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2009年第40卷第4期共收录47篇
1. Accession number: 20092012082972
Title: Inverse dynamics of a 2UPS-2RPS parallel mechanism by newton-euler formulation
Authors: Feng, Zhiyou1 ; Zhang, Yan2 ; Yang, Tingli3 ; Zhang, Ce4
Author affiliation: 1 Advanced Mechatronics Equipment Technology Tianjin Area Major Laboratory, Tianjin Polytechnic University, Tianjin 300160, China
2 High Speed Cutting and Precision Finishing Tianjin Area Major Laboratory, Tianjin University of Technology and Education, Tianjin 300222, China
3 Jinling Petrochemical Corporation, Sinopec Group, Nanjing 210033, China
4 School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
Corresponding author: Feng, Z. (fengzhiyou2@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 193-197
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: 2UPS-2RPS is a 4-DOF parallel mechanism with two different structure limbs. It has the advantages of simple mechanical structure, low manufacturing cost, and simple control algorithm. The number of its DOF is less than six, the limbs not only transmitting driving force but also constraint force at the same time. So both the required driving and constraint force analysis are necessary in the dynamic control and optimization design of the mechanism. Inverse dynamics equations of the mechanism were modeled by using the Newton-Euler formulation, through solving the equations, the required driving and constraint forces can be obtained when the motion of moving platform and working load were given. A computational example was also provided.
Number of references: 12
Main heading: Mechanisms
Controlled terms: Constrained optimization - Dynamics - Euler equations - Large scale systems - Machine design - Power supply circuits - Uninterruptible power systems
Uncontrolled terms: Constraint force - Control algorithms - Different structures - Driving force - Dynamic controls - Inverse dynamics - Manufacturing costs - Mechanical structures - Moving platforms - Newton-euler formulations - Parallel mechanism - Working loads
Classification code: 961 Systems Science - 931.1 Mechanics - 921 Mathematics - 912.3 Operations Research - 731.1 Control Systems - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 713.5 Other Electronic Circuits - 706.1 Electric Power Systems - 703.1 Electric Networks - 631.1 Fluid Flow, General - 601.3 Mechanisms - 601 Mechanical Design - 461.1 Biomedical Engineering
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 2. Accession number: 20092012082946
Title: Design of a dual-plate differential impact-based yield sensor
Authors: Hu, Junwan1 ; Luo, Xiwen1 ; Ruan, Huan1 ; Chen, Shuren2 ; Li, Yaoming2
Author affiliation: 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment of Ministry of Education, South China Agricultural University, Guangzhou 510642, China
2 Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Luo, X. (xwluo@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 69-72
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A dual-plate differential impact-based yield sensor was designed to eliminate the influences of the vibration signal. Two similar parallel plates were mounted in front of the outlet of the combine harvester. The front plate was used to detect the impact of grain out of elevator the harvester as well the vibration. The rear plate was used to detect the vibration only. A differential circuit was used to eliminate the vibration signal of the harvester. The experimental waves showed that the vibration signals of the two plates were similar while the harvester runs with no grain input. The influence of the vibration could be eliminated by the differential circuit. The zero drift of this sensor is less than 0.01 g/s. The error of the yield sensor is less then 3% at flow rates 0.5-2 kg/s in lab. It is not greater than 5% in field condition.
Number of references: 10
Main heading: Vibrators
Controlled terms: Harvesters - Sensors
Uncontrolled terms: Differential circuit - Dual-plate - Grain - Impact-based - Vibration signal - Yield sensor
Classification code: 601.1 Mechanical Devices - 691.1 Materials Handling Equipment - 732.2 Control Instrumentation - 752.1 Acoustic Devices - 801 Chemistry - 821.1 Agricultural Machinery and Equipment
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 14. Accession number: 20092012082952
Title: Research on the system of arm potential energy recovery in hybrid hydraulic excavators
Authors: Lin, Xiao1 ; Guan, Cheng1 ; Pei, Lei1 ; Pan, Shuangxia1
Author affiliation: 1 Institute of Mechanical Design, Zhejiang University, Hangzhou 310027, China
Corresponding author: Lin, X. (xlinzju@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 96-101 77
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: According to the analysis of the unique working condition in hydraulic excavators, a structure of arm potential energy recovery in parallel hybrid hydraulic excavators was put forward. The force condition of cylinder was analyzed, and the mathematical models of hydraulic components (e.g. cylinder, throttle and hydraulic motor) and electric components (e.g. electric motor and NIMH batteries) were built up. Also, the control strategy of the hybrid excavator, which is equipped with arm potential energy recovery, and the control method of energy recovery were proposed. Theory analysis and simulation results present that, based on the fuel efficiency of the parallel hybrid hydraulic excavator, system's fuel efficiency will be further improved by means of arm potential energy recovery. The energy recovery system has the characteristics of simple structure, higher energy recovery efficiency and controllable recovery speed.
Number of references: 12
Main heading: Excavators
Controlled terms: Construction equipment - Cylinders (shapes) - Electric machinery - Electric power measurement - Excavation - Hydraulic machinery - Hydraulic motors - Hydraulics - Mining machinery - Motors - Potential energy - Recovery
Uncontrolled terms: Analysis and simulations - Arm potential energy - Control methods - Control strategies - Electric components - Energy recover - Energy recoveries - Energy recovery efficiencies - Energy recovery systems - Force conditions - Fuel efficiencies - Hybrid power - Hydraulic components - Hydraulic excavator - Ni-mh batteries - Recovery speed - Simple structures - Working conditions
Classification code: 942.2 Electric Variables Measurements - 632.1 Hydraulics - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 705.1 Electric Machinery, General - 705.3 Electric Motors - 931.1 Mechanics - 622.5 Radioactive Wastes - 502.2 Mine and Quarry Equipment - 502.1 Mine and Quarry Operations - 408.2 Structural Members and Shapes - 405.2 Construction Methods - 405.1 Construction Equipment - 531 Metallurgy and Metallography
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 15. Accession number: 20092012082961
Title: Detection of the fresh jujube varieties and SSC by NIR spectroscopy
Authors: Zhang, Shujuan1 ; Wang, Fenghua1 ; Zhang, Haihong1 ; Zhao, Conghui1 ; Yang, Guoqiang1
Author affiliation: 1 College of Engineering and Technology, Shanxi Agricultural University, Taigu 030801, China
Corresponding author: Zhang, S. (zsujuan@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 139-142
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A non-destructive detection method based on near infrared reflectance (NIR) spectroscopy and chemometrics was put forward for discriminating varieties and detecting soluble solids content (SSC) of fresh jujube. A FieldSpec 3 spectroradiometer was used for collecting 30 sample spectra data of the three kinds of jujube separately. Then principal component analysis was used to process the spectral data after pretreatment. Six principal components (PCs) were selected based on accumulative reliabilities, and these selected PCs would be taken as the inputs of the three-layer back-propagation artificial neural network (BP-ANN). A total of 90 jujube samples were divided into calibration set and validation set randomly, the calibration set had 75 samples with 25 samples of each variety and the validation set had 15 samples with 5 samples of each variety. The BP-ANN was trained using samples in calibration set. The optimal three-layer BP-ANN model with 6 nodes in input layer, 10 nodes in hidden layer, and 2 nodes in output layer would be obtained. Then this model was used to predict the sample in the validation set. The result show that a 100% recognition ration was achieved with the threshold predictive error ±0.17, the bias between predictive value and standard value was lower than 10%.
Number of references: 8
Main heading: Principal component analysis
Controlled terms: Backpropagation - Calibration - Infrared devices - Infrared spectroscopy - Near infrared spectroscopy - Network layers - Neural networks - Spectrum analysis
Uncontrolled terms: Back-propagation artificial neural networks - BP neural network - Chemometrics - Fresh jujube - Hidden layers - Input layers - Near infrared reflectance spectroscopies - NIR spectroscopy - Non-destructive detection - Output layers - Pre treatments - Predictive errors - Predictive values - Principal components - Soluble solids contents - Spectral datum - Spectro radiometers - Standard values - Three layers
Classification code: 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 941.4 Optical Variables Measurements - 921 Mathematics - 902.2 Codes and Standards - 461.1 Biomedical Engineering - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 16. Accession number: 20092012082973
Title: Nonlinear friction compensation of planar 5-bar parallel mechanism with time variable parameters using sliding mode control
Authors: Li, Renjun1 ; Liu, Hongzhao1 ; Li, Pengfei1
Author affiliation: 1 Faculty of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Li, R. (lrjlunwen@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 198-201
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The mathematic model of joint friction in mechanical system was put forward, in which the action forces in joint were converted into ideal constraint force and friction moment. The friction was dealt as exterior non-inertia force, and the dynamics equation including nonlinear friction of planar 5-bar parallel mechanism using the method of reduced model was presented. A sliding mode controller was designed for compensating the influence of nonlinear friction and time variable parameters. The stability analysis using Lyapunov's direct method shows that the controller is asymptotically stable. The results of experiment demonstrate the effectiveness of the proposed model and controller.
Number of references: 8
Main heading: Mechanisms
Controlled terms: Asymptotic analysis - Controllers - Engineering exhibitions - Frequency modulation - Friction - Lathes - Nonlinear equations - Robustness (control systems) - Sliding mode control - Tribology
Uncontrolled terms: Asymptotically stables - Bar parallels - Constraint forces - Dynamics equations - Friction moments - Inertia forces - Joint friction - Lyapunov's direct methods - Mathematic models - Mechanical systems - Non-linear frictions - Nonlinear friction compensations - Planar parallel mechanism - Reduced models - Robustness - Sliding mode controllers - Stability analysis - Time variables
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 921.1 Algebra - 921 Mathematics - 901.2 Education - 732.1 Control Equipment - 731.1 Control Systems - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 603.1 Machine Tools, General - 601.3 Mechanisms
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 17. Accession number: 20092012082944
Title: Design and experiment on liquid fertilizer device of deep-fertilization
Authors: Wang, Jinfeng1 ; Wang, Jinwu1 ; Ge, Yiyuan1
Author affiliation: 1 Engineering College, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. (jinwuw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 58-62
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the analysis of liquid fertilizer deep application characteristics, against the problem of the artificial ditching and hard burying during the process of fertilizer deep application, a kind of device which can apply liquid fertilizer deeply was designed. Quadratic rotation orthogonal experiment was conducted to test the fertilization performance of this device, Design-Expert 6.0.1 software was used to analyze, then, the influence of interaction of pump pressure, nozzle diameter, the forward speed of soil-bin trolley and the closing valve opening to fertilization loss rate were obtained. Ultimately, the optimum performance parameters of liquid fertilizer device are ascertained: the pressure of liquid pump is 0.2 MPa, the nozzle diameter of spraying-fertilizer needle is 3 mm, the forward speed of soil-bin trolley is 0.975 m/s, the opening of the closing valve is 60% and fertilization loss rate is 2.8%. With the optimum performance parameters of liquid fertilizer device, the verification experiment result shows that the obtained fertilizer amount from the optimum combination of parameters can meet the design requirement, and the fertilizer loss rate is the least.
Number of references: 13
Main heading: Fertilizers
Controlled terms: Bins - Design - Experiments - Fluid structure interaction - Liquids - Nozzles - Pumps - Soils - Surface analysis - Surface properties
Uncontrolled terms: Analysis of liquids - Design requirements - Fertilization - Forward speed - Liquid fertilizer - Liquid pumps - Loss rate - Nozzle diameters - Optimum combinations - Optimum performance - Orthogonal experiments - Pump pressures - Response surface analysis - Valve openings
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 902.1 Engineering Graphics - 901.3 Engineering Research - 821.2 Agricultural Chemicals - 804 Chemical Products Generally - 694.4 Storage - 631.1 Fluid Flow, General - 618.2 Pumps - 483.1 Soils and Soil Mechanics - 423 Non Mechanical Properties and Tests of Building Materials - 408 Structural Design
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 18. Accession number: 20092012082935
Title: H∞ control of active suspensions with time-domain hard constraints
Authors: Song, Gang1, 2 ; Wu, Zhigang1 ; Lin, Jiahao1
Author affiliation: 1 Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116023, China
2 Structural Dynamics Engineering Department, Chongqing Communications Research and Design Institute, Chongqing 400067, China
Corresponding author: Wu, Z. (wuzhg@dlut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 11-17
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: H∞ output feedback control strategy for linear systems with time-domain hard constraints was proposed, and its application to active suspensions was presented. In the framework of linear matrix inequality optimization, sufficient conditions for the existence of such a constrained H∞ output feedback controller, as well as detail steps for the controller designing were given. The proposed approach was applied to design active suspension systems on the basis of a two-degree-of-freedom quarter car model, with vertical body acceleration chosen as controlled outputs and dynamic suspension deflection, relative dynamic tire load, and control force chosen as constrained outputs. Simulation results show that the proposed constrained H∞ controller can achieve a promising improvement on ride comfort, while keeping dynamic suspension deflections, dynamic tire loads and control forces within given bounds, even variations of the vehicle model parameters exist.
Number of references: 14
Main heading: Suspensions (components)
Controlled terms: Automobile suspensions - Constrained optimization - Controllers - Delay control systems - Engineering exhibitions - Feedback - Feedback control - Fuzzy control - Linear control systems - Linear matrix inequalities - Model automobiles - Suspensions (fluids) - Switching systems - Time domain analysis - Uncertain systems
Uncontrolled terms: Active suspension systems - Active suspensions - Control forces - Dynamic suspensions - Dynamic tire loads - Linear matrix inequality optimizations - Output feedback - Output feedback controllers - Output feedback controls - Quarter-car models - Relative dynamics - Ride comforts - Simulation results - Sufficient conditions - Time-domain hard constraints - Two degree of freedoms - Vehicle models - Vertical bodies
Classification code: 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732.1 Control Equipment - 961 Systems Science - 801.3 Colloid Chemistry - 901.2 Education - 921 Mathematics - 921.1 Algebra - 804 Chemical Products Generally - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 718 Telephone Systems and Related Technologies; Line Communications - 601.2 Machine Components - 632.1 Hydraulics - 662.1 Automobiles - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 703.1.1 Electric Network Analysis - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 29. Accession number: 20092012082940
Title: Research progress of measurement method for vehicle road way test
Authors: Zhang, Xiaolong1, 2 ; Song, Jian1 ; Feng, Nenglian3 ; Wang, Jixian2
Author affiliation: 1 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
2 School of Engineering, Anhui Agricultural University, Hefei 230036, China
3 College of Environment and Energy Engineering, Beijing University of Technology, Beijing 100022, China
Corresponding author: Song, J. (daesj@tsinghua.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 38-44
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The paper firstly analyzed the characteristic of vehicle road way test and the structure of the test system, and then brought up the development tendency of high reliability, high integration, synchronizing data acquisition, CAN communication interface, and so on. Thirdly, three key technologies were reviewed concretely in light of the industrialization requirement of vehicle dynamic stability control system, i.e. DSC, which include measurement method of the path and attitude of vehicle, the wheel force measurement technology and the steering input control method. The main stream of measurement technology for vehicle road way test in future may be the GPS only based measurement method of the path and attitude of vehicle, wheel force transducer based wheel force measurement method, the integration measurement of GPS devices and steer robot for the precisely steer control and path following road way tests.
Number of references: 41
Main heading: Roads and streets
Controlled terms: Force measurement - Global positioning system - Measurement theory - Testing - Vehicles - Wheels
Uncontrolled terms: Communication interfaces - Control methods - Development tendencies - Force transducers - Force-measurement methods - High reliabilities - Key technologies - Measurement method - Measurement technologies - Path following - Research progress - Road way test - Test systems - Vehicle dynamic stability controls
Classification code: 943.2 Mechanical Variables Measurements - 922 Statistical Methods - 716.3 Radio Systems and Equipment - 655.2.1 Communication Satellites - 943.3 Special Purpose Instruments - 601.2 Machine Components - 423.2 Test Methods - 422.2 Test Methods - 406.2 Roads and Streets - 432 Highway Transportation
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 39. Accession number: 20092012082937
Title: Fuzzy control system for semi-active hydro-pneumatic suspension
Authors: Wang, Dongliang1 ; Guan, Jifu1 ; Wang, Wenrui1
Author affiliation: 1 School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Wang, D. (wdlever@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 23-26
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Taken the 2-DOF model as the study object, the fuzzy strategies to deal with the semi-active hydro-pneumatic suspension were presented. In these strategies, the suspension deflection was the controlling objective. Then the simulation for fuzzy control system was developed and field testing was performed. The results show that the performances of semi-active hydro-pneumatic suspension excel that of traditional passive hydro-pneumatic suspension in the respect of ride comfort.
Number of references: 8
Main heading: Suspensions (components)
Controlled terms: Fuzzy control - Fuzzy systems - Pneumatic control - Spreadsheets
Uncontrolled terms: Field testing - Hydro-pneumatic suspension - Ride comforts - Semi actives - Semi-active suspension - Suspension deflections
Classification code: 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 961 Systems Science - 723.4 Artificial Intelligence - 723.1 Computer Programming - 632.3 Pneumatics - 601.2 Machine Components - 723.2 Data Processing and Image Processing
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 40. Accession number: 20092012082957
Title: Degradation of pyrethroids and carbamate pesticides in apple juice by irradiation
Authors: Hui, Weijia1 ; Yue, Tianli1 ; Yuan, Yahong1 ; Gao, Zhenpeng1
Author affiliation: 1 College of Food Science and Engineering, Northwest A and F University, Yangling 712100, China
Corresponding author: Yue, T. (yuetl@nwsuaf.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 121-124
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The pyrethroids and carbamate pesticides in apple juice were treated by 60Co-γ irradiation. The effect of irradiation dose on degradation rate of pesticides and changes of main chemical and physical indexes of apple juice were researched on system. The result shows that 60Co-γ irradiation can degrade both pyrethroids and carbamate pesticides effectively: when the irradiation dose was 9 kGy, the degradation rate of pyrethroids is Permethrin 65.72%, Cyfluthrin 94.14%, Flucythrinate 72.41% and Deltamethrin 67.84%; when the irradiation dose is 7 kGy, the degradation rate of carbamate pesticides is Lannate 61.64%, Primicarb 76.55% and Carbofuran 63.17%. 60Co-γ irradiation could affect main chemical and physical indexes of apple juice to some extent, the soluble solid concentration and the total sugar content decrease slightly, the total acid content increases slightly, the transmittance and the color value significantly increase.
Number of references: 14
Main heading: Degradation
Controlled terms: Agricultural chemicals - Esters - Fruit juices - Fruits - Irradiation - Pesticides - Radiation - Sodium compounds - Sugar (sucrose) - Sugars
Uncontrolled terms: Acid contents - Apple juice - Carbamate - Carbamate pesticides - Carbofuran - Color values - Degradation rates - Deltamethrin - Irradiation dose - Permethrin - Pesticide residue - Pyrethroid - Pyrethroids - Soluble solids - Sugar contents
Classification code: 932.1 High Energy Physics - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 822.3 Food Products - 803 Chemical Agents and Basic Industrial Chemicals - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 711 Electromagnetic Waves - 657.1 Solar Energy and Phenomena - 622.2 Radiation Effects - 802.2 Chemical Reactions
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 41. ccession number: 20092012082977
Title: Dynamic analysis of a spindle of pilot-operated solenoid valve
Authors: Ye, Qifang1 ; Chen, Jiangping1 ; Chen, Zhijiu1
Author affiliation: 1 College of Mechanical Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Corresponding author: Ye, Q. (ye_qifang@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 215-220
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The dynamics of a pilot-operated two-stage solenoid valve used in power system were studied numerically. A dynamic model coupling vibration of solenoid valve with fluid flow in the valve was derived. While solving the system equations, vibration of the valve spindle, various pressure-flow characteristics across the valve ports and orifices and pressure variation in chambers were taken into consideration. The model was validated by experimental results. The simulation results present stability of the spindle for different operating conditions and effect of working pressure and working flow rate on dynamics of the solenoid valve.
Number of references: 10
Main heading: Solenoids
Controlled terms: Dynamic analysis - Dynamic models - Dynamics - Electric power transmission networks - Flow of fluids - Flow simulation - Power transmission - Pressure effects
Uncontrolled terms: Fluid flows - Model couplings - ON dynamics - Operating conditions - Power system - Pressure variations - Pressure-flow characteristics - Self-excited vibration - Simulation results - Solenoid valve - System equations - Two stages - Valve spindles - Working pressures
Classification code: 931.1 Mechanics - 921 Mathematics - 723.5 Computer Applications - 706.1.1 Electric Power Transmission - 704.1 Electric Components - 703.1 Electric Networks - 631.1 Fluid Flow, General - 602.2 Mechanical Transmissions - 422.2 Test Methods
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 42. Accession number: 20092412122992
Title: Modification of raceway control theory on the dynamic equations group of high-speed ball bearing
Authors: Zhao, Chunjiang1, 2 ; Wang, Jianmei1 ; Huang, Qingxue1 ; Ma, Lifeng1
Author affiliation: 1 College of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
57. Accession number: 20092012082939
Title: Evaluation method of vehicle muffler's comprehensive performance under multiple working conditions
Authors: Xia, Heng1 ; Zheng, Sifa1 ; Hao, Peng1 ; Lian, Xiaomin1
Author affiliation: 1 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Corresponding author: Xia, H. (xiah06@mails.tsinghua.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 33-37
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An evaluation function of muffler was defined to describe the weighted insert loss, exhaust back pressure coefficient and linearity coefficient in a comprehensive quantitative way, so as to analyze sound reduction effect, aerodynamic performance, as well as sound quality characteristics of the muffler in multiple working conditions. The evaluating functions of three different mufflers were computed by simulation with GT-Power and experiment tests. The comparison shows that the evaluation method could describe the comprehensive property of a muffler under multiple conditions, which could be used in muffler's matching design.
Number of references: 7
Main heading: Automobile mufflers
Controlled terms: Gas dynamics - Metal drawing - Pressure effects
Uncontrolled terms: Aerodynamic performance - Back pressures - Comprehensive performance - Comprehensive properties - Evaluation functions - Evaluation method - Experiment tests - Insert loss - Linearity coefficients - Multiple working conditions - Sound qualities - Sound reductions
Classification code: 535.2 Metal Forming - 631.1.2 Gas Dynamics - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 931.1 Mechanics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 58. Accession number: 20092012082960
Title: Method of vinegar detection based on ultraviolet fingerprint technology
Authors: Xie, Huadong1 ; Bu, Lijun1 ; Li, Zhixi1
Author affiliation: 1 College of Food Science and Engineering, Northwest A and F University, Yangling 712100, China
Corresponding author: Xie, H.
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 133-138
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to find a method of vinegar detection based on ultraviolet fingerprint technology, different vinegars were used as materials, evaporation and ultraviolet spectra were studied to investigate how the factors of wavelength, dilution ratio of the liquid, evaporation temperature and mass concentration of reference affect ultraviolet vinegar curves. Finally the experiment conditions of the method were determined: wavelength at 245-330 nm, quantity dilution ratio of the liquid at 1:6, evaporation temperature at 45°C, mass concentration of reference at 45 g/L. Similarity was used as the indicator to evaluate the ultraviolet curves' feature of reproducibility, stability and difference. Three replicates of each measurement the result show that the similarity among vinegar samples fingerprints was more than 0.90, the similarity of the fingerprint of each vinegar samples in different depositing time was more than 0.90, the similarity of different fingerprint of different vinegar samples was less than 0.90. The method with excellent repeativeness, stability and differentiae.
Number of references: 8
Main heading: Acetic acid
Controlled terms: Evaporation - Liquids - Refrigerating machinery - Spectrum analysis - Ultraviolet spectroscopy - Vapors
Uncontrolled terms: Detection - Dilution ratios - Evaporation temperatures - Experiment conditions - Fingerprint - Fingerprint technologies - Mass concentrations - Reproducibility - Ultraviolet spectrum - Vinegar
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 932.2 Nuclear Physics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 922.2 Mathematical Statistics - 641.1 Thermodynamics - 644.3 Refrigeration Equipment and Components - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 70. Accession number: 20092012082968
Title: Identification and detection for surface damages of cottonseed based on morphology
Authors: Li, Wei1 ; Yu, Zhendong1 ; Chen, Tao1 ; Xun, Yi1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, W. (liww@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 169-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Taking the seeds of "Zhongmian 35" as research objectives, a method of surface damages detection was developed based on morphology of cottonseed by the digital image technology. The boundary was picked up with chain code operator and smoothed by the Fourier operator. Find the tip of the cottonseed after analyzing the curvatures of contour points. Detect the local damaged cottonseeds according to the symmetry of the boundary. Area and elongation were used to identify seriously damaged cottonseeds with statistical method. The experiments show that the detecting accuracy is 94% with 200 damaged cottonseeds and 200 cottonseeds without damages.
Number of references: 7
Main heading: Surface morphology
Controlled terms: Alumina - Codes (symbols) - Cotton - Damage detection - Digital image storage - Image processing - Imaging systems - Morphology - Seed
Uncontrolled terms: Chain codes - Contour points - Digital image technologies - Fourier - Research objectives - Surface damage
Classification code: 951 Materials Science - 746 Imaging Techniques - 804.2 Inorganic Compounds - 812.1 Ceramics - 819.1 Natural Fibers - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids - 741.3 Optical Devices and Systems - 723.2 Data Processing and Image Processing - 722.4 Digital Computers and Systems - 722.1 Data Storage, Equipment and Techniques - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 741 Light, Optics and Optical Devices
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 71. Accession number: 20092012082974
Title: Nonlinear characteristic of rolling element bearing friction torque
Authors: Xia, Xintao1 ; Jia, Chenhui1 ; Wang, Zhongyu2
Author affiliation: 1 College of Mechatronical Engineering, He'nan University of Science and Technology, Luoyang 471003, China
2 College of Instrumental Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China
Corresponding author: Xia, X. (xiaxt1957@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 202-205
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on chaos theory and via experiments, the evaluation for the nonlinear characteristics of the time series of the rolling element bearing friction torque was studied in order to lay a foundation of accurately calculating the dynamic performance of the rolling element bearing friction torque. The standard deviation of the relation dimension was used to depict the uncertainty of the friction torque and the mean of the relation dimension was used to describe the evolutive history of the nonlinear characteristics of the friction torque. The investigation indicates that the rolling element bearing belongs to the certain nonlinear dynamics system, but its friction torque presents the obvious uncertainty. As the rotational speed is raised both the standard deviation and the mean of the relation dimension of the rolling element bearing friction torque take on the nonlinearly increasing trend.
Number of references: 7
Main heading: Rolling
Controlled terms: Bearing capacity-Chaos theory-Friction-Pneumatic drives-Time series-Torque- Tribology
Uncontrolled terms: Based-on chaos - Dynamic performance - Friction torque - Non-linear characteristics - Non-linear dynamics systems - Relation dimension - Rolling element bearing - Rotational speed - Standard deviations - Uncertainty
Classification code: 961 Systems Science - 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 922.2 Mathematical Statistics - 922 Statistical Methods - 921 Mathematics - 818.3 Rubber and Elastomer Processing - 632.4 Pneumatic Equipment and Machinery - 535.1 Metal Rolling - 421 Strength of Building Materials; Mechanical Properties
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 86. Accession number: 20092012082970
Title: Integrated module division method based on axiomatic design and fuzzy dendrogram
Authors: Wang, Rijun1 ; Zhang, Jinsheng1 ; Ge, Peiqi1 ; Wang, Zhi1
Author affiliation: 1 School of Mechanical Engineering, Shandong University, Ji'nan 250061, China
Corresponding author: Wang, R. (rijunwang@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 179-183
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An integrated module division method based on the combination of axiomatic design and fuzzy dendrogram was proposed. The product was divided step by step using the framework of zigzagging map between the functional domain and physical domain of axiomatic design. In the case that the design matrix are diagonal matrices, the substructures of the division meet the functional and structural independence and can be considered as a separate module, then the division of module can be ended. When the design matrix are triangle matrices or fall rank matrices, the correlation of function and structure between the substructures were analyzed and then fuzzy dendrogram was used to cluster the substructures into modules. An example was used to illustrate the validity and rationality of the proposed approach.
Number of references: 9
Main heading: Fuzzy clustering
Controlled terms: Clustering algorithms - Large scale systems - Product design
Uncontrolled terms: Axiomatic design - Design matrices - Diagonal matrixes - Functional domains - Fuzzy dendrogram - Integrated modules - Module division - Physical domains - Step by steps
Classification code: 913.1 Production Engineering - 912.3 Operations Research - 903.1 Information Sources and Analysis - 961 Systems Science - 731.1 Control Systems - 721 Computer Circuits and Logic Elements - 461.1 Biomedical Engineering - 723 Computer Software, Data Handling and Applications
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 87. Accession number: 20092012084599
Title: Analysis of synchronous characteristic for self-synchronization system with dual rotors
Authors: Zhang, Nan1 ; Hou, Xiaolin2 ; Wen, Bangchun1
Author affiliation: 1 School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China
2 Capital Engineering and Research Incorporation Ltd., Beijing 100176, China
Corresponding author: Wen, B. (bcwen1930@vip.sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 184-188
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Self-synchronous vibrating system which was driven by two rotating exciters and moved in a 2-D space can be simplified as a self-synchronization system with dual-rotors. A typical omnipotent vibrating synchronization experiment machine was used as a prototype, variation rule of each parameter and synchronous characteristics about self-synchronization vibrating system at several representative state were quantificationally discussed and validated owning self-synchronization ability. Base on measured data of omnipotent vibrating synchronization experiment machine, the synchronous characteristics of the system were compared with measured data. Its rationality was testified. Besides, base on the measured data and emulational result, the system was found to own the self-synchronization ability for the uneven vibration force in self-synchronization vibrating system at the measure and emulation mode, even though the power supply of motion with big vibration force was shut off.
Number of references: 6
Main heading: Synchronization
Controlled terms: Rotors
Uncontrolled terms: 2-d spaces - Measured datum - Power supplies - Self-synchronization - Self-synchronization systems - Vibrating systems - Vibration forces - Vibration screen with dual rotors - Vibrational synchronization
Classification code: 601.2 Machine Components - 731.1 Control Systems - 961 Systems Science
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 88. Accession number: 20092012082963
Title: Optimization test of litchi vacuum drying under different infrared radiation sources
Authors: Xu, Fengying1 ; Li, Changyou1 ; Chen, Zhen1
Author affiliation: 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment of Ministry of Education, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Xu, F. (xu_fy@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 147-150 106
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Through the experiment of selective infrared radiation and vacuum drying and drying quality for litchi, it is found that the spectrum matching of litchi's flesh for radiation source has significant effect on drying rate, and the matching between vacuum and radiation heat flux has effect on drying rate and drying quality. The results show the optimum drying conditions are radiation source SZ, radiation distance 120 mm, heating and tempering time 15 min/15 min and vacuum degree 0.02 MPa respectively.
Number of references: 7
Main heading: Infrared drying
Controlled terms: Curing - Dewatering - Electromagnetic waves - Infrared radiation - Infrared spectroscopy - Quantum optics - Radiometers - Surface discharges - Vacuum - Vacuum technology
Uncontrolled terms: Drying conditions - Drying qualities - Drying rates - Litchi - Radiation heat fluxes - Radiation sources - Spectrum matching - Vacuum degrees - Vacuum-drying
Classification code: 944.7 Radiation Measuring Instruments - 941.4 Optical Variables Measurements - 931.4 Quantum Theory; Quantum Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 741.1 Light/Optics - 711 Electromagnetic Waves - 701.1 Electricity: Basic Concepts and Phenomena - 642.1 Process Heating - 633 Vacuum Technology
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 99. Accession number: 20092012082949
Title: Simulation of reverse flow in low specific speed double suction centrifugal pump
Authors: Zhu, Rongsheng1 ; Ou, Mingxiong2
Author affiliation: 1 Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
2 Technical and Research Center of Special Chemical Pump Engineering, Jingjiang 214537, China
Corresponding author: Zhu, R. (zrs@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 82-85
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Aiming at the problem of reverse flow which occurred under low flow rate in a low specific speed double suction centrifugal pump, the inner flow of pump and suction chambers were simulated, velocity analysis of fixed-points which was proposed to simulate probe-sampling system in experiment was used in reverse-flow research. After the statistics and analysis of velocity changes of fixed-point in the inlet of impeller in different flow rates, it was found that the curve got from simulation accord with the theory analysis and experimental curve in other literature. Based on the analysis of curve, reverse occur flow rate, reverse stable flow rate and reverse flow range were defined and explained. A new method which was used to predict the effective thickness of reverse flow field according to theory analysis was proposed.
Number of references: 10
Main heading: Flow simulation
Controlled terms: Centrifugal pumps - Flow rate - Hydraulic machinery - Probes - Pumping plants - Pumps
Uncontrolled terms: Double suction centrifugal pump - Effective thickness - Experimental curves - Fixed-points - Flow researches - Flow-field test - Inner flows - Low specific speed - Reverse flow - Sampling systems - Simulation - Stable flows - Statistics and analysis - Velocity analysis - Velocity changes
Classification code: 943.2 Mechanical Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 723.5 Computer Applications - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 632.2 Hydraulic Equipment and Machinery - 631 Fluid Flow - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings - 631.1 Fluid Flow, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 109. Accession number: 20092012082956
Title: Applicability analysis of kinetic models for extracting flavonoids from scutellariae radix
Authors: Wang, Weiyong1 ; Han, Lujia2
Author affiliation: 1 Chinese Academy of Fishery Sciences, Beijing 100141, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Han, L. (hanlj@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 116-120
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The parameters of one-component kinetic model (OKM) and two-component kinetic model (TKM) for extracting flavonoids from scutellaria radix were calculated when the kinetic curves at 4 different temperatures were obtained under 50% ethanol as solvent, liquor-to-solid ratio of 20 g/mL and scutellaria radix particles with the size of 20-40 mesh as the experimental material. It indicates that both of the regression results of the two models fit the experimental data well with the correlation coefficient of regression (R2) more than 0.9800 and the relative standard deviation of regression (RSD) less than 1.00%. And although the regression result of TKM was better than that of OKM, the changing of some TKM parameters with temperature were unreasonable.
Number of references: 12
Main heading: Kinetic theory
Controlled terms: Curve fitting - Ethanol - Organic solvents - Regression analysis
Uncontrolled terms: Applicability - Flavonoids - Infusion - Kinetic models - Least square method - Scutellariae radix
Classification code: 931.1 Mechanics - 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 523 Liquid Fuels
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 110. Accession number: 20092012082966
Title: Rape nitrogen content spectral character models based on PCA-SVR method
Authors: Zhang, Xiaodong1 ; Mao, Hanping1 ; Cheng, Xiuhua2
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education and Jiangsu, Jiangsu University, Zhenjiang 212013, China
2 College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
Corresponding author: Zhang, X. (zxd700227@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 161-165
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: It was studied that using spectral analysis to quantitatively analyze the rape total nitrogen content. Stepwise regression was used to select the characteristic wavelength of total nitrogen content against rape leaf spectra for nitrogen content prediction. The method of principal component analysis (PCA) was used to avoid the effect of multiple co-linearity among the spectral data. In order to enhance model forecast precision, the method of support vector machine regression (SVR) was used to establish the model between the rape total nitrogen content and the spectral characteristic wavelength data. From the rape spectral data under different nitrogen level, it was found that the linear relationships between rape total nitrogen content and spectral reflectance value of 406, 460, 556, 634, 662, 675 nm are very notable. The correlation coefficient between the predict value and the real value is 0.89, the RMSE is 2.51.
Number of references: 17
Main heading: Principal component analysis
Controlled terms: Gears - Image retrieval - Multilayer neural networks - Nitrogen - Reflection - Spectrum analysis - Spectrum analyzers - Support vector machines
Uncontrolled terms: Correlation coefficients - Forecast precision - Linear relationships - Nitrogen contents - Nitrogen levels - Rape - Real values - Spectral analysis - Spectral characteristics - Spectral characters - Spectral datum - Spectral reflectance values - Step-wise regressions - Support vector machine regressions - Total nitrogens
Classification code: 804 Chemical Products Generally - 921 Mathematics - 922.2 Mathematical Statistics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 741.1 Light/Optics - 461.1 Biomedical Engineering - 601.2 Machine Components - 711 Electromagnetic Waves - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 741 Light, Optics and Optical Devices
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 111. Accession number: 20092012082969
Title: Automatic color grading of beef lean tissue based on BP neural network and computer vision
Authors: Chen, Kunjie1 ; Sun, Xin1 ; Lu, Qiuyan1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Chen, K. (kunjiechen@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 173-178
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A novel method for automatic color grading of beef lean tissue was developed using computer vision and BP neural network (BP-NN) techniques. 160 beef rib-eye cross-section images were collected and color score of each sample were manually determined by a five-number panel. The segmentation of lean tissue region from rib-eye cross-section image was carried out and color features of each image were extracted using computer image processing technologies. A BP neural network model, with inputs of color features and outputs of color scores, respectively, was designed to automatically estimate the grade of beef lean tissue color. The optimum structure parameters of the BP model were determined by training. Finally, the proposed BP model was employed to predict the color score of each sample in validation set. Results show that average 95% of samples can be assigned a correct color score in 0.25 s, indicating that the proposed method permits accurate, rapid and reliable prediction of color grade of beef lean tissue.
Number of references: 14
Main heading: Neural networks
Controlled terms: Color - Computer networks - Computer vision - Meats - Structural optimization - Tissue
Uncontrolled terms: Beef - BP models - Bp neural network models - Bp-neural networks - Color features - Color grading - Color scores - Computer image processing - Cross-section images - Grade - Novel methods - Structure parameters - Tissue colors
Classification code: 921.5 Optimization Techniques - 723.4 Artificial Intelligence - 723.5 Computer Applications - 731.6 Robot Applications - 741.1 Light/Optics - 741.2 Vision - 822.3 Food Products - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 461.2 Biological Materials and Tissue Engineering - 461.1 Biomedical Engineering - 722 Computer Systems and Equipment
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 112. Accession number: 20092012082971
Title: Imitate-compliant-body model for fully compliant mechanisms of incomplete distributed compliance
Authors: Qiu, Lifang1 ; Weng, Haishan1 ; Yu, Biqiang1 ; Dai, Yunsheng1
Author affiliation: 1 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author: Qiu, L. (qlf@me.ustb.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 189-192
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Fully compliant mechanism of incomplete distributed compliance is a kind of new compliant mechanism whose compliance is between lumped and distributed. According to the characteristic of this compliant mechanism, a new analyzing model based on pseudo-rigid-body model named imitate-compliant-body model was presented. The imitate-compliant-body model of rectangular flexure hinge and link was established. The coefficient of load ratio μF and correct coefficient μλ of the model were also defined. Finally the results of five samples using the imitate-compliant-body model were presented. Through the experimental test of the five samples and the compare of the results with computer and test, the validity of this model was proved.
Number of references: 9
Main heading: Mechanical engineering
Controlled terms: Hinges - Mechanisms
Uncontrolled terms: Compliant mechanisms - Experimental tests - Flexure hinges - Fully compliant mechanism - Imitate-compliant-body model - Incomplete distributed compliance - Load ratios - Model-based - Pseudo-rigid-body model
Classification code: 601.3 Mechanisms - 605 Small Tools and Hardware - 608 Mechanical Engineering, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 125. Accession number: 20092012082976
Title: Optimal design and test of high-speed electro-pneumatic ejector valve
Authors: Xiang, Zhong1 ; Liu, Hao1 ; Tao, Guoliang1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Xiang, Z. (zju_xiang@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 210-214 220
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A finite element simulation model of the high-speed electro-pneumatic ejector valve actuator was built to analyze its steady state and transient performances. Optimal design was implemented by turning the fringe part and boring the center part of the armature base on steady state finite element analysis. Comparing with the original actuator, the optimized actuator has an almost 71% reducing in the armature weight whilst without significant steady state solenoid force loss in the actuator and without significant increase in structure dimensions that it gets a considerable improvement in armature acceleration, so the response times decrease by typically 8% under different work conditions. Finally, prototype electro-pneumatic ejector valves were fabricated according to the optimized actuator model, and a test facility was also built up to obtain the valve's dynamics. The agreement between the simulation results and the experimental data proves the effectiveness of the simulation model.
Number of references: 8
Main heading: Finite element method
Controlled terms: Actuators - Design - Ejectors (pumps) - Electric generators - Electric motors - Optimal systems - Optimization - Pneumatics - Speed - Test facilities - Testing - Valves (mechanical)
Uncontrolled terms: Actuator models - Electro-pneumatic - Experimental datum - Finite element simulation models - Finite-element analysis - High-speed ejector valve - Optimal design - Response time - Simulation - Simulation models - Simulation results - Steady state - Test - Transient performance - Valve actuators - Work conditions
Classification code: 632.3 Pneumatics - 705.2 Electric Generators - 705.3 Electric Motors - 731.1 Control Systems - 731.2 Control System Applications - 732.1 Control Equipment - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 921.6 Numerical Methods - 931.1 Mechanics - 961 Systems Science - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics - 402.1 Industrial and Agricultural Buildings - 408 Structural Design - 422.1 Test Equipment - 422.2 Test Methods - 423.1 Test Equipment - 423.2 Test Methods - 601.2 Machine Components - 602.1 Mechanical Drives - 618.2 Pumps - 619.1.1 Pipe Accessories - 619.2.1 Tank Accessories
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 126. Accession number: 20092012082933
Title: Coordinated control between direct yaw moment control and anti-block braking system used for ESP
Authors: Liu, Xiangyu1 ; Chen, Wuwei1
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Liu, X. (lxy19831010@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 1-6
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A layered coordinated control strategy for direct yaw moment control (DYC) and anti-block braking system (ABS) were adopted aiming at improving the performance of electronic stability program (ESP). An upper coordinated controller was designed to adjust the bottom controllers DYC and ABS according to vehicle dynamic information. Simulation results show that the vehicle with coordinated control of DYC and ABS achieve better performances of dynamic stability when steering.
Number of references: 12
Main heading: Braking
Controlled terms: Brakes - Controllers - Engineering exhibitions - System stability - Vehicles - Vibration control
Uncontrolled terms: Anti-block braking system - Coordinated control - Coordinated control strategies - Coordinated controllers - Direct yaw moment control - Dynamic stabilities - Electronic stability programs - Simulation - Simulation results - Vehicle dynamics
Classification code: 961 Systems Science - 901.2 Education - 732.1 Control Equipment - 731.4 System Stability - 731.3 Specific Variables Control - 602 Mechanical Drives and Transmissions - 432 Highway Transportation
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 147. Accession number: 20092012082959
Title: Optimization of experiment parameters for using electronic nose to evaluate freshness of silver carp
Authors: Zhang, Jun1, 2 ; Li, Xiaoyu1 ; Wang, Wei1 ; Zhou, Zhu1 ; Wu, Zexin1 ; Feng, Yaoze1
Author affiliation: 1 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
2 School of Construction Machinery, Chang'an University, Xi'an 710064, China
Corresponding author: Li, X. (lixiaoyu@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 129-132 142
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on virtual instrument and bionic olfaction technology, the sampling method, sampling time and sample weight of silver carp stored at 4°C were investigated by our home-made electronic nose with four gas sensor array during storage; PCA (principal component analysis) method was employed to optimize experiment parameters. The result indicated that the improved free air diffused method was the optimal sampling method, which can simplify the sample equipment compared to the traditional headspace method. The optimal measurement conditions for evaluating freshness of freshwater fish are 60 g for sample weight, free air diffused method for sampling method and 5 min for sampling time.
Number of references: 15
Main heading: Principal component analysis
Controlled terms: Artificial organs - Chemical sensors - Digital instruments - Meats - Optimization - Silver
Uncontrolled terms: Electronic nose - Fish freshness - Freshwater fishes - Gas sensor arrays - Headspace - Optimal measurements - Optimal samplings - Pca (principal component analysis) - Sampling methods - Sampling time - Silver carp - Virtual instrument
Classification code: 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921.5 Optimization Techniques - 801 Chemistry - 547.1 Precious Metals - 462.4 Prosthetics - 822.3 Food Products
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 162. Accession number: 20092012082943
Title: Influence of the combustion chamber structure on the lean burn CNG engine performance
Authors: Si, Pengkun1, 2 ; Zhang, Huiming1 ; Yang, Zhiyong3 ; Zhang, Zili3 ; Jiao, Yunjing1 ; Cheng, Hui3
Author affiliation: 1 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
2 Automotive Engineering Department, Chengde Petroleum College, Chengde 067000, China
3 Dongfeng Nanchong Automobile Co. Ltd., Nanchong 637000, China
Corresponding author: Si, P. (spk924@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 53-57
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: This paper presented the different mass motion and the mechanism, analyzed the effect of the mass motion on the combust process of the engine. Combustion chambers with different structure and size that fit the combustion of the lean burn CNG engine were given and the effect of the chambers with different structure on the performance of CNG engine was studied through numerical study and experiment. The result shows that the combustion of lean burn engine with high turbulence chamber is fast, provides more power and economic performance, but high NOx emissions.
Number of references: 16
Main heading: Gas engines
Controlled terms: Combustion - Combustion chambers - Energy resources - Engines - Gas industry - Machine design - Natural gas - Smoke - Thermochemistry
Uncontrolled terms: Cng engines - Compressed natural gas engine - Different mass - Different structures - Economic performance - Lean burn - Lean-burn engines - Mass motions - Numerical studies - Performance
Classification code: 911.2 Industrial Economics - 617.3 Steam Engines - 641.1 Thermodynamics - 654.2 Rocket Engines - 801.3 Colloid Chemistry - 801.4 Physical Chemistry - 804 Chemical Products Generally - 612.3 Gas Turbines and Engines - 601 Mechanical Design - 525.1 Energy Resources and Renewable Energy Issues - 522 Gas Fuels - 521.1 Fuel Combustion - 451.1 Air Pollution Sources - 612 Engines
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 163. Accession number: 20092012082954
Title: Biomass vacuum pyrolysis liquefaction system for bio-oil
Authors: Yang, Suwen1 ; Qiu, Keqiang1
Author affiliation: 1 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Corresponding author: Qiu, K. (qiuwhs@sohu.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 107-111
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Using seven types of biomass as raw materials, such as Chinese fir sawdust, corn stalks, rice husks and so on, experiments of biomass vacuum pyrolysis to prepare bio-oil were carried out in the home-made vacuum pyrolysis device. Seven kinds of bio-oil yields are more than 55%, and the bio-oil yield from Chinese fir sawdust is more than 67%. Component analysis results show that bio-oil is a kind of organic compounds with higher oxygen content. The major chemical components of seven kinds of bio-oil are similar, but large differences are in their relative contents. The phenol and phenol derivatives content in the bio-oil from Chinese fir sawdust is up to 72.81%. The bio-oil from Chinese fir sawdust contains eugenol whose relative content is 4.12%.
Number of references: 10
Main heading: Biomass
Controlled terms: Biological materials - Chemical reactions - Organic compounds - Oxygen - Phenols - Pyrolysis - Thermogravimetric analysis - Vacuum - Vacuum applications
Uncontrolled terms: Bio-oil - Bio-oil yields - Biomass energy - Chemical components - Chinese firs - Component analysis - Corn stalks - Liquefaction systems - Oxygen contents - Phenol derivatives - Rice husks - Vacuum pyrolysis
Classification code: 805.1.1 Biochemical Engineering - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.2 Chemical Reactions - 821.5 Agricultural Wastes - 801 Chemistry - 633 Vacuum Technology - 525.1 Energy Resources and Renewable Energy Issues - 461.2 Biological Materials and Tissue Engineering - 633.1 Vacuum Applications
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 164. Accession number: 20092012082948
Title: Low-head pump performances and determination of reasonable scope for variable speed operation
Authors: Zhang, Rentian1, 2 ; Cheng, Jilin1 ; Zhu, Honggeng1 ; Yao, Linbi2 ; Zhang, Lihua1
Author affiliation: 1 College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
2 Jiangsu Surveying and Design Institute of Water Resources Co. Ltd., Yangzhou 225009, China
Corresponding author: Zhang, R. (r_zhang@yzu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 78-81
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: According to the special operation conditions of low-head pumping stations with variable speed devices (VSD) in China's South-to-North Water Diversion Project, the changing rules of pumping system performances under variable speed operation were investigated. It was pointed out that the conventional pump affinity laws were not suitable any more when the net head was greater than zero while VSD were used, and a new affinity law was proposed. By means of linearized pump performances at rated rotational speed, simplified methodologies predicting pumping system performances with VSD were put forward. After introducing the conception of specific energy, the energy consumptions of variable operation and other regulation methods were analyzed to pump a specific quantity of water within stipulated period. Based on the consideration of VSD efficiency, electric motor efficiency and the relationship of specific energy with the change of pump efficiency at different rotational speed, a method was brought forward to determine the reasonable and economic scope of variable speed under different net heads.
Number of references: 7
Main heading: Pumps
Controlled terms: Electric machinery - Electric motors - Flood control - Laws and legislation - Pumping plants - Speed - Water supply
Uncontrolled terms: Affinity laws - Conventional pumps - Electric motor efficiencies - Performance prediction - Pump efficiencies - Pump performance - Pumping stations - Pumping systems - Rotational speed - South-to-north water diversion projects - Special operations - Specific energy - Variable speed operation - Variable speed scope
Classification code: 931.1 Mechanics - 914.1 Accidents and Accident Prevention - 902.3 Legal Aspects - 705.3 Electric Motors - 705.1 Electric Machinery, General - 971 Social Sciences - 618.2 Pumps - 446.1 Water Supply Systems - 446 Waterworks - 442.1 Flood Control - 402.1 Industrial and Agricultural Buildings - 454.1 Environmental Engineering, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 181. Accession number: 20092012082953
Title: Preparation technology of biodiesel using K2CO3 loaded hydrotalcite catalyst
Authors: Jiang, Shaotong1 ; Cai, Jing1 ; Pan, Lijun1 ; Zhang, Fujian1 ; Zhang, Yi1
Author affiliation: 1 School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Jiang, S. (jiangshaotong@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 102-106
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: K2CO3 loaded hydrotalcite catalyst was prepared by impregnation method and the condition of preparing catalyst with K2CO3 loaded 20%, blend temperature 80°C, roasting temperature 600°C and roasting time 6 h was confirmed. Biodiesel was prepared from rapeseed oil by transesterification with the solid base catalyst of K2CO3 loaded hydrotalcite. Factors that affected the reaction's conversion like reaction temperature, molar ratio of methanol to oil, mass ratio of catalyst to oil and reaction time were investigated. The content of methyl ester was analyzed by GC. The conversion of 96.9% was achieved using a 12 methanol to oil molar ratio at 60°C for 60 min and 4% catalyst. The catalytic activity is closely related with its formation of new crystalline phase by the method of XRD and TG analysis.
Number of references: 13
Main heading: Biodiesel
Controlled terms: Calcination - Catalysis - Catalyst activity - Esterification - Esters - Methanol - Sodium compounds - Vegetable oils
Uncontrolled terms: Catalytic activities - Crystalline phase - Hydrotalcite - Hydrotalcite catalysts - Impregnation methods - K2CO3 - Mass ratios - Methyl esters - Molar ratios - Preparation technology - Rape seed oil - Reaction temperatures - Reaction time - Roasting temperatures - Solid base catalyst - XRD
Classification code: 804.2 Inorganic Compounds - 804.1 Organic Compounds - 804 Chemical Products Generally - 822.3 Food Products - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 523 Liquid Fuels - 802.3 Chemical Operations
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 182. Accession number: 20092012082942
Title: Idle speed control of CNG engine based on robust control theory
Authors: Li, Xiqin1 ; Liu, Bing2 ; Fan, Chengde3
Author affiliation: 1 School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
2 Library, Zhejiang University of Science and Technology, Hangzhou 310023, China
3 Department of Quality, Shanghai Volkswagen Automotive Company Ltd., Shanghai 201805, China
Corresponding author: Li, X. (lixiqin@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 49-52
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The basic methods of H-infinity control theory and model of standard H-infinity design problem were described. The H-infinity robust control theory was applied to the design process of CNG engine idle speed control. The dynamic model of CNG engine was established. The diagram of engine uncertainty was stated. A controller of CNG engine idle speed was successfully developed based on H-infinity control theory and Matlab robust toolbox. The simulations and experiments about the CNG engine were done and the results show that the H-infinity controller possesses good robust features and can improve the stability of CNG engine idling operation.
Number of references: 5
Main heading: Gas engines
Controlled terms: Controllers - Energy resources - Engineering exhibitions - Engines - Experiments - Gas industry - MATLAB - Natural gas - Robust control - Speed - Speed control - Speed regulators - System theory
Uncontrolled terms: Cng engines - Compressed natural gas engine - Design problems - Design process - H-infinity control theories - H-infinity controllers - H-infinity robust control - Idle speed - Idle speed controls - Simulation - Standard h
Classification code: 731.3 Specific Variables Control - 731.4 System Stability - 732.1 Control Equipment - 901.2 Education - 961 Systems Science - 901.3 Engineering Research - 912.3 Operations Research - 921 Mathematics - 931.1 Mechanics - 911.2 Industrial Economics - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 461.1 Biomedical Engineering - 522 Gas Fuels - 525.1 Energy Resources and Renewable Energy Issues - 612 Engines - 612.3 Gas Turbines and Engines - 617.3 Steam Engines - 654.2 Rocket Engines - 723.1.1 Computer Programming Languages
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 183. Accession number: 20092012082958
Title: Effect of chitosan coating with Nano-CaCO3 appendix on quality of fresh cut yam
Authors: Luo, Zisheng1 ; Xu, Xiaoling1 ; Xu, Tingqiao1 ; Xie, Jing1
Author affiliation: 1 School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author: Luo, Z. (luozisheng@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 125-128
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to determine the effectiveness of nano-CaCO3 appendix on chitosan, fresh cut yam were treated by chitosan coating with nano-CaCO3 appendix before stored at 10°C. The results indicate the titratable acidity (TA), Vitamin C content and L value of treated fruit by chitosan coating with nano-CaCO3 appendix was 10.5%, 8.4% and 6.9% higher than that of chitosan coating fruit, while the weigh loss and total phenolic content were 9.2% and 8.3% less than that of chitosan coating fruit. It also inhibited the activities of polyphenol oxidase (PPO) and peroxidase (POD) maintained lower level of BI and prolonged shelf-life. Therefore, chitosan modified with nano-CaCO3 have potential use in fresh cut yam storage.
Number of references: 13
Main heading: Chitosan
Controlled terms: Chitin - Coatings - Enzymes - Fruits - Phenols
Uncontrolled terms: Chitosan coatings - L-values - Nano-CaCO3 - Polyphenol oxidase - Preservation - Shelf lives - Titratable acidities - Total phenolic contents - Vitamin-C - Yam
Classification code: 461.2 Biological Materials and Tissue Engineering - 539 Metals Corrosion and Protection; Metal Plating - 801.2 Biochemistry - 804.1 Organic Compounds - 813.2 Coating Materials - 821.4 Agricultural Products
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 184. Accession number: 20092012082947
Title: Theory and experiment on non-uniform air-flow cleaning of air-screen cleaning unit
Authors: Chen, Ni1 ; Huang, Dongming2 ; Chen, Dejun1 ; Tian, Xiaojun1 ; Zhang, Jianrong1
Author affiliation: 1 Mechanics and Electronics Engineering Campus, Jinhua College of Profession and Technology, Jinhua 321017, China
2 Jinhua Agri-machinery Research Institute, Jinhua 321000, China
Corresponding author: Chen, N. (cyiny@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 73-77
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The grain dropped to longitudinal cleaning sieve from threshing unit mound in the right corner of the screen deck will block cleaning. The theory of non-uniform air-flow cleaning was put forward and the conical centrifugal fan, resource of non-uniform air-flow was designed. Theoretical analysis and experimental verification show that, as the diameter difference between the small-end and big-end of conical centrifugal fan, the wind pressure difference of non-uniform air-flow forms, which results in high transversal wind velocity in the front of vibrating screen (the highest velocity is 2.6 m/s). The wind pressure difference puffs falling grain to the other side, which changes initial distribution apparently and improves cleaning quality of transversal axis-flow feed combine.
Number of references: 8
Main heading: Air cleaners
Controlled terms: Agriculture - Cleaning - Combines - Wind effects
Uncontrolled terms: Block cleanings - Conical centrifugal fan - Experimental verifications - Non-uniform air-flow - Screen cleanings - Screen decks - Threshing units - Transversal winds - Wind pressures
Classification code: 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 651.2 Wind Tunnels - 451.2 Air Pollution Control - 443.1 Atmospheric Properties - 408.1 Structural Design, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 201. Accession number: 20092012082967
Title: Automatic detecting and grading method of potatoes with computer vision
Authors: Zheng, Guannan1 ; Tan, Yuzhi1 ; Zhang, Junxiong1 ; Li, Wei1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Tan, Y. (yztan@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 166-168 156
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An automatic detecting and grading method of potatoes with computer vision was studied. Potatoes were graded according to their size by computing the potatoes' longest axis and potatoes were grading according to the shape by computing the eccentricities. Sprouting potatoes were detected by computing the difference values of green channel gray value and misshapen potatoes were detected by computing sampling normalized radius differences' absolute values. A potato grading software was designed to grade potatoes by size, shape and detect at the same time. The experiments show that the result with grading method described above is steady, and its precision was up to 88.0%.
Number of references: 7
Main heading: Computational methods
Controlled terms: Computer vision - Grading
Uncontrolled terms: Absolute values - Gray values - Potatoes - Property
Classification code: 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.5 Computer Applications - 731.6 Robot Applications - 741.2 Vision - 913.3 Quality Assurance and Control - 921 Mathematics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 202. Accession number: 20092012082964
Title: Path tracking for agricultural vehicle based on fuzzy control
Authors: Zhou, Jianjun1 ; Zhang, Man1 ; Wang, Maohua1 ; Liu, Gang1 ; Ji, Chaofeng1 ; Zhang, Zhigang2
Author affiliation: 1 Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
2 College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Wang, M. (wangmh@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 151-156
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The method for fuzzy control steering and the construction of fuzzy controller were described in detail at first. On a refitted storage battery car, an automatic navigation control system was developed with DGPS, digital compass and angle sensor. The construction and work principle of the navigation control system were introduced. Line path tracking and curve path tracking methods were brought forward. At last simulation was taken using kinematics of two-wheel vehicle, at the same time line path tracking and curve path tracking experiments were conducted. Results of simulation and experiments indicate that navigation control system can make the vehicle run following the predefined path. The lateral error is less than 0.19 m when the car ran following the predefined line route, and the lateral error is less than 0.26 m when the car ran following the predefined curve path.
Number of references: 11
Main heading: Fuzzy control
Controlled terms: Automobile steering equipment - Control system analysis - Electric batteries - Electric power supplies to apparatus - Global positioning system - Navigation - Steering
Uncontrolled terms: Agricultural vehicles - Angle sensors - Automatic navigations - Automatic steering - Curve path tracking - Digital compass - Fuzzy controllers - Navigation control systems - Storage batteries - Time lines - Two-wheel vehicles - Work principles
Classification code: 713.5 Other Electronic Circuits - 715.2 Industrial Electronic Equipment - 716.3 Radio Systems and Equipment - 943.3 Special Purpose Instruments - 723.4 Artificial Intelligence - 731.1 Control Systems - 921 Mathematics - 731 Automatic Control Principles and Applications - 702.1 Electric Batteries - 671.2 Ship Equipment - 431.5 Air Navigation and Traffic Control - 434.4 Waterway Navigation - 655.1 Spacecraft, General - 655.2.1 Communication Satellites - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 203. Accession number: 20092012082965
Title: Dynamic simulation of leaf inclination angle distribution based on ellipsoidal function
Authors: Zhang, Jun1 ; Wang, Yiming2 ; Zhao, Yandong3 ; Li, Jinping1
Author affiliation: 1 College of Information, Beijing Union University, Beijing 100101, China
2 College of Information and Electronic Engineering, China Agricultural University, Beijing 100083, China
3 College of Industry, Beijing Forestry University, Beijing 100083, China
Corresponding author: Wang, Y. (ym_wang@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 157-160 183
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: On the basis of analyzing the temporal and spatial distribution of cotton leaf inclination angle, the ellipsoidal function was used to simulate the dynamic distribution of cotton leaf inclination angle. Cotton growth period was divided into four phases, and cotton canopy was divided into five layers according to Gauss distance. The model simulated the leaf inclination angle density distribution of different highness during different growth period that it can reflect leaf inclination angle distribution accurately. The model was validated by experimental data of different sowing dates. The coefficient of determination (R2) based on the 1:1 line and the root mean square error between the simulated and measured values are 0.945 and 6.3% respectively. It proved that simulation results of the model come very close to the actual values.
Number of references: 13
Main heading: Cotton
Controlled terms: Computer simulation - Size distribution
Uncontrolled terms: Coefficient of determinations - Cotton growths - Density distributions - Dynamic distributions - Dynamic simulation - Ellipsoidal function - Experimental datum - Growth periods - Leaf inclination angle distribution - Root mean square errors - Simulation results - Sowing dates - Temporal and spatial distributions
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 821.4 Agricultural Products - 933.1 Crystalline Solids - 819.1 Natural Fibers - 531.2 Metallography - 423 Non Mechanical Properties and Tests of Building Materials - 723.5 Computer Applications
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc 219. Accession number: 20092012082941
Title: Experimental analysis of knock in a DME HCCI engine using discrete wavelet transform
Authors: Hou, Junxing1 ; Qiao, Xinqi1 ; Zhang, Dequan2 ; Wang, Zhen1 ; Huang, Zhen1
Author affiliation: 1 Key Laboratory for Power Machinery and Engineering of M. O. E, Shanghai Jiaotong University, Shanghai 200240, China
2 R and D Center, Longkou Longbeng Fuel Injection Co. Ltd., Longkou 265701, China
Corresponding author: Qiao, X. (qiaoxinqi@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 45-48
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An experimental analysis of HCCI by port injection of DME was carried out on an engine retrofitted from a diesel engine. The in-cylinder pressure with and without knock were processed by discrete wavelet transform. Wavelet energy of different levels were calculated and analyzed to obtain DME knock characteristics. The analysis shows that the energy distributions with and without knock display different characteristic. Without knock, the energy value of the detail D3 at level 3 is the largest, and the value of the detail D1 at level 1 is the largest with knock. With the increase of engine speed, or adding LPG into DME injected in the port have little effects on energy distributions. The knock intensity, however, plays a key role in determining their distribution. The more intensified the knock is, the larger the energy values of D1 goes. The energy value of D1, D2 and D3 can be used to detect knock.
Number of references: 5
Main heading: Synthetic fuels
Controlled terms: Diesel engines - Discrete wavelet transforms - Electric power distribution - Ignition
Uncontrolled terms: Cylinder pressures - DME - Energy distributions - Energy values - Engine speed - Experimental analysis - Hcci engines - Homogeneous charge compression ignition - Knock - Knock intensities - Level-1 - Wavelet energies
Classification code: 921.3 Mathematical Transformations - 706.1.2 Electric Power Distribution - 612.2 Diesel Engines - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 521.1 Fuel Combustion
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 220. Accession number: 20092012082951
Title: Control strategy of power matching and power sources optimization for hydraulic excavators
Authors: Wang, Dongyun1 ; Guan, Cheng1 ; Pan, Shuangxia1 ; Lin, Xiao1
Author affiliation: 1 Institute of Mechanical Design, Zhejiang University, Hangzhou 310027, China
Corresponding author: Wang, D. (zdwdy@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 91-95
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Because of the sharp fluctuation of the load condition, the working points of the engine are mostly distributed in the high fuel consumption area. This causes low fuel economy of the power source and is the main reason of high power losses in conventional hydraulic excavators. In order to solve this problem, a new control strategy based on hybrid technology was presented. Its target was to achieve power matching and optimize the working condition of the power sources simultaneously. Experimental results show that the control strategy can realize the target. It reduce the speed fluctuation and optimize the working points of the engine. Meanwhile, it achieves higher fuel economy than conventional methods.
Number of references: 10
Main heading: Excavators
Controlled terms: Construction equipment - Electric power measurement - Excavation - Fuel economy - Hydraulics - Mining machinery - Optimization
Uncontrolled terms: Control strategy - Energy saving - Hybrid power - Hydraulic excavator - Power matching
Classification code: 942.2 Electric Variables Measurements - 921.5 Optimization Techniques - 632.1 Hydraulics - 525.2 Energy Conservation - 521 Fuel Combustion and Flame Research - 502.2 Mine and Quarry Equipment - 502.1 Mine and Quarry Operations - 405.2 Construction Methods - 405.1 Construction Equipment
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 221. Accession number: 20092012082934
Title: Design and simulation of electric drive truck control system
Authors: Li, Gang1 ; Zhang, Wenming1 ; Chen, Shuxin1
Author affiliation: 1 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author: Li, G. (lear88@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 7-10 37
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An electric drive truck control system composed with a speed-current dual loop was designed to ensure the output power of electromotor and engine were matched and the engine can operate in economical condition. This demand the engine keep maximum permit current and accelerate in the shortest time to keep the vehicle's best startup capability. Changeless output of vehicle in operation was guaranteed and impact like change when overcoming resistance during driving was overcame. Simulation result with Matlab provide the static and dynamic characteristic of the system.
Number of references: 5
Main heading: Electric drives
Controlled terms: Automobile engines - Impact resistance - MATLAB - Trucks - Wheels
Uncontrolled terms: Design and simulations - Dual loops - Output power - Simulatio - Simulation results - Static and dynamics
Classification code: 921 Mathematics - 723.5 Computer Applications - 723.1.1 Computer Programming Languages - 705 Electric Generators and Motors - 663.1 Heavy Duty Motor Vehicles - 661.1 Automotive Engines - 601.2 Machine Components - 421 Strength of Building Materials; Mechanical Properties - 408.1 Structural Design, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 235. Accession number: 20092012082936
Title: Neural network optimization on matching of air suspension system
Authors: Yang, Qiyao1 ; Zhou, Kongkang2 ; Li, Jingdong3 ; Xu, Xing4 ; Yuan, Chunyuan5
Author affiliation: 1 College of Mechanical and Electrical Engineering, Anhui University of Architecture, Hefei 230601, China
2 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
3 Tech. Center, Shanghai Volkswagen Automotive Co. Ltd., Shanghai 201805, China
4 College of Electronic and Information Engineering, Jiangsu University, Zhenjiang 212013, China
5 Mechanical Engineering College, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Corresponding author: Zhou, K. (zkk@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 18-22 26
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A double-mass model of air suspension was established. The method based on RBF network for matching optimization of air suspension systems damping and air spring was proposed. When the best match was chose, the vehicle body acceleration and wheels dynamic load were selected for minimum optimization objectives and the suspension dynamic travel was the constraint condition. Simulation results show that the bus ride comfort and road holding ability were improved. The simulation results agree with the testing data of the test bench.
Number of references: 16
Main heading: Suspensions (components)
Controlled terms: Automobile suspensions - Computer simulation - Constrained optimization - Damping - Neural networks - Optimization - Vehicle wheels
Uncontrolled terms: Air springs - Air suspension - Best matches - Constraint conditions - Mass models - Matching - Matching optimizations - Neural network optimizations - RBF networks - Ride comforts - Simulation results - Suspension dynamics - Test benches - Testing datum - Vehicle bodies
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 731.1 Control Systems - 723.5 Computer Applications - 723.4 Artificial Intelligence - 961 Systems Science - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 662.4 Automobile and Smaller Vehicle Components - 632.1 Hydraulics - 601.2 Machine Components - 461.1 Biomedical Engineering - 663.2 Heavy Duty Motor Vehicle Components
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 248. ccession number: 20092012082945
Title: Prediction model for atomization performance of electrostatic spraying nozzle
Authors: Liu, Chunjing1, 2 ; Zheng, Jiaqiang1 ; Wang, Keyuan3
Author affiliation: 1 College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
2 Department of Mechanical and Electronic Engineering, College of Bengbu, Bengbu 233030, China
3 College of Mechanical and Electronic Engineering, Shihezi University, Shihezi 832000, China
Corresponding author: Zheng, J. (jqzheng@njfu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 63-68
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: On the basis of analyzing disadvantages of conventional prediction model, a novel prediction model based on modified PSO least square support vector machine was proposed. Based on the new model, the design steps and learning algorithm were given. The practical experimental results show that the construction speed of this modified PSO LS-SVM model is 10 times less than that of the LS-SVM model, while the prediction error is 50%. Moreover, compared with BP model, the prediction accuracy is about 10 times higher than that of the former. The effects of electrostatic spraying parameters on atomization performance of electrostatic spraying nozzle can be predicted with the limited test data. Thus the variation law of atomization performance of electrostatic spraying nozzle following electrostatic spraying parameters can be obtained.
Number of references: 13
Main heading: Support vector machines
Controlled terms: Atomization - Curve fitting - Education - Electrostatics - Image retrieval - Jets - Learning algorithms - Mathematical models - Nozzles - Research aircraft
Uncontrolled terms: BP models - Construction speed - Design steps - Electrostatic spraying nozzle - Modified PSO least square support vector machine - New models - Prediction accuracies - Prediction errors - Prediction model - Svm models - Test datum
Classification code: 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 901.3 Engineering Research - 901.2 Education - 802.3 Chemical Operations - 741 Light, Optics and Optical Devices - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 701.1 Electricity: Basic Concepts and Phenomena - 652.1 Aircraft, General - 631.1 Fluid Flow, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 249. Accession number: 20092012082978
Title: Analysis on the leaking flow field of the piston sector considering the high press and high velocity
Authors: Hu, Renxi1, 2 ; Yuan, Shihua2 ; Liu, Hongning1 ; Meng, Qiuhong1
Author affiliation: 1 Department of Basic Courses, Ordnance Engineering College, Shijiazhuang 050003, China
2 School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Hu, R. (hurenxi2000@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 221-226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The mathematic model on the leaking flow field of the piston sector considering the high press and high velocity in the piston pump was established, and the numerical simulation and analysis were done. At first, the 3-D dynamic analysis on the piston sector was done and the force change principle of the piston sector was analyzed in the Matlab program. Then, the theoretical mathematic model about the flow field in the piston sector with the acentric and inclined armillary seam was built based on two parameters: the inclined angle φ and the acentric distance e. These two parameters φ and e were numerically solved with the theory of dynamic pressure supporting and the result of the dynamic analysis on the piston sector. The numerical analysis on the leaking flow field in the piston sector with the acentric and inclined armillary seam was done in the Matlab program with the method of 1-D searching in some conditions. At last, the simulation was done with Fluent and the experimentation was conducted. The computing and analysis results indicate that the armillary seam in the piston sector is acentric and inclined considering the high press and high velocity, the change extent of the leaking flow rate in the piston sector is broader than which in the piston sector with the assumed homocentric armillary seam, but the average leaking flow rate is less in practice.
Number of references: 7
Main heading: Flow simulation
Controlled terms: Dynamic analysis - Flow fields - Flow rate - Mathematical models - MATLAB - Presses (machine tools) - Three dimensional
Uncontrolled terms: 3-d dynamic analysis - Analysis results - High velocities - Inclined angles - Leak - Mathematic models - MATLAB programs - Numerical simulations - Piston pumps - Simulation - Theory of dynamics - Two parameters
Classification code: 943.2 Mechanical Variables Measurements - 921 Mathematics - 902.1 Engineering Graphics - 723.5 Computer Applications - 723.1.1 Computer Programming Languages - 631.1 Fluid Flow, General - 631 Fluid Flow - 603.1 Machine Tools, General - 422.2 Test Methods
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 266. Accession number: 20092012082955
Title: Preparation of β-carotene nanodispersions by solvent displacement technique and their stability
Authors: Yin, Lijun1 ; Han, Qinghua2 ; Liu, Haijie1 ; Wang, Xiaohui3 ; Li, Lite1
Author affiliation: 1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
3 College of Material Science and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Corresponding author: Liu, H. (liuhaijie@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 112-115 111
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Effect of four different emulsifiers on the physicochemical properties and stability of β-carotene nanoparticles in oil-in-water dispersions produced by a solvent displacement technique were examined. The β in carotene particle size was measured, and the stability and retention of β-carotene during storage were determined by HPLC. The particle size of β-carotene nonodispersions stabilized by sodium caseinate (SC) was generally larger than that in the presence of Tween 20, sucrose fatty acid ester (SE) or decaglycerol monolaurate (ML750). The addition of SE or ML750 could increase the ability of sodium caseinate to stabilize β-carotene particle formation. It is suggested that sodium caseinate can be useful to partly replace SE as emulsifiers in the preparation of β-carotene nanodispersions with less than 50 nm mean diameter. During storage at 4°C, although the β-carotene content in the nanodispersions showed a significant decrease with increasing storage period, especially in the case of Tween 20 as emulsifiers, the size distribution was almost unchanged in all prepared β-carotene nanodispersions.
Number of references: 7
Main heading: Stability
Controlled terms: Esters - Fatty acids - Particle size - Sodium - Solvents - Spontaneous emission - Sugar (sucrose)
Uncontrolled terms: Distribution - Mean diameters - Monolaurate - Nano dispersions - Oil in waters - Particle diameter - Particle formations - Physico-chemical properties - Sodium caseinate - Storage periods - Sucrose fatty acids - Tween-20
Classification code: 961 Systems Science - 951 Materials Science - 943.2 Mechanical Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 931 Classical Physics; Quantum Theory; Relativity - 822.3 Food Products - 813.2 Coating Materials - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 801 Chemistry - 731.4 System Stability - 711 Electromagnetic Waves - 549.1 Alkali Metals
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 280. Accession number: 20092012082950
Title: Numerical study of flow characteristics in the impeller side chamber of centrifugal pump
Authors: Wang, Xiuyong1 ; Wang, Canxing2 ; Li, Yibin1
Author affiliation: 1 College of Fluid Power and Control Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2 School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
Corresponding author: Wang, C. (mecwangcx@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 86-90
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Detailed flow characteristics in the impeller side chamber of a centrifugal pump were studied using CFD method. The computational domain was made up of impeller passages, volute casing, impeller side chamber and seal clearance. Under the hypothesis of steady flow, the RNG k-Ε turbulence model and RANS equations in multiple reference frames were used to simulate the flow fields. The good agreement of computational and experimental data shows that the CFD method is appropriate for the present study. Computational results reveal that the flow fields are unaxisymmetric in the impeller side chamber, and much more complex than that in an enclosed rotor-stator system. Nevertheless, along axial direction, the velocity profiles are similar with each other both in the impeller side chamber and in the enclosed rotor-stator system.
Number of references: 7
Main heading: Pumps
Controlled terms: Centrifugal pumps - Computer simulation - Flow fields - Hydraulic machinery - Pumping plants - Stators - Turbulence models
Uncontrolled terms: Axial directions - CFD methods - Computational domains - Computational results - Experimental datum - Flow characteristics - Impeller passages - Impeller side chamber - Multiple-reference frames - Numerical simulation - Numerical studies - Performance prediction - Rans equations - Rotor-stator systems - Seal clearance - Velocity profiles - Volute casings
Classification code: 705.1 Electric Machinery, General - 632.2 Hydraulic Equipment and Machinery - 631.1 Fluid Flow, General - 723.5 Computer Applications - 618.2 Pumps - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings - 446 Waterworks
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 281. Accession number: 20092012082962
Title: Wavelet optimization for near-infrared spectra denoising of vitamin c content of umbilical orange
Authors: Xia, Junfang1 ; Li, Xiaoyu1
Author affiliation: 1 Engineering and Technology Department, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Xia, J. (xjf@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 143-146
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: By using db1-db10 (10 in total) wavelet transform with the decomposing level of 4, the near-infrared spectra (NIRS) signals obtained from 120 umbilical orange samples were denoised, the PLS models of vitamin C (VC) content were established by each wavelet base. Through comparing the prediction accuracy of PLS models, it shows that all db wavelet transform can eliminate the noise in VC NIRS effectively, the prediction accuracy of PLS models are higher than models not being treated. When the wavelet was db5, the best prediction effect was obtained, with the correlation coefficient R between the prediction and true values being 0.9427 and the expected variance RMSECV being as low as 2.02 mg/(100 g). In conclusion, the db5 is the best wavelet for NIRS denoising of VC content in umbilical orange.
Number of references: 10
Main heading: Infrared spectroscopy
Controlled terms: Infrared devices - Infrared transmission - Spectrum analysis - Wavelet transforms
Uncontrolled terms: Correlation coefficients - Denoising - Near-infrared spectra - Pls models - Prediction accuracies - Umbilical orange - Vitamin-C - Wavelet base
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.4 Optical Variables Measurements - 941 Acoustical and Optical Measuring Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 921.3 Mathematical Transformations - 921 Mathematics - 741.3 Optical Devices and Systems - 741.1 Light/Optics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 282. Accession number: 20092012082975
Title: Performance analysis for hydrodynamic retarder with different vanes
Authors: Yan, Jun1 ; He, Ren1
Author affiliation: 1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: He, R. (heren1962@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 206-209 226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Hydrodynamic retarder under different vane degree condition was simulated. By using the time-averaged N-S equation and the standard k-Ε turbulence and the SIMPLEC algorithm simultaneously, the internal characteristics of flow field were simulated. The calculated velocity, pressure and turbulent kinetic energy distribution of the turbulent flow in hydrodynamic retarder were given. The method of loss analysis was proposed which changed value of Rothalpy was used to compare the retarder ability. The result shows that the model under 55° vane degree has the biggest impact because the loss of friction and impact made hydrodynamic loss most.
Number of references: 9
Main heading: Fluid dynamics
Controlled terms: Hydrodynamics - Kinetic energy - Navier Stokes equations - Optical losses - Turbulent flow
Uncontrolled terms: Degree conditions - Hydrodynamic loss - Hydrodynamic retarder - Internal characteristics - Loss analysis - N-s equations - Numerical simulatio - Performance analysis - Simplec algorithms - Time-averaged - Turbulent kinetic energy distributions - Vane degree
Classification code: 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.2 Hydrodynamics - 741 Light, Optics and Optical Devices - 921.2 Calculus - 931.1 Mechanics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 307. Accession number: 20092012082938
Title: Multi-objective and multi-criteria decision optimization of automobile suspension parameters
Authors: Wang, Tao1
Author affiliation: 1 Department of Mechanical and Electrical Control Engineering, West Branch, Zhejiang University of Technology, Quzhou 324000, China
Corresponding author: Wang, T. (wangtao76cn@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 4
Issue date: April 2009
Publication year: 2009
Pages: 27-32
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For improving automobile ride comfort, safety and decreasing tire dynamic load to road, the four degree of freedom suspension model was established. MOGA (multi-object genetic algorithm) and multi-criteria decision method were applied to multi-objective optimization of suspension parameters, with root-mean-square values of vertical acceleration of body, front and rear tire load at 50, 80 and 100 km/h on A, B and C level road as objective functions. The results show that on average, root-mean-square value of vertical acceleration of body reduces by 40%, root-mean-square value of dynamic load of front and rear wheel reduces by 30%, and the performance gets better. This method, making decision after searching the Pareto solutions, can help the designer get the best answer under different demand. Compared with the traditional multi-objective optimization method, it is more applicable and effective.
Number of references: 8
Main heading: Suspensions (components)
Controlled terms: Automobile bodies - Automobile suspensions - Dynamic loads - Dynamic programming - Genetic algorithms - Multiobjective optimization - Roads and streets - Vehicle suspensions
Uncontrolled terms: Four degree of freedoms - Making decisions - Multi objectives - Multi-criteria decision - Multi-object genetic algorithm - Objective functions - Pareto solutions - Rear wheels - Ride comforts - Root-mean-square values - Suspension parameters - Suspension system - Tire dynamics - Tire loads - Vertical accelerations
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 663.2 Heavy Duty Motor Vehicle Components - 662.4 Automobile and Smaller Vehicle Components - 632.1 Hydraulics - 601.2 Machine Components - 408.1 Structural Design, General - 406.2 Roads and Streets
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
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