2008年第39卷第5期共收录43篇

 1.  Accession number:082611336743
Title:Vehicle stability control approach based on virtual reality
Authors:Wu, Shaobin; Li, Jianfeng; Gao, Li
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 5
Issue date:May 2008
Publication year:2008
Pages:p 6-9
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing,100083, China
Abstract:A neural network controller for vehicle stability control was developed based on the virtual reality platform. The virtual reality platform was constructed with real vehicle, virtual ground, vehicle dynamics model etc. The neural network approximate model was used to identify vehicle dynamics system and the self-tuning controller was obtained by rearrangement of the neural network object model. The controller was designed to generate additional yaw moment and make the yaw rate tracking the desired trajectory. Vehicle response and its interactions with drivers were investigated and virtual simulations of a vehicle under human avoidance maneuver were conducted on the virtual reality platform. The simulated results showed that the vehicle stability controller could improve vehicle handling and stability significantly.
Number of references:5
Ei main heading:Stability
Ei controlled terms:Control equipment  -  Control  -  Dynamic models -  Neural networks  -  Vehicles  -  Virtual reality Uncontrolled terms:Neural network controller  -  Virtual reality
platform  -  Real vehicle  -  Virtual ground  -  Vehicle dynamics model  -  Selftuning controller  -  Virtual simulations  -  Yaw moment  -  Yaw rate tracking  -  Vehicle response   -  Interactions with drivers
Ei classification codes:432 Highway Transportation  -  723.4
Artificial Intelligence  -  731.4 System Stability  -  732.1 Control
Equipment  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 2.  Accession number:082611336744
Title:Dynamical model and characteristics analysis of air spring
Authors:Zheng, Mingjun; Chen, Xiaokai; Lin, Yi
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 5
Issue date:May 2008
Publication year:2008
Pages:p 10-14
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The vertical stiffness, frequency and damp characteristic of air spring all have direct influence on the performance of vibration isolation. Two dynamical models of air spring with (and
without) auxiliary chamber were established respectively based on the theory of engineering thermodynamics. The mathematical expressions of stiffness and frequency were deduced and main factors of determining air spring characteristics were analyzed subsequently. The results of this study showed that air spring has apparent nonlinear characteristic. The frequency keeps constant approximately whereas load of air spring supporting is changed largely. Working pressure, change rate of effective area, working volume, working conditions and diameter of the throttle hole are the
main influencing factors on the performance of air spring.
Number of references:7
Ei main heading:Springs (components)
Ei controlled terms:Damping  -  Dynamic models  -  Pressure  - Stiffness  -  Thermodynamics  -  Vibrations (mechanical)
Uncontrolled terms:Air spring  -  Stiffness characteristic  - Frequency characteristic  -  Influencing factor  -  Vibration isolation  -  Auxiliary chamber  -  Change rate  -  Effective area -  Working volume  -  Working conditions   -  Diameter  -  Throttle hole
Ei classification codes:421 Strength of Building Materials;
Mechanical Properties  -  601.2 Machine Components  -  641.1
Thermodynamics  -  921 Mathematics  -  931.1 Mechanics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc
Full-text and Local Holdings Links
FULL TEXT LINKS

 3.  Accession number:082611336745
Title:Design and test of permanent magnet clutch using magnetic force transmission
Authors:Liu, Xuehong; Liu, Liang; Chang, Siqin
Author affiliation:Nanjing University of Science and Technology,
Nanjing 210094, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 15-17 14
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Based on magnetic force transmission principle, a type of the permanent magnet clutch was proposed. The coupling or separating of the clutch was realized by changing the relative position of the parts for the variation of the radical magnetic field strength. The magnetic field and performances of the permanent magnet clutch in coupling state, and the variation of the transmitted torque and axial force in coupling or separating process, were calculated with finite element method, respectively. Finally, the feasibility of the design and influences of the main design parameters on the performance were analyzed, and a prototype of the permanent magnet clutch was manufactured for testing.
Number of references:5
Ei main heading:Clutches
Ei controlled terms:Calculations  -  Couplings  -  Design  -  Finite element method  -  Magnetic fields  -  Permanent magnets  - Separation  -  Testing
Uncontrolled terms:Magnetic force transmission  -  Transmitted torque  -  Axial force
Ei classification codes:422.2 Test Methods  -  602.2 Mechanical
Transmissions  -  701.2 Magnetism: Basic Concepts and Phenomena  -
704.1 Electric Components  -  921.6 Numerical Methods
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 4.  Accession number:082611339327
Title:Change of surface hardness for vehicle component after strengthening under low-amplitude loads
Authors:Lu, Xi; Zheng, Songlin
Author affiliation:University of Shanghai for Science and Technology, Shanghai 200093, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 182-185
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The change and reason of surface hardness were investigated for vehicle components, which include the front axle without surface strengthened process and the transmission gear with surface strengthened process, after strengthening under low amplitude load. The experimental results show that the variation is almost direct ratio to strength and hardness of the front axle after strengthening under low-amplitude loads, but it is inverse ratio for the transmission gear. The main reason of surface hardness variation of vehicle components is that the micro-structure is strengthened and improved. For the surface hardness variation of vehicle components, the strengthening and fatigue damage exhibit the same effect.
Number of references:9
Ei main heading:Fatigue damage
Ei controlled terms:Axles  -  Gears  -  Hardness  -  Machine components  -  Microstructure  -  Strengthening (metal)  -  Surfaces -  Vehicles
Uncontrolled terms:Vehicle component  -  Low amplitude loads  - Front axle  -  Transmission gear
Ei classification codes:421 Strength of Building Materials;
Mechanical Properties  -  432 Highway Transportation  -  531.2
Metallography  -  601.2 Machine Components  -  662.4 Automobile and
Smaller Vehicle Components
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 5.  Accession number:082611336746
Title:Analysis on combustion noise of biogas diesel dual-fuel engine
Authors:Yuan, Yinnan; Luo, Fuqiang; Liang, Yu; Wang, Xiaoyong; Tang, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 18-21 25
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Biogas is made from many kinds of agricultural and forestry residues by a gasifier. It may be used as the main fuel of the biogas diesel dual-fuel engine ignited by diesel fuel. The dual-fuel
engine was rebuilt by a single cylinder, four-stroke, water cooled and direct injection diesel engine. The biogas was induced to the cylinder through intake tube of the engine during intake process. The combustion noise of the biogas diesel dual-fuel engine was calculated and analyzed based on the measured cylinder pressure. The combustion noise of the biogas diesel dual-fuel engine is lower than diesel engine except at low speed and high load. The combustion noise of biogas diesel dual-fuel engine increases with the increasing of load and fuel supply advance angle and decreases with the increasing of speed.
Number of references:7
Ei main heading:Acoustic noise
Ei controlled terms:Biogas  -  Combustion  -  Diesel engines  - Diesel fuels  -  Dual fuel engines  -  Engine cylinders  -  Loads (forces)  -  Pressure
Uncontrolled terms:Combustion noise  -  Forestry residues  - Agricultural residues  -  Fuel supply advance angle
Ei classification codes:521.1 Fuel Combustion  -  522 Gas Fuels  - 612.1 Internal Combustion Engines, General  -  612.2 Diesel Engines -  751.4 Acoustic Noise  -  931.1 Mechanics
Treatment:Applications (APP); Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc
Full-text and Local Holdings Links
FULL TEXT LINKS

 6.  Accession number:082611336747
Title:Experiment on the knock control of HCCI engine by CO2 at high loads
Authors:He, Chao; Ji, Changwei; He, Hong
Author affiliation:Beijing University of Technology, Beijing 100022, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 22-25
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:HCCI engine is prone to have a knock at high loads limiting its power output. In order to control its knock at high loads, a CO2 apparatus was installed to verify the feasibility of ingesting CO2 into the intake to appease engine knock on an engine bench. HCCI combustion tests were conducted on the fourth cylinder of a modified 4-cylinder diesel engine. The experimental results indicated that under steady engine speed of 1400 r/min and fixed fueling rate, high volume fraction of CO2 can decrease the peak values of HCCI combustion cylinder pressures and heat release rates gradually, increase causing combustion duration, ease engine knock and enlarge the operating range at high loads effectively. However, the probability of engine misfire increases with the increase of the volume fraction. For the tradeoff of knock and misfire, the volume fraction of CO2 should be about 1%.
Number of references:14
Ei main heading:Combustion knock
Ei controlled terms:Carbon dioxide  -  Diesel engines  -  Engine cylinders  -  Loads (forces)  -  Pressure  -  Volume fraction
Uncontrolled terms:Homogeneous charge compression ignition (HCCI)  - High load  -  Peak values  -  Heat release rates  -  Engine knock -  Operating range
Ei classification codes:612.1 Internal Combustion Engines, General -  641.1 Thermodynamics  -  804.2 Inorganic Compounds  -  931.1 Mechanics
Treatment:Applications (APP); Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 7.  Accession number:082611336748
Title:Parameter tuning of the engine throttle control
Authors:Cheng, Guangwei; Zhou, Zhili; Deng, Chu'nan
Author affiliation:Wuhan University of Technology, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 26-29
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Based on the analysis of the control principle of engine rotary speed, the control of engine throttle by a stepper motor was investigated. The discrete mathematical model optimized by neural
network PID control was established. The simulation of the engine throttle control was carried out by the LabVIEW software. The simulated results showed that the excess of the system was 0.018 and the output error of the stable state was nearly zero. The control method of engine throttle has good dynamic response and robustness.
Number of references:11
Ei main heading:Engines
Ei controlled terms:Computer simulation  -  Control  -  Dynamic response  -  Mathematical models  -  Neural networks  -  Robustness (control systems)  -  Stepping motors
Uncontrolled terms:Throttle control  -  Parameter tuning  - Proportional integral differential control  -  Back propagation neural network
Ei classification codes:612 Engines  -  705.3 Electric Motors  - 723.5 Computer Applications  -  731 Automatic Control Principles and
Applications  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 8.  Accession number:082611336749
Title:Effects of sequential turbocharging system on performances of D6114 diesel engine
Authors:Zhang, Zhe; Wang, Xibo; Deng, Kangyao
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 5
Issue date:May 2008
Publication year:2008
Pages:p 30-35
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Experiments on sequential turbocharging system used on D6114 diesel engine were investigated. The brake specific fuel consumption and smoke emission of diesel engine were measured in four schemes: with the original turbocharger, with a small turbocharger, with a big turbocharger, with both small and big turbochargers. Then, a new turbocharging method named big and small turbo sequential turbocharging system was put forward by analyzing and comparing the experimental results. When the engine works at low speeds, only the small turbocharger works. Then, at the medium and high speed operation, both the big and the small turbochargers work in parallel. The experimental results showed that the brake specific fuel consumption was reduced about 30g/(kW·h) and the maximum decreased value of smoke emission was approximately 22% in low engine speed range. It was proved that the sequential turbocharging system can improve the performances of the vehicle diesel engine evidently.
Number of references:12
Ei main heading:Superchargers
Ei controlled terms:Diesel engines  -  Fuel consumption  -  Gas emissions  -  Measurements  -  Smoke  -  Speed
Uncontrolled terms:Sequential turbocharging system  -  Performance -  Specific fuel consumption  -  Smoke emission  -  Original turbocharger  -  Small turbocharger  -  Big turbocharger
Ei classification codes:451.1 Air Pollution Sources  -  525.3 Energy
Utilization  -  612.1.1 Internal Combustion Engine Components  -
612.2 Diesel Engines  -  931.1 Mechanics
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 9.  Accession number:082611336750
Title:Prediction of sprinkler nozzle range based on L-M optimized algorithm
Authors:Wang, Bolei; Ma, Xiaoyi; Hao, Jingjing
Author affiliation:North-West A and F University, Yangling 712100, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 5
Issue date:May 2008
Publication year:2008
Pages:p 36-40 35
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Sprinkler nozzle range is affected by many factors which interact with each other and are complex multi-variable and non-linearity systems. The artificial neural network can describe the indefinite multi-input and multi-output features of non-linearity model effectively. However, the training of artificial neural network is a complex problem by conventional back-propagation (BP) optimal algorithm, which has intrinsic weakness in slow convergence and local minimization. A prediction model for the sprinkler nozzle range was developed using Levengerg-Marquardt optimal algorithm, and the nonlinear model among the sprinkler nozzle diameter, nozzle elevation and working pressure was established. Subsequently, the relationships of nozzle range and its influence factors were simulated by Matlab. The results showed that L-M optimal algorithm is more effective and accurate than BP optimal algorithm, and it can be applied for prediction of sprinkler range.
Number of references:10
Ei main heading:Sprinkler systems (irrigation)
Ei controlled terms:Algorithms  -  Computer simulation  - Forecasting  -  MATLAB  -  Neural networks  -  Nonlinear systems
Uncontrolled terms:Sprinkler range  -  Prediction  -  Back propagation (BP) optimal algorithm  -  Levengerg Marquardt optimal algorithm  -  Nonlinear model  -  Sprinkler nozzle diameter  - Nozzle elevation  -  Working pressure
Ei classification codes:723.4 Artificial Intelligence  -  723.5
Computer Applications  -  821.1 Agricultural Machinery and Equipment
-  912.2 Management  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 10.  Accession number:082611336751
Title:Experimental study on micro fluidic sprinkler
Authors:Li, Hong; Liu, Meng; Yang, Yancai; Zheng, Ying
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 5
Issue date:May 2008
Publication year:2008
Pages:p 41-44
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 irrigation level, a long-range micro fluidic sprinkler was designed by adopting wall-attachment offset jet theory. The relation between rotating driving force and size of
fluidic component was analyzed, and calculation formulas of two kinds of driving forces were obtained. According to the fastest rotating speed and largest range, the best geometrical size was achieved by orthogonal methodology. Hydraulic performance of the micro sprinkler was tested, and the test results were coincident with the orthogonal test results. The water distribution of the micro fluidic sprinkler is uniform, and its long range and small water drop size can meet the design requirements.
Number of references:8
Ei main heading:Sprinkler systems (irrigation)
Ei controlled terms:Design  -  Irrigation  -  Microfluidics  - Testing
Uncontrolled terms:Micro fluidic sprinkler  -  Hydraulic performance -  Orthogonal test  -  Wall attachment offset jet theory  - Rotating driving force  -  Fluidic component  -  Geometrical size  - Water distribution  -  Small water drop size
Ei classification codes:408 Structural Design  -  422.2 Test Methods -  632.5.1 Microfluidics  -  821.1 Agricultural Machinery and Equipment  -  821.3 Agricultural Methods
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 11.  Accession number:082611336752
Title:Kinematic analysis and experiment of backward rotary transplanting mechanism with elliptical gears transmission
Authors:Yu, Gaohong; Xie, Renhua; Zhao, Yun
Author affiliation:Zhejiang Sci.-Technol. University, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 45-48 29
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Backward crank-rocker transplanting mechanism used in walking-type rice transplanter vibrates seriously when operating. A new transplanting mechanism for walking-type rice transplanter was designed, and it worked steadily and vibrated slightly. Firstly, the work principle and structural feature of the mechanism were analyzed and the kinematic model of the mechanism was established. Secondly, the software of mechanism aided analysis and parameters optimization
was developed and the structural parameters were optimized to satisfy the work requirement of walking-type rice transplanter. Lastly, its kinematic characteristics were tested by high speed digital video camera and image processing technique.
Number of references:6
Ei main heading:Agricultural machinery
Ei controlled terms:Agricultural implements  -  Computer software  - Gears  -  Kinematics  -  Mechanisms  -  Optimization  -  Testing  - Transmissions  -  Video cameras
Uncontrolled terms:Rice transplanter  -  Rotary transplanting mechanism  -  Elliptical gears transmission  -  Kinematic characteristics  -  Structural feature  -  Kinematic model  -
Parameters optimization
Ei classification codes:601.2 Machine Components  -  601.3
Mechanisms  -  602.2 Mechanical Transmissions  -  723 Computer
Software, Data Handling and Applications  -  821.1 Agricultural
Machinery and Equipment  -  921.5 Optimization Techniques
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 12.  Accession number:082611336754
Title:High-speed photography analysis on process of threshing of axial flow threshing and separating installation
Authors:Yi, Shujuan; Jiang, Enchen
Author affiliation:Heilongjiang August First Land Reclamation University, Daqing 163319, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 52-55
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The process of threshing of paddy and motion manner of threshed kernels by the assembled of plank-tooth and helical vanes of axial flow threshing and separating installation was photographed on line by the high-speed photography. By observing and analyzing the reproduction of the pictures of photographed the kernels were separated from the branch with stripping, impacting, compacting, colliding by the threshing units and rubbing of the material. The rice panicle was in ring form during the threshing period and the kernels scattered from center about the ring. The paddy came into being the thin layer rapidly, rotated and surged ahead under the joint action of the threshing parts and the guide blades as they entered the threshing space. The paddy layer was compressed instantly as it subjected stripping and rubbing and was thrown away assuming a fluffy state soon after. It made the threshed kernels ave the chance to separate from the fluffy stalk layer.
Number of references:9
Ei main heading:Combines
Ei controlled terms:Axial flow  -  Harvesting  -  High speed photography  -  Separation
Uncontrolled terms:Paddy  -  Axial flow threshing  -  Separating installation  -  Motion manner  -  Threshed kernels  -  Plank tooth -  Helical vanes
Ei classification codes:631.1 Fluid Flow, General  -  742.1
Photography  -  821.1 Agricultural Machinery and Equipment  -  821.3
Agricultural Methods
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 13.  Accession number:082611336753
Title:Constant load PID-control of threshing cylinder in combine
Authors:Lu, Wentao; Zhang, Dongxing; Deng, Zhigang
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 5
Issue date:May 2008
Publication year:2008
Pages:p 49-51 55
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The pressure of hydraulic cylinder, driving the infinite variable speed assemble of threshing cylinder, was used to indicate threshing cylinder load, and the function between the pressure and threshing cylinder torque was concluded by analyzing the force of the infinite variable speed belt pulley in the threshing cylinder. The relation between threshing cylinder load and feed rate was analyzed and the dynamic model of threshing cylinder was built. Based on that, the threshing cylinder load PID-control system was set up and simulated in Matlab. The simulation results proved the effectiveness and practicability of this control system.
Number of references:9
Ei main heading:Harvesters
Ei controlled terms:Computer simulation  -  Control systems  - Cylinders (shapes)  -  Dynamic models  -  Loads (forces)  -  MATLAB -  Pressure  -  Torque
Uncontrolled terms:Threshing cylinder  -  Combine harvester  -  Feed rate  -  Proportional integral differential control system
Ei classification codes:408 Structural Design  -  723.5 Computer
Applications  -  731.1 Control Systems  -  821.1 Agricultural
Machinery and Equipment  -  931.1 Mechanics  -  931.2 Physical
Properties of Gases, Liquids and Solids
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 14.  Accession number:082611336755
Title:Evaluation for development effect of agricultural mechanization based on method of global osculating value
Authors:Lu, Bingfu; Zhang, Zuli; Zhu, Ming; Chen, Zhuojun; Lu,Xiaolian
Author affiliation:Shenyang Agricultural University, Shenyang 110161, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 56-59
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A evaluation index system of ICOE was set up for development effect of agricultural mechanization, and global method of osculating value was applied to evaluate development effect of agricultural mechanization in every province of China according to the evaluation results, the development effects were divided into 3 grades of A, B and C. The change reasons of agricultural
mechanization development effect in 2004 and 2006 were analyzed finally.
Number of references:6
Ei main heading:Mechanization
Ei controlled terms:Agricultural engineering  -  Agriculture  - Economic and social effects  -  Estimation
Uncontrolled terms:Osculating value  -  Development effect  - Evaluation  -  Input  -  Output  -  Carrier  -  Environment  - China
Ei classification codes:601 Mechanical Design  -  821 Agricultural
Equipment and Methods; Vegetation and Pest Control  -  901.4 Impact of Technology on Society  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 15.  Accession number:082611336756
Title:Combinatorial forecast of agricultural machinery total power based on shapley value
Authors:Zhang, Shujuan; Zhao, Fei
Author affiliation:Shanxi Agricultural University, Taigu 030801, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 60-64
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A combinatorial model was established to forecast the total power of agricultural machinery in Shanxi province. Applying the Shapley value method of cooperative game, the weight of each forecast model in the combinatorial forecast model, was determined by distributing the total combinatorial error. The results showed that the forecast average error of combinatorial forecast model is 1.81, which is lower than 3.12, 2.42 and 2.23 of one-variable liner regression model, cubic exponent smooth model and BP neural network model, and is also lower than 1.88 and 1.90 of the combinatorial forecast model based on the variance reciprocal method and the divergence coefficient method.
Number of references:8
Ei main heading:Agricultural machinery
Ei controlled terms:Errors  -  Forecasting  -  Mathematical models -  Neural networks
Uncontrolled terms:Total power  -  Shapley value  -  Combinatorial forecast  -  Average error  -  One variable liner regression model -  Cubic exponent smooth model  -  Back propagation neural network model
Ei classification codes:723.4 Artificial Intelligence  -  821.1 Agricultural Machinery and Equipment  -  912.2 Management  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 16.  Accession number:082611336757
Title:Measurement of the eutectic point and melting point of the freeze-dried materials based on electric resistance method
Authors:Cui, Qingliang; Guo, Yuming; Cheng, Zhengwei
Author affiliation:Shanxi Agricultural University, Taigu 030801, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 65-69
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The alternating current circuit metering equipment was designed based on the conductivity principle of material. The eutectic points and the melting points of some agricultural
products, such as fruit, vegetable, eggs, meats, etc., were measured respectively. After carrying on the cures fitting to the data, the eutectic points and the melting points of agricultural products were
gained precisely according to the physical significance of function curvature. After collecting and reorganizing the related data, the eutectic points and the melting points of about 60 kinds of agricultural products were gained.
Number of references:15
Ei main heading:Agricultural products
Ei controlled terms:Curve fitting  -  Drying  -  Freezing  -  Fruits -  Measurements  -  Meats  -  Melting point
Uncontrolled terms:Electric resistivity method  -  Eutectic point  - Vegetable  -  Eggs
Ei classification codes:642.1 Process Heating  -  644.1 Refrigeration Methods  -  821.4 Agricultural Products  -  822.3 Food Products  -  921.6 Numerical Methods  -  931.2 Physical Properties of Gases, Liquids and Solids
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 17.  Accession number:082611336758
Title:Experimental investigation on simultaneous dry-blanching and dehydration of apple slice under infrared heating
Authors:Lin, Yaling; Li, Shujun; Pan, Zhongli
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 5
Issue date:May 2008
Publication year:2008
Pages:p 70-73
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Using gas catalytic infrared heater, the experiment was performed under three kinds of thicknesses 5, 9, 13 mm apple slices and three kinds of infrared intensities 3, 4, 5 kW/m2. The
experimental results showed that the dry-blanching and dehydration processes of apple slice could be completed in one step using the catalytic infrared technology. Owing to the penetration and
selectivity of the infrared heating, the catalytic infrared technology has shorter blanching time and higher energy efficiency comparing with those steam and hot water blanching methods. The energy efficiency of this method is above 40%, which is higher than that 3%-8% of the traditional methods.
Number of references:8
Ei main heading:Dehydration
Ei controlled terms:Drying  -  Energy efficiency  -  Experiments  - Fruits  -  Infrared heating
Uncontrolled terms:Apple slice  -  Blanching time  -  Catalytic infrared technology
Ei classification codes:525.2 Energy Conservation  -  642.1 Process Heating  -  802.3 Chemical Operations  -  821.4 Agricultural Products
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 18.  Accession number:082611336759
Title:Experiment and optimization on preparation of biodiesel from sunflower seed oil by supercritical methanol method
Authors:Li, Yuzhu; Yu, Haiye; Niu, Xutang; Shen, Li; Sui, Yuanyuan
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 5
Issue date:May 2008
Publication year:2008
Pages:p 74-76 85
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Biodiesel, a renewable alternative bio-fuel, can be made from fatty acid and methanol in transesterification. The biodiesel was obtained from sunflower seed oil in autoclave by supercritical
methanol method. Analyzed by GC-MS, the main components of the biodiesel are fatty acid methyl esters, which are listed as follow by the peak sequence: palmitic acid methyl ester, linoleic acid methyl ester, oleic acid methyl ester, stearic acid methyl ester, linolenic acid methyl ester. The optimal reaction conditions were studied by four factors and three levels orthogonal design, which
are listed as follow by the intensity of influence factor from high to low: reaction temperature is 340°C, reaction pressure is 15 MPa, molar ratio of methanol to sunflower seed oil is 42, and reaction time is 20 min.
Number of references:5
Ei main heading:Biodiesel
Ei controlled terms:Chemical reactions  -  Methanol  -  Optimization -  Pressure  -  Temperature
Uncontrolled terms:Supercritical methanol method  -  Sunflower seed oil  -  Preparation  -  Molar ratio of methanol to sunflower seed oil
Ei classification codes:523 Liquid Fuels  -  641.1 Thermodynamics  - 802.2 Chemical Reactions  -  921.5 Optimization Techniques  - 931.1 Mechanics
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 19.  Accession number:082611336760
Title:Technology optimization on extraction pomegranate seed oil using organic solvent assisted by ultrasound
Authors:Gao, Zhenpeng; Yue, Tianli; Yuan, Yahong; Wang, Yunyang; Yan, Junjun
Author affiliation:Northwest A and F University, Yangling 712100, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 5
Issue date:May 2008
Publication year:2008
Pages:p 77-80
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:For improving the yield of pomegranate seed oil, an extraction technology using ultrasound and organic solvent method for pomegranate seed oil was proposed. On the basis of single-factor experiments, the optimal extraction conditions were studied with the orthogonal experiments. The experimental results showed that the pomegranate seed oil yield is 23.84% on the optimal extracting conditions, which are liquid-solid ratio 12 mL/g, ultrasonic power 225 W, ultrasonic treatment time 15 min and ultrasonic treatment temperature 50°C.
Number of references:6
Ei main heading:Extraction
Ei controlled terms:Oils and fats  -  Optimization  -  Organic solvents  -  Seed  -  Temperature  -  Ultrasonic applications
Uncontrolled terms:Pomegranate seed oil  -  Yield  -  Orthogonal experiments  -  Liquid solid ratio  -  Ultrasonic power  - Ultrasonic treatment time
Ei classification codes:641.1 Thermodynamics  -  753.3 Ultrasonic Applications  -  802.3 Chemical Operations  -  821.4 Agricultural Products  -  822.3 Food Products  -  921.5 Optimization Techniques
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 20.  Accession number:082611336761
Title:Optimization on ultrasound-assisted extraction technology of xanthophylls from corn gluten meal
Authors:Li, Xiuxia; Han, Lujia
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 5
Issue date:May 2008
Publication year:2008
Pages:p 81-85
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Technology for ultrasound-assisted extraction of xanthophylls from corn gluten meal was investigated. Response surface methodology was employed to analyze the effect of ultrasonic time, preliminary temperature and the ratio of liquid to solid on the xanthophylls yield. The optimal technologic parameters for ultrasound-assisted extraction were: ultrasonic time 11 min, primary temperature 25.4°C, and the ratio of liquid to solid 6.4 mL/g. Under the optimization conditions, xanthophylls yield rate was 67.90 μg/g, which was consistent with the predicted value by RSM. Comparing with the traditional extraction methods, the ultrasound-assisted extraction slortened extraction time and the yield rate was increased significatly (p less than or equal 0.05).
Number of references:8
Ei main heading:Extraction
Ei controlled terms:Optimization  -  Technology  -  Temperature  - Ultrasonic applications
Uncontrolled terms:Corn gluten meal  -  Xanthophylls  -  Ultrasound assisted extraction  -  Ultrasonic time  -  Preliminary temperature -  Ratio of liquid to solid  -  Yield rate
Ei classification codes:641.1 Thermodynamics  -  753.3 Ultrasonic Applications  -  802.3 Chemical Operations  -  901 Engineering Profession  -  921.5 Optimization Techniques
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 21.  Accession number:082611336762
Title:Enzymatic modification of concentrated sunflower proteins
Authors:Chen, Jie; Liu, Guoqin; Qiu, Aiyong; Wang, Guanyue
Author affiliation:He'nan University of Technology, Zhengzhou 450052, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 86-90
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Adopting 1.398 Bacillus subtilis neutral proteinase to hydrolyze concentrated sunflower proteins and degrade the proteins molecules, changes of protein sub-unite were analyzed by the method of electrophoresis, and the functional properties of enzymolyzed sunflower proteins and concentrated sunflower proteins with different hydrolytic degrees were studied systematically. The
experimental results showed that the functional properties of enzymolyzed sunflower proteins with hydrolytic degree results showed that the functional properties of enzymolyzed sunflower proteins
with hydrolytic degree of 6.5%, such as solubility, oil absorption property and emulsibility, were improved. Water retention property, frothiness and foam stability of concentrated sunflower proteins were better than that of the hydrolysis of sunflower proteins. Compared with the reference mode of NAS (1980) and FAO (1973), other amino acids had an excellent balance except lysine.
Number of references:7
Ei main heading:Proteins
Ei controlled terms:Chemical modification  -  Degradation  - Electrophoresis  -  Enzymes  -  Molecules  -  Solubility  - Stability
Uncontrolled terms:Sunflower seed  -  Concentrated protein  - Enzymolyzed hydrolysis  -  Functional property  -  Hydrolytic degrees  -  Oil absorption property  -  Emulsibility  -  Water retention property  -  Frothiness  -  Foam stability
Ei classification codes:701.1 Electricity: Basic Concepts and Phenomena  -  801 Chemistry  -  802.2 Chemical Reactions  -  804.1 Organic Compounds
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 22.  Accession number:082611336763
Title:Nondestructive detection of sugar content on navel orange with hyperspectral imaging
Authors:Guo, Enyou; Liu, Muhua; Zhao, Jiewen; Chen, Quansheng
Author affiliation:Jiangxi Agricultural University, Nanchang 330045, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 91-93 103
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Sugar content is an important quality attribute. The feasibility of using hyperspectral imaging for nondestructive detection of sugar content of navel orange was investigated. The spectrum features wavelength for predicting the navel orange's sugar content of the navel orange was obtained via the scatting spectral imaging. Subsquently artificial neural network system was used for developing a prediction model to predict the sugar content of navel orange. Finally, the prediction results were obtained for sugar content with the correlation coefficient of prediction of R=0.831. The results showed that hyperspectral imaging is an effective method for nondestructive assessing the sugar content of navel orange.
Number of references:10
Ei main heading:Sugars
Ei controlled terms:Forecasting  -  Fruits  -  Mathematical models -  Neural networks  -  Nondestructive examination  -  Spectrum analysis
Uncontrolled terms:Sugar content  -  Navel orange  -  Hyperspectral imaging  -  Nondestructive detection  -  Correlation coefficient  - Prediction model
Ei classification codes:422.2 Test Methods  -  723.4 Artificial Intelligence  -  804.1 Organic Compounds  -  821.4 Agricultural Products  -  912.2 Management  -  921 Mathematics
Treatment:Applications (APP); Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 23.  Accession number:082611336764
Title:Technology of constructing virtual plant system including model coupling
Authors:Tang, Weidong; Li, Pingping; Lu, Zhangping
Author affiliation:Jinggangshan University, Ji'an 343009, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 94-98 107
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Considering the correlation between morphological structure and physiological function of plant when building up its developmental model, the simulation model of virtual plant can be founded, and the visualization model of plant morphogenesis can also be established using graphic technology. Finally, the virtual plant system was developed based on model coupling. The presented system was proved in practice by simulating the development processes of reed, which demonstrated its feasibility and validity.
Number of references:8
Ei main heading:Visualization
Ei controlled terms:Computer simulation  -  Data processing  - Graphic methods  -  Plants (botany)  -  Virtual reality
Uncontrolled terms:Virtual plant  -  Model coupling  -  Reed  - Developmental model  -  Graphic technology  -  Development processes
Ei classification codes:461.9 Biology  -  723.2 Data Processing and Image Processing  -  723.5 Computer Applications  -  902.1
Engineering Graphics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 24.  Accession number:082611336765
Title:Automatic acquiring agricultural information based on thematic map
Authors:Wang, Xiufang; Chen, Fei; Nong, Yu; Wang, Kun
Author affiliation:Wuhan University, Wuhan 430079, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 99-103
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 speed up the construction of agricultural information system, a method of automatic acquiring agricultural information from thematic maps was presented. The color feature and morphological feature of symbols were extracted using computer vision and image distance transformation. In this system, the symbol template library was built according to legend firstly, and then the symbols were extracted from the thematic map. Finally, the attribute of symbols were automatic acquired by the in-distance error of symbol skeleton. The experimental results showed that the extraction accuracy and recognition accuracy of point symbols achieved 97% and 93%, and of linear symbols and area symbols achieved 99%.
Number of references:9
Ei main heading:Information systems
Ei controlled terms:Agriculture  -  Computer vision  -  Extraction -  Maps
Uncontrolled terms:Automatic acquiring  -  Agricultural information -  Thematic maps  -  Color feature  -  Morphological feature  - Symbols  -  Image distance transformation  -  Extraction accuracy  - Recognition accuracy
Ei classification codes:405.3 Surveying  -  741.2 Vision  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  - 903.3 Information Retrieval and Use
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 25.  Accession number:082611336766
Title:Soil moisture content sensors placement based on the vertical variety law
Authors:Yang, Shaohui; Wang, Yiming; Sun, Kai
Author affiliation:Jimei University, Xiamen 361021, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 104-107
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A continuous acquisition test for soil moisture content was carried out in a clover field. By the correlation analysis and R-cluster analysis of the soil moisture content data, it was found out that the soil moisture contents at different depths have high linear correlation and the correlation coefficient increases with the shortening of the distance between layers. The soil moisture contents at 8 different depths were sorted by R type hierarchical clustering method, subsequently. The results showed that it was reasonable that soil moisture sensors were embed into 10, 20 and 50 cm for monitoring the soil moisture content of depths 0-100 cm.
Number of references:6
Ei main heading:Soil moisture
Ei controlled terms:Cluster analysis  -  Data acquisition  - Monitoring  -  Sensors
Uncontrolled terms:Soil moisture content  -  Data collection  - Correlation analysis  -  Vertical variety law  -  Clover field  Ei classification codes:483.1 Soils and Soil Mechanics  -  723.2 Data Processing and Image Processing  -  732.2 Control Instrumentation  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 26.  Accession number:082611336767
Title:Prediction for the effect of temperature and water content on the soil specific heat by BP neural network
Authors:Yuan, Qiaoxia
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 5
Issue date:May 2008
Publication year:2008
Pages:p 108-111
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A optimized BP neural network model and a quadratic regression model were developed respectively by conducting a quadratic orthogonal test to evaluate soil specific heat at different soil temperatures and water contents. The results of the quadratic regression model showed the linear functions of soil temperature and water content have impact on soil specific heat in a highly marked level and their square in a significant level. The residual square sum and standard deviation was 0. 0261 and 0. 0511 respectively for the quadratic regression. The optimized BP neural network model had good learning ability and the results were converged after about 346 training iterations. Moreover, the BP neural network model could achieve good agreement between predicted and measured values. The prediction precision was higher for the optimized BP neural network model than that for the quadratic regression model. The results showed that the optimized BP neural network model can be used to forecast the soil specific heat because of its fast calculation rate and convenient operation.
Number of references:10
Ei main heading:Water content
Ei controlled terms:Forecasting  -  Neural networks  -  Soils  - Specific heat  -  Temperature
Uncontrolled terms:Optimized back propagation neural network model -  Quadratic regression model  -  Residual square sum  -  Standard deviation
Ei classification codes:444 Water Resources  -  483.1 Soils and Soil Mechanics  -  641.1 Thermodynamics  -  723.4 Artificial Intelligence -  912.2 Management
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 27.  Accession number:082611336768
Title:Research progress of the farming information collections key technologies on precision agriculture
Authors:Wang, Fenghua; Zhang, Shujuan
Author affiliation:Shanxi Agricultural University, Taigu 030801, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 112-121 111
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:The field information influencing crop growth are collected and described quickly and effectively, which is the important basis to develop fine agricultural practice. With the developing of modern information technology, the field information collecting technology is developing and improving rapidly. According to several kinds of the field information collecting key technologies, including the GPS positioning technology, the advanced sensing technology, the multi-sensor information fusion technology, the wireless communication technology and so on, the research situation of their applications to the field position information, the soil attribute information, the crop growth information, environment information and crop yield information was discussed. The advantages and disadvantages of the above collecting technologies were pointed out respectively. Finally, the research direction of the field information collecting technology in the future is put forward, which is developing the low-cost, multi-channel, high-precision and quick-positioning dynamic field information digital intelligent measuring equipment with various advanced technologies.
Number of references:82
Ei main heading:Information technology
Ei controlled terms:Agriculture  -  Crops  -  Farms  -  Global positioning system  -  Information fusion  -  Reviews  -  Sensors  - Soils  -  Wireless telecommunication systems
Uncontrolled terms:Precision agriculture  -  Farming information collection  -  Field position information  -  Soil attribute information  -  Crop growth information  -  Environment information -  Crop yield information
Ei classification codes:483.1 Soils and Soil Mechanics  -  716.3 Radio Systems and Equipment  -  723.5 Computer Applications  - 732.2 Control Instrumentation  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  903.1 Information Sources and Analysis  -  903.2 Information Dissemination
Treatment:General review (GEN)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 28.  Accession number:082611336769
Title:Multi-objective and flexible job-shop problems study based on hybrid particle swarm optimization
Authors:Liu, Mingzhou; Zhang, Mingwei; Jiang, Zengqiang; Ge, Maogen; Zhang, Mingxin
Author affiliation:Hefei University of Technology, Hefei 230009, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39
Issue:n 5
Issue date:May 2008
Publication year:2008
Pages:p 122-127
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:To solving the localization of typical Job-Shop scheduling problem, an optimization model, which has flexible Job-Shop scheduling problem and takes the time, cost and quality as the
optimization objectives, was proposed. The calculating method of optimization objectives was given, a hybrid particle swarm optimization was designed and the detail process of realization with
this algorithm was presented. In the optimization model, a quantitative approach is used to the quality related objectives via the process capacity index, and the method of comprehensive evaluation linear weighted model is proposed to solve the problem of choosing weights in flexible Job-Shop scheduling algorithm and make the decision-maker choose the preferred solution of optimization objectives according to the facts. Finally, the validity of the scheduling structure and algorithm was verified by a case of Job-Shop scheduling.
Number of references:7
Ei main heading:Scheduling
Ei controlled terms:Algorithms  -  Calculations  -  Costs  - Machine shops  -  Multiobjective optimization  -  Optimization  - Production  -  Quality assurance
Uncontrolled terms:Flexile Job Shop scheduling  -  Hybrid particle swarm  -  Quality related objectives  -  Process capacity index
Ei classification codes:604.2 Machining Operations  -  911 Cost and Value Engineering; Industrial Economics  -  912.2 Management  - 913.1 Production Engineering  -  913.3 Quality Assurance and Control -  921.5 Optimization Techniques
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 29.  Accession number:082611336770
Title:Evidence theory-based method and algorithm for calculation of reliability
Authors:Guo, Huixin; Hu, Guanyu; Tan, Feng
Author affiliation:Changsha University, Changsha 410003, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 128-132
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A method of approximate reliability calculation was introduced based on evidence reasoning. F was defined as an event of structure failure. The belief measure of F(Bel(F)) and the
plausibility measure of F(pl(F)) were calculated using evidence theory. [Bel(F), pl(F)] was used as the interval estimation of failure probability. The distributing domains of n random variables in performance function of engineering structure were respectively split into k intervals. The average of Bel(F) and pl(F) could be considered as the approximate estimation of failure probability. A numerical algorithm for realizing the introduced method was investigated and its calculation steps were presented. The key influencing factors on the evaluation precision and calculation efficiency were illuminated subsequently. The greater the k is, the more precise the calculated failure probability is, and the calculation efficiency decreases with the increasing of k and n. Finally, a program for realizing this algorithm was developed and two examples were presented to demonstrate the validity of the introduced method.
Number of references:10
Ei main heading:Reliability
Ei controlled terms:Algorithms  -  Calculations  -  Failure (mechanical)  -  Machine components  -  Mathematical models  - Probability
Uncontrolled terms:Evidence theory  -  Approximate reliability calculation  -  Numerical algorithm
Ei classification codes:421 Strength of Building Materials;
Mechanical Properties  -  601.2 Machine Components  -  913.3 Quality
Assurance and Control  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 30.  Accession number:082611336771
Title:Hyper-chaotic mathematical programming method and its application to mechanism synthesis of parallel robot
Authors:Luo, Youxin
Author affiliation:Hu'nan University of Arts and Science, Changde 415000, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 133-136 132
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:With the Newton and quasi-Newton methods, only one solution of the nonlinear equations set is found and sometimes no solution is found when the iteration diverges. Combining mathematical programming method with hyper-chaotic system, a hyper-chaotic mathematical programming method was proposed to obtain locate initial points and find all real solutions of the nonlinear equations set based on utilizing hyper-chaotic discrete system. The numerical example in 6 _ SPS parallel robot mechanism synthesis showed that all solutions could quickly obtain, and the correctness and validity of the proposed method was proved.
Number of references:22
Ei main heading:Mathematical programming
Ei controlled terms:Chaotic systems  -  Industrial robots  - Mechanisms  -  Nonlinear equations
Uncontrolled terms:Stewart platform  -  Nonlinear equations set  - Hyperchaotic system  -  6 SPS mechanism  -  Parallel robot
Ei classification codes:601.3 Mechanisms  -  723.1 Computer Programming  -  731.6 Robot Applications  -  921.1 Algebra  -  961 Systems Science
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 31.  Accession number:082611336772
Title:Multi-branch tree expression and kinematic analysis of planar linkage mechanism
Authors:Luo, Xianhai; Weng, Haishan
Author affiliation:University of Science and Technology Beijing, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 137-141
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A method was proposed to express a planar linkage structure by multi-branch tree data. The analysis-program of mechanism position is regarded as the function of nodes calculation. An
ordered set of kinematic numerical analysis program of planar linkage mechanism is built by postorder-traversal operation of the tree. It can realize automatic kinematic analysis of the mechanism by calling the set orderly. This method avoids the discernment of Assur groups and motion-routes creation. The new trees can be derived conveniently by crossing the nodes of two known trees or mutating the nodes of a known tree. Accordingly, it provides a convenient method for configuration creative design and kinematic analysis of a planar linkage. Finally, the kinematic analysis demonstration proved that the method was effective.
Number of references:7
Ei main heading:Mechanisms
Ei controlled terms:Computer software  -  Design  -  Kinematics  - Numerical analysis
Uncontrolled terms:Planar linkage mechanism  -  Multibranch tree  - Kinematic analysis  -  Configuration creative design
Ei classification codes:601.3 Mechanisms  -  723 Computer Software, Data Handling and Applications  -  921.6 Numerical Methods  -  931.1 Mechanics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 32.  Accession number:082611336773
Title:Improving on method of pseudo-rigid-body model of lumped complete compliant mechanism
Authors:Qiu, Lifang; Weng, Haishan; Liu, Lin; Nan, Tieling
Author affiliation:University of Science and Technology Beijing, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 142-145
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A four-bar flexure hinge mechanism was analyzed with pseudo-rigid-body model method. Based on this, the elasticity of the link of the four-bar flexure hinge mechanism was taken into account and the equation was given. The calculation of an example of the four-bar flexure hinge mechanism was carried out with this method, subsequently. The example was modeled with finite element method, and then was simulated by ANSYS. Finally, the results were discussed and compared, and the validity of this analysis method was proved.
Number of references:9
Ei main heading:Mechanisms
Ei controlled terms:Calculations  -  Computer simulation  -  Finite element method  -  Flexible structures  -  Hinges
Uncontrolled terms:Four bar flexure hinge mechanism  -  Pseudorigid body model  -  Complete compliant mechanism  -  Elasticity distortion
Ei classification codes:408.2 Structural Members and Shapes  - 601.3 Mechanisms  -  723.5 Computer Applications  -  921.6 Numerical Methods
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 33.  Accession number:082611336774
Title:Workspace resolution and dimensional synthesis on delta parallel mechanism
Authors:Gao, Xiulan; Lu, Kaijiang; Wang, Juanping
Author affiliation:Baoji University of Arts and Sciences, Baoji 721007, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 146-149 145
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:A method of workspace resolution and dimensional synthesis on Delta parallel mechanisms was presented. The resolution expression of the single-open-chain sub-space boundary surface and the reachable workspace of the Delta parallel mechanism were obtained based on curve envelope theory. Then the maximal inscribed spheroid contained in workspace was educed, and the relationship between its position and the dimensions was established. Taking the spheroid as the design space and using the universal average value of Jacobian matrices condition number in design space as mechanism performance index for dimensional synthesis, the optimal dimensions
for the Delta parallel mechanism were obtained lastly.
Number of references:6
Ei main heading:Mechanisms
Ei controlled terms:Design  -  Kinetics  -  Optimization  - Structures (built objects)
Uncontrolled terms:Delta parallel mechanism  -  Workspace resolution -  Dimensional synthesis  -  Maximal inscribed spheroid  - Position  -  Dimensions
Ei classification codes:408 Structural Design  -  601.3 Mechanisms -  921.5 Optimization Techniques
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 34.  Accession number:082611336775
Title:Design and simulation of 3-PUU parallel mechanism vibration platform
Authors:Zhong, Donghua; Ma, Luzhong; Xu, Zihong; Liu, Jianmin
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 5
Issue date:May 2008
Publication year:2008
Pages:p 150-154
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing,100083, China
Abstract:According to the structural theory of parallel robot mechanism, a 3-DOF translational parallel mechanism with 3-PUU joint structure was investigated by the single-opened-chain unit approach. Firstly, the structural characteristics analysis for the parallel mechanism was elaborated, including mobility analysis, motion output analysis and structure complexity analysis. The forward and inverse kinematics resolutions were obtained respectively. Secondly, the virtual prototype was built through Mechanical/Pro with Pro/E and ADAMS. Finally, the simulations on kinematics and dynamic performance were carried out in ADAMS. The simulated results showed that the design parallel mechanical vibration platform is feasible.
Number of references:8
Ei main heading:Test facilities
Ei controlled terms:Computer simulation  -  Degrees of freedom (mechanics)  -  Inverse kinematics  -  Kinematics  -  Mechanisms  - Vibrations (mechanical)
Uncontrolled terms:Parallel mechanical vibration platform  - Parallel mechanism  -  Virtual prototype  -  Mobility analysis  - Motion output analysis  -  Structure complexity analysis  -
Position analysis  -  3 PUU joint structure
Ei classification codes:423.1 Test Equipment  -  601.3 Mechanisms  - 723.5 Computer Applications  -  931.1 Mechanics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 35.  Accession number:082611336776
Title:Modeling and simulation on virtual prototype of novel five-axis parallel machine tool
Authors:Chen, Xiulong; Deng, Yu; Zhao, Yongsheng
Author affiliation:Shandong University of Science and Technology, Qingdao 266510, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 155-159
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 verify the design scheme and theoretical model of the parallel machine tool (PMT), reduce the period of the PMT development, and enhance the ratio of its successful design, the virtual prototype technology was applied to the course of the PMT design and development. The virtual prototype of this PMT was established via the mechanical design software SolidWorks. NC machining, visual verification of tool path and changing cutter and rough automatically in simulation-system were realized by applying OLE technology, and the dynamic analysis and simulation were achieved by the multi-body system simulation software MSC. ADAMS. The computer simulation results show that the theoretical model is correct and the design structure is credible.
Number of references:7
Ei main heading:Machine tools
Ei controlled terms:Computer control  -  Computer simulation  - Computer software  -  Dynamic analysis  -  Machining  -  Structural design
Uncontrolled terms:Five axis parallel machine tool  -  Virtual prototype  -  Software SolidWorks  -  NC machining  -  Visual verification  -  Tool path  -  Changing cutter  -  Rough automatically  -  OLE technology
Ei classification codes:408.1 Structural Design, General  -  422.2 Test Methods  -  603.1 Machine Tools, General  -  604.2 Machining Operations  -  723.5 Computer Applications
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 36.  Accession number:082611336777
Title:UG/CAM -based post-processing method of hybrid machine tools
Authors:Liu, Hongyan; Huang, Yumei; Gao, Feng; Shi, Wenhao; Cheng, Xiang
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 5
Issue date:May 2008
Publication year:2008
Pages:p 160-164
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 problem that the general cutter-location post-processing system can not generate the NC instruction for hybrid machine tools, we developed a post-processing system for the structure of hybrid machine tools. Firstly, the cutter location data of part was created by using UG/CAM software. And then the position and control for orientation data of cutter was transformed to the control instruction for the actuated axis by post-processing, which includes quadratic interpolation, the inverse kinematics equations of position and orientation, spatial tool
radius compensation and interference detection. Finally, the position and orientation of the cutter in machining was realized. The computer simulation results of a 3-D free surface machining
indicated that the post-processing method is correct and efficient.
Number of references:6
Ei main heading:Machine tools
Ei controlled terms:Computer simulation  -  Computer software  - Control  -  Inverse kinematics  -  Machining
Uncontrolled terms:Hybrid machine tools  -  Post processing  - Cutter location data  -  Software UG  -  Software CAM  -  Quadratic interpolation  -  Inverse kinematics equations  -  Position  - Orientation  -  Tool radius compensation   -  Interference detection
-  3D free surface machining
Ei classification codes:603.1 Machine Tools, General  -  604.2 Machining Operations  -  723.5 Computer Applications  -  731 Automatic Control Principles and Applications  -  931.1 Mechanics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 37.  Accession number:082611336778
Title:Analysis on power flow of co-axial counter-rotating reducer
Authors:Shi, Wankai; Zhang, Qingwei; Qin, Datong
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 5
Issue date:May 2008
Publication year:2008
Pages:p 165-168
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 obtain a counter-rotating reducer with high speed, closed epicyclic gear train composed by fixed-shaft and differential gear drives was proposed. This planetary gear train can
transform one input into two outputs with co-axial counter-rotation. It has some advantages, such as compact structure, high transmission efficiency, and so on. On the basis of the analysis method of the power flow in differential gearing, the characters of power flow of this counter-rotation drive was determined. After comparing with the power distribution of input flow, the condition of this gear train without circulation power was investigated. Reasonable design of actuators for this train can realize dual outputs with equal torque and speeds.
Number of references:7
Ei main heading:Speed reducers
Ei controlled terms:Design  -  Drives  -  Efficiency  -  Epicyclic gears  -  Power transmission  -  Transmissions
Uncontrolled terms:Coaxial counter rotating reducer  -  Power flow -  Circulation power  -  Closed epicyclic gear train  -  Fixed shaft gear drives  -  Differential gear drives  -  Power distribution
Ei classification codes:408 Structural Design  -  601.2 Machine Components  -  602 Mechanical Drives and Transmissions  -  913.1 Production Engineering
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 38.  Accession number:082611336779
Title:Meshing theory on unsymmetric gear with double pressure angles
Authors:Xiao, Wangqiang; Li, Wei; Han, Jianyou
Author affiliation:University of Science and Technology Beijing, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 169-173
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Involute rack-cutter with unsymmetric teeth and double pressure angles was designed. The geometric parameters of rack-cutter profile were proposed as well as total tooth profile equations for the unsymmetric gear and the formulas for tooth thickness at any diameters. Then the characteristics of the teeth tip were investigated. The second transition curve equations for the unsymmetric gear were established and four types of transition curves of tooth root were compared. Furthermore, the coordinates transition matrix for conjugate tooth profile and rotation matrix
for tooth surface in local coordinates system of unsymmetric gear were given respectively. By developing relevant programs, the teeth profile of unsymmetric gear and symmetric gear were simulated. Finally, two types of gears were manufactured by wire electrical discharge machining.
Number of references:9
Ei main heading:Gears
Ei controlled terms:Computer simulation  -  Computer software  -
Contact angle  -  Design  -  Electric discharge machining  -  Gear
cutters  -  Gear teeth  -  Pressure
Uncontrolled terms:Unsymmetric gear  -  Double pressure angles  -
Meshing theory  -  Teeth tip  -  Total tooth profile equations  -
Tooth thickness  -  Second transition curve equations  -  Tooth root
Ei classification codes:601.2 Machine Components  -  603.1 Machine
Tools, General  -  604.2 Machining Operations  -  723.5 Computer
Applications  -  931.1 Mechanics  -  931.2 Physical Properties of
Gases, Liquids and Solids
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 39.  Accession number:082611336780
Title:Error corrections of spiral bevel gear tooth surface based on digitized manufacturing
Authors:Li, Jingcai; Wang, Taiyong; Fan, Shengbo; He, Gaiyun; Xing, Yuan
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 5
Issue date:May 2008
Publication year:2008
Pages:p 174-177 185
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Theory and technique of surface corrections of spiral bevel and hypoid gears were investigated. Firstly, Equations of error surface were derived and solved by coordinate measuring of tooth surface. Error surface was fitted by the tooth surface, which takes machine settings as design parameters. Equations of surface corrections were derived and the correction values of machine settings could be solved from the equations. And then, the functions between correspond orders of error surface and machine settings were constructed combining the equations of error surface and surface corrections. Finally, the correction effect of equations of gears manufactured by single side method and double side method is investigated via a numerical example.
Number of references:12
Ei main heading:Error correction
Ei controlled terms:Bevel gears  -  Design  -  Manufacture  -
Mathematical models  -  Surfaces
Uncontrolled terms:Spiral bevel gear  -  Tooth surface  -  Digitized
manufacturing  -  Error surface  -  Machine settings  -  Surface
corrections
Ei classification codes:601.2 Machine Components  -  721.1 Computer
Theory, Includes Formal Logic, Automata Theory, Switching Theory,
Programming Theory  -  913.4 Manufacturing  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 40.  Accession number:082611336781
Title:Lightweight redesign of the automotive inner door panel using tailor-welded blank structure
Authors:Shi, Yuliang; Zhu, Ping; Lin, Zhongqin
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 5
Issue date:May 2008
Publication year:2008
Pages:p 178-181
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:Aiming at reducing the weight of automobile, a study was performed to redesign the inner door panel of an existing automobile using tailor-welded blank (TWB) structure. The lightweight governing equations of strength, dent resistance and crashworthiness were established to assist in the lightweight design as the constraints. The design reduced the weight of the automotive inner door panel by about 11. 9%. Simulation results of side impact showed that the inner door panel with TWB structure performed better than that of the original design in crashworthiness, which confirmed the feasibility of this lightweight design.
Number of references:9
Ei main heading:Automobiles
Ei controlled terms:Crashworthiness  -  Design  -  Doors  -
Strength of materials  -  Structures (built objects)  -  Welding
Uncontrolled terms:Automotive inner door panel  -  Tailor welded
blank  -  Lightweight  -  Dent resistance  -  Reduced weiht
Ei classification codes:408 Structural Design  -  421 Strength of
Building Materials; Mechanical Properties  -  538.2 Welding  -
662.1 Automobiles  -  914.1 Accidents and Accident Prevention
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 41.  Accession number:082611336782
Title:Effect of V, Nb and deformation condition on deformation enhanced ferrite transformation in V-microalloying steel
Authors:Li, Xincheng; Zhang, Yan; Jiang, Yinfang; Kuai, Susu; Cai, Shougui
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 5
Issue date:May 2008
Publication year:2008
Pages:p 186-191
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:To provide a theoretical basis for producing ultra-fine grained steel and find out the effect of micro alloying element and deformation condition on deformation enhanced ferrite transformation in vanadium-alloyed steel, a deformation enhanced ferrite transformation (DEFT) thermal simulation test on vanadium-alloyed steel was carried out. The effect of V, Nb on DEFT was analyzed as two aspects: V, Nb solutionized in steel confine DEFT; on the other hand, V(C, N) and V_Nb(C, N) are induced precipitation by multiple-pass deforming, which provides nucleating center to intragranular ferrite (IGF), meanwhile, V(C, N) and V-Nb(C, N) pinned substructure to make them steady, and simultaneity the substructure transforms to ultra-fine ferrite. The experimental results showed that the interval between multiple-pass deforming is shorter and the temperature is lower, then the accumulated deformation is larger, the DEFT is easier and the volume fraction of ultra-fine ferrite is greater.
Number of references:9
Ei main heading:Deformation
Ei controlled terms:Ferrite  -  Grain size and shape  -
Microalloying  -  Niobium  -  Phase transitions  -  Steel  -
Temperature  -  Vanadium
Uncontrolled terms:Micro alloying element  -  Deformation enhanced
ferrite transformation (DEFT)  -  Thermal simulation test  -
Multiplepass deforming  -  Ultrafine grain  -  Precipitated phase
Ei classification codes:421 Strength of Building Materials;
Mechanical Properties  -  531.1 Metallurgy  -  531.2 Metallography
-  543.6 Vanadium and Alloys  -  545.3 Steel  -  549.3 Others,
including Bismuth, Boron, Cadmium, Cobalt, Mercury, Niobium,
Selenium, Silicon, Tellurium and Zirconium
Treatment:Experimental (EXP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 42.  Accession number:082611336783
Title:Envelop analysis approach for ball bearing based on lifting wavelet packet transform
Authors:Duan, Chendong; Guo, Yan
Author affiliation:Chang'an University, Xi'an 710061, 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 5
Issue date:May 2008
Publication year:2008
Pages:p 192-196
Language:Chinese
ISSN:1000-1298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract:At the basis of the lifting wavelet packet transform (WPT), a method was proposed for extracting ball bearing local defect feature. The lifting WPT was implemented by using the approximation signal obtained from the lifting scheme for further decomposition. In order to extract ball bearing defect feature efficiently, the proposed method decomposed vibration signal to a proper level by adopting a selected basis, then a wavelet packet frequency-band possessing the most energy on this decomposition level was taken as the optimum packet. Furthermore, the decomposition signal of the optimum packet was applied to extract the defect characteristic frequency via the envelop analysis approach. The proposed method was evaluated by employing simulated and experimental signals. Good and faulty ball bearings were tested and analyzed by experiment, respectively. The results proved that the method presents ideal performance, which provides an automatic monitoring and diagnostic way for ball bearing.
Number of references:11
Ei main heading:Failure analysis\
Ei controlled terms:Ball bearings  -  Computer simulation  - Decomposition  -  Defects  -  Frequency bands  -  Monitoring  - Wavelet transforms
Uncontrolled terms:Wavelet packet transform (WPT)  -  Defect feature
-  Damage feature  -  Envelop analysis  -  Lifting scheme  -
Automatic monitoring  -  Diagnostic way
Ei classification codes:601.2 Machine Components  -  723.5 Computer
Applications  -  921 Mathematics  -  943 Mechanical and
Miscellaneous Measuring Instruments
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links
FULL TEXT LINKS

 43.  Accession number:082611336742
Title:Vehicle lateral velocity observer using extended Kalman filter
Authors:Zheng, Zhizhong; Li, Liang; Yang, Cai; Song, Jian
Author affiliation:Tsinghua University, Beijing 100084, China
Serial title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title:Nongye Jixie Xuebao
Volume:v 39\
Issue:n 5
Issue date:May 2008
Publication year:2008
Pages:p 1-5 9
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 HSRI tire model, a simplified nonlinear tire force estimation method suitable for real-time computation was put forward. A dynamic model of 2-DOF-4-wheel vehicle was deduced based on the estimation method, and a vehicle lateral velocity observer was established using the extended Kalman filter. The simulated results of the vehicle dynamics simulation platform showed that the accuracy was improved greatly using the simplified nonlinear tire force estimation method compared with the linear one. Finally, the accuracy and efficiency of this observer was proved by a vehicle test, and it could meet the requirements of dynamics stability
control.
Number of references:15
Ei main heading:Stability
Ei controlled terms:Automobiles  -  Computer simulation  -  Control
-  Dynamic models  -  Estimation  -  Extended Kalman filters  -
Testing  -  Vehicles  -  Velocity
Uncontrolled terms:Dynamics stability control  -  Lateral velocity
-  Observer  -  2 DOF 4 wheel vehicle  -  Vehicle dynamics
simulation platform  -  Nonlinear tire force
Ei classification codes:422.2 Test Methods  -  662.1 Automobiles  -
723.5 Computer Applications  -  731.1 Control Systems  -  731.4
System Stability  -  921 Mathematics
Treatment:Applications (APP)
Database:Compendex
Compilation and indexing terms, ? 2008 Elsevier Inc.
Full-text and Local Holdings Links