV in complex environment
  Authors:Cai, Jinhui1, 2 ; Cai, Hui2, 3 ; Zhang, Guangxin2 ; Zhou, Zekui2 
  Author affiliation:1  College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
2  Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
                   3  National Electronic Information Products Quality Supervision and Inspection Center, Fujian Provincial Central Inspection Institute, Fuzhou 350002, China
  Corresponding author:Cai, J. (caijinhui@cjlu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:20-24 89
  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 quickly and accurately identify the guidance line in complex environment, a line recognition algorithm based on prior knowledge was proposed. Images were divided into several regions by field range and line characteristic. Both means of full image and region were used to make adaptive threshold of each region. Scanning mode was decided by information of previous image, then noises were filtered and intermediate points were acquired. An improved Hough transformation with search angle limitation and nonuniform sampling was applied to localize guidance line. Finally cross ratio theorem was used to calibrate the parameters. The experimental result showed the method was characterized by robustness and real-time, the average computing time was about 90 ms for each image.
  Number of references:16
  Main heading:Algorithms
  Controlled terms:Image processing  -  Mathematical transformations
  Uncontrolled terms:Adaptive thresholds  -  Angle limitation  -  Automated guided vehicles  -  Complex environments  -  Computing time  -  Cross-ratios  -  Hough Transformation  -  Identification algorithms  -  Line recognition  -  Nonuniform sampling   -  Prior knowledge  -  Road recognition  -  Scanning mode
  Classification code:723 Computer Software, Data Handling and Applications  -  741 Light, Optics and Optical Devices  -  921 Mathematics  -  921.3 Mathematical Transformations
  Database:Compendex

22. Accession number:20114614514920
  Title:Reliability-driven modeling approach of assembly process
  Authors:Zhang, Genbao1 ; Ge, Hongyu1 ; Wang, Guoqiang1 ; Liu, Jia1 
  Author affiliation:1  College of Mechanical Engineering, Chongqing University, Chongqing 400044, China
  Corresponding author:Zhang, G. (gen.bao.zhang@263.net
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:192-196
  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 the problem of difficulty to guarantee products assembly process reliability, reliability-driven modeling approach of the assembly process was presented based on grey system theory and polychromatic sets theory. A method was described to determine the major assembly process step to public the reliability. Impact factors of each working step were analyzed. The methods to establish the relationship matrix between the various factors and the process step and to determine the main factors of the assembly reliability were elaborated. The control measures for reliability of the main factors were proposed. The purpose of reliability-driven for assembly process was achieved by above methods. An example of controlling assembly process for a machining center NC rotary table reliability-driven showed the feasibility of the method.
  Number of references:12
  Main heading:Assembly
  Controlled terms:Process control  -  Reliability theory  -  System theory
  Uncontrolled terms:Assembly process  -  Grey system theory  -  Polychromatic sets theory  -  Reliability-driven  -  Rotary tables
  Classification code:731 Automatic Control Principles and Applications  -  913.1 Production Engineering  -  922.2 Mathematical Statistics  -  961 Systems Science
  Database:Compendex

23. Accession number:20114614514919
  Title:Adaptive internal model control for agricultural robot steering system
  Authors:Jiao, Jun1 ; Jiang, Chaohui1 ; Jin, Ruichun2 ; Xu, Zhengrong1 ; Liu, Bo1 
  Author affiliation:1  College of Information and Computer, Anhui Agricultural University, Hefei 230036, China
                 2  School of Computer and Information, Hefei University of Technology, Hefei 230009, China
  Corresponding author:Jiang, C. (jiangzh@ahau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:186-191 234
  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:Aiming at the characteristics of complex, time-delay and gain time-variation of agricultural robot steering system, the Adaline neural network (ANN) was applied to internal model control (IMC). An adaptive control method for time-delay online adjusting and gain control was proposed. An algorithm based on Adaline neural networks could adjust time-delay and gain adaptively, and overcome effects of time-variation parameters on IMC and plant model by online optimizing feedback error. Simulations and experimental results verified that compared to conventional PID control method, the proposed control method possessed the advantage of high precision, great adaptability and robustness, so it is feasible for agricultural robot steering system.
  Number of references:18
  Main heading:Adaptive control systems
  Controlled terms:Control theory  -  Delay control systems  -  Model predictive control  -  Neural networks  -  Proportional control systems  -  Robots  -  Three term control systems  -  Time delay  -  Two term control systems
  Uncontrolled terms:Adaline neural network  -  Agricultural robot  -  Internal model control  -  Nonlinear PID control  -  Steering system
  Classification code:713 Electronic Circuits  -  723.4 Artificial Intelligence  -  731 Automatic Control Principles and Applications  -  732 Control Devices
  Database:Compendex

24. Accession number:20114614514884
  Title:4WID-4WIS vehicle yaw control based on fuzzy logic control of AFS ARS DYC
  Authors:Yang, Fuguang1 ; Ruan, Jiuhong1, 2 ; Li, Yibin2 ; Rong, Xuewen2 ; Qiu, Xuyun1 ; Yin, Zhanfang3 
  Author affiliation:1  Advanced Vehicle and Robot Institute, Shandong Jiaotong University, Ji'nan 250023, China
                 2  School of Control Science and Engineering, Shandong University, Ji'nan 250061, China
                 3  94270 Unit of Chinese Liberation Army, Ji'nan 250117, China
  Corresponding author:Yang, F. (fuguang_y@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:6-12
  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 yaw stability control of 4WID-4WIS vehicle was studied. The coupling relationship between vehicle side slip angle and yaw rate was analyzed. A fuzzy yaw stability controller composed of active front steering (AFS), active rear steering (ARS) and direct yaw moment control (DYC) was designed based on the following strategy-when side slip angle was small, the main aim was to follow the anticipant yaw rate, and when side slip angle was big, the main aim was to reduce vehicle side slip angle. Simulations results indicated that compared with vehicle controlled by DYC, vehicle controlled by AFS ARS DYC (RFD) reduced the braking tore and longitudinal slipping rate obviously, which ensured the vehicle yaw stability with high speed on low friction road.
  Number of references:15
  Main heading:Automobile steering equipment
  Controlled terms:Fuzzy logic  -  Stability  -  Steering
  Uncontrolled terms:4WID-4WIS  -  Active front steering  -  Direct yaw moment control  -  Fuzzy logic control  -  Low friction  -  Sideslip angles  -  Vehicle yaw control  -  Yaw rate  -  Yaw stability
  Classification code:663.2 Heavy Duty Motor Vehicle Components  -  721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory  -  801 Chemistry  -  931 Classical Physics; Quantum Theory; Relativity  -  951 Materials Science  -  961 Systems Science
  Database:Compendex

25. Accession number:20114614514906
  Title:Quantitative analysis of straw content in co-firing biomass-coal blends by near infrared spectroscopy
  Authors:He, Cheng1 ; Yang, Zengling1 ; Huang, Guangqun1 ; Liao, Na1 ; Han, Lujia1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Han, L. (hanlj@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:125-128 104
  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:It is important to realize rapid detection of straw content in co-firing biomass-coal blends for drawing up reasonable precept about biomass co-firing power generation subsidy. The original samples were consisted of 81 straws and 9 coals collected from different regions and different varieties in China. 90 blends samples of coal and straw (1%-30%) were prepared after comminution and separated into a calibration set (60 samples) and an independent validation set (30 samples). Spectra were scanned by FT-NIR spectrometer. The interval partial least squares (iPLS) and the genetic algorithm (GA) were used for wavelength selection. Quantitative analysis models for straw content were established by partial least squares (PLS). The results showed that data points for modelling decreased from 3 001 to 33, determination coefficient, standard deviation of prediction (SEP) and ratio of performance to standard deviation (RPD) in validation were 0.89, 2.87% and 3.06 by GA-PLS method, respectively. It is concluded that NIRS with GA-PLS was feasible for fast quantitative analysis of the straw content in co-firing biomass-coal blends.
  Number of references:14
  Main heading:Coal
  Controlled terms:Biomass  -  Genetic algorithms  -  Grinding (comminution)  -  Infrared devices  -  Near infrared spectroscopy  -  Spectrometers  -  Statistics
  Uncontrolled terms:Biomass-coal blends  -  Co-firing  -  Data points  -  Determination coefficients  -  Interval partial least-squares (iPLS)  -  Near Infrared  -  Original sample  -  Partial least squares  -  Quantitative analysis model  -  Rapid detection   -  Standard deviation  -  Wavelength selection
  Classification code:922.2 Mathematical Statistics  -  921 Mathematics  -  802.3 Chemical Operations  -  741.3 Optical Devices and Systems  -  723 Computer Software, Data Handling and Applications  -  525.1 Energy Resources and Renewable Energy Issues  -  524 Solid Fuels
  Database:Compendex

26. ccession number:20114614514918
  Title:Effect of ph value on characteristics of shortcut nitrification for swine wastewater treatment under normal temperature
  Authors:Yan, Lilong1 ; Zhang, Ying1 ; Li, Chuanju1 ; Dai, Yingjie1 ; Han, Xue1 
  Author affiliation:1  School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China
  Corresponding author:Zhang, Y. (zhangyhrb@neau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:181-185 166
  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 achieve high efficient nitrogen removal from high ammonium-nitrogen swine wastewater, sequencing batch reactor activated sludge process (SBR) was used to treat swine wastewater to the phenomenon which the urea (mainly from pig urine) hydrolysis of swine wastewater was accompanied by changes of pH value. Under conditions of normal temperature (20°C) and non-restricted dissolved oxygen, effects of pH value and aeration time on ammonium removal, characteristics of shortcut nitrification were studied. The results showed that nitrite accumulation rate was 75%-80% when pH value was 7.0-9.5. Shortcut nitrification would not affected by long-term aeration. In the biological treatment process of high ammonium-nitrogen wastewater concentration, the nitrite accumulation was related to levels of pH value, free ammonia (FA) and free nitrite (FNA) in influent.
  Number of references:16
  Main heading:Activated sludge process
  Controlled terms:Ammonium compounds  -  Batch reactors  -  Biological water treatment  -  Denitrification  -  Dissolved oxygen  -  Nitration  -  Nitrification  -  Nitrogen  -  Nitrogen removal  -  Oxidation   -  pH effects  -  Urea  -  Wastewater  -  Wastewater treatment
  Uncontrolled terms:Ammonium removal  -  Biological treatment process  -  Effect of pH  -  Free ammonia  -  Nitrite accumulation  -  pH value  -  Pig urine  -  Sequencing batch reactors  -  Shortcut nitrification  -  Swine wastewater   -  Wastewater concentration
  Classification code:802.2 Chemical Reactions  -  802.1 Chemical Plants and Equipment  -  801.2 Biochemistry  -  801.1 Chemistry, General  -  804 Chemical Products Generally  -  452.4 Industrial Wastes Treatment and Disposal  -  445.1 Water Treatment Techniques  -  445 Water Treatment  -  444 Water Resources  -  452.3 Industrial Wastes
  Database:Compendex

27. Accession number:20114614514915
  Title:Mechanical model of cell in water stressed plant
  Authors:Li, Qinglin1 ; Mao, Hanping1 ; Li, Pingping1 ; Gu, Ji'nan2 
  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
                2  School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Mao, H. (maohp@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:167-170 175
  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 mechanical model of a cell was established by using finite element technique to study mechanical behavior of the cell on condition that the plant was water stressed. Based on the biophysical equation, the change of the turgor pressure in cell caused by transpiration was obtained. Then the dynamics equation of turgor pressure was got. The result showed the relation between the turgor pressure and the deformation of the cell. The results also showed that the radius of the cell decreased from 3.55×10-5 m to 2.42×10-5 m nonlinearly when the turgor pressure changed from 200 kPa to 120 kPa linearly; and the deformation was influenced by material mechanical parameter of cell wall. The radius of the cell was 3.58×10-5 m, 3.30×10-5 m, 3.13×10-5 m respectively as the Mooney-Rivlin constant (C1) was 0.7 MPa, 1.0 MPa, 1.5 MPa when the turgor pressure was 200 kPa; the radius of the cell was 1.41×10-5 m, 1.22×10-5 m, 1.10×10-5 m. respectively as the Mooney-Rivlin constant (C2) was 0.10 MPa, 0.15 MPa, 0.20 MPa when the turgor pressure was 200 kPa.
  Number of references:16
  Main heading:Cells
  Controlled terms:Behavioral research  -  Cytology  -  Deformation  -  Finite element method  -  Thermoelectricity
  Uncontrolled terms:Cell walls  -  Dynamics equation  -  Finite element techniques  -  Mechanical behavior  -  Mechanical model  -  Mechanical parameters  -  Plant cells  -  Turgor pressure  -  Water-stressed plants
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  461.2 Biological Materials and Tissue Engineering  -  615.4 Thermoelectric Energy  -  921.6 Numerical Methods  -  971 Social Sciences
  Database:Compendex

28. Accession number:20114614514891
  Title:Analysis of distribution of displacement on soil surface in front of plow with FEM
  Authors:Zhai, Lixin1 ; Ji, Changying1 ; Ding, Qishuo1 ; Yu, Yinmei1 
  Author affiliation:1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
  Corresponding author:Ji, C. (chyji@njau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:45-50
  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 plough surface was re-formed by using Pro/E's functions based on measured points, which were scaled with 3-D coordinate scale instrument. And then ANSYS/LS-DYNA software was used to carry out the turning dynamics simulation of the tilling plough. The direction of soil velocity was vertical to the surface of plough, and its distribution was like radiating. The distribution of equivalent stress was like isoline, and the data was becoming smaller from the contact point to outer. The results of simulation were verified by the data of experiments in soil bin.
  Number of references:20
  Main heading:Soils
  Controlled terms:Bins  -  Computer software  -  Experiments  -  Finite element method  -  Reverse engineering
  Uncontrolled terms:Contact points  -  Dynamics simulation  -  Equivalent stress  -  Measured points  -  Plough surface  -  Soil displacement  -  Soil surfaces
  Classification code:483.1 Soils and Soil Mechanics  -  694.4 Storage  -  723 Computer Software, Data Handling and Applications  -  901.3 Engineering Research  -  921.6 Numerical Methods
  Database:Compendex

29. Accession number:20114614514902
  Title:Influence of trapping light source illuminance gradient on locusts' phototactic effect
  Authors:Liu, Qihang1 ; Zhou, Qiang1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Zhou, Q. (zq@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:105-109 140
  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 make the research on the design of locusts' LED trapping light and digital control of induced light field by utilizing LED light source and homemade phototactic behavior trial equipment, the comparative tests of locusts' phototactic behavior for the choice of purple light, purple-blue-green light in different time periods were carried out by adopting contrast experimental method. The reason affecting locusts' phototactic behavior was analyzed. The results suggested that locusts' phototactic choosing behavior was relevant with spectrum, illuminance gradient, internal biological features and environmental factors under the same illuminance gradient. Locusts' phototactic behavior choosing purple light was higher than purple-blue-green, under the different illuminance gradient. Locusts tended to select the stronger illuminance gradient. When the illuminance gradient of purple-blue-green was 10 times higher than purple light, locusts' selective response to purple-blue-green light was superior to purple light. Locusts' internal biological features and environmental factors restricted the increasing effect of locusts' phototactic behavior by improving light intensity in the different time periods. The sensitive degree of locusts' phototactic response to purple light as well as purple-blue-green light at night was different, locusts' phototactic behavior showed that locusts' phototactic sensitive critical point, the optimal and the best range of light illuminance values, locusts responding to purple light as well as purple-blue-green light in the different time periods of night, was different.
  Number of references:11
  Main heading:Light emitting diodes
  Controlled terms:Digital control systems  -  Light sources
  Uncontrolled terms:Biological features  -  Comparative tests  -  Critical points  -  Digital control  -  Environmental factors  -  Experimental methods  -  Illuminance gradient  -  Increasing effect  -  LED light source  -  Light fields   -  Light illuminance  -  Light intensity  -  Locusts  -  Phototactic behavioral response  -  Time-periods  -  Trapping light source
  Classification code:722.4 Digital Computers and Systems  -  741.1 Light/Optics  -  744 Lasers
  Database:Compendex

30. Accession number:20114614514921
  Title:Elastic dynamics analysis of delta parallel robot
  Authors:Han, Yafeng1 ; Ma, Lüzhong1 ; Wu, Weiguang1 ; Chen, Xiuxiang1 
  Author affiliation:1  School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Ma, L. (mlz@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:197-202
  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 differential equation of motion of the Delta parallel robot flexible component was established by the finite element theory, the mechanism's dynamics model was gained by combining the kinematic characteristics and specifying the direction of the node displacement. The real motion of mechanism was regarded as the superposition of the nominal motion and elastic vibration. The position and direction error of the moving platform was regarded as the perturbation of nominal motion. The relation equation of configuration error and node displacement of moving platform was obtained. In the example, the characteristic of modal frequency of mechanism in the workspace was gained by considering the gravity, inertial force and damping dynamic response under the action. The 6-D error of the moving platform was evaluated comprehensively.
  Number of references:13
  Main heading:Robots
  Controlled terms:Dynamic response  -  Dynamics  -  Equations of motion  -  Finite element method
  Uncontrolled terms:Delta parallel robot  -  Dynamics analysis  -  Dynamics models  -  Elastic dynamics  -  Elastic vibration  -  Finite Element  -  Flexible components  -  Inertial forces  -  Kinematic characteristics  -  Modal frequency   -  Moving platform  -  Parallel robots  -  Real motion
  Classification code:408.1 Structural Design, General  -  731.5 Robotics  -  921.6 Numerical Methods  -  931.1 Mechanics
  Database:Compendex

31. Accession number:20114614514914
  Title:NIR quantitative model optimization of fatty acid in edible oil based on CARS-PLS
  Authors:Wu, Jingzhu1 ; Xu, Yun2 
  Author affiliation:1  School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China
                 2  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Wu, J. (pubwu@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:162-166
  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:Competitive adaptive reweighted sampling (CARS) method was employed to improve the prediction accuracy of the NIR quantitative model of four kinds of fatty acid (palmitic acid, stearic acid, oleic acid and linoleic acid) in edible oil.Predict concentration residual method was employed to detect the outlier before preprocessing the spectroscopy by normalization.The key variables were selected by CARS method.The partial least squares (PLS) calibration models of four kinds of fatty acid were established respectively in the optimal conditions, and compared with the results using OPUS software. Determination coefficient (R2), root mean square error of cross validation(RMSECV)and root mean square error of prediction (RMSEP) were used to evaluate the quality of the modes.The results showed that better prediction was obtained by CARS. The result showed that using CARS could effectively simplify the model and the less number of wavelength variables selected could be reference for developing filter spectrometer of edible oil.
  Number of references:14
  Main heading:Palmitic acid
  Controlled terms:Coherent scattering  -  Forecasting  -  Infrared devices  -  Infrared spectroscopy  -  Least squares approximations  -  Linoleic acid  -  Mean square error  -  Oleic acid  -  Optimization  -  Spectrometers   -  Stearic acid  -  Unsaturated fatty acids
  Uncontrolled terms:Calibration model  -  Competitive adaptive reweighted sampling  -  Cross validation  -  Determination coefficients  -  Edible oil  -  Key variables  -  Optimal conditions  -  Partial least squares  -  Prediction accuracy  -  Quantitative models   -  Residual method  -  Root mean square errors  -  Root-mean-square error of predictions
  Classification code:711 Electromagnetic Waves  -  731.1 Control Systems  -  741.1 Light/Optics  -  741.3 Optical Devices and Systems  -  804.1 Organic Compounds  -  921 Mathematics
  Database:Compendex

32. Accession number:20114614514903
  Title:Grey predictive fuzzy control system of forward speed for combine harvester
  Authors:Chen, Jin1 ; Zheng, Shiyu1 ; Li, Yaoming2 ; Lü, Shijie1
Author affiliation:1  School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
                 2  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Li, Y. (ymli@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:110-115
  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 working process of combine harvester was analyzed, aiming at the properties of nonlinear, time varying and delay. Fuzzy control with grey prediction algorithm was used to control the speed of combine harvester and keep the load stable. The necessity and importance of the combining predictive control with fuzzy control was analyzed. Forward speed control device for combine harvester based on grey prediction fuzzy control was designed. The grey prediction fuzzy control model was established, simulated and tested. The results showed that the control system with the grey prediction fuzzy control algorithm had shorter adjustment time, smaller overshoot and more superior control performance.
  Number of references:10
  Main heading:Harvesters
  Controlled terms:Algorithms  -  Computer simulation  -  Control systems  -  Forecasting  -  Fuzzy control
  Uncontrolled terms:Combine harvesters  -  Control device  -  Control performance  -  Forward speed  -  Fuzzy control models  -  Grey prediction  -  Predictive control  -  Predictive fuzzy control  -  Time varying  -  Working process
  Classification code:723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  731 Automatic Control Principles and Applications  -  731.1 Control Systems  -  821.1 Agricultural Machinery and Equipment  -  921 Mathematics
  Database:Compendex

33. Accession number:20114614514904
  Title:Obstacle avoiding system of mountain orchard steel wire rope traction cargo vehicle based on ultra-sonic sensing
  Authors:Li, Zhen1 ; Lu, Jia'na2 ; Hong, Tiansheng1 ; Song, Shuran1 ; Huang, Jiayang2 ; Chen, Huixin2 
  Author affiliation:1  Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Edu., South China Agricultural University, Guangzhou 510642, China
                2   College of Engineering, South China Agricultural University, Guangzhou 510642, China
  Corresponding author:Hong, T. (tshong@scau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:116-120
  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 avoid crashing into people going through the rail or other obstacles and improving the system's safety and stability, an obstacle avoiding system of mountain orchard steel wire rope traction cargo vehicle was designed. The system was composed of STC single-chip micro-controller, ultra-sonic range measurement modules, infrared detection unit, wireless communication module, voice alarm and manual control module. The system was designed to achieve an obstacle detection distance of no less than 150 cm and a 100% successful braking rate. System verification test results indicated that: when using static obstacle, the minimum vehicle-to-obstacle distance was 100 cm after uphill brake and the minimum vehicle-to-obstacle distance was 90 cm after downhill brake. When using motion obstacle, the minimum vehicle-to-obstacle distance and time delay were 98 cm and 0.64 s, respectively after uphill brake. The minimum vehicle-to-obstacle distance and time delay were 66 cm and 1.30 s after downhill brake.
  Number of references:12
  Main heading:Vehicles
  Controlled terms:Brakes  -  Landforms  -  Mooring  -  Obstacle detectors  -  Orchards  -  Time delay  -  Traction (friction)  -  Wire  -  Wire rope  -  Wireless telecommunication systems
  Uncontrolled terms:Cargo vehicles  -  Infrared detection  -  Mountain orchard  -  Obstacle avoiding system  -  Obstacle detection  -  Obstacle-avoiding  -  Range measurements  -  Single-chip  -  Static obstacles  -  Steel wire rope   -  System verifications  -  Voice alarms  -  Wireless communications
  Classification code:731 Automatic Control Principles and Applications  -  717 Optical Communication  -  716 Telecommunication; Radar, Radio and Television  -  713 Electronic Circuits  -  682.1.1 Railroad Cars  -  821.3 Agricultural Methods  -  681.3 Railroad Signals and Signaling  -  602 Mechanical Drives and Transmissions  -  535.2 Metal Forming  -  481.1 Geology  -  432 Highway Transportation  -  672 Naval Vessels
  Database:Compendex

34. Accession number:20114614514898
  Title:Analysis of rice seedlings passing through separating chutes based on high speed photography technology
  Authors:Ma, Ruijun1 ; Wang, Kaizhan2 ; Ma, Xu1 ; Zhang, Yali1 ; Wang, Zhaojun1 ; Gong, Haiming1 
  Author affiliation:1  College of Engineering, South China Agricultural University, Guangzhou 510642, China
                 2  Communications Commission of Guangzhou Municipality, Guangzhou 510032, China
  Corresponding author:Ma, R. (maruijun_mrj@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:84-89
  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 process of rice seedlings passing through the separating chutes was observed using high speed photography technology. The circular arc part of chutes was the key that affects the rice seedlings passing through chutes. It was easier for rice seedlings to pass chute No.4-7 than No.1-3. The time of rice seedlings passing through chutes was shorter and closed to simulation results calculated by computer when water content of nutrient soil of rice seedlings was 26.6%. It need the longest time when rice seedlings pass through chute No.1. The shortest time appeared when rice seedlings passing through chute No.6. The results of experiment showed that chutes of separating rice seedlings could be satisfied the requirements of throwing transplant machine for rice seedlings sprouted in the plastic cell-tray.
  Number of references:25
  Main heading:High speed photography
  Controlled terms:Computer simulation  -  High speed cameras  -  Seed  -  Water content
  Uncontrolled terms:Circular arc  -  Rice seedlings  -  Separating chutes  -  Simulation result
  Classification code:444 Water Resources  -  723.5 Computer Applications  -  742.1 Photography  -  742.2 Photographic Equipment  -  821.4 Agricultural Products
  Database:Compendex

35. Accession number:20114614514917
  Title:Influence of film-preload on ultimate bearing capacity of multi-span plastic greenhouse
  Authors:Wang, Xinzhong1 ; Ma, Xingchao1 ; Mao, Hanping1 
  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Wang, X. (wangxinzhong@gmail.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:176-180 216
  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:The integral structure of the multi-span plastic greenhouse was taken as the research subject, and influence of film-preload on ultimate bearing capacity of the multi-span plastic greenhouse was studied through physical model test and finite element analysis. By using ANSYS 10.0, firstly, temperature load was performed to numerically simulate preload, the computational models of greenhouse structure on six kinds of film-preloads condition were established by imposing temperature load. Then, dual nonlinear analysis to the computational model of greenhouse structure was given on snow load condition. Therefore, ultimate bearing capacity was confirmed by racing the balance path of the loading-displacement curve. According to analyze loading-displacement curve, influence of the film-preload on ultimate bearing capacity could be researched. It could be concluded that film-preload would not affect the integral structural buckling mode of multi-span plastic greenhouse, but would reduce ultimate bearing capacity of greenhouse structure by 17%-63%.
  Number of references:16
  Main heading:Bearing capacity
  Controlled terms:Bearings (structural)  -  Computational methods  -  Finite element method  -  Greenhouses  -  Nonlinear analysis  -  Offshore pipelines  -  Structural dynamics
  Uncontrolled terms:Buckling mode  -  Computational model  -  Film-preload  -  Greenhouse structure  -  Multi-spans  -  Physical model test  -  Plastic greenhouse  -  Preloads  -  Research subjects  -  Snow loads   -  Temperature loads  -  Ultimate bearing capacity
  Classification code:921.6 Numerical Methods  -  921 Mathematics  -  619.1 Pipe, Piping and Pipelines  -  421 Strength of Building Materials; Mechanical Properties  -  408.2 Structural Members and Shapes  -  408 Structural Design  -  402.1 Industrial and Agricultural Buildings
  Database:Compendex

36. Accession number:20114614514899
  Title:Temperature field analysis of water immersion temperature rice seed soaking germination equipment
  Authors:Tao, Guixiang1 ; Yi, Shujuan2 ; Li, Zuotong3 ; Shi, Dehui4 
  Author affiliation:1  College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, China
                  2  College of Information Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
                  3  College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China
                  4  Heilongjiang Province Qindeli Farm, Tongjiang 156400, China
  Corresponding author:Yi, S. (yishujiuan_2005@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  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:Temperature field analysis of water immersion temperature rice seed soaking germination equipment was analyzed by finite element method. Simulation analysis showed the highest temperature during soaking appeard in the edge of rice in contact with water. The lowest temperature appeared in the center of rice seed. With the increasing of germination time, the heat transferd to the center of rice seed continuedly. The center temperature reached to 25°C and the highest temperature reached to 31°C after 23 h, then the temperature of rice seed reached to the optimum tempreture of 25-31°C. Experiment result was consistent with the simulation results.
  Number of references:12
  Main heading:Seed
  Controlled terms:Cultivation  -  Finite element method  -  Temperature
  Uncontrolled terms:Highest temperature  -  Rice seed  -  Simulation analysis  -  Simulation result  -  Soaking germination  -  Temperature field  -  Temperature field analysis  -  Water immersion
  Classification code:641.1 Thermodynamics  -  821.3 Agricultural Methods  -  821.4 Agricultural Products  -  921.6 Numerical Methods
  Database:Compendex

37. Accession number:20114614514916
  Title:Simulation of phosphorus uptake and partitioning in greenhouse cucumber
  Authors:Ni, Jiheng1 ; Mao, Hanping1 ; Zhao, Wenbing1 ; Ma, Wanzheng1 
  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Mao, H. (maohp@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:171-175
  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 relationship between phosphors uptake, partitioning, radiation and temperature, a simulation model of greenhouse cucumber phosphorus uptake and partitioning was established. Different experiment data was used to validate the model. The results showed that the coefficients of determination between predicted and measured value based on the 1:1 line were 0.91, 0.74, 0.65, 0.72, 0.65, respectively, and the root mean squared error between the predicted and the measured value was 0.04 g/plant, 0.03%, 0.04%, 0.02%, 0.06%, respectively, for phosphorus uptake, root, stem, leaf and fruit phosphorus content. The model could give satisfactory prediction of phosphorus uptake and root, stem, leaf and fruit phosphorus content of greenhouse cucumber in different seasons.
  Number of references:14
  Main heading:Computer simulation
  Controlled terms:Fruits  -  Greenhouses  -  Phosphorus
  Uncontrolled terms:Cucumber  -  Experiment data  -  Greenhouse cucumbers  -  Partitioning  -  Phosphorus contents  -  Phosphorus uptake  -  Root mean squared errors  -  Satisfactory predictions  -  Simulation model  -  Uptake   -  Value-based
  Classification code:723.5 Computer Applications  -  804 Chemical Products Generally  -  821.4 Agricultural Products  -  821.6 Farm Buildings and Other Structures
  Database:Compendex

38. Accession number:20114614514896
  Title:High-speed photography analysis on operating process of improved clamping dibbler for cotton
  Authors:Wang, Jikui1 ; Guo, Kangquan2 ; Lü, Xinmin2 ; Jiang, Bei1 ; Li, Bin1 
  Author affiliation:1  College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
2  College of Mechanical and Electrical Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corrsponding author:Guo, K. (jdgkq@nwsuaf.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:74-78
  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:For the randomness and uncertainty of seed movement in sowing process of the clamping dibbler, high-speed photography technique was used to analyze the operating process of the improved clamping dibber. The seeds in seed-collecting area could make two seeds circulation movements flows, which could make twice scouring seed-filling, and the seed speed relative to the seed-room was greater than unimproved dibbler, so the probability of seed-filling was increased. The main reason leading to seed-missing of seed-collecting devices was that two seeds were placed in parallel in the seed-clamping mouth. There were three ways to achieve seed-cleaning operation, one was that seeds fall under the action of gravity, another was that seeds were squeezed out the seed-clamping mouth with the seed-clamping mouth litter, and the third was that seeds fall due to the equilibrium position of seeds disappear as the dibbler rotating. The average velocity of seeds entering the seed-clamping mouth decreased gradually with increasing of dibbler rotational speed. The findings were beneficial to comprehend the working process of dibbler microscopically.
  Number of references:11
  Main heading:High speed photography
  Controlled terms:Cleaning  -  Cotton  -  High speed cameras  -  Seed  -  Speed  -  Uncertainty analysis
  Uncontrolled terms:Average velocity  -  Dibbler  -  Equilibrium positions  -  High-speed photography technique  -  Operating process  -  Rotational speed  -  Working process
  Classification code:742.1 Photography  -  742.2 Photographic Equipment  -  802.3 Chemical Operations  -  821.4 Agricultural Products  -  922.1 Probability Theory  -  931.1 Mechanics
  Database:Compendex

39. Accession number:20114614514888
  Title:Engine output torque real-time calculation for parallel-serial HEV
  Authors:Guo, Hailong1, 2 ; Li, Lifu1, 3 
  Author affiliation:1  Department of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
                 2  Department of Automobile, Guangdong Communication Polytechnic, Guangzhou 510650, China
                 3  State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China
  Corresponding author:Guo, H. (aaalong_2002@sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:30-34
  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:Aiming at the problem of error between the actual value and estimated value of engine's dynamic torque, as well as HEV's energy control strategy cannot be executed accurately. Taken parallel-serial HEV as an example, the parameters of power coupling mechanism were analyzed. Planet gear power coupling mechanism's dynamics characteristic and efficiency characteristic were applied to deduce the algorithm of engine output torque calculation method for parallel-serial HEV. The experiment results showed that the maximum relative error of engine dynamic torque between theory calculating and experiment testing was decreased from 5%-8% to 3.94%.
  Number of references:10
  Main heading:Engines
  Controlled terms:Dynamics  -  Electric vehicles  -  Experiments  -  Torque
  Uncontrolled terms:Dynamics characteristic  -  Efficiency characteristic  -  Engine dynamics  -  Engine output torque  -  Experiment testing  -  Hybrid electric vehicle  -  Maximum relative errors  -  Parallel-serial  -  Power coupling  -  Real-time calculations
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  432 Highway Transportation  -  612 Engines  -  901.3 Engineering Research  -  931.1 Mechanics
  Database:Compendex

40. Accession number:20114614514890
  Title:Modeling and optimization of working cycle time for load sensing hydraulic excavator
  Authors:Qiu, Qingying1 ; Lu, Yin1 ; Feng, Peien1 ; Guan, Cheng1 ; Wu, Jianwei1 
  Author affiliation:1  Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
  Corresponding author:Qiu, Q. (medesign@zju.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:39-44 73
  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 optimization model for load sensing hydraulic excavator was established, in which the largest flow areas of hydraulic multi-way valves were taken as main design variables and working cycle time was taken as the main objective while the other design requirements were used as main constraint conditions. An optimizing example was presented. The result showed that the cycle time was reduced from 14.04 s to 12.61 s. Meanwhile, most of the other performance indexes were also improved. The largest optimized digging force of bucket cylinder and arm cylinder were increased by 4.38 kN and 3.61 kN, respectively. The largest digging height and the largest digging radius were increased by 189 mm and 37 mm, respectively. The generalized optimization of entire system and overall performance for excavator was realized.
  Number of references:6
  Main heading:Excavation
  Controlled terms:Construction equipment  -  Cylinders (shapes)  -  Excavators  -  Hydraulics  -  Optimization
  Uncontrolled terms:Constraint conditions  -  Cycle time  -  Design requirements  -  Design variables  -  Digging forces  -  Entire system  -  Flow area  -  Hydraulic excavator  -  Load sensing  -  Modeling and optimization   -  Optimization models  -  Performance indices  -  Working cycle
  Classification code:405.1 Construction Equipment  -  405.2 Construction Methods  -  408.2 Structural Members and Shapes  -  632.1 Hydraulics  -  921.5 Optimization Techniques
  Database:Compendex

41. Accession number:20114614514905
  Title:Modeling of organic matter degradation and thermal balance during pig slurry aerobic composting
  Authors:Wang, Yongjiang1 ; Huang, Guangqun1 ; Han, Lujia1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Han, L. (hanlj@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:121-124 115
  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:Modeling of organic matter degradation and thermal balance were built based on the first order assumption with respect to the quantity of biodegradable volatile solid (BVS) and the law of thermal conservation during composting. Different kinds of organic matter were mainly degraded in different composting stages. For the organic matter degradation model, temperature, moisture content, oxygen content and free air space were considered as key influence factors to degeneration rate. For the model of thermal balance, forced convention and conduction were considered as the main heat removal form. In order to verify the constructed models, an aerobic composting process of pig slurry was conducted. Temperature, oxygen content, moisture content and organic matter concentration were all monitored in the process of composting. The results could be helpful for guiding composting process operation.
  Number of references:12
  Main heading:Organic compounds
  Controlled terms:Biogeochemistry  -  Biological materials  -  Degradation  -  Mammals  -  Mathematical models  -  Moisture  -  Moisture determination  -  Oxygen  -  Slurry pipelines
  Uncontrolled terms:Aerobic composting  -  Composting process  -  Degradation model  -  First order  -  Free air spaces  -  Heat removal  -  Influence factors  -  Oxygen content  -  Pig slurries  -  Thermal balance   -  Volatile solid
  Classification code:921 Mathematics  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  944.2 Moisture Measurements  -  802.2 Chemical Reactions  -  801.3 Colloid Chemistry  -  481.2 Geochemistry  -  461.2 Biological Materials and Tissue Engineering  -  801.4 Physical Chemistry
  Database:Compendex

42. Accession number:20114614514895
  Title:Double-roller peanut sheller with pneumatic circulating
  Authors:Gao, Lianxing1 ; Du, Xin1 ; Zhang, Wen1 ; Liu, Mingguo1, 2 ; Liu, Xin1 ; Yang, Jing1 
  Author affiliation:1  College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
                 2  Liaoning Province Farm Machinery Quality Supervise Administration, Shenyang 110034, China
  Corresponding author:Gao, L. (lianxing_gao@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:68-73
  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 overall structure, work process and technical characteristics of the developed double-roller pneumatic circulating peanut sheller were summarized and the key work parts of the shelling device of double-roller, the cleaning device and the transmission system were designed. The double-roller shelling device was composed of primary shelling roller with different diameters and speeds, secondary shelling roller and each concave screen. The cleaning device was mainly composed of vibrating screen and air blower. Tests results of peanut shelling showed that the comprehensive performance indexes were: 1.82% for damaged peanut, 99.12% for the net rate of removal and 0.40% for the loss rate of peanut when the experiment was carried on the variety of peanut Huayu 23 with moisture content, and 296 r/min for the speed of first peanut sheller and 392 r/min for the second peanut sheller.
  Number of references:16
  Main heading:Rollers (machine components)
  Controlled terms:Air cleaners  -  Pneumatics
  Uncontrolled terms:Cycle shelling  -  Double-roller  -  Peanut  -  Pneumatic conveying  -  Sheller
  Classification code:601.2 Machine Components  -  632.3 Pneumatics  -  651.2 Wind Tunnels
  Database:Compendex

43. Accession number:20114614514894
  Title:9QP-830 soil-gashing and root-cutting mechanism
  Authors:You, Yong1 ; Wang, Decheng1 ; Wang, Guanghui1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Wang, D. (wdc@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:61-67
  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 soil-gashing and root-cutting mechanism was designed and tested in order to improve degenerated Leymus-chinensis grassland in China. The mechanism had eight equally-spaced sets of cutting blades on a blade shaft, and each set consisted of 3 blades. These blades were keyed on the blade shaft as double-helical arrangement through flange hubs. The blade on the shaft was powered by a final drive which was driven by a universal shaft connected to the tractor PTO. Cutting depth was controlled from 100 mm to 200 mm by two gauge wheels mounted on the rear end of the tool frame. Field experiment indicated that the mechanism could cut consecutive slits in compacted top soil. The maximum cutting depth was 205 mm and the average width of slits was below 13 mm. No soil overturning and vegetation destruction were observed. Because the slits cut by the mechanism provided soil aeration and promoted the growth of Leymus-chinensis, the soil bulk density decreased and crop yield increased by nearly double in the second year of soil-gashing and root-cutting treatment.
  Number of references:21
  Main heading:Soils
  Controlled terms:Agriculture  -  Machining  -  Mechanisms  -  Soil mechanics
  Uncontrolled terms:Average width  -  Crop yield  -  Cutting blades  -  Cutting depth  -  Double-helical  -  Field experiment  -  Final drive  -  Leymus-chinensis  -  Mechanical remediation  -  Soil aeration   -  Soil bulk density  -  Soil compaction  -  Soil-gashing and root-cutting  -  Top soils  -  Vegetation destruction
  Classification code:483.1 Soils and Soil Mechanics  -  601.3 Mechanisms  -  604.2 Machining Operations  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
  Database:Compendex

44. Accession number:20114614514897
  Title:Analysis of rice seeds motion on vibrating plate using EDEM
  Authors:Chen, Jin1 ; Zhou, Han1 ; Zhao, Zhan2 ; Li, Yaoming2 ; Gong, Zhiqiang1 
  Author affiliation:1  School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
                 2  Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Chen, J. (chenjinjd126@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:10
  Issue date:October 2011
  Publication year:2011
  Pages:79-83 100
  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:Rice seeds motion on a vibrating plate was simulated using discrete element method software EDEM. The mechanical interaction forces, both between seed and the plate and among the seeds were modeled by Hertz-Mindlin (no slip). With the variation of vibration frequency, amplitude and seeds initial thickness, their effects on the seeds spatial distribution were analyzed. The simulation area was divided into uniform layers in vertical direction and the seeds spatial distribution in layers at different time was obtained. The simulation results showed that with the plate vibration frequency of 11-12 Hz, vibration amplitude of 12-13 mm and seeds initial layer number of 3-5, the ideal seeds spatial distribution which was beneficial to improve suction precision could be received. Plate vibration frequency, vibration amplitude, seeds initial thickness and sucking distance were selected as influencing factors, then orthogonal experiments were carried out on test-rig and results indicated that the precision suction ratio was greater than 93% with the plate vibration frequency of 11 Hz, vibration amplitude of 12 mm and seeds initial layer number of 4.
  Number of references:13
  Main heading:Vibration analysis
  Controlled terms:Mindlin plates  -  Spatial distribution
  Uncontrolled terms:Air-suction  -  Influencing factor  -  Initial thickness  -  Layer number  -  Mechanical interactions  -  Orthogonal experiment  -  Plate vibration  -  Precision seeder  -  Rice seed  -  Simulation   -  Simulation result  -  Suction ratio  -  Super rice  -  Uniform layer  -  Vertical direction  -  Vibrating plate  -  Vibration amplitude  -  Vibration frequency
  Classification code:408.2 Structural Members and Shapes  -  921 Mathematics  -  943.2 Mechanical Variables Measurements
  Database:Compendex
 
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