2008年第39卷第12期共收錄44篇
1.Accession number:090311865500
Title:Design and experiment on the dextral and laevogyrate helicoid cutting mechanism for no-till drills
Authors:Wei, Shuyan; Ma, Hongliang; Niu, Boying; Di, Yingliang; Wu,Yuntao
Author affiliation:Agricultural University of Hebei, Baoding 071001, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 69-72
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A dextral and laevogyrate helicoid driven cutting mechanism was developed for no-till drills in the area of two crops a year of Hebei province. In the operation of the no-tillage wheat drill, the mechanism worked well, moving the residue from the row, cutting off the corn stalk and rootstalk, loosening the soil of the seedbed andopening the seed furrows. The key parameters of the mechanism and anarc seeding-fertilizing opener were optimized and the optimalarrangement of the dextral and laevogyrate helicoid cutting mechanism was determined. In the field with cover of crop stubble, the anti-blocking performance of the new no-tillage wheat drill was well. The experimental result showed that it has a good ability to move the residue from the row and cut corn stalk and rootstalk. The depth of seeding fertilizer is 8.56 cm and the seeding depth is 4.3 cm. A good seedbed was made which is beneficial to seeds germinating and seedlings growing.
Number of references:6
Ei main heading:Machine design
Ei controlled terms:Agricultural machinery - Computer system firewalls - Crops - Drills - Electron transitions - Experiments - Grain (agricultural product)
Uncontrolled terms:Anti-block mechanism - No-till drills - Opener - Wheat - Cutting mechanisms - Corn stalks - Seeding depths - Cutting offs - Blocking performances - Optimal arrangements - Key parameters
Ei classification codes:601 Mechanical Design - 603.2 Machine Tool Accessories - 711.1 Electromagnetic Waves in Different Media - 723.2 Data Processing and Image Processing - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 901.3 Engineering Research - 931.3 Atomic and Molecular Physics
Database:Compendex
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2.Accession number:090311865100
Title:Vehicle yaw dynamics through combining four-wheel-steering and differential braking
Authors:Li, Bin; Yu, Fan
Author affiliation:Shanghai Jiaotong University, Shanghai 200240, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 1-4
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A control approach based on combining four-wheel steering and differential braking to improve vehicle yaw dynamics has been proposed. A fuzzy logic controller with two inputs and two outputs was designed considering the effects of four-wheel-steering and differential braking on yaw dynamics. The adequate yaw moment and rear wheel steering angles generated by the fuzzy logic controller made vehicle's actual yaw rate and sideslipped angle track their desired values. The vehicle model for simulation was established in Matlab/Simulink software environment. The simulations in some typical cases, including J turn and lane change, were carried out and the simulation results showed that compared with the individual control of these two systems, the combined control approach could improve vehicle handling and stability performance significantly, thus, the active safety of vehicle has been enhanced.
Number of references:11
Ei main heading:Steering
Ei controlled terms:Automobile parts and equipment - Automobile steering equipment - Braking - Control theory - Dynamics - Fuzzy control - Fuzzy inference - Fuzzy logic - Fuzzy sets - Fuzzy systems - Railroad cars - Vehicles - Wheels
Uncontrolled terms:Differential braking - Four-wheel steering - Yaw dynamics - Fuzzy logic controllers - Active safeties - Stability performances - Vehicle handlings - Combined controls - Individual controls - Simulation results - Lane changes -Matlab/Simulink softwares - Vehicle models - Angle tracks - Yaw rates - Rear wheels - YAW moments - Control approaches
Ei classification codes:432 Highway Transportation - 601.2 Machine Components - 602 Mechanical Drives and Transmissions - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment - 682.1.1 Railroad Cars - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.4 Artificial Intelligence - 723.4.1 Expert Systems - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.1 Mechanics - 961 Systems Science
Database:Compendex
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3.Accession number:090311865117
Title:PIV measurement and comparison of inner flow inside the double-channel and two-blade impeller
Authors:Zhao, Binjuan; Yuan, Shouqi; Liu, Houlin; Chen, Huilong; Liu, Dong
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 12
Issue date:December 2008
Publication year:2008
Pages:p 82-85
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 study the flow characteristics inside the double-channel impeller, a testing pump was designed and produced according to the special requirements for PIV measurement with two different impellers, i.e., the double-channel impeller and the two-blade impeller. The absolute flow fields inside the two impellers were measured respectively by PIV, and transferred to relative flow fields by special developed code. The results indicated that in the two-blade impeller, the fluid mainly flowed along the suction side, the velocity is very small on the pressure side, and a typical jet-wake flow has been observed. In the double-channel impeller, the flow has better flow pattern without obvious back-flow area. Under different operating conditions, the flow inside two impellers changed identically, with the increase of flow rate, the relative velocity became larger, while the absolute velocity became smaller. For both impellers, the best flow pattern has been observed under the design condition, and serious dispassion occurred under the smallest flow rate working condition.
Number of references:10
Ei main heading:Blowers
Ei controlled terms:Flow fields - Flow patterns - Flow rate - Gas turbines - Impellers - Ontology - Pulsatile flow - Theorem proving
Uncontrolled terms:Double-channel - PIV measurement - Two-blade - Blade impellers - Relative flows - Different operating conditions - Flow areas - Relative velocities - Wake flows - Pressure sides - Working conditions - Design conditions - Suction sides - Flow characteristics - Inner flows
Ei classification codes:461.1 Biomedical Engineering - 601.2 Machine Components - 612.3 Gas Turbines and Engines - 618.3 Blowers and Fans - 631 Fluid Flow - 631.1 Fluid Flow, General - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 903 Information Science - 921 Mathematics - 943.2 Mechanical Variables Measurements
Database:Compendex
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4.Accession number:090311865101
Title:Experiment on neural network nonlinear PID controller for the natural gas engine
Authors:Xu, Zhenjun; Yang, Zhao; Fang, Zheng
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 12
Issue date:December 2008
Publication year:2008
Pages:p 5-9 6
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A new neural network nonlinear PID controller (NNXPID) to enhance the performance of the system was proposed. It is easily accomplished by transmitting the proportion, integral, differential coefficient of PID to the neural network to train. The NNXPID was applied in the engine speed controller. The results from the experiment showed that the NNXPID controller has very good dynamic and static properties.Under the control of NNXPID, the steady speed regulation is lower than 5%, the fluctation rate of speed is lower than 0.5%, the instantaneous speed regulation is lower than 10%, and the time required to steady speed is lower than 5 s.
Number of references:7
Ei main heading:Gas engines
Ei controlled terms:Electric control equipment - Engines - Experiments - Gas industry - Gases - Internal combustion engines - Natural gas - Neural networks - Proportional control systems - Speed control - Speed - Three term control systems - Time varying control systems - Two term control systems
Uncontrolled terms:Engine speed controller - Natural gas engine - Nonlinear controller - Nonlinear PID - PID controllers - Instantaneous speeds - Speed regulations - Differential coefficients
Ei classification codes:461.1 Biomedical Engineering - 522 Gas Fuels - 612 Engines - 612.1 Internal Combustion Engines, General - 612.3 Gas Turbines and Engines - 617.3 Steam Engines - 654.2 Rocket Engines - 704.2 Electric Equipment - 723.4 Artificial Intelligence - 731.1 Control Systems - 731.3 Specific Variables Control - 732.1 Control Equipment - 901.3 Engineering Research - 911.2 Industrial Economics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
Database:Compendex
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5.Accession number:090311865102
Title:Development of light duty vehicle emission test host computer system
Authors:Huang, Qi; Jin, Zhenhua; Lu, Qingchun; Nie, Shengfang; He, Zelong
Author affiliation:Chongqing University, Chongqing 400044, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 10-13 17
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:To meet the requirements of light duty vehicle regulation test and research emission test, host computer system was developed. Hardware was designed based on virtual instrument architecture. Software was designed with unified modeling language. Function of data acquisition, flow control and data processing for light duty vehicle bag sampling, continuous dilution sampling and direct sampling were realized. Application in practice showed that the system, with all-around testing performance, reliable control and exact data, is fit for exhaust tests on light gasoline or diesel vehicles.
Number of references:8
Ei main heading:Data acquisition
Ei controlled terms:Data processing - Testing - Unified Modeling Language - Vehicles
Uncontrolled terms:Emission test - Host computer - Light duties - Host computer systems - Diesel vehicles - Unified Modeling - Direct samplings - Testing performances - Reliable controls - Virtual instruments - Bag samplings
Ei classification codes:422.2 Test Methods - 423.2 Test Methods - 432 Highway Transportation - 723.1.1 Computer Programming Languages - 723.2 Data Processing and Image Processing
Database:Compendex
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6.Accession number:090311865103
Title:Modeling and control of semi-active suspension with nonlinear damping
Authors:Wang, Ruochen; Jiang, Haobin; Zhang, Xiaoliang; Chen, Long
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 12
Issue date:December 2008
Publication year:2008
Pages:p 14-17
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 test results of tunable damper, the nonlinear relation was fitted between the damping and the angle of the stepping motor. The mathematical model of semi-active suspension with nonlinear damping was built and fuzzy dynamic optimal control strategy was designed. The controller of semi-active suspension with nonlinear damping was developed. On the basis of the simulation, the actual road test has been done. The results showed that the model of semi-active suspension with nonlinear damping was closer to the actual model, the comfort and the security were effectively improved and vehicle performance was coordinated.
Number of references:4
Ei main heading:Suspensions (components)
Ei controlled terms:Automobile parts and equipment - Automobile suspensions - Damping - Functions - Fuzzy control - Mathematical models
Uncontrolled terms:Semi-active suspension - Tunable damper - Nonlinear damping - Road tests - Optimal control strategies - Vehicle performances - Nonlinear relations - Test results - Modeling and controls
Ei classification codes:601.2 Machine Components - 632.1 Hydraulics - 662.4 Automobile and Smaller Vehicle Components -663.2 Heavy Duty Motor Vehicle Components - 723.4 ArtificialIntelligence - 731 Automatic Control Principles and Applications - 921 Mathematics - 931.1 Mechanics
Database:Compendex
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7.Accession number:090311865111
Title:Design of real time image processing system with intelligent automobile
Authors:Gong, Yongjian; Sheng, Fasheng; Chen, Dexian
Author affiliation:Jinhua College of Profession and Technology, Jinhua 321007, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 51-54
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:For the purposes of real time detection and identification of objects, a real time image processing system in intelligent automobile with high frame frequency and large filed of view image was designed by using MPC5200 as its main operational processor. The hardware composition and the theory behind the real time digital image processing system, and the application of the image processing algorithm were all discussed in detail. On the basis of experiments and analysis of detection and identification algorithms for objects, a real time image processing software has been developed, and acquisition and real time digital processing of images was realized. In this way the detection and identification capacity for objects of the system met the real time demands of intelligent automobile application.
Number of references:10
Ei main heading:Object recognition
Ei controlled terms:Automobile frames - Digital image storage - Image processing - Imaging systems - Systems analysis
Uncontrolled terms:Intelligent automobile - System design - Real times - Processing systems - Identification algorithms - Application of the image processing - Digital image processing - Digital processing - Image Processing softwares
Ei classification codes:662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 716 Telecommunication; Radar, Radio and Television - 722.1 Data Storage, Equipment and Techniques - 722.4 Digital Computers and Systems - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.1 Control Systems - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 751.1 Acoustic Waves - 912.3 Operations Research - 961 Systems Science
Database:Compendex
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8.Accession number:090311865118
Title:Intelligent jet self-priming centrifugal pump
Authors:Liu, Jianrui; Shi, Weidong; Yuan, Haiyu; Cheng, Aiping
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 12
Issue date:December 2008
Publication year:2008
Pages:p 86-88 117
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The pump was designed with a solar energy intelligent control system and the running process has been controlled by a PLC program. While the pump ran at off-design conditions, the intelligent control device could automatically adjust pump speed to prove working stability at the given conditions. Intelligent alarm control device was also used and the alarm would immediately in operation to stop the pump under the failing conditions, such as higher temperature, lower oil pressure, lower oil level, bearing wearing, and mechanical seal damage. The control system could also be used for remote operation. The self-priming pump was designed with a jet structure. When the self-priming process is completed, the valve on jet can be closed automatically, from which the efficiency of the pump can be increased by 3%-5%.
Number of references:12
Ei main heading:Process control
Ei controlled terms:Alarm systems - Centrifugal pumps - Concurrency control - Control systems - Hydraulic machinery - Intelligent control - Jets - Pneumatic control equipment - Pumping plants - Pumps - Renewable energy resources - Rotary pumps - Solar energy - Solar system
Uncontrolled terms:Alarm - Intelligent jet self-priming centrifugal pump - Plc programs - Intelligent alarms - Control devices - Running processes - Pump speeds - Remote operations - Intelligent control devices - Mechanical seals - Jet structures - Oil levels - Oil pressures - Higher temperatures - Design conditions - Intelligent control systems
Ei classification codes:402.1 Industrial and Agricultural Buildings - 446 Waterworks - 525.1 Energy Resources and Renewable Energy Issues - 615.2 Solar Power - 618.2 Pumps - 631.1 Fluid Flow, General - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 657.1 Solar Energy and Phenomena - 657.2 Extraterrestrial Physics and Stellar Phenomena - 723.3 Database Systems - 723.4.1 Expert Systems - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 732.1 Control Equipment - 914.1 Accidents and Accident Prevention - 914.2 Fires and Fire Protection
Database:Compendex
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9.Accession number:090311865119
Title:Hydraulic design of high specific speed model axial-flow pump
Authors:Yang, Jingjiang; Guan, Xingfan
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 12
Issue date:December 2008
Publication year:2008
Pages:p 89-92
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Different from traditional lifting design method and circular arc design method, streamline design method was employed to design high specific speed model axial-flow pump. The design method included linear amendment of exit circular and increased incidence angle from hub to tip of impeller. Ranges of incidence angle are from 0° to 3°, and the incidence angle becomes lower with higher specific speed. CFD technique was applied to simulate whole flow fields of model pump. Numerical results optimized the selection rules of hydraulic design parameters, and decreased more work on models made and models experiments. Then a series of model axial-flow pumps developed. These models have higher efficiency and broader high efficiency zones from the experimental results of countrywide model pump experiments in the same testing stand organized by Ministry of Water Resources in Tianjin city.
Number of references:8
Ei main heading:Mathematical models
Ei controlled terms:Design - Hydraulic models - Hydraulic structures - Hydraulics - Pumps - Speed control - Water piping systems - Water resources
Uncontrolled terms:Axial-flow pump - CFD - Design methods - Incidence angles - Hydraulic designs - High specific speeds - High efficiencies - And models - Selection rules - Numerical results - Tianjin - Testing stands - Cfd techniques - Specific speeds - Circular arcs
Ei classification codes:407.2 Waterways - 408 Structural Design - 441 Dams and Reservoirs; Hydro Development - 444 Water Resources - 446.1 Water Supply Systems - 446.2 Related Hydraulic Structures - 611 Hydroelectric and Tidal Power Plants - 618.2 Pumps - 619.1 Pipe, Piping and Pipelines - 632.1 Hydraulics - 643.2 Space Heating Equipment and Components - 731.3 Specific Variables Control - 802.1 Chemical Plants and Equipment - 902.1 Engineering Graphics - 921 Mathematics
Database:Compendex
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10.Accession number:090311865120
Title:Hydraulic characteristics of tube-contained raw material hydraulic transportation under different loads on the piped carriage
Authors:Li, Yongye; Sun, Xihuan; Yan, Yaoxing
Author affiliation:Taiyuan University of Technology, Taiyuan 030024, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 93-96 92
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 solve the principal problem on the transportation of agricultural products, the new technique of transporting agricultural products-the piped hydraulic transportation of tube-contained raw material was put forward. The technique did not only overcome the disadvantages of high cost and inefficiency, but also had the advantages of no pollution and no terrain restriction. Some hydraulic characteristics of the piped hydraulic transportation of tube-contained raw material under the different loads were researched on the piped carriage. The results showed the linear relationship between the load and the average velocity of the piped carriage was inversely proportional. Additionally, it was discovered that the fluidal pressure change of each cross section has been closely connected with the load of the piped carriage.
Number of references:7
Ei main heading:Materials handling
Ei controlled terms:Agricultural products - Buoyancy - Hydraulics - Tubes (components)
Uncontrolled terms:Hydraulic transportation characteristics - Load - Piped carriage - Hydraulic characteristics - Linear relationships - New techniques - Cross sections - Pressure changes - Average velocities - High costs
Ei classification codes:511.2 Oil Field Equipment - 616.1 Heat Exchange Equipment and Components - 619.1 Pipe, Piping and Pipelines - 631 Fluid Flow - 632.1 Hydraulics - 691 Bulk Handling and Unit Loads - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids
Database:Compendex
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11.Accession number:090311865121
Title:Experiment on temperature and moisture content of forage in deep bed solar drying process
Authors:Qian, Shanzhu; Wang, Chunguang; Liu, Guilin; He, Gang; Du, Jianqiang; Chun, Sheng
Author affiliation:Inner Mongolia Agricultural University, Huhhot 010018, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 97-101
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Deep bed solar drying experiments were conducted for alfalfa. An indirect forced convection solar dryer which consists of a solar air heater, a drying tower, an electric fan and a measurement system was used in the experiments. Hot air that heated by solar heater was forced through the forage by an electric fan. In order to examine the effect of drying element on the deep bed drying of alfalfa, the forage has been set into three layers, each layer was 1.2 m high, and drying experiment was performed in the drying tower at the meantime. Result showed that the drying temperature in real-time solar drying was affected by the weather elements, and the temperature of alfalfa was affected by the air temperature, humidity and the position of alfalfa in bed. Along the air flow, the temperature of the alfalfa which located near inlet point was higher than the one away from the inlet in the further place. And the moisture content of alfalfa and its drying rate were affected by the air temperature, humidity and the position of alfalfa in the bed. The drying rate of alfalfa was various based on its different position in the drying bed. It is more effective in high temperature and low humidity for deep bed wet alfalfa.
Number of references:8
Ei main heading:Dewatering
Ei controlled terms:Atmospheric temperature - Buildings - Curing - Experiments - Meteorology - Moisture determination - Moisture - Renewable energy resources - Solar dryers - Solar energy - Solar heating - Solar radiation - Solar system - Towers
Uncontrolled terms:Alfalfa - Deep bed drying - Drying rate - Moisture content - Solar drying - Air temperatures - Electric fans - Air flows - Hot airs - Weather elements - Drying temperatures - Measurement systems - Low humidities - High temperatures - Solar heaters - Solar air heaters
Ei classification codes:402 Buildings and Towers - 402.4 Towers - 443 Meteorology - 443.1 Atmospheric Properties - 525.1 Energy Resources and Renewable Energy Issues - 615.2 Solar Power - 642.1 Process Heating - 643.1 Space Heating - 657.1 Solar Energy and Phenomena - 657.2 Extraterrestrial Physics and Stellar Phenomena - 801.4 Physical Chemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 802.3 Chemical Operations - 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 901.3 Engineering Research - 944.2 Moisture Measurements
Database:Compendex
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12.Accession number:090311865122
Title:Calculation on heat transfer coefficient of impingement freezer
Authors:Xie, Jing; Zhang, Zhen; Xu, Shiqiong
Author affiliation:Shanghai Ocean University, Shanghai 201306, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 102-106
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 structure of an imported impingement air blast freezer, the design parameters of the evaporator with aluminum tube and fin were predefined. The refrigerant was R717, and refrigeration capacity was 70 kW. Heat transfer coefficient of air and refrigerant were calculated separately, regardless to the influence of dirt in the tube, the method for calculation heat transfer coefficient of this kind of evaporator was gained. By way of the experimental investigation on this type of evaporator, the calculation method was indicated to be reasonable.
Number of references:8
Ei main heading:Heat transfer
Ei controlled terms:Air - Alumina - Evaporators - Fins (heat exchange) - Freezing - Heat exchangers - Heat transfer coefficients - Refrigerants - Refrigerators - Thermoanalysis - Tubes (components)
Uncontrolled terms:Finned-tube evaporator - Freezer - Impingement air blast - Experimental investigations - Aluminum tubes - Calculation methods - Refrigeration capacities -Design Parameters
Ei classification codes:511.2 Oil Field Equipment - 616.1 Heat Exchange Equipment and Components - 619.1 Pipe, Piping and Pipelines - 641.2 Heat Transfer - 644.1 Refrigeration Methods - 644.2 Refrigerants - 644.3 Refrigeration Equipment and Components - 801 Chemistry - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 812.1 Ceramics - 822.2 Food Processing Operations
Database:Compendex
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13.Accession number:090311865129
Title:Evaluation schemes method for design based on information axiom and fuzzy mathematics
Authors:Tian, Qihua; Xiao, Renbin; Zhong, Yifang; Du, Yixian; Yang, Hongmei
Author affiliation:Huazhong University of Science and Technology, Wuhan 430074, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 136-140
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A novel evaluation method for design schemes was presented by combining information axiom and fuzzy membership function. The presented method did not have to give the weight of evaluating indicator, and thus the effect of subjective consciousness of the designer to the result of evaluation could be avoided. At the same time, the scheme evaluations were classified according to the true instances. The information content of qualitative indicators are hard to calculate when just applying the general information axiom, but was solved by using the fuzzy mathematic theory for design schemes evaluation. At last, the scheme evaluation of the mechanical driven system of decelerator was presented to illustrate the effectiveness of the proposed approach.
Number of references:11
Ei main heading:Membership functions
Ei controlled terms:Design - Functions - Fuzzy sets - Probability density function
Uncontrolled terms:Design scheme - Evaluation method - Fuzzy mathematics - Information axiom - Scheme evaluations - Driven systems - General informations - Information contents - Evaluating indicators - Fuzzy membership functions - Evaluation schemes
Ei classification codes:408 Structural Design - 902.1 Engineering Graphics - 921 Mathematics - 922.1 Probability Theory
Database:Compendex
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14.Accession number:090311865130
Title:Design of master-slave manipulators system and bilateral servo control strategy
Authors:Chen, Tiehua; Zhao, Dingxuan; Zhang, Zhuxin
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 12
Issue date:December 2008
Publication year:2008
Pages:p 141-145
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The master-slave force feedback control system of tele-operation was set up. The master manipulator system was composed of two 2DOF manipulators, and each one adopted two servo valves to control two hydraulic servomotors in order to obtain two rotational decoupling degrees. The master manipulator force information was used to control the servo valve so that the master manipulator could be driven, thus the problem that the master operation force could not directly drive the master manipulator hydraulic motor has been solved. The slave manipulator is 4DOF system that the original hydraulic shovel bucket was replaced by a new single degree manipulator claw, which set up a series joint 4DOF manipulator, and hydraulic proportional direction valve control method was applied to the slave manipulator. Force reflection servo and force symmetry bilateral servo control strategies were individually tested on the master-slave system to study the tele-operated force feedback bilateral servo control. The master manipulator's structure is reasonable, and the force symmetry bilateral servo control method has better control features.
Number of references:11
Ei main heading:Control systems
Ei controlled terms:Adaptive control systems - Feedback control - Feedback - Force control - Hydraulic machinery - Hydraulic motors - Hydraulic servomechanisms - Hydraulics - Manipulators - Motors - Neural networks - Pneumatic control equipment - Pneumatic servomechanisms - Reflection - Robotics - Servomotors - Valves (mechanical)
Uncontrolled terms:Electro-hydraulic servo system - Force reflection servo type control strategy - Force symmetry type control strategy - Force tele-presence - Master-slave robots
Ei classification codes:461.1 Biomedical Engineering - 601.2 Machine Components - 619.1.1 Pipe Accessories - 619.2.1 Tank Accessories - 632.1 Hydraulics - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 691.1 Materials Handling Equipment - 705.3 Electric Motors - 711 Electromagnetic Waves - 723.4 Artificial Intelligence - 731.1 Control Systems - 731.3 Specific Variables Control - 731.5 Robotics - 732.1 Control Equipment - 741.1 Light/Optics
Database:Compendex
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15.Accession number:090311865131
Title:Coupling analysis on dynamics tribology and elastic mechanics for a crankshaft bearing system
Authors:He, Zhixian; Gui, Changlin; Li, Zhen; Sun, Jun
Author affiliation:Anhui University of Technology and Science, Wuhu 241000, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 146-152
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Multidisciplinary coupling among dynamics, tribology and elastic mechanics (strength and stiffness of crankshaft) on a crankshaft-bearing system of a diesel engine with four pistons, which was applied on a rated load, was studied by self-designed program as well as the software of ADAMS and ANSYS. The Miner's theory and accumulative damage theory have been applied in calculating on fatigue strength of the crankshaft. It showed that there are obvious differences in calculating results between the coupling analysis and the traditional non-coupling analysis. The coupling analysis is necessary to improve the working reliability and its mechanical performance of a diesel engine because the various mechanical behaviors of a crankshaft-bearing system happened simultaneously with the engine working.
Number of references:10
Ei main heading:Crankshafts
Ei controlled terms:Bearings (structural) - Diesel engines - Dynamics - Engine pistons - Engines - Fatigue damage - Friction - Mechanics - Reliability analysis - Reliability - Tribology
Uncontrolled terms:Coupling analysis - Elastic mechanics - A crankshafts - Mechanical behaviors - Mechanical performances - Multidisciplinary couplings - Fatigue strengths - Damage theories - ON dynamics
Ei classification codes:401.1 Bridges - 408.2 Structural Members and Shapes - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 601.2 Machine Components - 612 Engines - 612.1.1 Internal Combustion Engine Components - 612.2 Diesel Engines - 617.3 Steam Engines - 654.2 Rocket Engines - 913 Production Planning and Control; Manufacturing - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
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16.Accession number:090311865141
Title:Numerical simulation analysis on drawing-hole forming technology to cylinder cup
Authors:Shi, Yuqing; Lou, Yi
Author affiliation:Zhejiang University of Science and Technology, Hangzhou 310023, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 191-195
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The new technique to improve forming property of sheet metal was put forward, stress on thickness of sheet metal has been decreased with drawing-hole drilled on round angle of die, and optimization of the sheet metal forming property was then achieved. Taking cylinder cup with flange as study example, deep drawing cylinder cup with flange was simulated by finite element method (FEM). It was verified theoretically with thickness reduction on critical section and FLD chart of cylinder cup with flange after deep drawing, the forming property and mechanism of new process was analyzed, and the technical key to improve forming property of sheet metal was proposed.
Number of references:23
Ei main heading:Drawing (forming)
Ei controlled terms:Cylinders (shapes) - Deep drawing - Dies - Finite element method - Flanges - Mathematical models - Metal drawing - Metal forming - Metals - Sheet metal
Uncontrolled terms:Cylinder cup - Drawing-hole - Round angle of die - Simulation - Forming properties - Thickness reductions - New techniques - New processes - Sheet metal forming - Critical sections - Forming technologies - Numerical simulations
Ei classification codes:408.2 Structural Members and Shapes - 531 Metallurgy and Metallography - 534.1 Foundries - 535.1 Metal Rolling - 535.2 Metal Forming - 603.2 Machine Tool Accessories - 619.1.1 Pipe Accessories - 816.1 Processing of Plastics and Other Polymers - 921 Mathematics - 921.6 Numerical Methods
Database:Compendex
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17.Accession number:090311865142
Title:Experiment on wear resistance of 55 steel bionic non-smoothed surfaces at high temperature
Authors:Yang, Zhuojuan; Han, Zhiwu; Ren, Luquan
Author affiliation:Jilin Teachers Institute of Engineering and Technology, Changchun 130052, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 196-199
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The design of partial multinomial regression on wear resistance of specimen was performed according to the techniques of experimental designing optimization method. Test model specimens made of 55 steel with regular concaves were processed by laser texturing technology technique. Investigations into topographical and tribological features were conducted on MG-2000 wear and abrasion test machine. As one important test index, wear loss was taken to be detected by using partial polynomial regression plan, and three test factors of temperature (300 °C, 500 °C), running time (180 s, 300 s), rotating speed (400 r/min, 600 r/min), non-smooth concave unit size(150 μm, 200 μm, 250 μm, 300 μm)and unit distributing density (250 μm, 350 μm at line and row has been fixed)were selected to investigate the effects on the surface wear loss of 55 steel samples. Multi-factor linear regression equation was derived from test data. According to their importance sorts to test results, the factors are temperature, running time, non-smooth concave unit size, rotating speed, unit distributing density respectively. Main wear-resistance mechanism of the non-smooth concave surface was analyzed at last.
Number of references:8
Ei main heading:Wear resistance
Ei controlled terms:Bionics - Experiments - Light measurement - Regression analysis - Rotating machinery - Rotation - Steel - Testing
Uncontrolled terms:55 steel - High temperature - Non-smooth - Running times - Rotating speeds - Resistance mechanisms - Abrasion tests - Multinomial - Linear regression equations - Steel samples - Test datums - Test results - Laser texturing - Surface wears - Test models - Concave surfaces - Polynomial regressions - Wear losses - Optimization methods - Smoothed surfaces
Ei classification codes:421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 423.2 Test Methods - 461.1 Biomedical Engineering - 545.3 Steel - 601.1 Mechanical Devices - 731.1 Control Systems - 901.3 Engineering Research - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements
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18.Accession number:090311865104
Title:Fuzzy control of automatic clutch during starting process
Authors:Wang, Xudong; Xie, Xianping; Wu, Xiaogang; Yu, Tengwei
Author affiliation:Harbin University of Science and Technology, Harbin 150040, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 18-22
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 problem of starting control of automatic clutch, an improved constant engine speed control strategy has been applied as the total control principle. A new clutch starting fuzzy control strategy by using throttle opening, relative deviation between engine speed and its target and engine speed change rate as the main control parameters was proposed. The strategy was supposed to implement constant engine speed control with jerk constraint. A long-term of experiments have been carried out and the experimental results showed the vehicle could start successfully under various conditions and the starting is smooth and quick, and is able to reflect driver's intention with small engine speed fluctuating. From the experimental result, we could draw the conclusion that the fuzzy control strategy has good self-adaptability.
Number of references:6
Ei main heading:Fuzzy control
Ei controlled terms:Control system analysis - Control theory - Engines - Experiments - Parameter estimation - Speed control - Speed regulators - Speed
Uncontrolled terms:Automatic clutch - Constant speed control - Self-adaptability - Engine speeds - Engine speed controls - Fuzzy control strategies - Relative deviations - Throttle openings - Jerk constraints - Main control parameters - Control principles - Starting processes
Ei classification codes:612 Engines - 617.3 Steam Engines - 654.2 Rocket Engines - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 732.1 Control Equipment - 901.3 Engineering Research - 921 Mathematics - 931.1 Mechanics
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19.Accession number:090311865112
Title:Analysis on factors affecting performance of rice kernel damage during threshing
Authors:Xu, Lizhang; Li, Yaoming; Li, Hongchang
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 12
Issue date:December 2008
Publication year:2008
Pages:p 55-59
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Rice kernel damage may become worse during threshing, while performance indexes of threshing unit such as un-threshed loss rate, power consumed, et al. were most focused on. Broken rate of threshing and stand damage index increment were used to validate damage degree. On the self-designed test equipment of the threshing separation performance, experiments were conducted for rice with different factors such as cylinder-concave clearance, linear velocity of spike tooth, feed rate and distance of spike tooth. With the orthogonal experiments, the analysis of variance and analysis of range were carried out and the factors that affecting rice damage during threshing were found, they were in turn of linear velocity of spike tooth, cylinder-concave clearance, distance of spike tooth. With the method of synthetic analysis, the optimization parameters were obtained.
Number of references:11
Ei main heading:Agriculture
Ei controlled terms:Cylinders (shapes) - Damage detection - Dentistry - Grain (agricultural product) - Regression analysis
Uncontrolled terms:Damage - Factors - Rice - Threshing - Linear velocities - Rice kernels - Concave clearances - Test equipments - Damage degrees - Stand damages - Orthogonal experiments - Optimization parameters - Separation performances - Loss rates - Threshing units
Ei classification codes:408.2 Structural Members and Shapes - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 462.3 Dental Equipment and Supplies - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 922.2 Mathematical Statistics
Database:Compendex
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20.Accession number:090311865113
Title:Design of disassemble rubber guard device for cell wheel feed
Authors:Luo, Xiwen; Wang, Zaiman; Jiang, Enchen; Li, Jiuhao; Li, Qing; Chen, Weitong
Author affiliation:South China Agricultural University, Guangzhou 510642, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 60-63
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Guard ring is usually used in the traditional cell wheel feed. Because of the relative movement and rub between the seeds and the guard ring, it will cause the damage of seeds and the wear and tear of the inner face of guard ring and the outer face of cell wheel. A disassemble rubber guard device was developed and the rubber guard tape could rotate with the cell wheel simultaneously. The rate of damaged seeds and the wear and tear of the outer face of cell wheel decreased significantly because there was no relative movement between the seeds and the rubber guard tape. The construct of the disassemble rubber guard device and the material, shape, strength and length of rubber guard tape were optimum designed. The disassemble rubber guard device was installed on the precision rice hill-drop drilling machine. The test results in laboratory and in field showed that the rate of damaged seeds is less than 0.3%.
Number of references:8
Ei main heading:Rubber
Ei controlled terms:Seed - Wheels
Uncontrolled terms:Rate of damaged seeds - Rice - Guard rings - Wear and tears - In fields - Test results - Drilling machines
Ei classification codes:601.2 Machine Components - 818.1 Natural Rubber - 821.4 Agricultural Products
Database:Compendex
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21.Accession number:090311865114
Title:Design and experiment on 2BMX5 no-till wheat-maize seeder
Authors:Yao, Zonglu; Gao, Huanwen; Wang, Xiaoyan; Li, Hongwen; Li, Wenying
Author affiliation:Chinese Academy of Agricultural Engineering, Beijing 100125, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 64-68
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A new no-till seeder, named 2BMX-5 no-till wheat-maize seeder, has been developed by China Agricultural University to solve the new problem of no-till seeder which the openers was braded that led to increase soil disturbance and fuel consumption in the area of one crop per year of North China. The wedge-shaped with front knife no-till opener consisted of front blade and pedestal and new driving device have been designed, and the split front blade was also designed. Field performance test was made in the field covered with wheat and rice residue in Inner-Mongolia and Ningxia. The results showed that the machine worked well without blockage and the depth of seeding and fertilizing could satisfy the agronomic requirement. Anti-blockage was improved and soil disturbance was decreased after adopted the wedge-shaped with front knife no-till opener. The seeding quality has been improved, and the results showed the cut stubble ratio was over 85 percent in the field covered with rice stubble.
Number of references:12
Ei main heading:Grain (agricultural product)
Ei controlled terms:Agricultural machinery - Soil conservation - Soils
Uncontrolled terms:Conservation tillage - No-till wheat seeder - Opener - Soil disturbances - Field performances - Driving devices - North chinas - Rice residues - Mongolia
Ei classification codes:483.1 Soils and Soil Mechanics - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 821.4 Agricultural Products
Database:Compendex
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22.Accession number:090311865115
Title:Design and experiment on paratactic separate application of fertilizer and seed mechanism
Authors:Wang, Qingjie; Li, Hongwen; He, Jin; Li, Wenying; Zhang, Xirui; Cai, Guohua
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 12
Issue date:December 2008
Publication year:2008
Pages:p 73-77
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:In view of the exist those main problems in the area of northeast ridge during the spring corn planting, such as large quantity of fertilizer, seed burned easily by the vertical fertilizing while lateral fertilization easily plugs openers, an undynamic anti-blocking mechanism and a paratactic separate application of fertilizer and seed mechanism were designed. The experiment in the field that covered with broken stalks of corn showed that the soil disturbance was 17.8%, planting depth was 44 mm, depth of fertilizer was 78 mm. The trial also showed that the level pitch of seed and fertilizer could be 32 mm, while the vertical spacing was 34 mm, and 93% could meet the requirements of agronomic. Compared to the orthophoric and lateral fertilizer application methods, the planting quality has been upgraded, while the blocking problem existed in the mentioned fertilization was also improved, and the opener could get through the straw more easily now.
Number of references:7
Ei main heading:Fertilizers
Ei controlled terms:Agricultural machinery - Agriculture - Applications - Experiments - Machine design - Seed
Uncontrolled terms:Corn - No-tillage planter - Paratactic separate application of fertilizer and seed - Soil disturbances - Blocking problems - Fertilizer applications - Vertical spacings - Blocking mechanisms
Ei classification codes:451.2 Air Pollution Control - 601 Mechanical Design - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 901.3 Engineering Research
Database:Compendex
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23.Accession number:090311865116
Title:Numerical simulation flowing character of modulated spray nozzle's valve
Authors:Zhang, Bo; Wu, Chundu; Zhang, Wei; Yang, Xuejun; Chu, Jinyu
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 12
Issue date:December 2008
Publication year:2008
Pages:p 78-81
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A modulated spraying nozzle control system can be used for variable rate chemical application. The transient numerical simulation of high speed valve was modeled by CFD software Fluent to research the flowing character in the solenoid valve. The result showed that there was suction pressure generated at outlet of valve when it just opened, which would result in air-sucking and effect atomization quality, also at lapse in the shut down time of the valve, it was harmful for the atomization. When the valve was opening, the pressure of outlet was equal to that of inlet, when it was just opening, both the pressure and flow rate met the maximal level, with two zones increased sharply. The forming, developing and transporting complex process of vortex was found during the valve opening and closing.
Number of references:10
Ei main heading:Nozzles
Ei controlled terms:Atomization - Computer simulation - Control systems - Flow rate - Hydraulics - Mathematical models - Pesticides
Uncontrolled terms:CFD - Modulated spray nozzle - Variable rate spraying - Suction pressures - Solenoid valves - Atomization qualities - Chemical applications - CFD softwares - High speeds - Complex processes - Valve openings - Shut downs - Transient numerical simulations - Numerical simulations
Ei classification codes:631 Fluid Flow - 631.1 Fluid Flow, General - 632.1 Hydraulics - 723.5 Computer Applications - 731.1 Control Systems - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 821.2 Agricultural Chemicals - 921 Mathematics - 943.2 Mechanical Variables Measurements
Database:Compendex
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24.Accession number:090311865123
Title:Separation and purification of polyphenols crude extracts from tea flower (camellia sinensis L O kuntze) and their antioxidative activities
Authors:Huang, Agen; Dong, Ruijian; Lu, Maolin; Wang, Zhijun
Author affiliation:Yangzhou University, Yangzhou 225001, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 107-111
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 utilize waste tea flowers (Camellia sinensis L O Kuntze) and develop an industrialized way to refine tea flower polyphenols, a novel method for obtaining high purity of tea flower polyphenols by various ethanol concentration gradient elution was established based on the previous technology of "ultra-filtration-resin absorption-ethanol elute extraction of tea flower polyphenols". The results showed that an average content as high as 92.25% of refined tea flower polyphenols could be collected by gradient elution of 10%, 20%, 30% and 40% ethanol elute followed, whereas single elution of 70% ethanol elute only led to 84.32% content of tea flower polyphenols. Therefore, catechins in various eluant components were effectively separated. There was also a good correlation between their purity and scavenging efficiency of ·OH and DPPH·, both of which were higher than that of the crude extracts. Ethanol (20%) elution led to the highest EGCG content of 67.39%, and effectively removed theine in the final products which may directly used as antioxidants.
Number of references:13
Ei main heading:Phenols
Ei controlled terms:Block codes - Ethanol - Porous materials - Refining - Resins
Uncontrolled terms:Antioxidative activity - Catechins - Gradient elution - Tea flower - Tea polyphenols
Ei classification codes:513.1 Petroleum Refining, General - 523 Liquid Fuels - 533.2 Metal Refining - 723.1 Computer Programming - 802.3 Chemical Operations - 804.1 Organic Compounds - 811.1.1 Papermaking Processes - 815.1.1 Organic Polymers - 822.2 Food Processing Operations - 951 Materials Science
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25.Accession number:090311865132
Title:Precise definition of contact angle field on high speed angular-contact ball bearing under axial load
Authors:Zhao, Chunjiang; Cui, Guohua; Wang, Guoqiang; Huang, Qingxue; Zhang, Fangping
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 12
Issue date:December 2008
Publication year:2008
Pages:p 153-156 209
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 system analysis of dynamic equations group of high-speed angular-contact ball bearing, an analysis to find the ultimate variables of the adjunct equations was given, and a chart about coupled variables was obtained which showed that the contact angle are the ultimate variables. Based on above-mentioned analysis, according to the feature of the bearing under axial load, an algorithm has been put forward, which took the contact angle as the iterate variables. Based on the present calculation results, an analysis was given, which showed that the increment of internal contact angle is larger than that of external contact angle, the analysis would be helpful to define the contact angle field. By using the method of contact angle iterate, an example was given, which verified the analysis of increment of contact angle is correct. So the search field of contact angle has been reduced half, and the calculation is simplified obviously.
Number of references:12
Ei main heading:Contact angle
Ei controlled terms:Axial loads - Ball bearings - Bearings (structural) - Dynamic analysis - Speed - Spheres
Uncontrolled terms:Analysis of ultimate variables - Field of contact angle - High speed angular-contact ball bearing - Precise definition - External- - Internal contacts - Dynamic equations - Search fields - System analysis
Ei classification codes:401.1 Bridges - 408 Structural Design - 408.2 Structural Members and Shapes - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 601.2 Machine Components - 631 Fluid Flow - 631.1.1 Liquid Dynamics -931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
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26.Accession number:090311865133
Title:Dynamics modeling of 2DOF five-bar mechanism in considering dissipation of joint
Authors:Li, Renjun; Liu, Hongzhao; Li, Pengfei
Author affiliation:Xi'an University of Technology, Xi'an 710048, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 157-161
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The friction was disposed as an external non-inertia force, and a mended Appell equation including the friction of system was put forward. The kinematic characteristics of a planar closed-loop five-bar mechanism were analyzed by using the method of kinematic influence coefficient. The dissipation function of the mechanism system was proposed, then the generalized dissipation forces were deduced. The dynamics model of the mechanism which included the joint friction was proposed by means of the mended equation. And arithmetic was presented to solve these equations. The results of inverse dynamics testified the correction of the model. The outcomes of simulation indicated that joint friction has obvious influence on motion parameters of the mechanism.
Number of references:8
Ei main heading:Tribology
Ei controlled terms:Bars (metal) - Dynamics - Equations of motion - Friction -Functions - Kinematics - Probability density function
Uncontrolled terms:Closed-loop five-bar mechanism - Dissipation function - Generalized dissipation force - Joint friction - Kinematic influence coefficient
Ei classification codes:535.1.2 Rolling Mill Practice - 921 Mathematics - 921.2 Calculus - 922.1 Probability Theory - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
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27.Accession number:090311865105
Title:Control strategy as shifting progress with an electronic automatic transmission
Authors:Sun, Wentao; Chen, Huiyan
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 12
Issue date:December 2008
Publication year:2008
Pages:p 23-26 81
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The shift system of electronic automatic transmission was analyzed, and a mathematic model of the shifting process was set up. The model could be used directly for shifting process control. With the model the shifting process was also analyzed, and the rule of shifting process was obtained. The process of the clutch applies and exhaust was analyzed. Through adjusting the pressure by using PWM to control the solenoids, the pressure was controlled in good conditions. Trough the research, the system used the open-loop control during the fill-time phase, faxed ramp rate control during the second phase and closed-loop control during the third phase by using PID control strategy. At the same time, the electronic engine was used to adjust the engine speed to acquire the better quality of shifting process. Finally, though a bench test, the control strategy of shifting process of the electronic automatic transmission was obtained.
Number of references:6
Ei main heading:Process control
Ei controlled terms: Automobile engines - Automobile parts and equipment - Closed loop control systems - Control system synthesis - Control theory - Industrial management - Mathematical models - Proportional control systems - Vehicle transmissions
Uncontrolled terms:Control strategy - Electronic automatic transmission - Shifting process - Bench tests - Engine speeds - Electronic engines - PID controls - Closed-loop controls - Ramp rates - Loop controls - Mathematic models - Shift systems
Ei classification codes:602.2 Mechanical Transmissions - 661.1 Automotive Engines - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 912.2 Management - 921 Mathematics - 961 Systems Science
Database:Compendex
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28.Accession number:090311865106
Title:Motor control in vehicle chassis integrated control system
Authors:Niu, Limin; Chen, Long; Zhao, Youqun; Wang, Ruochen
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 12
Issue date:December 2008
Publication year:2008
Pages:p 27-30 44
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 harmonize the performance of vehicle handling stability and riding comfort, an integrated controller of vehicle chassis system was designed based on embedded system after analyzing the principles of semi-active suspension (SAS) and electric power steering (EPS). Stepper motor of suspension adjustable damper and DC motor of EPS were controlled respectively by hardware. Fuzzy and PID arithmetic were applied in software. United adjustment to hardware was done with HyperTerminal under the condition of CodeWarrior integrated development. Experiment results proved the controller and motors were running reliably, handling stability and riding comfortably when integrated condition were being improved.
Number of references:10
Ei main heading:Automobile parts and equipment
Ei controlled terms:Automobile steering equipment - Automobile suspensions - Control systems - DC motors - Electric power measurement - Force measurement - Integrated circuits - Integrated control - Motors - Steering - Suspensions (components) - System stability - Vehicles
Uncontrolled terms:Electric power steering - Semi-active suspension - Vehicle chassis - Integrated controllers - Integrated control systems - Stepper motors - Riding comforts - HyperTerminal - Integrated developments - Handling stabilities - Vehicle handlings - In vehicles - Motor controls
Ei classification codes:432 Highway Transportation - 601.2 Machine Components - 632.1 Hydraulics - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty MotorVehicle Components - 671.2 Ship Equipment - 705.3 Electric Motors - 705.3.2 DC Motors - 714.2 Semiconductor Devices and Integrated Circuits - 731.1 Control Systems - 731.4 System Stability - 942.2 Electric Variables Measurements - 943.2 Mechanical Variables Measurements - 961 Systems Science
Database:Compendex
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29.Accession number:090311865107
Title:Electric park bake system
Authors:Guo, Lishu; Shi, Zhengtang; Zhang, Zhengbing; Ma, Zhimin; Zhang, He
Author affiliation:Zhejiang Asia-Pacific Mechanical and Electronic Co. Ltd., Hangzhou 311203, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 31-33
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The structure and the mechanism for the electric park brake (EPB) were analyzed first.Then, the dynamical analysis for the executive device of EPB was done. After that, an EPB system was designed in the viewpoint of practical application. Aimed at applying or releasing braking, the electric control unit (ECU) adopted a single-chip microprocessor (SCM) named Philips 592 and the executive device, which was driven by a direct current motor that adopted a synchronous belt driven mechanism, a planetary gear mechanism with small teeth difference and a screw-driven mechanism. Lastly, the efficiency of the EPB system was validated by bench tests for a detail automotive model. The results of the bench tests showed that the static characteristic and the dynamic characteristic of the EPB met the requirement of theoretical calculation.
Number of references:7
Ei main heading:Control systems
Ei controlled terms:Gear teeth - Parks - Power transmission - Vehicle transmissions
Uncontrolled terms:Planetary gear transmission - Bench tests - Planetary gear mechanisms - Synchronous Belts - Direct current motors - Static characteristics - Philips - Automotive models - Dynamic characteristics - Theoretical calculations - Micro-processors - Electric control units - Dynamical analysis
Ei classification codes:403.1 Urban Planning and Development - 403.2 Regional Planning and Development - 601.2 Machine Components - 602.2 Mechanical Transmissions - 731.1 Control Systems
Database:Compendex
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30.Accession number:090311865108
Title:Application of electromechanical brake system in adaptive cruise control
Authors:Yang, Kun; Li, Jing; Li, Youde; Rong, Rui; Tan, Shuliang; Guo, Lishu
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 12
Issue date:December 2008
Publication year:2008
Pages:p 34-38 106
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing,100083, China
Abstract:Because electromechanical brake (abbr. EMB) can be integrated with ABS/ESP/ACC very easily and adaptive cruise control (abbr. ACC) requires the car with the function of active brake, the primary research of ACC based on EMB was given. For this purpose, the out-line simulation platform including mathematical models for engine, EMB, vehicle, ACC arithmetic and virtual scene has been built and the simulation on two typical follow conditions was given. The results showed that the ACC based on EMB could control the velocity of ACC vehicle and the headway of cars effectively and the virtual scene could show the change for headway of cars and velocity of vehicles intuitively, so it is helpful for us to optimize control algorithm.
Number of references:9
Ei main heading:Adaptive control systems
Ei controlled terms:Functions - Mathematical models - Vehicles - Virtual reality
Uncontrolled terms:Adaptive cruise control - Electromechanical brake - Simulation - Virtual scenes - Active brakes - Control algorithms - ACC vehicles - Simulation platforms
Ei classification codes:432 Highway Transportation - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 921 Mathematics
Database:Compendex
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31.Accession number:090311865109
Title:Dynamics model analysis on five-axle vehicle with all-wheel steering
Authors:Leng, Shaohua; Gao, Li; Wang, Shufeng; Zhu, Yongqiang
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 12
Issue date:December 2008
Publication year:2008
Pages:p 39-44
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 enhance the handling stability of multi-axle vehicle, a mechanical analysis on high-speed inphase steering conditions of five-axle vehicle with all-wheel steering has been done, and the related kinematics differential equations of vehicle with 24 freedom degrees were established, the mechanical model of the tyre has been built based on Fiala-tyre model. Finally, VI sub-function compiled by C language was inserted into LabVIEW graphical codes by MathScript node. The whole vehicle dynamics simulation program has been built based on LabVIEW software. The virtual test simulation results showed that all-wheel steering technology would make rear-axle wheel steer ahead of 0.15 s, and the rear wheel could steer with the front wheel at the same time so that the steering response rate could be improved and the roll angle of vehicle body would be reduced from 7.5° to 4°.
Number of references:10
Ei main heading:Automobile parts and equipment
Ei controlled terms: Automobile steering equipment - Axles - Dynamics - Modal analysis - Railroad cars - Steering - Vehicles - Vibrations (mechanical) - Wheels
Uncontrolled terms:All-wheel steering - Dynamics model - Five-axle vehicle - Rear wheels - Wheel steers - Simulation results - Virtual tests - Labview softwares - Vehicle dynamics simulations - C languages - Tyre models - Vehicle bodies - Mechanical models - Roll angles - Response rates - Front wheels - Freedom degrees - Mechanical analysis - Handling stabilities
Ei classification codes:432 Highway Transportation - 601.2 Machine Components - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment - 682.1.1 Railroad Cars - 921 Mathematics - 931.1 Mechanics
Database:Compendex
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32.Accession number:090311865110
Title:Analysis on bifurcation and destabilization of high-dimensional vehicle lateral dynamics
Authors:Yang, Xiujian; Wang, Zengcai
Author affiliation:Shandong University, Ji'nan 250061, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 45-50 77
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 formulate the relationship between vehicle state responses and tire stiffness, a 4D nonlinear vehicle lateral dynamic system consisting of roll and planar motions was founded by utilizing a quadratic tire model. Then the 4D nonlinear system has been simplified to the center manifold to a one order system with the center manifold theory. The stability characteristics in symmetrical and μ-split road conditions were analyzed by bifurcation theory and time-domain simulations. The results demonstrated that the singular point corresponded to the critical state where if bifurcation occurred the vehicle would lose stability. So the vehicle stability at the critical conditions could be improved by changing the front wheel steering angle and it would be a new idea to combine the bifurcation theory and the active steering control technique.
Number of references:13
Ei main heading:Automobile parts and equipment
Ei controlled terms:Automobile frames - Automobile steering equipment - Bifurcation (mathematics) - Control system analysis - Control theory - Critical current density (superconductivity) - Dynamical systems - Dynamics - Nonlinear systems - Steering - System stability - Vehicles
Uncontrolled terms:Bifurcation - Center manifold - Nonlinear dynamics - Vehicle lateral dynamics - Bifurcation theories - Time-domain simulations - Singular points - Road conditions - Tire models - Tire stiffnesses - Stability characteristics - Front wheels - Critical conditions - New ideas - Center manifold theories - Active steering controls - Vehicle stabilities - Critical states - Order systems - Planar motions - Vehicle states
Ei classification codes:432 Highway Transportation - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 731.1 Control Systems - 731.4 System Stability - 921 Mathematics - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 961 Systems Science
Database:Compendex
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33.Accession number:090311865134
Title:Robust optimization design based on maximal variation analysis
Authors:Xu, Huanwei; Sun, Wei; Zhang, Xu
Author affiliation:Dalian University of Technology, Dalian 116024, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 162-165
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:In view of robustness of objective function and constraints in robust design, a new robust design method based on maximal variation analysis was proposed. Firstly, the principle of variations which have been generated in objective functions and constraints by considering the uncertain factors in design variables and design parameters were analyzed, then the maximal variations of objective function and constrains were estimated by using maximal variation analysis. The maximal variations of constraints were added to original constraints to guarantee feasibility of constraints; a new constraint has been added to original optimization problem to ensure the variation of objective function was less than the value which designer set, and then a bi-level mathematical optimal model was constructed. The top-level optimization was used to solve the original mathematical model; the lower-level optimization was used to judge the robustness of objective function and constraints. Example results showed that the proposed approach is feasible.
Number of references:10
Ei main heading:Functions
Ei controlled terms:Constrained optimization - Design - Function evaluation -Mathematical models - Optimization - Probability density function - Product design - Uncertainty analysis
Uncontrolled terms:Constraints feasibility robustness - Maximal variation analysis - Objective function robustness - Robust design - Objective functions - Variations of - Optimization problems - Design Parameters - Design variables - Optimal models - Uncertain factors - Robust design methods - Robust optimizations
Ei classification codes:408 Structural Design - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 731.1 Control Systems - 902.1 Engineering Graphics - 913.1 Production Engineering - 921 Mathematics - 921.5 Optimization Techniques - 921.6 Numerical Methods - 922.1 Probability Theory - 961 Systems Science
Database:Compendex
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34.Accession number:090311865135
Title:Small defect extracting based on region growing algorithm and grey relational analysis
Authors:Wang, Zhongyu; Fu, Jihua; Meng, Hao; Yang, Wenping
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 12
Issue date:December 2008
Publication year:2008
Pages:p 166-169
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A region growing algorithm based on the grey relational analysis was proposed. By means of calculating the two-dimension grey absolute relational grade, the original image was turned to a grey relational image only containing the edge information. Meanwhile, by the region marking of the grey relational image, the centers of small defects were obtained. And these centers were used as the seeds pixels to do the region growing and the detect extracting in the grey relational image. The experimental results indicated that the new region growing algorithm could suppress the background noise, simplify the calculating process, and meet the requirements of the real time extracting effectively.
Number of references:11
Ei main heading:Image processing
Ei controlled terms:Computer vision - Defects - Digital image storage - Edge detection - Image segmentation Uncontrolled terms:Grey relational analysis - Machine vision - Region growing algorithm - Region growing algorithms - Background noises - Original images - Real times - Edge informations - Relational grades
Ei classification codes:423 Non Mechanical Properties and Tests of Building Materials - 531.2 Metallography - 716 Telecommunication; Radar, Radio and Television - 722.1 Data Storage, Equipment and Techniques - 722.4 Digital Computers and Systems - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.6 Robot Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 741.2 Vision - 741.3 Optical Devices and Systems - 751.1 Acoustic Waves - 933.1 Crystalline Solids - 951 Materials Science
Database:Compendex
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35.Accession number:090311865136
Title:Engine fault diagnosis model based on sound intensity analysis and neural network integration
Authors:Li, Zengfang; He, Yong; Xu, Gaohuan
Author affiliation:Zhejiang Water Conservancy and Hydropower College, Hangzhou 310018, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 170-173
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A new engine fault diagnosis model based on sound intensity signal and BP neural network integration was proposed. Firstly, the sound intensity signals were decomposed and recomposed by using wavelet packets. Afterwards, the signal energy values were extracted from each frequency band, and were used as input features into the BP neural network integration for fault pattern recognition. It has been testified by the experimentation of the 3Y Toyota 2.0 engine and the results showed that it could increase the efficiency and accuracy of the system.
Number of references:9
Ei main heading:Neural networks
Ei controlled terms:Acoustic intensity - Backpropagation - Computer networks - Engines - Failure analysis - Feature extraction - Frequency bands - Integration - Pattern recognition - Quality assurance - Reliability - Signal processing
Uncontrolled terms:Fault diagnosis - Neural network integration - Sound intensity - Wavelet packet - BP neural networks - Fault diagnosis models - Fault pattern recognitions - Input features - Signal energies
Ei classification codes:421 Strength of Building Materials; Mechanical Properties - 461.1 Biomedical Engineering - 612 Engines - 617.3 Steam Engines - 654.2 Rocket Engines - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 716.4 Television Systems and Equipment - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 723.5 Computer Applications - 741.1 Light/Optics - 751.1 Acoustic Waves - 751.2 Acoustic Properties of Materials - 913.3 Quality Assurance and Control - 921 Mathematics - 921.2 Calculus - 922.2 Mathematical Statistics
Database:Compendex
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36.Accession number:090311865137
Title:Direct displacement solution of the tricept robot based on ordered single-opened-chain
Authors:Feng, Zhiyou; Wang, Zhiguo; Zhang, Ce; Yang, Tingli
Author affiliation:Tianjin Polytechnic University, Tianjin 300160, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 174-177 122
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing,100083, China
Abstract:A new numerical approach of direct displacement solution for the Tricept robot based on ordered single-opened-chain was presented. The minimum dimension direct displacement equations of the system, equal to the coupling degree, were derived according to the topological structural characteristics. The analysis course was simple and could obtain all the real direct solutions. Eight real direct solutions of the Tricept robot have been obtained by a 2D search and the search is efficient.
Number of references:9
Ei main heading:Robots
Ei controlled terms:Mechanisms - Robotics
Uncontrolled terms:Direct displacement solution - Parallel mechanism - Single-opened-chain - Direct solutions - D searches - Structural characteristics - Coupling degrees - Displacement equations - Numerical approaches
Ei classification codes:601.3 Mechanisms - 731.5 Robotics - 731.6 Robot Applications
Database:Compendex
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37.Accession number:090311865124
Title:Extrusion and enzyme hydrolysis technology of starch syrup
Authors:Xiao, Zhigang; Shen, Dechao
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 12
Issue date:December 2008
Publication year:2008
Pages:p 112-117
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:In the test, the starch syrup was obtained by extrusion and enzyme hydrolysis of corn meal. With the aid of the combination design of quadratic orthogonal rotation, the influential rules of extrusion factors to DE value was demonstrated, and the technology conditions of liquefaction and saccharification were established by orthogonal design. The results showed that when heating temperature of extruded was set to 64.2-70.9°C, rotation speed of extruder was 193-202 r/min, moisture of material was 18.43%-19.66%, die hole aperture of extruder was 12.2-13.0 mm, and the enzyme hydrolysis technology according to the ratio between water and material was 3.0 mL/g, liquefaction was 20 min, saccharification was 40min, the DE value was about 40.80%.
Number of references:9
Ei main heading:Saccharification
Ei controlled terms:Enzymes - Extruders - Extrusion - Hydrolysis - Liquefaction - Rotation - Starch
Uncontrolled terms:Enzyme hydrolysis - Technology conditions - Die holes - Quadratic orthogonal rotations - Combination designs - Rotation speeds - Heating temperatures - Orthogonal designs - Corn meals
Ei classification codes:461.2 Biological Materials and Tissue Engineering - 535.2.1 Metal Forming Machines - 535.2.2 Metal Forming Practice - 601.1 Mechanical Devices - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 811.3 Cellulose, Lignin and Derivatives - 815.1.1 Organic Polymers - 816.1 Processing of Plastics and Other Polymers - 816.2 Plants and Machinery for Plastics and Other Polymers - 822.3 Food Products - 931.1 Mechanics
Database:Compendex
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38.Accession number:090311865125
Title:Optimization of semi-hard cheese processing technology
Authors:He, Jialiang; Li, Kaixiong; Zhu, Wenxue; Li, Xingke
Author affiliation:He'nan University of Science and Technology, Luoyang 471003, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 118-122
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:On the basis of single factor experiment, the influence of the addition of starter, addition of rennet and salt concentration on the quality of semi-hard cheese was studied to ascertain the optimal processing parameters. With sensory value as appraising index, three elements quadratic current revolving design were adopted to optimize processing technology. Results indicated, salt concentration has the most important influence on the sensory value, rennet addition is the next, and starter addition is the last; the optimum parameter is that the addition of starter is 2.645%, the addition of rennet is 23.27 mg/kg and salt concentration is 23.482%; starter addition and rennet addition, starter addition and salt concentration have obvious mutual effect.
Number of references:12
Ei main heading:Starters
Ei controlled terms:Optimization - Technology
Uncontrolled terms:Processing technology - Semi-hard cheese - Salt concentrations -Optimal processing - Mutual effects - Optimum parameters - Cheese processing
Ei classification codes:612.1.1 Internal Combustion Engine Components - 617 Turbines and Steam Turbines - 661.2 Automotive Engine Components - 705.1 Electric Machinery, General - 901 Engineering Profession - 921.5 Optimization Techniques
Database:Compendex
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39.Accession number:090311865126
Title:Finite element analysis and measurement for array piezocrystals grain losses sensor
Authors:Mao, Hanping; Ni, Jun
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 12
Issue date:December 2008
Publication year:2008
Pages:p 123-126
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 improve the accuracy and reliability of grain loss measuring, a scheme of constructing piezocrystal vector sensor arrays was put forward, which realized multi-point parameter real-time measurement. Kinetic model of the grain and straw impacting sensor has been analyzed by the finite element method. According to the dimension of sensitive plate, its model was created via ANSYS to compute the vibration mode and extract resonance frequency of the sensitive element. The location and the quantity of piezocrystal were identified among the vector sensor arrays by analyzing the vibration shape and distribution of dynamic strain about low order modes of sensitive element, which optimized the structure of array. The grain and straw impacting sensor was preceded on test bench. The analysis result has been compared with the measure result that obtained by the dynamic signal analyzer, the conclusion showed that the experimental results was well coincided with theory results. All these are help to devise piezocrystal vector sensor arrays for grain loss of combine and amend its parameters.
Number of references:9
Ei main heading:Finite element method
Ei controlled terms:Computer simulation - Control equipment - Modal analysis - Reliability analysis - Reliability - Resonance - Sensor arrays - Sensors - Time measurement -Vectors
Uncontrolled terms:Dynamic simulation - Finite element - Model analysis - Sensitive element - Structure of array
Ei classification codes:421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 701 Electricity and Magnetism - 716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications - 732 Control Devices - 732.1 Control Equipment - 732.2 Control Instrumentation - 751.1 Acoustic Waves - 801 Chemistry - 913 Production Planning and Control; Manufacturing - 913.3 Quality Assurance and Control - 921 Mathematics - 921.1 Algebra - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 931.1 Mechanics - 943.3 Special Purpose Instruments
Database:Compendex
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40.Accession number:090311865127
Title:Egg-shell crack multi-level detection based on the singularity feature of dynamic resonance
Authors:Wang, Qiaohua; Deng, Xiaoyan; Wen, Youxian
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 12
Issue date:December 2008
Publication year:2008
Pages:p 127-131
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A singularity indicator of time-domain pulse response signal, related with the singular intensity and frequency band, was presented by using wavelet transform modulus maxima, in which the response signal has been detected by a mini-microphone and sound adapter when egg-shell was excited with a mechanical impact. The analysis showed that the most singularity indicators of the cracked eggs only located in the low-frequency bands with big indicator values, meanwhile those of the intact eggs were found in the more frequency bands with small indicator values. A standard value, as singular indicator was defined with weighted average value, and a multi-level scheme for egg-shell crack detection has been proposed. Test results with 96% recognition ratio showed the efficiency of the proposed multi-level detection method.
Number of references:10
Ei main heading:Frequency response
Ei controlled terms:Crack detection - Dynamic response -Frequency bands - Wavelet transforms
Uncontrolled terms:Egg - Multi-level detection - Response signal - Singularity feature - Indicator values - Standard values - Wavelet transform modulus maximums - Do-mains - Mechanical impacts - Weighted averages - Level schemes - Test results - Recognition ratios - Detection methods - Pulse responses - Dynamic resonances
Ei classification codes:408.1 Structural Design, General - 421 Strength of Building Materials; Mechanical Properties - 703.1 Electric Networks - 716.3 Radio Systems and Equipment - 716.4 Television Systems and Equipment - 731.1 Control Systems - 913.3.1 Inspection - 921.3 Mathematical Transformations
Database:Compendex
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41.Accession number:090311865128
Title:Application of ajax in the agricultural mechanization information network
Authors:Meng, Qingrui; Tian, Zhaofeng; Yan, Chuliang
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 12
Issue date:December 2008
Publication year:2008
Pages:p 132-135
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 meet the demands of improving users' experience and accessing efficiency, an Ajax application model was adopted to process request/response asynchronously and optimize agricultural mechanization information platform based on MVC pattern. The information query subsystem was taken as an example, the design and implementation of reducing the load of Web server by idle client resources and improving the Web application efficiently was introduced, which was based on the combination of Ajax and J2EE. As a result, it brought more friendly use interface and experience.
Number of references:9
Ei main heading:Mechanization
Ei controlled terms:Applications - Information services - Machinery - World Wide Web
Uncontrolled terms:Agricultural mechanization information network - Ajax - Asynchronous - J2EE - Client resources - Sub systems - Information queries - Application models - MVC patterns - WEB applications - Information platforms
Ei classification codes:451.2 Air Pollution Control - 601 Mechanical Design - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications - 903.4 Information Services
Database:Compendex
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42.Accession number:090311865138
Title:Theoretical analysis of lubricating state on all tooth profile of external spur-gear high pressure oil pump
Authors:Li, Yulong; Liu, Kun
Author affiliation:Hefei University, Hefei 230022, 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 12
Issue date:December 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:In order to understand trapped oil pressure and the different numbers of teeth effect on lubricating state on all tooth profile of external spur-gear high pressure oil pump, based on the geometrical relationship of gear transmission, with radius of curvature of driving gear in mesh-point engaged as a variable in a tooth period, all tooth profile was divided into three mating sections and eight especial points and seven courses, the corresponding transient formula of both oil film thickness based on elastohydrodynamic lubrication theory and tooth force were derived, hereby, the accurate position of minimum oil film thickness and maximum tooth force were estimated. Research and all results of an example indicated transient tooth force had a high change in a tooth period, the lubricating state on all tooth profile of external spur-gear high pressure oil pump is boundary lubrication of stiffness with a variable viscosity on the whole, different formula of oil film thickness should be used for different position of all tooth profile, different numbers of teeth have a positive unapparent effect on lubricating state on all tooth. Finally, a conclusion was educed that the gear transmission of external spur-gear high pressure oil pump was indeed different from conventional gear transmission in lubricating state on meshing surface, and the calculation of oil film thickness in external spur-gear pump couldn't directly use the conventional formula for conventional gear transmission.
Number of references:7
Ei main heading:Elastohydrodynamic lubrication
Ei controlled terms:Dentistry - Electric network analysis - Gear teeth - Hydrodynamics - Lubricating oils - Lubrication - Magnetic films - Molecular beam epitaxy - Oil well pumps - Power transmission - Pumps
Uncontrolled terms:Oil film thickness - Oil pump - Trapped pressure - External- - Tooth profiles - Gear transmissions - High pressure oils - Variable viscosities - Boundary lubrications - Radius of curvatures - Oil pressures - Meshing surfaces - Minimum oil film thicknesses - Geometrical relationships - Theoretical analyses
Ei classification codes:461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 462.3 Dental Equipment and Supplies - 511.2 Oil Field Equipment - 601.2 Machine Components - 602.2 Mechanical Transmissions - 607.1 Lubricants - 607.2 Lubrication - 618.2 Pumps - 631.1.1 Liquid Dynamics - 631.2 Hydrodynamics - 703.1.1 Electric Network Analysis - 708.4 Magnetic Materials - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 931.3 Atomic and Molecular Physics - 933.1.2 Crystal Growth
Database:Compendex
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43.Accession number:090311865139
Title:Constraints solving based on solution space in collaborative design
Authors:Chen, Liang; Wu, Xinliang
Author affiliation:Fuzhou University, Fuzhou 350002, 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 12
Issue date:December 2008
Publication year:2008
Pages:p 183-186 126
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 shortages of constraints solving in collaborative design, an interval narrowing algorithm based on constraint bintree was put forward, in which two processes were included, namely the forward interval expanding operation from bottom to root of constraint bintree and the backward interval shrinking operation from root to bottom of constraint bintree. Then a constraint solver has been developed to solve the public solution space of the multi-disciplinary constraints. Using this method can avoid introducing the internal variables and decomposing the constraints into solution functions, improve solving efficiency and easily implement symbol calculation automation.
Number of references:6
Ei main heading:Design
Ei controlled terms:Multi agent systems
Uncontrolled terms:Collaborative design - Conflict detection - Constraint solving - Interval algorithm - Multidisciplinary design
Ei classification codes:408 Structural Design - 723.5 Compute Applications - 902.1 Engineering Graphics
Database:Compendex
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44.Accession number:090311865140
Title:New compensation model of tool nose radius for CNC turning system
Authors:Zhou, Jianlai; Zhang, Nanqiao; Liu, Shuchun
Author affiliation:Huaihai Institute of Technology, Lianyungang 222005, 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 12
Issue date:December 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:For the purpose of improving the accuracy in finish turning taper or free-form surfaces, shortcomings of compensation model of tool nose radius employed in current CNC turning system was analyzed and a new universal model was presented by taking the consideration of geometric figure and size of tool nose, tool wear and meeting condition between the tool and the workpiece. With the needed tool nose radius of compensation in the proposed model, the CNC system could be offered accurate radius compensation in turning process. Since it is impossible to measure the needed tool nose radius of compensation by a measuring implement directly, a reversing measurement was proposed subsequently. Result of experimental tests indicated that the proposed model and surveying method have high accuracy and reliability for radius compensating in finish turning taper or free-form surfaces and the work efficiency could be enhanced effectively.
Number of references:6
Ei main heading:Turning
Ei controlled terms:Control theory - Fuzzy control - Surface measurement
Uncontrolled terms: CNC turning - Measuring - Tool nose radius compensation - Tool wears - High accuracies - Universal models - Experimental tests - Turning processes - Work efficiencies - CNC systems - Work pieces - Short-comings
Ei classification codes:604.2 Machining Operations - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 921 Mathematics - 943.2 Mechanical Variables Measurements
Database:Compendex
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