2008年第39卷第10期共收錄44篇
1. Accession number: 084611708490
Title:Evaluation of agricultural equipment level based on factor analysis
Authors:Wu, Xiaotao; Wang, Decheng; Fang, Xianfa
Author affiliation:China Agricultural University, Beijing 100083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 100-104
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: An evaluation of the agricultural equipment level of provinces and regions in China was made by factor analysis. On the basis of designing principle of evaluation index system, the evaluation index system has been constructed for agricultural equipment level of our country. 25 provinces and regions have been chosen as samples and an evaluation for agricultural equipment level was made by factor analysis. In accordance with the comprehensive score sequence and comparative analysis of agricultural equipment level of every province and region, the conclusion was drawn that agricultural equipment level in China was unbalanced, therefore, a suggestion was put forward that based on context and real condition, we should promote the balance development of agricultural equipment level in China.
Number of references:12
Database:Compendex
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2. Accession number:084611708470
Title:Active control of vehicle suspension and steering system based on hierarchical strategy
Authors:Zhu, Hui; Chen, Wuwei
Author affiliation:Hefei University of Technology, Hefei 230009, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 1-6
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Seven degrees of freedom active control model was set up for suspension system, the optimal controller was designed, and the optimal control rate of the stochastic state feedback regulator was obtained by using the separation theorem. The slide mode controller (SMC) which could track the target yaw rate was designed after setting up the mode of the active front steering system. In order to improve the vehicle ride comfort on steering condition, one upper coordinated controller was designed. Based on the vehicle sensors, the upper coordinated controller has been real-timely inputted into the steering and suspension system different tracking targets and controls parameters.The simulation results showed that the controllers could preferably improve the ride comfort and the maneuver stabilization of the vehicle.
Number of references:11
Ei main heading: Automobile parts and equipment
Ei controlled terms: Automobile steering equipment-Automobile suspensions-Control system analysis-Control theory - Feedback - Neural networks-State feedback- Steering-Stochastic models- Suspensions (components) - Vehicle suspensions - Vehicles
Uncontrolled terms: Active front steering-Active suspension system-Hierarchy-Simulation- Coordinated controllers- Active controls - Suspension systems - Optimal controls - Vehicle rides - Yaw rates - Optimal controllers - Degrees of freedoms - Slide mode controllers - Vehicle sensors - Tracking targets - Simulation results - Ride comforts - Separation theorems - Steering systems
Ei classification codes: 432 Highway Transportation - 461.1 Biomedical Engineering - 601.2 Machine Components - 632.1 Hydraulics - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment - 723.4 Artificial Intelligence - 731.1 Control Systems - 922.1 Probability Theory
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3. Accession number:084611708474
Title: Design and testing on the hydro-pneumatic suspensions with controllable stiffness and
damping
Authors: Yang, Jie; Chen, Sizhong; Wu, Zhicheng; Zhao, Yiwei; Yang, Bo
Author affiliation: Beijing Institute of Technology, Beijing 100081, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 20-24 6
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A kind of hydro-pneumatic suspension with controllable stiffness and damping was designed. A complex nonlinear mathematic model of hydro-pneumatic suspensions was set up on the basis of comprehensive analysis of its working principle and structure. Simulation results comparison and theoretical analysis with the test data of bench test showed that the mathematic model is authentic. The volume of gas accumulator markedly affected the stiffness of hydro-pneumatic suspension, and the size of throttle notably affected the damping of the hydro-pneumatic suspension. The total volume of gas accumulator could be controlled by changing the number of gas accumulators, and the stiffness of hydro-pneumatic suspension could be controlled further more; the damping of hydro-pneumatic suspension could also be controlled by changing the size of throttle.
Number of references:10
Ei main heading: Suspensions (components)
Ei controlled terms: Damping - Electric network analysis - Pneumatic control - Pneumatics - Stiffness - Suspensions (fluids) - Vehicle suspensions Uncontrolled terms:Controllable damping - Controllable stiffness - Hydro-pneumatic suspensions - Pneumatic suspensions - Controllable stiffnesses - Volume of gasses - Test datums - Theoretical analyses - Gas accumulators - Simulation results - Working principles - Comprehensive analysis - Mathematic models - Bench tests - Nonlinear mathematic models
Ei classification codes: 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 601.2 Machine Components - 632.3 Pneumatics - 703.1.1 Electric Network Analysis - 731.1 Control Systems - 801.3 Colloid Chemistry - 804 Chemical Products Generally - 931.1 Mechanics - 951 Materials Science
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4. Accession number:084611708472
Title:Vehicle dynamics modeling for simulator of vehicle driver assistant systems
Authors:Wu, Lijun; Wang, Jianqiang
Author affiliation:Tsinghua University, Beijing 100084, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 10-14 29
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A hardware-in-the-loop simulator used for the development of vehicle driver assistant systems was outlined. Based on analysis of dynamics of main vehicle components, a seven-degree-of-freedom non-linear vehicle dynamics model was built for the simulator. Modeling process for vehicle model with Matlab/Simulink and Stateflow was depicted in detail. Simulation and road tests have been conducted to evaluate the vehicle model. It is shown that the vehicle model has small demand for computation resources and good accuracy in terms of both longitudinal and lateral dynamics.
Number of references:4
Ei main heading: Automobile parts and equipment
Ei controlled terms: Automobile drivers - Dynamics - Simulators - Vehicles
Uncontrolled terms: Driver assistant system - Real-time simulation - Vehicle models -Driver assistant systems - MATLAB/Simulink - Modeling processes - Vehicle dynamics models - Lateral dynamics - Computation resources - Vehicle components - Road tests - State flows - Vehicle dynamics
Ei classification codes: 432 Highway Transportation - 621 Nuclear Reactors - 654.1 Rockets and Missiles - 655.2 Satellites - 657.1 Solar Energy and Phenomena - 662.1 Automobiles - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671 Naval Architecture - 912.4 Personnel - 931.1 Mechanics
Database:Compendex
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5.Accession number:084611708473
Title:Analysis of the low-speed vehicle dynamics model considered frame flexibility
Authors:Zhao, Yanshui; Zhou, Kongkang; Li, Miao; Chen, Ke
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 15-19
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The low speed vehicle has been selected as prototype and analysis has been done with the theory of vehicle vibration, because in the condition of good roads and empty loads at the speed of about 40 km/h, this truck vibrated distinctly. Then three different kinds of vehicle vibrating models were established. According to the truck's road test and modal test, and the theory of vehicle vibration, the simulation of these three models was made, and the results were analyzed. It proved the results of simulation well agreed with the experiment. The frame should be considered as elastic. The frequency for the single particle rigid frame is 0-10 Hz and 10-20 Hz for the multi-particle elastic frame.
Number of references:9
Ei main heading: Automobile frames
Ei controlled terms: Automobile testing - Lattice vibrations - Modal analysis - Roads and streets - Trucks - Vehicles - Vibration analysis
Uncontrolled terms: Elastic beam - Modal test analysis - Simulation - Vehicle vibrations - Modal tests - Simulation wells - Frame flexibilities - Road tests - Rigid frames - Single particles - Low speed vehicles - Vehicle dynamics models
Ei classification codes:406.2 Roads and Streets - 432 Highway Transportation - 662 Automobiles and Smaller Vehicles - 662.4 Automobile and Smaller Vehicle Components - 663 Buses, Tractors and Trucks - 663.1 Heavy Duty Motor Vehicles - 663.2 Heavy Duty Motor Vehicle Components - 751.2 Acoustic Properties of Materials - 921 Mathematics - 933.1.1 Crystal Lattice - 943.2 Mechanical Variables Measurements
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6.Accession number:084611708475
Title:Model based on states preview for lane keeping system
Authors:Yang, Zhiqiang; Tan, Yu
Author affiliation:China Agricultural University, Beijing 100083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 25-29
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: To deal with the large offsets when the vehicle speed largely changes in lane keeping system, a vehicle lateral control model was designed based on states preview. Using the car-road deviation detected by monocular camera and the state variation after preview time, the car-road deviation model has been design at preview point. Simulation experiments and the real vehicle tests showed that by using the proposed model, lane keeping system could predict the preview of car-road deviation accurately, decrease preview model error. In general conditions, it could enable vehicles road offset control to maintain control within 10 cm. The algorithm could improve precision and accuracy of lane keeping control system, and improve the performance of follow the road centerline with the current model.
Number of references:13
Ei main heading: Control systems
Ei controlled terms: Roads and streets - Vehicles
Uncontrolled terms: Lane keeping system - Lateral dynamics model - Prediction model - Steering mechanism - Lane keepings - Monocular cameras - Vehicle speeds - Model errors - Real vehicles - Offset controls - Lane keeping controls - Simulation experiments - Current models - Vehicle lateral controls - Model-based
Ei classification codes:406.2 Roads and Streets - 432 Highway Transportation - 731.1 Control Systems
Database:Compendex
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7.Accession number:084611708479
Title:Experiment and analysis of the spray characteristics of biodiesel
Authors:Shi, Aiping; Ye, Lihua; Yuan, Yinnan; Jia, Weidong; Yan, Mingde
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 44-47
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: High-speed photography was used to study the macro spray characteristics of biodiesel, 0# diesel and the mixed fuel with different proportion of biodiesel. It showed that the spray angle got smaller with the proportion of biodiesel increased at the initial stage of injection. During the injection process, the spray angle of biodiesel and fossil diesel fuel had little differences. Penetration rate of fossil diesel fuel and biodiesel were growing larger till stable. With the time increasing, the penetration rate of biodiesel became larger than that of fossil diesel fuel. With the proportion of biodiesel increasing, the duration of injection became longer. Especially, when the percentage of biodiesel was over 50%, the fuel injection duration increased significantly.
Number of references:11
Ei main heading: Alternative fuels
Ei controlled terms: Biodiesel - Diesel fuels - Diesel ocomotives - Fuels - High speed cameras - High speed photography - Pesticides - Photography
Uncontrolled terms: Spray characteristics - Spray angles - Penetration rates - Speed photographies - Injection durations - Injection processes - Initial stages - Mixed fuels - Experiment and analyses
Ei classification codes:522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 612.2 Diesel Engines - 682.1.2 Locomotives - 742.1 Photography - 742.2 Photographic Equipment - 746 Imaging Techniques - 803 Chemical Agents and Basic Industrial Chemicals - 821.2 Agricultural Chemicals
Database:Compendex
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8.Accession number:084611708480
Title:Analysis of acoustical performance of multi-chamber Helmholtz resonators
Authors:Bi, Rong; Liu, Zhengshi; Wang, Hui; Wu, Hao; Liu, Huanjin
Author affiliation:Hefei University of Technology, Hefei 230009, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 48-51
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing,
100083, China
Abstract: Since the inner structure of multi-chamber Helmholtz resonator is complicated, acoustical performance could not be predicted by 1D plane wave theory. The 3D acoustical software has been used to simulate multi-chamber Helmholtz resonator which was combined in different ways. Then the influence of different combined structures on transmission loss of Helmholtz resonator was analyzed. The results showed that the parallel or serial structure of Helmholtz resonator could eliminate noise of several frequencies or increase transmission loss in one frequency. The combined series-parallel structure could increase its working frequency range and transmission loss.
Number of references:6
Ei main heading: Resonators
Ei controlled terms: Acoustic resonators - Acoustic variables control
Uncontrolled terms: Acoustical performance - Helmholtz resonator - Multi-chamber - Simulation - Helmholtz resonators - Acoustical performances - Transmission losses - Working frequencies - Parallel structures - One frequencies - Plane waves - Serial structures - Inner structures
Ei classification codes:714 Electronic Components and Tubes - 731.3 Specific Variables Control - 741.3 Optical Devices and Systems - 751.2 Acoustic Properties of Materials - 752.1 Acoustic Devices - 752.4 Acoustic Generators
Database:Compendex
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9.Accession number:084611708481
Title:Present research situation and perspective of drainage and irrigation machinery in China
Authors:Yuan, Shouqi; Wang, Xinkun
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 52-58
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The irrigation and drainage machinery play an important role in the irrigation, combat flood and drought, ensure agricultural steady high production and ecological environment construction, and it has broad market and the developing prospects. After more than 50 years development, China has made great progress in fundamental research, technical performance and scale in irrigation and drainage machinery, but mentioning about product security reliability, variety specification, performance quality, matching degree and post-sale service, China still has long way to go to improve them. The new technology, new materials, new craft research and application efforts in the field of drainage and irrigation machinery should be enhanced, and basic theoretical research should be strengthened, product performance should be improved and the reliability, systematization and advantage of equipment and technology should be perfect and enhanced so as to promote drainage and irrigation machinery development in the orientation of efficiency, multi-function, low energy consumption, environmental protection and intelligence.
Number of references:32
Ei main heading: Irrigation
Ei controlled terms: Drainage - Drought - Environmental protection - Machinery - Reliability
Uncontrolled terms: Development trend - Research progress - Technical performances - Research and applications - Fundamental researches - New crafts - New materials - New technologies - Sale services - Ecological environments - Matching degrees - Performance qualities - Low energy consumptions - Machinery developments - Product performances - Product securities
Ei classification codes:401 Bridges and Tunnels - 406 Highway Engineering - 421 Strength of Building Materials; Mechanical Properties - 442 Flood Control; Land Reclamation - 443.3 Precipitation - 444 Water Resources - 454.2 Environmental Impact and Protection - 502 Mines and Quarry Equipment and Operations - 601 Mechanical Design - 821.3 Agricultural Methods - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics
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10.Accession number:084611708482
Title:Structural design and rapid development platform of emitters under lower water pressure
Authors:Wei, Zhengying; Wen, Juying; Tang, Yiping; Lu, Bingheng
Author affiliation:Xi'an Jiaotong University, Xi'an 710049, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 59-64
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Aiming at the development trend of drip-irrigating study toward low energy consumption and low cost at present, CAD structural design of new anti-clogging emitters with lower water pressure was conducted by using CFD (computational fluid dynamics) numerical simulation on two-phase flow, and micro-PIV system was utilized to investigate the flow behaviors in various labyrinth channels. Based on rapid prototyping manufacturing (RP and M), a rapid development platform for new drip emitters with lower water pressure was established. Hydraulics performance and anti-clogging experimental analysis was performed in order to summarize formulas of structural parameters versus hydraulics performance by means of regression analysis. It would provide a theoretical base for new emitters with lower water pressure design.
Number of references:15
Ei main heading: Reconstruction (structural)
Ei controlled terms: Architectural design - Computational fluid dynamics - Concurrent engineering - Dynamics - Flow simulation - Fluid dynamics - Hydraulics - Irrigation - Job analysis - Liquids - Multiphase flow - Rapid prototyping - Regression analysis - Structural design - Two phase flow
Uncontrolled terms: CFD - Drip irrigation with lower water pressure - Emitter - PIV - Water pressures - Rapid developments - Flow behaviors - PIV systems - Low costs - Two-phase flows - Structural parameters - Experimental analyses - Numerical simulations - Drip emitters - Cfd (computational fluid dynamics) - Low energy consumptions - Development trends
Ei classification codes:402 Buildings and Towers - 405.2 Construction Methods - 408.1 Structural Design, General - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 632.1 Hydraulics - 723.5 Computer Applications - 821.3 Agricultural Methods - 912 Industrial Engineering and Management - 913.1 Production Engineering - 913.6 Product Development; Concurrent Engineering - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
Database:Compendex
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11.Accession number:084611708499
Title:Optimization on quantitative analysis models of free amino acids content in green tea by near infrared spectroscopy
Authors:Lin, Xin; Niu, Zhiyou; Ma, Aili; Liu, Hui
Author affiliation:Huazhong Agricultural University, Wuhan 430070, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 144-147 206
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: 158 samples of comminuted green tea were scanned by the near infrared spectroscopy analyzers. Using orthogonal experimental design, the calibration models of free amino acids content in green tea were gained with the correction methods of PCR, PLS and MPLS under different spectral data preprocessing methods separately. The models were evaluated by the objective function method. The optimal correction methods and spectral data preprocessing methods were determined, and the applicability of the models was validated. The experimental result is that using MPLS could get the optimal model. And its spectral data preprocessing method is SNV Detrend, 1, 1, 4, 4. Its objective function value is 94.25%; the relative standard deviation of validation is 6.39% (less than 10%). The results showed that using orthogonal experiment design could comprehensively evaluate the different correction methods and spectral data preprocessing methods on the models, and NIRS could achieve quantitative and fast detection of free amino acids content in green tea.
Number of references:13
Ei main heading: Infrared spectroscopy
Ei controlled terms: Amination - Amines - Amino acids - Experiments - Functions - Infrared devices - Infrared transmission - Near infrared spectroscopy - Optimization - Organic acids - Probability density function - Spectroscopic analysis - Spectrum analysisUncontrolled terms:Free amino acids content - Green tea - Quantitative analysis - Green teas - Free amino acids - Spectral datums - Correction methods - Objective functions - Orthogonal experiment designs - Relative standard deviations - Objective function values - Optimal models - Optimal corrections - Calibration models - Orthogonal experimental designs - Quantitative analysis models
Ei classification codes:461 Bioengineering and Biology - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 901.3 Engineering Research - 921 Mathematics - 921.5 Optimization Techniques - 922.1 Probability Theory - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
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12.Accession number:084611708500
Title:Improved research on intellectual system for measuring soil organic matter content with spectrum method
Authors:Li, Meiqing; Li, Jinyang
Author affiliation:Shandong Agricultural University, Taian 271018, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 148-151
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The principles and methods were introduced for measuring soil organic matter content with the aid of spectrum data diffusely reflected by the soil. The arrangement scheme, light system, hardware and software were carefully designed. In order to further decrease the measurement errors, on the basis of previous research, three other signals from different wavelengths of light were used-including the variation of "deviation of arch" for soil spectra at 600 nm. Different processing procedures of soil samples were used for analyzing the influence on precision of organic matter content. The results showed that the measuring precision between the measurements obtained by this system and by standard methods were remarkably improved and measuring errors were reduced from 7.69% to 3.76% obviously by including the variation of "deviation of arch" within the permissible range for practical use.
Number of references:18
Ei main heading: Soil surveys
Ei controlled terms: Arches - Biogeochemistry - Biological materials - Errors -Measurement errors - Organic compounds - Soils
Uncontrolled terms: Deviation of arch - Measuring precision - Organic matter content - Reflectance spectra characteristic - Soil organic matter contents - Measuring precisions - Organic matter contents - Processing procedures - Light systems - Practical uses - Measuring errors - Standard methods - Soil samples - Hardware and softwares - Spectrum methods - Intellectual systems
Ei classification codes:401.1 Bridges - 406.2 Roads and Streets - 408.2 Structural Members and Shapes - 461.2 Biological Materials and Tissue Engineering - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 731 Automatic Control Principles and Applications - 801.2 Biochemistry - 804.1 Organic Compounds - 921 Mathematics - 922 Statistical Methods - 922.2 Mathematical Statistics
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13.Accession number:084611708471
Title:Pressure control strategy based on road condition judgment for TCS
Authors:Yang, Cai; Song, Jian; Li, Hongzhi
Author affiliation:Tsinghua University, Beijing 100084, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 7-9
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: One pressure control strategy was presented for traction control system (TBS). Wheel speed sensor signals were used to judge road condition; different pressure control aims were suggested for different road conditions; target pressure was calculated and real pressure was estimated. The strategy was confirmed with vehicle experiment. The result showed that this pressure control strategy could greatly reduce the meaningless consumption of engine torque by the brake torque. The strategy could greatly reduce the fluctuation of pressure and the wheel speed fluctuation resulting from pressure fluctuation; it could also improve the vehicle starting ability up to 47%.
Number of references:5
Ei main heading: Control systems
Ei controlled terms: Flow of fluids - Pressure control - Roads and streets - Theorem proving - Traction (friction) - Wheels
Uncontrolled terms: Road condition judgment - TCS - Road conditions - Braketorques - Engine torques - Vehicle experiments - Pressure fluctuations - Wheel speeds - Wheel speed sensors - Traction control systems
Ei classification codes:406.2 Roads and Streets - 601.2 Machine Components - 631.1 Fluid Flow, General - 682.1.1 Railroad Cars - 682.1.2 Locomotives - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.4 Artificial Intelligence - 731.1 Control Systems - 731.3 Specific Variables Control - 921 Mathematics - 931.1 Mechanics
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14.Accession number:084611708489
Title:Numerical simulation and experiment on the seeds pickup performance of precision air-suction seeder
Authors:Li, Yaoming; Zhao, Zhan; Chen, Jin; Xu, Lizhang
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 95-99 104
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: According to the working principles of the air-suction precision seeder, the 3D model of seeds pickup process was established. Take the compressibility and the viscosity of the real gas into account, the NS equations and standard k-ε turbulence model were applied to calculate the forces on seeds in the gas field nearby the vacuum nozzle by using the computational fluid dynamics (CFD) software Fluent. The axial pickup distance, the radial pickup distance, the volume of effective pickup region and the seeds pickup tracks were received through the binary linear interpolation method. The effects of the diameter of nozzles and the differential pressure on the pickup performance were analyzed, the results showed that the pickup performance of conical nozzle was better than the straight nozzle and the bore hole and it would be improved with the increasing of nozzle diameter and the differential pressure. The rape seeds were selected as experimental material, the optimum parameters combined with conical nozzle of Φ1 mm, the roller's rotational speed of 14 r/min. and the differential pressure of 2 kPa were received through orthogonal tests. The parameters were tested to be the best with the seeds single pickup ratio of 92%, the seeds missing pickup ratio of 4% and the seeds multiple pickup ratio of 4%.
Number of references:12
Ei main heading: Pickups
Ei controlled terms: Agricultural products - Computational fluid dynamics - Computer simulation - Dynamics - Experiments - Fluid dynamics - Gas industry - Nozzles - Seed - Three dimensional - Turbulence models
Uncontrolled terms: CFD - Numerical simulation - Precision seeder - Differential pressures - Numerical simulations - Conical nozzles - Precision seeders - Ns equations - Linear interpolations - Real gasses - Software fluent - Orthogonal tests - Rotational speeds - Optimum parameters - Experimental materials - Pickup processes - Nozzle diameters - Bore holes - Gas fields - 3D models - Working principles
Ei classification codes:443.1 Atmospheric Properties - 522 Gas Fuels - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 723.5 Computer Applications - 752.2.1 Sound Recording Equipment - 752.3.1 Sound Reproduction Equipment - 821.4 Agricultural Products - 901.3 Engineering Research - 902.1 Engineering Graphics - 911.2 Industrial Economics - 921.6 Numerical Methods - 931.1 Mechanics
Database:Compendex
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15.Accession number:084611708491
Title:Color sorting algorithm based on color linear CCD
Authors:Wen, Qiang; Hu, Mingming; Sang, Nan
Author affiliation:Harbin Engineering University, Harbin 150001, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 105-108
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The image data were acquired by using PCI data acquisition card and the color linear CCD camera. And the sampled data have been stored in text files as a data source for the followed study of color-based sorting algorithm. To reduce the disturbance, we attempted to get smooth signals by wavelet filtering method. According to the relevant theory of digital image processing feature extraction and actual image data characteristics, the K-means clustering analysis was applied to sort the image data into three categories: the background category, normal rice category and the bad rice category. A new method of rice color-sorting algorithm was realized based on color linear CCD, and this method is independent of any human experience.
Number of references:6
Ei main heading: Sorting
Ei controlled terms: Cameras - Charge coupled devices - Cluster analysis - Color - Data acquisition - Digital cameras - Feature extraction - Flow of solids - Grain (agricultural product) - Image processing - Interfaces (computer) - Optical properties - Water supply systems
Uncontrolled terms: K-means clustering - Linear CCD - Rice color-sorting - Wavelet filtering - Linear ccds - Image datums - Sorting algorithms - Digital image processing - Filtering methods - Text files - Sampled datums - Color sorting
Ei classification codes:446.1 Water Supply Systems - 714.2 Semiconductor Devices and Integrated Circuits - 716 Telecommunication; Radar, Radio and Television - 722.2 Computer Peripheral Equipment - 723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.2 Photographic Equipment - 751.1 Acoustic Waves - 821.4 Agricultural Products - 922 Statistical Methods - 931.1 Mechanics
Database:Compendex
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16.Accession number:084611708492
Title:Application of fuzzy immune PID control in starch production line
Authors:Shen, Gang; Cong, Dacheng; Han, Junwei
Author affiliation:Harbin Institute of Technology, Harbin 150001, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 109-112 118
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Fuzzy immune PID was used to adjust the liquid-level of the starch production line based on the analysis and comparison of the principle of tradition PID, Smith prediction PID and fuzzy immune PID and a mathematical model about one of liquid-level loop of starch production line was built, then these three controllers were designed and simulated. The simulation results showed that the fuzzy immune PID is better than tradition PID in respect of control effect and its robustness is higher than Smith prediction PID. In the end, DDE protocol and ActiveX of Matlab were adopted to realize data exchange with RSView32 of the starch production line and transmit accurately the algorithm of fuzzy immune PID to RSView32.
Number of references:13
Ei main heading: Proportional control systems
Ei controlled terms: Control theory - Forecasting - Fuzzy control - MATLAB - Starch - Three term control systems - Time varying control systems - Two term control systems
Uncontrolled terms: Fuzzy immune PID control - RSView32 - Smith prediction PID - Starch production line - Fuzzy immune PID - Starch productions - Activex - Simulation results - Algorithm of fuzzy - Data exchanges
Ei classification codes:723.1.1 Computer Programming Languages - 723.4 Artificial Intelligence - 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 822.3 Food Products - 912.2 Management - 921 Mathematics - 922.2 Mathematical Statistics
Database:Compendex
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17.Accession number:084611708513
Title:Simulation aluminum alloy auto panel optimization forming based on the grey system theory
Authors:Zhao, Maoyu; Xue, Kemin; Li, Ping
Author affiliation:Hefei University of Technology, Hefei 230009, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 207-210 217
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The aluminum alloy auto panel strength beam was numerical simulated by FEM software while press force, the depth, die radius, punch radius of draw bead were independent variables, the data about the crack, winkle and the thinning were acquired by an orthogonal experiment. Then the grey relational generating between forming process and the single objective function, the grey rational grade of multi-objective were calculated by the grey theory system, thus the multi-objective design was changed into the single-objective design. Furthermore the average grey relational grade of the forming process was analyzed. Employing the optimization data, the auto panel forming was numerically simulated. The conclusion demonstrated that the sheet forming quality is obviously increased by the optimized forming process parameters.
Number of references:9
Ei main heading: Alloys
Ei controlled terms: Alumina - Aluminum alloys - Aluminum metallurgy - Aluminum - Cybernetics - Light metals - Multiobjective optimization - Optimization - Process engineering - System theory
Uncontrolled terms: Auto panel - Draw bead - Grey systemtheory-Numericalsimulation - Forming processes - Draw beads - Grey system theories - Single objectives - Orthogonal experiments - Die radiuses - Sheet forming - Independent variables - Grey relational grades - Grey theories - Punch radiuses - FEM softwares
Ei classification codes:461.1 Biomedical Engineering - 461.9 Biology - 531.1 Metallurgy - 541.1 Aluminum - 541.2 Aluminum Alloys - 542.1 Beryllium and Alloys - 542.2 Magnesium and Alloys - 542.3 Titanium and Alloys - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.4 System Stability - 804.2 Inorganic Compounds - 812.1 Ceramics - 912.3 Operations Research - 913.1 Production Engineering - 921.5 Optimization Techniques - 961 Systems Science
Database:Compendex
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18.Accession number:084611708476
Title:Measurement system for vehicle motion state based on SIMS/GPS integrated technologies
Authors:Zhang, Xiaolong; Feng, Nenglian; Song, Jian; Wang, Jixian
Author affiliation:Tsinghua University, Beijing 100084, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 30-35
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The strapdown inertial measurement algorithm was firstly derived on the basis of the set coordinate systems. Secondly, both the state and the measure equations of errors were established based on the indirect feedback and non-tight integrated position/velocity/course angle measuring model between the middle-and-low precision IMU (inertial measurement unit) and the high precision CP-DGPS (carrier-phase-differential GPS). Then the improved self-adapting Kalman filter was employed to simulate the measurement model. Finally, the measurement system was developed for the model certification and the roadway tests were conducted. The comparative study on the simulation and the roadway tests showed that the simulation results are in good agreement with the experimental result, which further justified the effectiveness of the developed integrated system for the vehicle active safety roadway test.
Number of references:7
Ei main heading: Electronic equipment testing
Ei controlled terms: Control theory - Equations of motion - Feedback - Inertial navigation systems - Integrated optics - Kalman filters - Measurement errors - State feedback - Testing - Wave filters
Uncontrolled terms: Path and attitude - Roadway test - SIMS/GPS integrated measurement - Measurement systems - Integrated technologies - Differential gps - Self-adapting - Measurement models - High precisions - Coordinate systems - Integrated Systems - Simulation results - Inertial Measurement units - Active safeties - Comparative studies - Angle measuring - Inertial measurements - Vehicle motions
Ei classification codes:422.2 Test Methods - 423.2 Test Methods - 431.5 Air Navigation and Traffic Control - 703.2 Electric Filters - 715 Electronic Equipment, General Purpose and Industrial - 716.1 Information Theory and Signal Processing - 731.1 Control Systems - 741.3 Optical Devices and Systems - 921.2 Calculus - 922 Statistical Methods - 931.1 Mechanics
Database:Compendex
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19.Accession number:084611708477
Title:Control strategy of fuel cell-battery-ultracapacitor hybrid electric vehicle
Authors:Chen, Jing; Wang, Dengfeng; Liu, Binna
Author affiliation:Jilin University, Changchun 130025, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 36-39 19
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The control strategy of the fuel cell-battery-ultracapacitor hybrid electric vehicle's energy system was established. Based on a domestic economy car configuration, the simulation analysis about a refitted fuel cell hybrid electric vehicle was performed using ADVISOR software. The simulation results indicate that using battery and ultracapacitor as the assisted energy system of fuel cell hybrid electric vehicle is feasible and the advantage of it is distinct.
Number of references:5
Ei main heading: Electric vehicles
Ei controlled terms: Automobiles - Capacitors - Cells - Cytology - Electric automobiles - Electric batteries - Electrochemistry - Fuel cells - Fuel economy - Fuels - Land vehicle propulsion - Secondary batteries - Solid oxide fuel cells (SOFC) - Vehicles
Uncontrolled terms: Control strategy - Hybrid electric vehicle - Simulation - Ultracapacitor - Control strategies - Hybrid Electric Vehicles - Fuel cell hybrid electric vehicles - Energy systems - Simulation results - Advisor softwares - Simulation analysis - Economy cars
Ei classification codes:432 Highway Transportation - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 521 Fuel Combustion and Flame Research - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 525.2 Energy Conservation - 661.1 Automotive Engines - 662.1 Automobiles - 662.2 Smaller Vehicles - 682.1.2 Locomotives - 702.1 Electric Batteries - 702.1.2 Secondary Batteries - 702.2 Fuel Cells - 704.1 Electric Components - 801.4.1 Electrochemistry
Database:Compendex
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20.Accession number:084611708478
Title:Experiment on characteristics of driving force and transmission efficiency of electric tractor
Authors:Gao, Huisong; Wang, Shanshan; Zhu, Sihong
Author affiliation:Nanjing Agricultural University, Nanjing 210031, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 40-43 58
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: An experimental study on characteristics of driving force and transmission efficiency of electric tractor was carried out. Based on the theoretical analysis about characteristics of driving force and transmission efficiency of electric tractor, the generation equation of driving force, the calculation equation of transmission efficiency and motor controller efficiency were built up considering the whole tractor. The experimental study was carried out by using the method of indoor simulation experiment. The experimental results showed that the characteristic curves of driving force are down concave, and are more suitable for dynamic performance of the tractor; the characteristic curve of driving force of different shifts is suitable for different working conditions; the transmission efficiency of electric tractor have greater difference when the electric tractor working on different shifts, and the electric tractor has the best economy when it is working on the VI shift because the wide range of efficient velocity; the motor controller has little effect on transmission efficiency of electric tractor for its high efficiency.
Number of references:5
Ei main heading: Tractors (agricultural)
Ei controlled terms: Electric network analysis - Experiments - Mechanisms-Motors-Tractors (truck)
Uncontrolled terms: Driving force - Electric tractor - Transmission efficiency - Electric tractors - Transmission efficiencies - Driving forces - Motor controllers - Characteristic curves - Experimental studies - Working conditions - Dynamic performances - High efficiencies - Indoor simulations - Theoretical analyses
Ei classification codes:601.3 Mechanisms - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 663.1 Heavy Duty Motor Vehicles - 703.1.1 Electric Network Analysis - 705.3 Electric Motors - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research
Database:Compendex
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21.Accession number:084611708483
Title:3D design method of double-channel impeller of sewage pump
Authors:Zhang, Jing; Qi, Xueyi; Ji, Hong; Yang, Guolai; Hou, Yihua
Author affiliation:Lanzhou University of Technology, Lanzhou 730050, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 65-70
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Problem of disagreement between 2D drawing and actual wood former of double-channel impeller of sewage pump most possibly encountered if the design is from traditional 2D manner. Research was carried out for the method of 3D design directly in Pro/ENGINEER, so 2D drawing could be produced by projecting through 3D impeller designed. The procedure could secure the agreement between 2D drawing and actual wood former. A practical design exemplified the correctness of the method by experiment. Additionally, a formula was deuced, which showed the relation between the outlet angle of center line of channel and wrap angle, variant coefficient, if archimedes spiral was assumed as the curve of center line of plate plane. It was the basis to control outlet angle of channel. Another formula was presented for the calculation of normal distance from points on the passage center line to outer diameter and formula of cross-section area as outlet point was also available. Based on them, a new method was developed for fin, ding out the outlet point.
Number of references:8
Ei main heading: Design
Ei controlled terms: Pumps - Sewage pumps - Sewage
Uncontrolled terms: 3D design - Double channel - Outlet angle - Pro/ENGINEER - Wrap angle
Ei classification codes:408 Structural Design - 452.1 Sewage - 453.1 Water Pollution Sources - 618.2 Pumps - 902.1 Engineering Graphics
Database:Compendex
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22.Accession number:084611708484
Title:Research on internal flow of multi-nozzle Pelton turbines
Authors:Fu, Jie; Song, Wenwu; Zhou, Min; Yang, Zuowei; Yao, Wen'ge
Author affiliation:Xihua University, Chengdu 610039, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 71-75
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: In order to increase the output and specific speed of Pelton turbines, the method of increasing nozzle number is usually adopted. However, the increasing nozzle will lead to mutual interference of internal flows of the runner, which reduces the efficiency of Pelton turbines. By using CFD technique, the internal flow of Pelton turbines runner with six nozzles was numerically simulated. Through the calculation results of mutual flow between bucket number and nozzle number, we found that 21 buckets for runner in Pelton turbines with six nozzles was matching with the nozzle number. The velocity and pressure distribution and current path line of single bucket during the whole jet accepting process have been obtained. The interference of internal flow of the runner during the multi-nozzle acting at the same time has been obtained as well. All these provided references for the practical operation of hydropower station.
Number of references:9
Ei main heading: Nozzles
Ei controlled terms: Atomizers - Electric generators - Engines - Hydraulic machinery - Hydraulic motors - Turbines
Uncontrolled terms: Bucket - Multi-nozzle - Numerical simulation - Pelton turbine - Pelton turbines - Internal flows - Cfd techniques - Current paths - Mutual interferences - Hydropower stations - Specific speeds
Ei classification codes:612 Engines - 612.3 Gas Turbines and Engines - 617.1 Hydraulic Turbines - 617.2 Steam Turbines - 617.3 Steam Engines - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 632.2 Hydraulic Equipment and Machinery - 654.2 Rocket Engines - 705.2 Electric Generators - 802.1 Chemical Plants and Equipment
Database:Compendex
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23.Accession number:084611708485
Title:Experiment on rotary disc nozzle with impeller
Authors:Zhou, Haiyan; Yang, Xuejun; Yan, Herong; Xu, Saizhang
Author affiliation:Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 76-79
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on multi-variable quadratic regression orthogonal combined experiments, the regression equation for rotation-speed of impeller and diameter of impellers, vane number, vane fixed angle was established, and the equation for rotation-speed of impellers and spraying volume was also built. Both equations laid an important basis for impellers designing. Optimal structure parameters of impellers for the experimental sprayer have been obtained, diameter of impellers is 150 mm; six pieces of vanes; vane fixed angle is 30°. The experimental results of rotary disc nozzle with optimal structure parameters: VMD of droplets is 100-150 μm, with spraying volume changed from 0 L/min to 10 L/min under the rated rotation-speed.
Number of references:9
Ei main heading: Blowers
Ei controlled terms: Experiments - Impellers - Mechanisms - Nozzles - Pesticides - Rotation - Speed
Uncontrolled terms: Rotary disc nozzle with impeller - Structure parameters - Rotary discs - Fixed angles - Optimal structures - Regression equations - Vane numbers - Quadratic regressions
Ei classification codes:601.1 Mechanical Devices - 601.2 Machine Components - 601.3 Mechanisms - 618.3 Blowers and Fans - 631.1 Fluid Flow, General - 803 Chemical Agents and Basic Industrial Chemicals - 821.2 Agricultural Chemicals - 901.3 Engineering Research - 931.1 Mechanics
Database:Compendex
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24.Accession number:084611708486
Title:Experiment of twin-fluid charged spray by PDA
Authors:Wang, Zhentao; Cen, Qigang; Song, Xiaoning; Luo, Tiqian
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 80-84
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The electrostatic charged spray could reduce the viscosity resistance and enhance the atomization effect. After the droplets come into being, the electric field can minish the droplets surface tension and make the droplets produce the second atomization, and further the droplets become much smaller and the uniformity of droplets diameter is improved. With the air and water as working fluids, the experimental research of twin-fluid charged spray nozzle designed by oneself was studied. The droplets diameter, the axial jet velocity and turbulent fluctuation intensity under the different charged voltages and gas-liquid ratio were obtained. The measure of two phases flow velocity and turbulent fluctuation intensity were determined. The influence of charged voltage and droplets diameter, axial jet velocity, turbulent fluctuation intensity were discussed.
Number of references:12
Ei main heading: Drops
Ei controlled terms: Air - Atomization - Drop formation - Electric fields- Electrostatics - Hand held computers - Hydraulics - Jets - Nozzles - Personal digital assistants - Pesticides - Surface chemistry - Surface tension - Turbulence - Velocity
Uncontrolled terms: Charged voltage - Droplets diameter - Droplets velocity - PDA- Turbulent fluctuation intensity
Ei classification codes:443.1 Atmospheric Properties - 443.2 Meteorological Instrumentation - 631.1 Fluid Flow, General - 632.1 Hydraulics - 701.1 Electricity: Basic Concepts and Phenomena - 722 Computer Systems and Equipment - 722.4 Digital Computers and Systems - 801.4 Physical Chemistry - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 821.2 Agricultural Chemicals - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 932.3 Plasma Physics
Database:Compendex
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25.Accession number:084611708493
Title:Kinetic models of oil extraction for soybean extruding-expelling masses
Authors:Xu, Honghua; Shen, Dechao; Li, Tiejing; Zuo, Feng
Author affiliation:Northeast Agricultural University, Harbin 150030, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 113-118
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A mathematical model was developed to quantitatively analyze the rate of soybean oil extraction at varying extrusion parameters including material moisture, expanding temperature, the die length, the length of section δ and the rotate speed of screw. Kinetic parameters were estimated and correlated with the oil concentration of extrusion soybean products at different extraction time. The kinetic model identified microstructure development upon varying extrusion conditions. By analyzing characteristics of soybean fat globules for different extrusion masses, it showed that positive correlation between the size of fat globules and the diffusivity index. To enhance oil availability and extractability, the quantity models were developed to describe the relations of varying extrusion parameters and extraction time when the ratio of residual oil of soybean meals was 1%, it was used to obtain optimal extraction time for different extrusion conditions. Observed experimental oil extraction data fitted well with the developed soybean mathematical models.
Number of references:12
Ei main heading: Mathematical models
Ei controlled terms: Concentration (process) - Dispersions - Extrusion - Forming - Functions - Kinetic theory - Mathematical techniques - Oil well production
Uncontrolled terms: Extruding-expelling - Oil extraction - Residual oil rate - Soybean - Extraction times - Oil extractions - Extrusion parameters - Fat globules - Kinetic models - Residual oils - Extrusion conditions - Soybean products - Oil concentrations - Extractability - Positive correlations - Soybean meals - Rotate speeds - Microstructure developments - Soybean oils
Ei classification codes:511.1 Oil Field Production Operations - 535.2 Metal Forming - 535.2.2 Metal Forming Practice - 801.3 Colloid Chemistry - 802.3 Chemical Operations - 816.1 Processing of Plastics and Other Polymers - 921 Mathematics - 931.1 Mechanics - 951 Materials Science
Database:Compendex
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26.Accession number:084611708494
Title:Technology optimization on making biodiesel from the seed oil of Acer truncatum
Authors:Wei, Qin; Ma, Xihan; Mao, Hong
Author affiliation:Northwest A and F University, Yangling 712100, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 119-123 94
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A novel biodiesel was prepared by a two-step technology from the seed oil of Acer truncatum Bunge, a woody oil-bearing plant. Technological conditions of the esterification were investigated, and the composition of the product was analyzed by gas chromatography (GC). The technological parameters to reduce the acidity of the oil in the first step were as follows: the ratio of methanol to the oil was 6, amount of concentrated sulfuric acid as catalyst 0.6%, reaction temperature 50°C, and reaction time 90 min. In the second step however, the ratio of methanol to oil was 6, the amount of potassium hydroxide as catalyst 0.9%, reaction temperature 60°C, and reaction time 50 min. The conversion rate of seed oil of Acer truncatum was over 99%. The results of GC analysis showed that in biodiesel obtaining, the methyl esters of fatty acid with 18-20 carbon chains accounted for 91.54%, including 37.03% of methyl oleate, 41.37% of methyl linoleate.
Number of references:12
Ei main heading: Crude petroleum
Ei controlled terms: Acids - Agricultural products - Biodiesel - Catalysis - Chemical analysis - Chromatographic analysis - Esterification - Esters - Fatty acids - Gas chromatography - Methanol - Oils and fats - Optimization - Organic compounds - Potassium hydroxide - Potassium - Psychophysiology - Rate constants - Seed - Sulfuric acid
Uncontrolled terms: Seed oil of Acer truncatum - Technology optimization - Seed oils - Reaction times - Reaction temperatures - Technology optimizations - Methyl linoleates - Carbon chains - Methyl esters - Acer truncatum Bunge - Methyl oleates - Conversion rates - Technological parameters - Technological conditions
Ei classification codes:461.4 Ergonomics and Human Factors Engineering - 512.1 Petroleum Deposits - 523 Liquid Fuels - 549.1 Alkali Metals - 801 Chemistry - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 822.2 Food Processing Operations - 822.3 Food Products - 921.5 Optimization Techniques
Database:Compendex
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27.Accession number:084611708495
Title:Position recognition method of Japan Euonymus plantlets in bottle based on machine vision
Authors:Yang, Li; Zhang, Kailiang; Zhang, Tiezhong
Author affiliation:China Agricultural University, Beijing 100083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 124-128
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A new method to identify the position of Japan Euonymus plantlets in bottle from the bottle bottom was proposed according to the appearance of plantlets in bottle. The experimental data of 200 plantlets showed that the method is feasible, for the distance between stalk and root is 1.5 mm in 97% plantlets. A set of image acquisition system for bottle bottom has been established, and the algorithm to extract the root image from the bottle bottom image, tag the area and calculate the center of each root was developed. Detecting experiments were carried out by identifying images of 240 plantlets and measuring the distances between calculated root centers and actual stalk centers. The results indicated that the detecting accuracy of root amount is 92.05% and the average distances between calculated root centers and actual stalk centers are 0.85 mm. It can meet the requirement of transplanting process.
Number of references:11
Ei main heading: Bottles
Ei controlled terms: Computer vision - Image acquisition - Tissue culture
Uncontrolled terms: Machine vision - Position - Recognition method - Plantlets - Image acquisition systems - Experimental datums - Averagedistances - On machines - Position recognitions
Ei classification codes:461.2 Biological Materials and Tissue Engineering - 694.2 Packaging Materials - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 731.6 Robot Applications - 741.2 Vision - 801.2 Biochemistry
Database:Compendex
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28.Accession number:084611708501
Title:Parts-selection method of mechanical products based on customer customization
Authors:Hu, Jing; Liu, Mingzhou; Ge, Maogen; Zhang, Mingxin; Wu, Junfeng
Author affiliation:Hefei University of Technology, Hefei 230009, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 152-157 163
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The parts-selection model of mechanical products for MC strategy was presented. The model integrated the relational diagram model and the hierarchical assembly model of product. Some data objects such as interfaces, rules and constraints have been introduced into the model. Using this model, the knowledge, relations and experiences of the product could be expressed conveniently, and the parts could be selected initially. An uncertain multiple attribute decision making method based on CWGA operator and maximizing deviation method was presented to optimize the parts selection. A case study was also presented to illuminate the proposed method.
Number of references:10
Ei main heading: Machinery
Ei controlled terms: Aircraft instruments - Avionics - Problem solving - Uncertain systems
Uncontrolled terms: Customer customization - Mechanical products - Parts selection model - Uncertain multiple attribute decision making method - Selection models - Uncertain multiple attribute decision makings - Case studies - Hierarchical assemblies - AS interfaces - Data objects - Selection methods
Ei classification codes:601 Mechanical Design - 652.3 Aircraft Instruments and Equipment - 715 Electronic Equipment, General Purpose and Industrial - 723.4 Artificial Intelligence - 731.1 Control Systems - 921 Mathematics - 961 Systems Science
Database:Compendex
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29.Accession number:084611708502
Title:Improved particle swarm optimization for forward positional analysis of symmetrical stewart parallel manipulators
Authors:Che, Linxian; He, Bing; Yi, Jian; Chen, Changyi; Luo, Youxin
Author affiliation:Luzhou Vocational and Technical College, Luzhou 646005, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 158-163
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The unconstrained optimization model for the forward positional analysis of a 6DOF symmetrical Stewart parallel manipulator, which based on the constrained length of the bars, was presented. The standard particle swarm optimization (SPSO) has some demerits, such as relapsing into local extremum and slow convergence velocity in the late evolutionary. The improved PSO, adaptive mutation PSO (AMPSO), based on the new difference index, were proposed to overcome the demerits of the SPSO. Aimed at all forward positional solutions of parallel mechanisms were hard to obtain, stochastic algorithms were used to solve these solutions. Directed towards this weakness, the hierarchical search adaptive mutation PSO (HSAMPSO) was adopted to make the optimal problem for forward positional analysis of parallel mechanisms. Numerical results for the forward position analysis of the symmetrical Stewart parallel manipulator showed that the HSAMPSO could solve all assembly configurations, and possess the performances of rather quick convergence speed and high precision.
Number of references:14
Ei main heading: Particle swarm optimization (PSO)
Ei controlled terms: Constrained optimization - Convergence of numerical methods-Manipulators - Mechanisms - Optical filters - Optimization - Parallel algorithms - Topology
Uncontrolled terms: Adaptive mutation - Forward positional analysis -Hierarchical\search- Particle swarm optimization - Stewart parallel manipulator
Ei classification codes:601.3 Mechanisms - 691.1 Materials Handling Equipment - 703.1 Electric Networks - 717.2 Optical Communication Equipment - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 731.5 Robotics - 741.3 Optical Devices and Systems - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.5 Optimization Techniques - 921.6 Numerical Methods - 961 Systems Science
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30.Accession number:084611708503
Title:Bilateral control strategy of master-slave manipulators with force tele-presence
Authors:Zhang, Zhuxin; Zhao, Dingxuan; Chen, Tiehua
Author affiliation:Changchun Institute of Technology, Changchun 130012, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 164-168
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A hydraulic servo master-slave robot was designed and force bilateral servo control algorithm was studied. Because of the features of the common symmetry servo valve, the master manipulator can not drive the actors directly and pressure information of the master manipulator is needed to drive the actors through the controller. This process greatly affects the response speed of the control system. The force differential signal of the master and slave was used to control the slave manipulator and the position differential signal of the slave and the master was used to drive the master manipulator. This new control strategy improved the response speed of the master-slave control system. The slave's interference situation could be decided based on how the master followed the slave. Additionally, the new control strategy changed the common control mode that the slave followed the master, and the master felt the slave's force.
Number of references:9
Ei main heading: Control systems
Ei controlled terms: Broadband networks - Elastic moduli - Force control - Hydraulicservomechanisms - Hydraulics - Manipulators - Neural networks - Pneumatic control equipment - Robotics
Uncontrolled terms: Bilateral control strategy - Electro -hydraulic servo system - Force feedback manipulator - Force tele-presence - Master manipulators - Force tele presences - Control strategies - Response speeds - Bilateral control strategies - Differential signals - Slave manipulators - Control modes - Interference situations - Servo valves - Bilateral servo controls - Slave robots
Ei classification codes:421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 461.1 Biomedical Engineering - 632.1 Hydraulics - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 691.1 Materials Handling Equipment - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723.4 Artificial Intelligence - 731.1 Control Systems - 731.3 Specific Variables Control - 731.5 Robotics - 732.1 Control Equipment - 951 Materials Science
Database:Compendex
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31.Accession number:084611708487
Title:Analysis of volute strength of standard pump based on ANSYS
Authors:Wang, Yang; Liu, Zhe
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 85-89
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The thickness of the S50160/75 standard pump volute calculated by the traditional formula was amended to solve the volute wall of the domestic standard pump. The pressure distributions in the volute along the flowing were simulated by using Fluent software, and the trends were from rising to declining to rising again in low flux condition and rising gradually in rated condition. The stresses and strains have been calculated approximately in different conditions with ANSYS software, it concluded that the throat section and the largest ring of the axial region are the most easily damaged and the most dangerous parts. Strength check on the volute and finite element analysis showed that the amended thickness of the volute met the strength requirements. And the hydraulic performance tests of the pump proved that the calculated results are consistent with the actual results.
Number of references:11
Ei main heading: Pumps
Ei controlled terms: Centrifugal pumps - Computer software - Elasticity - Finiteelement method - Hydraulic machinery - Standards - Structural design - Theorem proving
Uncontrolled terms: Finite element analysis - Numerical simulation - Strength - Volute - ANSYS softwares - Domestic standards - Rated conditions - Throat sections - Low fluxes - Hydraulic performances - Axial regions - FLUENT softwares - Traditional formulas
Ei classification codes:408.1 Structural Design, General - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 618.2 Pumps - 632.2 Hydraulic Equipment and Machinery - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 902.2 Codes and Standards - 921 Mathematics - 921.6 Numerical Methods - 931.1 Mechanics
Database:Compendex
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32.Accession number:084611708488
Title:Experiment on dispensing performance of air-sweeping inclined plate seed-metering device
Authors:Li, Chenghua; Gao, Yuzhi; Zhang, Benhua
Author affiliation:Shenyang Ligong University, Shenyang 110168, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 90-94
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Applying quadrate regression experiment with general rotary design method, mathematical models that described relation of seed dispensing criteria and influence factors of the metering device were established, and the impacting tendency and regularity of influence factor on seed dispensing criteria were analyzed. Experimental results showed that higher single seed index with lower multi-seed and missing seed index could be achieved for Jingfeng cabbage seed when cell diameter and sell depth of metering disc were 2-3.5 mm and 2.2-3.6 mm respectively, and air current amount was 0.4-0.55 m3/h. With the maximum single seed index as goal and the minimum multi-seed and missing seed index as constrains optimal parameters of the disc cell was determined as diameter is 2.4-3.5 mm, depth 2.8-3.4 mm, and air current amount 0.46-0.55 m3/h.
Number of references:8
Ei main heading: Seed
Ei controlled terms: Agricultural products - Experiments - Mathematical models
Uncontrolled terms: Dispensing performance - Influence factor - Mathematic model - Metering device - Metering devices - Influence factors - Air currents - Rotary designs - Optimal parameters - Cell diameters - Inclined plates
Ei classification codes:821.4 Agricultural Products - 901.3 Engineering Research - 921 Mathematics
Database:Compendex
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33.Accession number:084611708506
Title:Open and monitoring CNC system based on bus and network technology
Authors:Xu, Yue; Wang, Taiyong; Zhao, Yanju; Dong, Jingchuan
Author affiliation:Tianjin University, Tianjin 300072, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 178-182
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A monitor CNC system based on tow-layer-network was designed. Its controller was based on PC structure, and Windows 2000 operating-system was used, and whose real-time weakness has been solved by RTX. The problems of bad real-time and reliability which were caused by condensed information exchange have been solved by using Profibus-DP and SERCOS bus. Fault monitoring and diagnosis technologies were contact with CNC system designation and a layer-monitoring architecture has been created in prototype machine. Heuristic working in CNC system's network has been done.
Number of references:7
Ei main heading: Windows operating system
Ei controlled terms: Buses
Uncontrolled terms: CNC system - Layering - SERCOS bus - CNC systems - SERCOS buses - Monitoring architectures - Fault monitoring - PC structures - Profibus - Information exchanges - Prototype machines - Windows 2000 - Network technologies
Ei classification codes:663.1 Heavy Duty Motor Vehicles - 723 Computer Software, Data Handling and Applications
Database:Compendex
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34.Accession number:084611708504
Title:Large eddy simulation of the 3-D transient flow field in hydrodynamic coupling and characteristics prediction
Authors:Chu, Yaxu; Liu, Chunbao; Ma, Wenxing
Author affiliation:Beihua University, Jilin 132021, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 169-173
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The transient control equations of 3-D flow in hydrodynamic coupling were coupled calculated by using the methods of large eddy simulation (LES), flow control equation coupled solution, and sliding mesh method for multi-flow regions in CFD software. In order to learn the flow laws of flow field deeply and optimize the structure, the numerical solution of the 3-D flow field has been analyzed. The torque in each impeller of hydrodynamic coupling was figured out based on the numerical solution of the 3-D flow field. Then the characteristic of hydrodynamic coupling was predicted. The prediction characteristic has been compared with the experimental result; it is found that the error between them is less than 7%, which could prove the effectiveness of the numerical simulation method and characteristic prediction. Then the conclusion has been drawn that the numerical simulation method for the flow field of hydrodynamic coupling has applicable value in engineering.
Number of references:4
Ei main heading: Flow simulation
Ei controlled terms: Computer simulation - Concurrency control - Flow fields - Flowof fluids - Fluid dynamics - Forecasting - Hydrodynamics - Large eddy simulation - Systems engineering
Uncontrolled terms: Characteristic prediction - Hydrodynamic coupling -Hydrodynamic couplings - Numerical solutions - Numerical simulation methods - Control equations - Large eddies - Flow laws - CFD softwares - Large-eddy simulations - Flow regions - Sliding mesh methods - Coupled solutions - Transient flow fields
Ei classification codes:631 Fluid Flow - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.2 Hydrodynamics - 723.3 Database Systems - 723.5 Computer Applications - 731.3 Specific Variables Control - 912 Industrial Engineering and Management - 912.2 Management - 921 Mathematics - 922.2 Mathematical Statistics - 931.1 Mechanics - 961 Systems Science
Database:Compendex
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35.Accession number:084611708505
Title:Modeling and characteristics of hydraulic lines of EHPS
Authors:Shi, Peiji; Shi, Guobiao; Lin, Yi; Zhao, Wanzhong
Author affiliation:Beijing Institute of Technology, Beijing 100081, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 174-177
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The mathematical model of hydraulic of electro-hydraulic power steering system (EHPS) line was established by using bode graph theory and the state space equation was attained. Dynamic fluid friction of the line has been considered when modeling so the simulation results more agreed with reality. A simulation was carried out to analyze how the fluid resistance, induction and capacity impacted the work performance of the hydraulic line. The result is that, increase the fluid resistance and induce or decrease the fluid capacity could all boost up the stability.
Number of references:7
Ei main heading: Hydraulics
Ei controlled terms: Elastic moduli - Equations of state - Flow simulation - Fluid dynamics - Friction - Graph theory - Laminar flow - Topology
Uncontrolled terms: Bode graphs - Dynamic friction - Electro-hydraulic power steering system - Simulation - Fluid resistances - Hydraulic power steering systems - Hydraulic lines - Simulation results - Dynamic fluids - State Space equations - Work performances
Ei classification codes:421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 631.1 Fluid Flow, General - 632.1 Hydraulics - 703.1 Electric Networks - 723.5 Computer Applications - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Database:Compendex
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36.Accession number:084611708496
Title:Different genetic algorithms parameter effect for searching optimal solution of optimization irrigation model
Authors:Zhang, Bing; Yuan, Shouqi; Zhang, Jiansheng; Sun, Jun; Li, Hong; Huang, Wensheng
Author affiliation:Changzhou Institute of Technology, Changzhou 213002, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 129-133
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: By conducting the research on different genetic algorithms parameter effect for searching optimal solution of optimization irrigation model, a group of most optimal genetic operator parameters were obtained. Result showed that the searching efficiency is the highest under initial population n=20, crossover rate pc=0.5 and mutation rate pm=0.01. At the same time, using this group of optimal combination of parameters, the optimal solution has been gained after searching optimal solution under five different irrigation volumes.
Number of references:13
Ei main heading: Optimal systems
Ei controlled terms:Algorithms - Genetic algorithms - Irrigation - Mathematical operators - Optimization - Population statistics - Spatial variables measurement
Uncontrolled terms:Crossover rate - Mutation rate - Optimal solution - Searching optimal solutions - Parameter effects - Optimal solutions - Mutation rates - Crossover rates - Searching efficiencies - Genetic operators - Optimal combinations - Initial populations
Ei classification codes:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 821.3 Agricultural Methods - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements - 961 Systems Science
Database:Compendex
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37.Accession number:084611708497
Title:Calculation of sprinkler irrigation uniformity by double interpolation using cubic splines and linear lines
Authors:Han, Wenting
Author affiliation:Northwest A and F University, Yangling 712100, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 134-139
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A new evaluation method, with accompanying software SIUEW1.0, was developed to precisely calculate uniformity from catch-can test data. Water application depths of a rain-bird sprinkler 30PSH were calculated at each grid point. The Christiansen uniformity (CU) for four sprinklers in square and triangular spaced were computed with 1 m and 2 m spaces, and with 1 m and 0.25 m grid spaces. The results showed that the sequence of CUs from high to low is 2 m sampling spaces by linear interpolation, 2 m sampling spaces by cubic spline interpolation, 1 m sampling spaces by linear interpolation and 1m sampling spaces by cubic spline interpolation. CUs computed from 2 m space catch-can data are greater than that from 1 m space catch-can data by 3%-4%. CUs computed with cubic spline twice interpolation are less than that with linear interpolation by using nearest four points by 1.0%. The deviation between CUs computed from grid points with 1 m space and 0.25 m separately are less than 1.0%. It could be concluded from these results that the influence of sampling space, interpolation method, and grid space on CU is less and less in turn.
Number of references:5
Ei main heading: Interpolation
Ei controlled terms: Irrigation - Numerical control systems - Sampling - Splines-Sprinkler systems (irrigation)
Uncontrolled terms: Cubic splines - Double interpolation - Sprinkler irrigation -Uniformity - Sampling spaces - Linear interpolations - Grid points - Cubic spline interpolations - Sprinkler irrigations - Interpolation methods - Four points - High to lows - Can tests - Evaluation methodsEi classification codes:601.2 Machine Components - 731.1 Control Systems - 801 Chemistry - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 913.3 Quality Assurance and Control - 921.6 Numerical Methods - 922.1 Probability Theory
Database:Compendex
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38.Accession number:084611708498
Title:Spatial variability and correlation of soil nutrient and wheat yield
Authors:Chen, Shuren; Xiao, Weizhong; Zhu, Yunkai; Wang, Liguang
Author affiliation:Jiangsu University, Zhenjiang 212013, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 140-143
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Spatial distributions and relationship between available nitrogen, phosphorus, potassium and wheat yield in the Dantu area of Zhenjiang were analyzed by using geo-statistics and partial correlation analysis methods. Their spatial distribution maps were generated as well. The results showed that variables are all approximately normally distributed and have good spatial structure characteristics. Available nitrogen is closely related to wheat yield and 1000-grain weight, as their partial correlation coefficients are respectively 0.569 and 0.5. However, available phosphorus and potassium have little effect on wheat yield and 1000-grain weight. For their partial correlation coefficients are respectively 0.069, 0.284 and 0.147, 0.133.
Number of references:10
Ei main heading: Correlation methods
Ei controlled terms: Cluster analysis - Discriminant analysis - Grain (agricultural product)- Normal distribution - Nutrients - Phosphorus - Potassium - Regression analysis - Size distribution - Soils
Uncontrolled terms: Geo-statistics - Partial correlation analysis - Soil nutrient -Spatialvariability - Yield
Ei classification codes:423 Non Mechanical Properties and Tests of Building Materials - 454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 531.2 Metallography - 549.1 Alkali Metals - 723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 822.3 Food Products - 903.1 Information Sources and Analysis - 922 Statistical Methods - 922.1 Probability Theory - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids
Database:Compendex
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39.Accession number:084611708507
Title:Dynamic accuracy loss decomposition and tracing of measuring system based on BBSRIA
Authors:Jiang, Minlan; Wang, Xiaodong
Author affiliation:Zhejiang Normal University, Jinhua 321004, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 183-186 182
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on whole-system dynamic error modeling method and theory, the theory and method of dynamic accuracy loss decomposition and tracing were studied. Using bill belt signal reconstruction improvement arithmetic, the accuracy loss signal of emulation system was decomposed, its frequency components of the system's main insider structural units was obtained. Then by using non-linear mapping ability from input to output of BP NN, model parameters of the built accuracy loss function model of each insider cells were estimated, and the signals decomposing were achieved. Using the error characteristic of each insider structural units and the systemic whole error model, the signals tracing were achieved. Experimental result indicated that by using BBSRIA (bill belt signal reconstruction improvement arithmetic), reliably decompose and tracing of the accuracy loss signal could be achieved.
Number of references:9
Ei main heading: Reconstruction (structural)
Ei controlled terms: Decomposition - Digital arithmetic - Measurement theory - Measurements - Repair - Restoration - Signal analysis - Signal reconstruction
Uncontrolled terms: Bill belt signal reconstruction improvement arithmetic - Measuring system - Theory of dynamic accuracy loss decomposition and tracing - Accuracy losses - Structural units - Measuring systems - Frequency components - Emulation systems - Error models - Error characteristics - Model parameters - Input to outputs - Linear mappings - System dynamics
Ei classification codes:402 Buildings and Towers - 405.2 Construction Methods - 409 Civil Engineering, General - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 802.2 Chemical Reactions - 913.5 Maintenance - 921.6 Numerical Methods - 922 Statistical Methods - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
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40.Accession number:084611708508
Title:Camera calibration method of tri-linear interpolation error compensation
Authors:Cui, An; Liu, Yefeng; Yuan, Zhi; Wang, Longshan
Author affiliation:Jilin University, Changchun 130025, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 187-190
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A camera calibration method was put forward and applied to non-contacting detection for the front fender of a car. The spatial lattice has been constructed by using virtual target and the corner coordinates were extracted with SUSAN operator. In order to acquire the camera parameters, the corner coordinates have been brought into the camera model and the coordinates and error of these points were obtained. An iterative algorithm was presented to correct all the parameters till the error within the permission. The error compensation was performed by using tri-linear interpolation. The experiment showed that the method is rapid and has high stability and accuracy, and its precision is up to subpixel.
Number of references:7
Ei main heading: Error compensation
Ei controlled terms: Calibration - Cameras - Interpolation - Mathematical operators - Numerical control systems
Uncontrolled terms:Camera calibration - Subpixel - Tri-linear interpolation - Camera calibrations - Linear interpolations - Sub pixels - Camera parameters - High stabilities - SUSAN operators - Iterative algorithms - Camera models - Virtual targets - Front fenders
Ei classification codes:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 731.1 Control Systems - 742.2 Photographic Equipment - 902.2 Codes and Standards - 921 Mathematics - 921.6 Numerical Methods - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
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41.Accession number:084611708509
Title:Transform of linear tool path to NURBS
Authors:Zhu, Hu
Author affiliation:Shenyang Institute of Aeronautical Engineering, Shenyang 110136, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 191-193 168
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Aimed at the demand of NURBS tool path generation for high speed and high precision CNC machining, a new algorithm for generation of NURBS tool path based on linear tool path was proposed. The algorithm found out the segments of linear tool path that adapted to NURBS transformation by using the method of subsection the linear tool path according to the geometry features of linear tool path, and changed them to NURBS. If the interpolation error is bigger than the admit error, then subsection should be done at the data point which has the biggest error and transform them to NURBS over again. The case study indicated that the algorithm is feasibility and practicability.
Number of references:7
Ei main heading: Scanning
Ei controlled terms: Coordinate measuring machines - Machining - Mathematical transformations - Splines
Uncontrolled terms: CNC machining - NURBS - Tool path - Tool paths - NURBS tools - Interpolation errors - Geometry features - New algorithms - Case studies - Data points - High precisions - High speeds
Ei classification codes:601.2 Machine Components - 604.2 Machining Operations - 741.3 Optical Devices and Systems - 921.3 Mathematical Transformations - 943.3 Special Purpose Instruments
Database:Compendex
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42.Accession number:084611708510
Title:Experiment and simulation of cutter geometric parameter affecting stability in milling process
Authors:Li, Guangxu; Liu, Qiang
Author affiliation:Beihang University, Beijing 100083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 194-197 177
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Through experimental modal analysis and chatter stability lobes simulation, some uncertain factors of machine tool system affecting chatter stability lobes were studied. The research obtained: the cutter flute length, the cutter overhang, the cutter tooth number etc. were main cutter geometry factors affecting the chatter stability; according to actual requirements, cutter overhang should be strictly controlled and cutter parameters should be chosen properly in order to make the system remain high rigidity and cutter tooth number should be chosen reasonably which results in high performance stable milling process. The conclusion obtained has been verified through the industrial example.
Number of references:7
Ei main heading: System stability
Ei controlled terms: Dentistry - Experiments - Machine tools - Machinery - Milling(machining) - Modal analysis
Uncontrolled terms: Cutter - Geometric parameter - Milling process - Simulation - Chatter stabilities - Milling processes - Cutter teeth - Geometric parameters - Cutter geometries - Uncertain factors - Machine tool systems - Experimental Modal Analysis
Ei classification codes:461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 462.3 Dental Equipment and Supplies - 601 Mechanical Design - 603.1 Machine Tools, General - 604.2 Machining Operations - 731.4 System Stability - 901.3 Engineering Research - 921 Mathematics - 961 Systems Science
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
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43.Accession number:084611708511
Title:Spiral bevel gear's numerical control machining model with six axes five linkages
Authors:Chen, Shuhan; Yan, Hongzhi; Ming, Xingzu; Xie, Yaodong
Author affiliation:South Central University, Changsha 410083, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 198-201 139
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on the space coordinates transformation principle, the movement rules of the numerical controls spiral bevel gear machine with six axes five linkages were studied, and the machine machining coordinate systems were established. The principle was analyzed from the traditional machine to the numerical controls machine with six axes five linkages and its numerical control mathematical model was proposed. Moreover, according to the gear generating method of traditional machine, the gear generating machining principle of the spiral bevel gear with six axes five linkages was established. Finally, according to the example computation, the instantaneous locations and fourth-order expressions with the time were obtained when five linkage axes machining.
Number of references:4
Ei main heading: Bevel gears
Ei controlled terms: Chains - Intelligent control - Machining - Numerical control systems - Tools
Uncontrolled terms: Generated method - Machining model - Six axes five linkages - Spiral bevel gear - Transformation principle
Ei classification codes:601.2 Machine Components - 602.1 Mechanical Drives - 603 Machine Tools - 604.2 Machining Operations - 605 Small Tools and Hardware - 723.4.1 Expert Systems - 731.1 Control Systems
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
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44.Accession number:084611708512
Title:Research on in process pneumatic measurement system for inner hole honing
Authors:Yu, Baohua; Hu, Xiaoping; Ye, Hongxian
Author affiliation:Zhejiang University, Hangzhou 310027, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 10
Issue date:October 2008
Publication year:2008
Pages:p 202-206
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on the analysis of the working principle, the general project and main functional module were presented for in process pneumatic measurement system of inner hole honing dimension. The influence of main parameters in each sector to the gauge during differential pneumatic measurement was analyzed, and the key module-pneumatic measurement module was designed and tested. The result showed that the design of in process pneumatic measurement system is feasible. It could bring a new method for the research on in process pneumatic measurement system for inner hole honing dimension.
Number of references:14
Ei main heading: Measurements
Ei controlled terms: Honing - Pneumatics - Process engineering
Uncontrolled terms: Inner hole honing process - Measurement system - Pneumatic measurement - Measurement systems - In processes - Functional modules - Main parameters - Working principles
Ei classification codes:604.2 Machining Operations - 606.2 Abrasive Devices and Processes - 632.3 Pneumatics - 731 Automatic Control Principles and Applications - 913.1 Production Engineering - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
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