2010年第41卷第6期共收錄43篇
1. Accession number: 20102713063437
Title: Effect prediction model and process optimization of the drying and separating for leaf-stem of fresh chopped alfalfa
Authors: Gao, Yang1 ; Wang, Decheng1 ; Wang, Guanghui1 ; Fang, Xianfa2 ; Ning, Guopeng1 ; Yang, Jie1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Wang, D. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 113-117 162
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: Many factors have effects on the separating ratio, moisture contents of the stems and leaves in fresh chopped alfalfa drying and separating processing. Four major factors: inlet temperature, inlet velocity, rotational speed of rotary drum, and feeding speed were analyzed in leaf-stem separation equipment. A quadratic orthogonal rotation design with 4 factors was introduced to do the regression analysis. Then models were developed and optimized. The results showed that the developed models fit the experiment data well. The inlet temperature affected the drying and separating processing most significantly and then the let velocity, rotational speed of rotary drum, feeding speed, respectively. It was analyzed that the most optimized parameters were 400°C of inlet temperature, 14 m/s of inlet velocity, 12r/min of rotational speed of rotary drum, and 8 kg/min of feeding speed, respectively. Under these conditions, the leaf moisture content was 13.42%, the steam moisture content was 14.24%, and leaf-steam separation ratio was 77.38%.
Number of references: 15
Main heading: Drying
Controlled terms: Feeding - Inlet flow - Mathematical models - Moisture - Moisture determination - Optimization - Process control - Regression analysis - Speed
Uncontrolled terms: Alfalfa - Developed model - Experiment data - Feeding speed - Inlet temperature - Inlet velocity - Leaf moisture - Moisture contents - Optimized parameter - Prediction model - Process optimization - Quadratic orthogonal rotation - Rotary drum - Rotational speed - Separation equipment - Separation ratio
Classification code: 931.1 Mechanics - 922.2 Mathematical Statistics - 921.5 Optimization Techniques - 921 Mathematics - 802.3 Chemical Operations - 944.2 Moisture Measurements - 801.4 Physical Chemistry - 691.2 Materials Handling Methods - 642.1 Process Heating - 631.1 Fluid Flow, General - 443.1 Atmospheric Properties - 731 Automatic Control Principles and Applications
DOI: 10.3969/j.issn.1000-1298.2010.06.022
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
2. Accession number: 20102713063430
Title: Multi-objective dynamic design optimization for air duct of air-assisted boom sprayer based on RVM
Authors: Liu, Xuemei1 ; Zhang, Xiaohui1 ; Liu, Fengle1 ; Ma, Weiwei1
Author affiliation: 1 College of Mechanical and Electrical Engineering, Shandong Agricultural University, Tai'an 271018, China
Corresponding author: Zhang, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 75-80
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To improve the original design flaws of air duct of air-assisted boom sprayer, a multi-objective optimization approach integrated relevance vector machines (RVM), multi-objective genetic algorithms (MOGA) and fuzzy system were presented. First of all, the multi-objectives of the air duct were constructed to improve the capability of reduced spray drift and increased penetration. The computational fluid dynamics (CFD) analysis of air-flow generating duct were utilized for sampling scheme given by uniform design to collect the train dataset. Sequentially, RVM based on meta-model as fitness function was combined with MOGA to obtain the Pareto optimal set. Finally, a fuzzy inference system was established as decision-making support to obtain the optimum preference solution. Therefore, the optimized air duct structure with the round solution analyzed by CFD showed the promising improvement on flow speed variation. The modified physical prototype proofed feasibility and efficiency of this approach.
Number of references: 14
Main heading: Multiobjective optimization
Controlled terms: Air - Computational fluid dynamics - Decision making - Ducts - Function evaluation - Fuzzy inference - Fuzzy sets - Genetic algorithms - Machine design
Uncontrolled terms: Air duct of air-assisted - Air ducts - Boom sprayer - Dynamic design - Multi objective - Multi-objective genetic algorithm - Relevance Vector Machine
Classification code:723.5 Computer Applications - 804 Chemical Products Generally - 912.2 Management - 723.4.1 Expert Systems - 921 Mathematics - 921.6 Numerical Methods - 931.1 Mechanics - 921.5 Optimization Techniques - 723 Computer Software, Data Handling and Applications - 619.1 Pipe, Piping and Pipelines - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 601 Mechanical Design - 641.2 Heat Transfer - 643.4 Air Conditioning Equipment and Components - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 643.2 Space Heating Equipment and Components
DOI: 10.3969/j.issn.1000-1298.2010.06.015
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
3. Accession number: 20102713063429
Title: Spraying performance of the direct injection variable-rate sprayer
Authors: Hu, Kaiqun1 ; Zhou, Zhou2 ; Qi, Lijun1 ; Wang, Xiu3 ; Ji, Ronghua4
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Guangzhou Shipyard International Company Limited, Guangzhou 510328, China
3 Beijing Agricultural Information Research Center, Beijing 100097, China
4 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Qi, L. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 70-74 102
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 CAN bus and ISO11783 protocol, a direct injection variable-rate sprayer based on the prescription map was developed with the goal of realizing precision pesticide application and improving pesticide application efficiency. The spraying uniformity and accuracy of the direct injection variable-rate sprayer was analyzed through the comparison experiments between constant-rate spraying and variable-rate spraying. The field experiments showed that the spraying variable coefficient was below 10%. On a given field, the area, on which the spray volume difference between the actual spray volume and the volume supposed was less than 15%, was up to 86% of the total.
Number of references: 14
Main heading: Pesticides
Uncontrolled terms: Direct injection - Performance analysis - Prescription map - Spraying uniformity - Variable rate
Classification code: 803 Chemical Agents and Basic Industrial Chemicals - 821.2 Agricultural Chemicals
DOI: 10.3969/j.issn.1000-1298.2010.06.014
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
4. Accession number: 20102713063418
Title: Steering control strategy of high-speed hydrostatic drive tracked vehicle
Authors: Yang, Lei1 ; Ma, Biao1 ; Li, Heyan1
Author affiliation: 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Yang, L. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 14-19
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Steering control was the principal problem and technological challenge for hydrostatic drive tracked vehicle. Considering steering safety and maximum system pressure limitation, the relative steering ratio dependence of the speed was discussed based on the analysis of steering kinematics and dynamics. A steering dynamic system model was developed by Simulink of Matlab, and steering control strategy for tracked vehicle with hydrostatic drive was also designed. This steering control strategy can preferentially achieve the driver's expected steering radius exactly by reducing average vehicle speed in the case of not exceeding the system pressure threshold and no sideslip.
Number of references: 10
Main heading: Automobile steering equipment
Controlled terms: Automobile parts and equipment - Dynamical systems - Hydraulics - Hydrodynamics - Model structures - Speed - Steering - Tracked vehicles
Uncontrolled terms: Control strategies - High-speed - Hydrostatic drive - Hydrostatic drives - Kinematics and dynamics - Simulink - Steering control - Steering dynamics - Steering radius - Steering ratio - Steering safety - System pressure - Technological challenges - Vehicle speed
Classification code:931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 921 Mathematics - 671.2 Ship Equipment - 663.2 Heavy Duty Motor Vehicle Components - 663 Buses, Tractors and Trucks - 662.4 Automobile and Smaller Vehicle Components - 632.1 Hydraulics - 631.2 Hydrodynamics - 631.1.1 Liquid Dynamics - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.003
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
5. Accession number: 20102713063451
Title: Design of WSN gateway notes for remote detection of orchards environment parameters
Authors: He, Dongjian1 ; Zou, Zhiyong1 ; Zhou, Man1
Author affiliation: 1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: He, D. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 182-186
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 the remote detection of orchard environmental parameters, gateway nodes suffer from two deficiencies that remain to be solved: short transmission distance of ZigBee module due to electromagnetic interference; failure to meet the dynamic configuration of ZigBee network. The hardware design adopted the structure of kernel board plus motherboard and modularized interface to improve anti-electromagnetic interference performance. The software design adopted two strategies, i.e. serial programming and single thread communication, to realize dynamic configuration of ZigBee network. To reduce energy consumption of the system, gateway nodes decided whether to upload data according to the difference between consecutively-received data and the variation tendency. The test results indicated that gateway nodes could realize stable data acquisition and remote data transmission. Due to the improvement of anti-electromagnetic interference performance, communication distance was doubled compared with the design of integrated circuits board. Moreover, the ZigBee network could be configured flexibly and dynamically.
Number of references: 16
Main heading: Gateways (computer networks)
Controlled terms: Design - Electromagnetic pulse - Electromagnetic wave interference - Electromagnetism - Magnetic materials - Orchards - Sensor networks - Signal interference - Software design - Wireless sensor networks
Uncontrolled terms: Anti-electromagnetic - Communication distance - Dynamic configuration - Electromagnetic interference - Energy consumption - Environmental parameter - Gateway nodes - Hardware design - Modularized - Remote data - Remote detection - Test results - Transmission distances - Zig-Bee - ZigBee networks
Classification code:902.1 Engineering Graphics - 722.3 Data Communication, Equipment and Techniques - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 723.5 Computer Applications - 731.1 Control Systems - 732 Control Devices - 821.3 Agricultural Methods - 718 Telephone Systems and Related Technologies; Line Communications - 408 Structural Design - 701 Electricity and Magnetism - 708.4 Magnetic Materials - 717 Optical Communication - 711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television
DOI: 10.3969/j.issn.1000-1298.2010.06.036
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
6. Accession number: 20102713063416
Title: Real-time rollover prediction for vehicle based on principles of sliding mode and fuzzy inference system
Authors: Wang, Jian1 ; Yu, Guizhen1 ; Zhang, Wei1 ; Ding, Nenggen1
Author affiliation: 1 School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
Corresponding author: Yu, G. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
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: This paper presented a real-time rollover prediction algorithm based on roll state estimator. An extended 3-DOF vehicle model considering tire nonlinear characteristics was firstly proposed, the parameters of the tire model were obtained by using nonlinear least square method. Vehicle roll state was estimated using sliding mode(SM) observer based on the super twisting algorithm. A rollover critical index(RCI), which indicated the risk of rollover, was developed by a fuzzy inference system(FIS) based on current vehicle state and its trend. The veDYNA dynamic simulation software was used to verify the performances of roll state estimator and roll motion prediction.
Number of references: 13
Main heading: Vehicles
Controlled terms: Algorithms - Computer simulation - Computer software - Forecasting - Fuzzy inference - Fuzzy systems - Least squares approximations - Sliding mode control - State estimation
Uncontrolled terms: Critical indices - Dynamic simulation - Fuzzy inference systems - Nonlinear characteristics - Nonlinear least square methods - On currents - Prediction algorithms - Roll motions - Rollover prediction - Sliding mode observers - Sliding modes - State Estimators - Super twisting algorithm - Tire models - Vehicle model - Vehicle state
Classification code:961 Systems Science - 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 912.2 Management - 731.1 Control Systems - 723.5 Computer Applications - 723.4.1 Expert Systems - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 432 Highway Transportation
DOI: 10.3969/j.issn.1000-1298.2010.06.001
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
7. Accession number: 20102713063425
Title: Finite element analysis for gap disc of no-till planter
Authors: Yang, Fan1 ; Li, Wenying1 ; Li, Hongwen1 ; Su, Yanbo1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, W. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 53-55 80
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 obtain better anti-blocking device on no-till planter, a finite element analysis on gap disc with ANSYS was conducted. Through element type selecting and material properties setting, ANSYS could transfer gap disc image into mesh size and generate a finite element model, in which loadings consisted of straw-cutting resistance and soil-penetrating resistance. Then the gap disc model was calculated, a series figure of different components of stress was obtained. Theoretical basis of further modification and optimization for gap disc was given.
Number of references: 8
Main heading: Finite element method
Controlled terms: Geologic models
Uncontrolled terms: Cutting resistance - Element type - Finite element analysis - Finite element models - Material property - Mesh size - No-till planter - No-till planters - Strength analysis - Theoretical basis - Transfer gap
Classification code: 481.1 Geology - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.06.010
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
8. Accession number: 20102713063423
Title: Technological development of agricultural tractor
Authors: Zhao, Yanshui1 ; Yang, Weimin2
Author affiliation: 1 YTO Group Corporation, Luoyang 471004, China
2 Luoyang Tractor Research Institute, Luoyang 471039, China
Corresponding author: Zhao, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 42-48
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: This paper aimed at the technological development of agricultural tractor in the world. The current technology and performance of the vehicles and parts were explained. The technology characteristics and configuration of the agricultural tractors in each power range were summarized and analyzed. Finally, the technical development and disadvantages of Chinese agricultural tractors were analyzed and the key technologies were proposed.
Number of references: 23
Main heading: Tractors (agricultural)
Controlled terms: Technological forecasting - Technology - Tractors (truck)
Uncontrolled terms: Agricultural tractors - Current technology - Development technology - Key technologies - Power range - Technical development - Technological development
Classification code: 663.1 Heavy Duty Motor Vehicles - 821.1 Agricultural Machinery and Equipment - 901 Engineering Profession - 901.4 Impact of Technology on Society
DOI: 10.3969/j.issn.1000-1298.2010.06.008
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
9. Accession number: 20102713063436
Title: Drift of the temperature-controlled instrument for the farm products storage
Authors: Zhang, Daohui1 ; Zhao, Hongjun2 ; Zhou, Guangfang1 ; Zong, Xiaojuan1 ; Shen, Guangning1 ; Liu, Qingzhong1
Author affiliation: 1 Shandong Institute of Pomology, Taian 271000, China
2 Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Corresponding author: Liu, Q. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 108-112
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: Three typical farm products storage systems were adopted to detect the temperature drifts respectively. The cell circuit was improved according to the designing principal of the instrument electrocircuit. As the results, the error of the storage temperature was dramatically reduced from 3.5°C to 0.3°C and the cold storage temperature fluctuations decreased from 5.3°C to 1.4°C. Besides, three simple temperature compensation methods were also selected. These methods were applicable to those places which were unsuitable for the instrument circuit improvement.
Number of references: 20
Main heading: Instruments
Controlled terms: Cold storage - Temperature distribution
Uncontrolled terms: Cell circuits - Inhibition - Storage - Storage systems - Storage temperatures - Temperature compensation - Temperature drifts
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 694.4 Storage - 644.3 Refrigeration Equipment and Components - 641.1 Thermodynamics
DOI: 10.3969/j.issn.1000-1298.2010.06.021
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
10. Accession number: 20102713063452
Title: CAD/CAE integration and stepwise regression model of machine tool mechanism
Authors: Wei, Wei1 ; Zhang, Lianhong1 ; Xu, Yanwei1 ; Liu, Dequan2
Author affiliation: 1 School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
2 Tianjin No.1 Machine Tool Works, Tianjin 300180, China
Corresponding author: Wei, W. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 187-192
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: A CAD/CAE integration analytical method of machine tool mechanism was proposed based on the 3-D design software Solid Works and the finite element analysis software ABAQUS, the CAD/CAE integration and automatic computation were realized by integrating the parametric modeling function of CAD and the finite element analysis function of CAE. Stepwise regression modeling based on Latin hypercube sampling and CAD/CAE integration was also proposed to improve the modeling efficiency of machine tool structural performance, it could reduce the samples and ensure the modeling accuracy by monitoring the stepwise regression model. The CAD/CAE integration analysis and stepwise regression model were carried out on spiral bevel gear milling machine, and proved to be feasible.
Number of references: 8
Main heading: Integration
Controlled terms: Bevel gears - Computer aided design - Computer software - Finite element method - Geometry - Machine design - Machine tools - Machinery - Milling (machining) - Milling machines - Regression analysis - Software design - Structural optimization - Three dimensional - Tools
Uncontrolled terms: CAD/CAE - CAD/CAE integration - Latin hypercube sampling - Optimum structure - Spiral bevel gears - Stepwise regression
Classification code: 723.5 Computer Applications - 902.1 Engineering Graphics - 921 Mathematics - 921.2 Calculus - 921.5 Optimization Techniques - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 723.1 Computer Programming - 601 Mechanical Design - 601.2 Machine Components - 603 Machine Tools - 603.1 Machine Tools, General - 604.2 Machining Operations - 605 Small Tools and Hardware - 723 Computer Software, Data Handling and Applications
DOI: 10.3969/j.issn.1000-1298.2010.06.037
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
11. Accession number: 20102713063446
Title: Design of fruit harvesting robot based on stereo vision
Authors: Zhou, Jun1 ; Liu, Rui1 ; Zhang, Gaoyang1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Zhou, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 158-162
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 automatic picking system of fruit harvesting robot was designed based on stereo vision. Firstly, the fruit objects were recognized in image space by using the Hough transform. Some pixels of each object obeying the uniform distribution in the image space were sampled randomly. Then the sphere model of fruit was constructed in 3-D space with these pixels, and the coordinates of the center of each fruit object were obtained directly. Secondly, hand-eye calibration was carried out through the least square method. Finally, the path planning of the harvesting robot was analyzed simply. Experimental results showed that the effects of the partial occlusion and invalidation of stereo matching in the presence of complex scene on the automatic picking system was weakened, and the positioning accuracy of the fruit object was less than 8 mm. Therefore the reliability and precision of fruit gripping were improved significantly.
Number of references: 12
Main heading: Stereo vision
Controlled terms: Calibration - Eye controlled devices - Fruits - Harvesting - Hough transforms - Least squares approximations - Machine design - Pixels - Robot programming - Robots - Spheres - Three dimensional - Wavelet transforms
Uncontrolled terms: 3-D space - Automatic picking - Complex scenes - Fruit harvesting - Fruit harvesting robot - Hand-eye calibration - Harvesting robot - Image space - Least square methods - Partial occlusions - Path-planning - Positioning accuracy - Sphere model - Stereo matching - Uniform distribution
Classification code: 821.3 Agricultural Methods - 821.4 Agricultural Products - 902.1 Engineering Graphics - 902.2 Codes and Standards - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921.3 Mathematical Transformations - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 921.6 Numerical Methods - 742.2 Photographic Equipment - 741.2 Vision - 461.5 Rehabilitation Engineering and Assistive Technology - 601 Mechanical Design - 631 Fluid Flow - 722.2 Computer Peripheral Equipment - 723.1 Computer Programming - 723.5 Computer Applications - 731.5 Robotics - 731.6 Robot Applications
DOI: 10.3969/j.issn.1000-1298.2010.06.031
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
12. Accession number: 20102713063424
Title: In situ testing on soil erosion of grassland surface in the northern farming-pastoral zone
Authors: Sun, Yuechao1 ; Ma, Shuoshi2 ; Chen, Zhi2 ; Zhao, Yonglai1 ; Dong, Mei2
Author affiliation: 1 College of Vocational and Technical, Inner Mongolia Agricultural University, Baotou 014109, China
2 College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
Corresponding author: Chen, Z. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 49-52 60
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to quantitative evaluate the wind erosion effect of wind speed in wind tunnel center, vegetation coverage and their interaction, orthogonal experimental design and wind tunnel testing in situ field was adopted. The soil erosion experiment of grassland was completed. Test results were analyzed by using grey correlation, range analysis and partial least-square regression theory. The results showed that the sequence of factors influencing on sediment transport rate from larger to little was the center wind speed of wind tunnel, vegetation coverage, their interaction.
Number of references: 21
Main heading: Wind tunnels
Controlled terms: Aerodynamics - Sediment transport - Soil mechanics - Soil testing - Soils - Surface testing - Vegetation - Wind effects
Uncontrolled terms: Grey correlation - In-situ - In-situ test - In-situ testing - Orthogonal experimental design - Partial least-square regression - Range analysis - Sediment transport rate - Soil erosion - Test results - Vegetation coverage - Wind erosions - Wind speed - Wind-tunnel testing
Classification code: 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 651.2 Wind Tunnels - 651.1 Aerodynamics, General - 631.3 Flow of Fluid-Like Materials - 525.1 Energy Resources and Renewable Energy Issues - 483.1 Soils and Soil Mechanics - 461.9 Biology - 443.1 Atmospheric Properties - 423.2 Test Methods - 422.1 Test Equipment - 408.1 Structural Design, General
DOI: 10.3969/j.issn.1000-1298.2010.06.009
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
13. Accession number: 20102713063449
Title: Application of Butterworth filter for testing grain cleaning loss
Authors: Ni, Jun1 ; Mao, Hanping1 ; Zhang, Xiaodong1 ; Cheng, Xiuhua1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Mao, H. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 172-176
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 problems about extracting cleaning signals in the heavy noise and its hardware implementation were discussed. The Butterworth filter was proposed to distinguish the vibration noise and the grain signals. The lowest order of filter to meet performance was determined according to its transition region width and stop-band attenuation. An 8-order Butterworth filter used VCVS topology structure as basic units was constructed by class-bind method. Analogue simulation of the high order filter was proceeding on EWB and refining test was proceeding on the combine. Experimental results was well coincided with simulation results and showed good filtering property in extracting grain signals in the heavy noise of combine.
Number of references: 12
Main heading: Signal processing
Controlled terms: Cleaning - Hardware - IIR filters
Uncontrolled terms: Butterworth filter - Class-bind - Filtering properties - Hardware implementations - High order filters - Simulation result - Stopband - Topology structure - Transition regions - Vibration noise
Classification code: 605 Small Tools and Hardware - 703.2 Electric Filters - 716.1 Information Theory and Signal Processing - 802.3 Chemical Operations
DOI: 10.3969/j.issn.1000-1298.2010.06.034
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
14. Accession number: 20102713063454
Title: Definition evaluation of auto focus in micro-vision based on the macro-micro dual-drive
Authors: Yu, Baojun1 ; Yang, Zhigang2 ; Tian, Fengjun2 ; Dong, Jingshi2 ; Jiang, Bin3
Author affiliation: 1 School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
3 Department of Aviation Theory, Aviation University of Air Force, Changchun 130022, China
Corresponding author: Yang, Z. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 199-203
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 avoid small field-of-view and limited depth-of-field of micro-vision, image definition based on gradient field and wavelet transformation was used. Microscope was set on the macro-micro dual-drive table in order to ensure the positioning precision. A selective focusing technique was developed to auto focus on the objects in different depth. Closed-loop feedback control was carried out. Experimental results showed that dynamic performance and stability of the system was satisfied, the response velocity of system increased from 0.3s-1 to 3s-1, meanwhile, collision-avoidance was executed according to vertical position relations computed by image definition.
Number of references: 12
Main heading: Dynamic response
Controlled terms: Wavelet transforms
Uncontrolled terms: Auto focus - Closed-loop feedback control - Depth of field - Dynamic performance - Field of views - Focusing technique - Gradient fields - Image definition - Macro-micro dual-drive - Micro-vision - Positioning precision - Response velocity - Vertical positions - Wavelet transformations
Classification code: 408.1 Structural Design, General - 921.3 Mathematical Transformations
DOI: 10.3969/j.issn.1000-1298.2010.06.039
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
15. Accession number: 20102713063448
Title: Design of PVDF sensor array for grain loss measuring
Authors: Zhou, Liming1 ; Zhang, Xiaochao1 ; Liu, Yangchun2 ; Yuan, Yanwei2
Author affiliation: 1 Institute of Mechatronics Technology and Application, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
2 State Key Laboratory of Soil, Plant and Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Zhang, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 167-171
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 online monitoring of grain loss was important for improving the effect of harvest. Based on the requirement of measurement, the polyvinyliden fluoride(PVDF) piezoelectric-film was applied to develop a novel grain loss sensor array. The design of conditioning circuit was also discussed. The spatial distribution of grain loss could be easily obtained by proposed sensor array. Three kinds of full rice seeds with different moisture were prepared for the experiment, and the results indicated the measuring error of the sensor were within 5%.
Number of references: 12
Main heading: Moisture control
Controlled terms: Grain (agricultural product) - Harvesters - Sensor arrays - Size distribution
Uncontrolled terms: Array sensors - Combine harvester - Combine harvesters - Conditioning circuit - Grain - Measuring errors - Online monitoring - PVDF sensor - Rice seed - Spatial distribution
Classification code: 944.2 Moisture Measurements - 933.1 Crystalline Solids - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 732 Control Devices - 731.3 Specific Variables Control - 716 Telecommunication; Radar, Radio and Television - 531.2 Metallography - 423 Non Mechanical Properties and Tests of Building Materials
DOI: 10.3969/j.issn.1000-1298.2010.06.033
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
16. Accession number: 20102713063441
Title: Effects of different pulping conducts on mechanical properties of celery paper
Authors: Yang, Chuanmin1 ; Wang, Xinyu1 ; Kou, Jinbao1
Author affiliation: 1 School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Corresponding author: Yang, C. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 133-136 152
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: Effects of different pulping conducts on mechanical properties of celery paper were analyzed in order to raise the tensile strength. Four kinds of combined pulping conduct were organized and four types of sample celery paper were prepared under the condition of middle scale production. Several reports of fiber analyses were given by Swedish L&W fiber tester. The structure characteristics of celery paper were presented through the photograph of Olympus microscope. Mechanical property reports were issued by authorized department. After analysis of fiber and structure as well as property, the maximum tensile strength was 1.765 times as much as the minimum among four types of sample celery paper. Therefore different mechanical pulping conducts really could raise tensile strength of celery paper.
Number of references: 8
Main heading: Mechanical properties
Controlled terms: Columns (structural) - Fibers - Paper - Photography - Structural properties - Tensile strength - Vegetables
Uncontrolled terms: Celery - Mechanical pulping - Olympus - Pulping - Structure characteristic - W-fibers
Classification code: 951 Materials Science - 931.1 Mechanics - 821.4 Agricultural Products - 819.4 Fiber Products - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 811.1 Pulp and Paper - 746 Imaging Techniques - 742.1 Photography - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.026
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
17. Accession number: 20102713063458
Title: Weld shapes prediction and grain size prediction of deep-drawing laser tailor-welded blank
Authors: Li, Xincheng1 ; Feng, Xiaotian1 ; Zhu, Weixing2 ; Chen, Wei1 ; Li, Dadong3
Author affiliation: 1 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
3 Panzhihua Iron and Steel Group, Panzhihua 617000, China
Corresponding author: Li, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 222-226
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 weld shapes of St12 and St16 deep-drawing steels were influenced by transient temperature distributions. Based on the influence of temperature dependence, latent heat of fusion, convection and radiation, the weld shapes prediction model was built. Additionally, the first and last nodes control method was used in heat loading in order to make sure all nodes could be selected. Experimental results showed that there were no significant differences between the predictive and actual weld shapes. Furthermore, multiple regression prediction models of grain size in weld and heat affected zone (HAZ) were put forward based on PLS. The prediction accuracy of grain size in weld and HAZ was above 95%. Therefore, the proposed models are reasonable and applicable to examine deep-drawing steel for demonstrative purposes.
Number of references: 6
Main heading: Welding
Controlled terms: Control theory - Deep drawing - Forecasting - Grain size and shape - Heat affected zone - Mathematical models - Metal drawing - Temperature distribution
Uncontrolled terms: Control methods - Grain size - Grain size prediction - Tailor-Welded Blanks - Weld shape
Classification code: 922.2 Mathematical Statistics - 921 Mathematics - 912.2 Management - 801.4 Physical Chemistry - 933.1.1 Crystal Lattice - 731.1 Control Systems - 538.2 Welding - 535.2 Metal Forming - 531.2 Metallography - 641.1 Thermodynamics
DOI: 10.3969/j.issn.1000-1298.2010.06.043
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
18. Accession number: 20102713063443
Title: Ultrahigh pressure molding and texture analysis on salty egg-yolk
Authors: Du, Bing1 ; Xia, Yu1 ; Li, Yanjie1 ; Zhang, Yanjie2 ; Wu, Haixiong2 ; Yang, Gongming1
Author affiliation: 1 College of Food Science, South China Agricultural University, Guangzhou 510642, China
2 The Ju Xiangyuan Health Food (Zhongshan) Co., Ltd, Zhongshan 528436, China
Corresponding author: Yang, G. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 142-146 186
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 ultrahigh pressure technology was used to make yolk rapidly denaturalize and molded. It could effectively solve those problems such as material's utilization lowing, the processing period's long, and so on. Taking the fresh egg-yolk as raw material, it was molded by ultrahigh pressure in salt solution. The influence on salty egg-yolk's quality by the immersion times, the pressures and presses times was researched separately. Orthogonal test was used to discuss the optimal technological conditions. The results of optimal processing technology were as follows: the yolk could be rapidly molded when it was immersed at room temperature for 4 hour and kept under 400 MPa pressure for 15minutes. The molding salty egg-yolks achieved the standard of salty egg-yolk which could be used in moon cake. The texture analysis results indicated: the texture index of ultrahigh salty egg-yolk was better than quickly salty egg-yolk. The mastication index had the best improvement. The coherency and adhesiveness had better improvement. Therefore, the salty egg-yolk could be molding by ultrahigh pressure technology.
Number of references: 15
Main heading: Molding
Controlled terms: Optimization - Technology - Textures
Uncontrolled terms: Optimal processing - Orthogonal test - Room temperature - Salt solution - Technological conditions - Texture analysis - Ultra-high pressure technology - Ultrahigh pressure
Classification code: 535.2 Metal Forming - 816.1 Processing of Plastics and Other Polymers - 818.3 Rubber and Elastomer Processing - 901 Engineering Profession - 921.5 Optimization Techniques - 933 Solid State Physics
DOI: 10.3969/j.issn.1000-1298.2010.06.028
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
19. Accession number: 20102713063457
Title: Cushion process of the hydraulic cylinder of hydraulic operating mechanism for high voltage circuit breaker
Authors: Wei, Zhongyong1 ; Zhao, Hongfei2 ; Liu, Wei1 ; Xu, Bing1 ; Yang, Huayong1
Author affiliation: 1 State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
2 Henan Pinggao Electric Co., Ltd, Pingdingshan 467001, China
Corresponding author: Xu, B. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 216-221
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: Cushion structure of high-speed cylinder of the 550kV high voltage circuit breakers was analyzed. The flow characteristics of the cushion structure were estimated by Reynolds number and a simulation model was built with the results of CFD analysis. Pressure, velocity and displacement characteristics of the cylinder were simulated. The simulation results and the test results were compared. It indicated that the simulation method was effective and the simulation model was accurate. Dynamic characteristics of the cushion process of high speed hydraulic cylinder were revealed, and reasons for high peak pressure and high end-velocity were pointed out. The proposed method could help the optimization of cushion structure.
Number of references: 6
Main heading: Computer simulation
Controlled terms: Capacitance - Circuit breaking arcs - Computational fluid dynamics - Cylinders (shapes) - Electric circuit breakers - Electricity - Experiments - Hydraulic equipment - Hydraulic servomechanisms - Hydraulic structures - Hydraulics - Reynolds equation - Reynolds number - Speed - Structural optimization
Uncontrolled terms: CFD analysis - Displacement characteristic - Dynamic characteristics - Flow characteristic - High voltage circuit breaker - High-speed cylinder - High-speed hydraulics - Hydraulic cylinders - Hydraulic operating mechanisms - Peak pressure - Simulation methods - Simulation model - Simulation result - Test results
Classification code: 704 Electric Components and Equipment - 704.2 Electric Equipment - 706.2 Electric Power Lines and Equipment - 723.5 Computer Applications - 732.1 Control Equipment - 901.3 Engineering Research - 921.2 Calculus - 921.5 Optimization Techniques - 921.6 Numerical Methods - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 703.1 Electric Networks - 407.2 Waterways - 408.2 Structural Members and Shapes - 441 Dams and Reservoirs; Hydro Development - 446.2 Related Hydraulic Structures - 611 Hydroelectric and Tidal Power Plants - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 632.1 Hydraulics - 632.2 Hydraulic Equipment and Machinery - 701.1 Electricity: Basic Concepts and Phenomena
DOI: 10.3969/j.issn.1000-1298.2010.06.042
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
20. Accession number: 20102713063442
Title: Process and kinetics of supercritical fluid extraction for soybean isoflavones
Authors: Pan, Lihua1 ; Luo, Jianping1
Author affiliation: 1 School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Luo, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 137-141
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 optimal conditions of supercritical fluid extraction were obtained as follows, CO2 flow rate of 8 L/h, static extraction time of 120 min, dynamic extraction time of 60min, entrainer ethanol dosage of 3 mL/g defatted soybean residues, extraction temperature of 55°C and extraction pressure of 30 MPa, by single factor test and four factors and three levels orthogonal design method. The kinetic model of supercritical fluid extraction accurately described the distribution of isoflavone genistin in the extraction bed was developed based on adsorption and desorption theory. The model parameter kLa was determined by BP neural network and trial and error method.
Number of references: 10
Main heading: Neural networks
Controlled terms: Adsorption - Desorption - Effluent treatment - Ethanol - Supercritical fluid extraction - Supercritical fluids
Uncontrolled terms: Dynamics model of extraction - Dynamics models - Genistin - Isoflavones - Soybean isoflavone
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 804.1 Organic Compounds - 802.3 Chemical Operations - 723.4 Artificial Intelligence - 523 Liquid Fuels - 461.1 Biomedical Engineering - 452.4 Industrial Wastes Treatment and Disposal
DOI: 10.3969/j.issn.1000-1298.2010.06.027
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
21. Accession number: 20102713063440
Title: Modeling and evaluation of infrared radiation drying for apple slices
Authors: Lin, Xi'na1 ; Wang, Xiangyou1
Author affiliation: 1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author: Wang, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 128-132
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 traditional drying models fitted to experimental data and the drying coefficients were determined by means of nonlinear least square based on the Matlab software using the GaussNewton algorithm. The experimental data from infrared radiation drying of apple slices were used as measured samples. The tests were performed with the materials temperature of 60°C, the radiation power of 750 W, the radiation distances of 100mm and materials thickness of 5 mm. 15 different mathematical drying models were compared by some evaluation targets such as coefficient of determination (R2), square sum of error (SSE) and root mean square error (RMSE). It showed that the Modified Page equation-II model could sufficiently predict and control the infrared radiation drying process of apple slices.
Number of references: 15
Main heading: Infrared drying
Controlled terms: Curing - Infrared radiation - Mathematical models - Radiation - Radiometers - Regression analysis
Uncontrolled terms: Apple - Apple slices - Coefficient of determination - Drying model - Drying process - Experimental data - Gauss-Newton algorithm - Matlab- software - Non-linear least squares - Radiation power - Root mean square errors - Square sum
Classification code: 944.7 Radiation Measuring Instruments - 922.2 Mathematical Statistics - 921 Mathematics - 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 - 657.1 Solar Energy and Phenomena - 642.1 Process Heating
DOI: 10.3969/j.issn.1000-1298.2010.06.025
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
22. Accession number: 20102713063438
Title: Model establishment and process optimization of vacuum drying of Cornus officinalis
Authors: Liu, Yunhong1, 2 ; Zhu, Wenxue2 ; Ma, Haile1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 Food and Bioengineering Department, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author: Liu, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 118-122
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 influence of drying temperature and pressure in the chamber on the drying characteristics of vacuum drying on Cornus officinalis was studied. The regression mathematical models of drying time and content of loganin versus drying temperature and pressure were established. The optimal combination of the parameters for vacuum drying of Cornus officinalis was obtained through nonlinear optimization method with multiple targets. The results showed that the regression mathematical models agreed well with the experimental data, and under the conditions of drying temperature 68.1°C and pressure 1kPa, the optimal integrative values were obtained as drying time 248min and content of loganin 1.19%, respectively.
Number of references: 10
Main heading: Mathematical models
Controlled terms: Curing - Drying - Optimization - Process control - Vacuum
Uncontrolled terms: Drying characteristics - Drying temperature - Drying time - Experimental data - Multiple targets - Nonlinear optimization methods - Optimal combination - Process optimization - Vacuum drying
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 731 Automatic Control Principles and Applications - 642.1 Process Heating - 633 Vacuum Technology
DOI: 10.3969/j.issn.1000-1298.2010.06.023
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
23. Accession number: 20102713063435
Title: Predictive mathematical model for storage quality of Agaricus Bisporus
Authors: Wang, Xiangyou1 ; Zhu, Jiying1 ; Li, Xia1
Author affiliation: 1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author: Wang, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 103-107 112
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 storage test was carried out to evaluate the effects of temperature and relative humidity (RH) on the storage quality of Agricus bisporus, and mathematical models were established. Models of the storage quality of Agricus bisporus in terms of temperature were M=(1.3949 0.3519 T)t and F=(2.4153-0.0204 T 0.0225 T2)t, which developed from the slopes of weight loss and firmness versus time for five temperatures (0, 3, 6, 9, 12°C) and 95%RH. Models of the storage quality of Agricus bisporus in terms of RH were Mr=(61.0605-124.8105RH 63.985HR2)t and Fr=(9.6579-11.7530RH 4.2651RH2)t, which developed from the slopes of weight loss and firmness versus time for five relative humidity and 2°C. Study results suggested that, the quality deterioration of Agricus bisporus during storage was well described by the obtained models, and agreed well with the experiment data. Results of the study can be applied to the storage of Agaricus bisporus.
Number of references: 13
Main heading: Mathematical models
Controlled terms: Atmospheric humidity - Moisture - Temperature
Uncontrolled terms: Agaricus bisporus - Agricus bisporus - Bisporus - Effects of temperature - Experiment data - Relative humidities - Storage quality - Storage tests - Weight loss
Classification code: 443.1 Atmospheric Properties - 641.1 Thermodynamics - 801.4 Physical Chemistry - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.06.020
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
24. Accession number: 20102713063433
Title: Step-wise catalytic pyrolysis of fir using pyrolysis-gas chromatography/mass spectrometry
Authors: Chang, Sheng1, 2 ; Zhao, Zengli1 ; Zheng, Anqing1 ; Li, Haibin1
Author affiliation: 1 Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2 Graduate University, Chinese Academy of Sciences, Beijing 100039, China
Corresponding author: Zhao, Z. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 93-97 132
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: Step-wise pyrolysis of fir was conducted in the presence of catalysts by using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The effects of catalysts and temperature on composition and content of the pyrolysis products were studied. The results showed that few types of the products were found in the first-step 300°C pyrolysis and the main products were extractives, while a great variety of products were detected in the second-step 500°C pyrolysis. ZSM5 and MCM41 could reduce the contents of carbonyls and macromolecular lignin derivatives. ZSM5 catalyst was helpful to reduce the content of acetic acid, and produced lots of aromatic hydrocarbons in the pyrolysis products. The content of acetic acid and furfural in the prolysis products were obviously increased by the presence of MCM41 catalyst.
Number of references: 15
Main heading: Pyrolysis
Controlled terms: Acetic acid - Acids - Aldehydes - Aromatic hydrocarbons - Catalysts - pH effects - Spectrometry
Uncontrolled terms: Catalytic pyrolysis - Fir - Lignin derivatives - Pyrolysis products - Pyrolysis-gas chromatography/mass spectrometry - Pyrolysis-gas chromatography/mass spectrometry (py-GC/MS) - ZSM-5 catalysts
Classification code: 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 941.4 Optical Variables Measurements - 802.2 Chemical Reactions - 801 Chemistry - 741.3 Optical Devices and Systems - 801.1 Chemistry, General
DOI: 10.3969/j.issn.1000-1298.2010.06.018
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
25. Accession number: 20102713063419
Title: Stewart platform vibration control strategy based on dynamics
Authors: Yang, Yu1 ; Zheng, Shutao1 ; Han, Junwei1
Author affiliation: 1 School of Mechanics Engineering, Harbin Institute of Technology, Harbin 150001, China
Corresponding author: Yang, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 20-24
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: With heavy load and high center of gravity, the Stewart platform based on kinematics control strategy vibrated in one degree of freedom will cause the vibration in other degrees of freedom. To solve this problem, a vibration control strategy used in the position closed loop was presented based on the Stewart platform dynamics. According to this control strategy, the actuator force, calculated by the dynamics model, was used to control the platform vibration, and the control precision was improved. At last this vibration control strategy was validated with the Stewart platform in 15°pitch posture. Comparing the vibration response of the Stewart platform controlled by kinematics and dynamics respectively, the results showed that the proposed control strategy could reduce the coupling vibration caused by the platform load effectively, and could achieve the precise vibration control in any platform pose.
Number of references: 12
Main heading: Simulators
Controlled terms: Dynamics - Kinematics - Roads and streets - Vibration control
Uncontrolled terms: Center of gravity - Closed loops - Control precision - Control strategies - Coupling vibration - Degree of freedom - Degrees of freedom - Dynamics models - Heavy loads - Kinematics and dynamics - Kinematics control - Multi-body dynamic - ON dynamics - Shaking tables - Stewart platforms - Vibration - Vibration response
Classification code: 931.1 Mechanics - 731.3 Specific Variables Control - 671 Naval Architecture - 662.1 Automobiles - 657.1 Solar Energy and Phenomena - 655.2 Satellites - 654.1 Rockets and Missiles - 621 Nuclear Reactors - 406.2 Roads and Streets
DOI: 10.3969/j.issn.1000-1298.2010.06.004
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
26. Accession number: 20102713063427
Title: Digital design of vegetable transplanter based on UG and VB.NET
Authors: Zhang, Guofeng1 ; Wang, Junjun1 ; Chen, Jianneng1 ; Zhao, Yun1
Author affiliation: 1 Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
Corresponding author: Zhao, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 61-64 86
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: Series design of transplanting parts of vegetable transplanter was achieved by the digital design based on UG and VB.NET. First of all, mathematical model of rotary ordered transplanter was established. 3-D model of parts and virtual assembly of transplanting device were completed with UG software. By means of VB.NET and secondary development tools UGOPEN in UG, special custom menu items were added in UG software; the user could input or change relevant parameters based on agronomic requirements of different vegetables, then 3-D model of the corresponding mechanism was automatically generated to achieve digital variant design of transplanting device. The results showed that this digital design method shortened design cycle and improved design efficiency.
Number of references: 8
Main heading: Machine design
Controlled terms: Computer software - Mathematical models - Three dimensional - Vegetables
Uncontrolled terms: 3D models - Automatically generated - Design cycle - Design efficiency - Digital designs - Menu items - Secondary development - Variant design - Virtual assembly
Classification code: 601 Mechanical Design - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 821.4 Agricultural Products - 902.1 Engineering Graphics - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.06.012
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
27. Accession number: 20102713063444
Title: Design and implementation of terminal for agricultural data real-time acquisition based on ARM and DSP
Authors: Shen, Mingxia1 ; Cong, Jinghua2 ; Zhang, Xiangfu1 ; Sun, Yuwen1 ; Xiong, Yingjun1 ; Zhou, Liang1
Author affiliation: 1 Engineering College, Nanjing Agricultural University, Nanjing 210031, China
2 Nanjing Forest Police College, Nanjing 210046, China
Corresponding author: Shen, M. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 147-152
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 ARM and DSP, an real-time agricultural information sampling terminal was designed. S3C2440 and TMS320C6713 was used as the main processor and the assistant processor, repectively. The principle of HPI interface was expounded. The HPI device driver and the collection of electric circuits for the farmland information were designed. By using Multisim, the emulation verification which could be amplified were made to the electric circuits. The collected latitude and the longitude of the farmland, image information, soil temperature, moisture, strength of illumination and other information were encoded. The experiment on the farm showed that various sensor information could be collected and uploaded reliably by this system. The time-lapse experiment showed that images were usually demonstrated incompletely when GPRS net delayed too much.
Number of references: 11
Main heading: Data handling
Controlled terms: Design - Digital signal processors - Electric lines - Electric network analysis - Farms - Nanotechnology
Uncontrolled terms: Data delays - Device Driver - Electric circuit - HPI interface - Image information - Multisim - Real time acquisition - Sensor informations - Soil temperature
Classification code: 933.1 Crystalline Solids - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 761 Nanotechnology - 723.2 Data Processing and Image Processing - 722.4 Digital Computers and Systems - 716.1 Information Theory and Signal Processing - 714.2 Semiconductor Devices and Integrated Circuits - 706.2 Electric Power Lines and Equipment - 703.1.1 Electric Network Analysis - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.029
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
28. Accession number: 20102713063453
Title: Coupling analysis of elastoplastic-diffusion and hydrogen transport near blunt crack tip
Authors: Wu, Xiaojin1 ; Wang, Jiaxu1 ; Hiroshi, Kanayama2 ; Xiao, Ke1
Author affiliation: 1 The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China
2 Faculty of Engineering, Kyushu University and AIST, Fukuoka 8190395, Japan
Corresponding author: Wu, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 193-198 221
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 mathematical model which described the hydrogen diffusivity near blunt crack tip was proposed. Coupled calculation model for structure and hydrogen diffusion analysis were put forward. Using finite element, the relations between hydrostatic pressure, plastic deformation and hydrogen diffusion were revealed. The synergy influence rules of plastic deformation and hydrogen near the crack tip were analyzed. Finite element method was used to evaluate the large deformation elasto-plastic behavior of the material with the hydrogen diffusion analysis results. Finite element analysis was employed to solve the coupled boundary-value problem of large strain elasto-plasticity and equilibrium hydrogen distributions near blunt crack tip by taking into consideration the effect of hydrogen on local flow stress.
Number of references: 16
Main heading: Hydrogen embrittlement
Controlled terms: Coupled circuits - Crack tips - Diffusion - Elastoplasticity - Finite element method - Hydrogen - Hydrostatic pressure - Mathematical models - Plastic deformation - Plastics - Stress intensity factors
Uncontrolled terms: Blunt crack - Coupled analysis - Coupled calculation - Coupling analysis - Effect of hydrogen - Elasto-plastic - Elastoplastic behavior - Finite Element - Finite element analysis - Hydrogen diffusion - Hydrogen diffusivity - Hydrogen distribution - Hydrogen induced cracking - Hydrogen transport - Influence rule - Large deformations - Large strains - Local flows
Classification code: 921.6 Numerical Methods - 921 Mathematics - 817.1 Polymer Products - 804 Chemical Products Generally - 931.1 Mechanics - 713.5 Other Electronic Circuits - 531.1 Metallurgy - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 631.1.1 Liquid Dynamics
DOI: 10.3969/j.issn.1000-1298.2010.06.038
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
29. Accession number: 20102713063422
Title: Optimization matching for the dynamical characteristic and the fuel economic characteristic of the truck's engine
Authors: Zhang, Junhong1 ; Ma, Zhengying1 ; Zhang, Guichang1 ; He, Zhenpeng1 ; Ma, Liang1
Author affiliation: 1 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author: Zhang, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 37-42 24
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 the common design of diesel engine, it's necessary to optimize the engine in order to improve the dynamical characteristic and the fuel economic characteristic of the truck. The truck's power balance equation was confirmed and verified by experiment, the dynamical characteristic and the fuel economic characteristic were analyzed based on the power balance equation and universal characteristic of engine. The results showed that the power utilization and the fuel economic characteristic were poor in the common cases. The optimized turbocharger and fuel injection pump for the diesel engine showed that the fuel consumption of 100 km was reduced at the speed of 40-70 km/h, and accelerating ability was improved.
Number of references: 8
Main heading: Trucks
Controlled terms: Diesel engines - Electric power utilization - Engines - Fuels - Optimization
Uncontrolled terms: Dynamical characteristics - Economic characteristics - Engine fuels - Fuel injection pumps - Optimization matching - Power balance equations
Classification code: 706.1 Electric Power Systems - 663.1 Heavy Duty Motor Vehicles - 654.2 Rocket Engines - 617.3 Steam Engines - 921.5 Optimization Techniques - 612.2 Diesel Engines - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 612 Engines
DOI: 10.3969/j.issn.1000-1298.2010.06.007
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
30. Accession number: 20102713063426
Title: Design and experiment of the vegetable seed metering device in pneumatic plate-type
Authors: Xia, Hongmei1 ; Li, Zhiwei1 ; Zhen, Wenbin1
Author affiliation: 1 College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Xia, H. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 56-60
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Working principle of vegetable seed metering device in pneumatic plate-type was put forward. Correlative structure was designed. Qingjiang cabbage seeds were selected for sowing performance test. Single factor test results showed that with the increase of diameter of suction hole, single-seed rate began to increase and then decreased, multi-seed rate increased, empty-seed rate began to decrease and then increased. Influence of diameter of suction hole on single-seed rate, multi-seed rate and empty-seed rate was highly significant. With the increase of relative pressure, single-seed rate first increased and then decreased, multi-seed rate first increased, then decreased and last increased, empty-seed rate first decreased and then increased. Influence of relative pressure on single-seed rate and empty-seed rate was highly significant, while on multi-seed rate was not significant. With the increase of sowing efficiency, single-seed rate first increased and then decreased, multi-seed rate first decreased and then increased, empty-seed rate increased. Influence of sowing efficiency on single-seed rate and empty-seed rate was highly significant, while on multi-seed rate was not so significant.
Number of references: 11
Main heading: Seed
Controlled terms: Design - Experiments - Plates (structural components) - Pneumatics - Vegetables
Uncontrolled terms: Performance tests - Plate-Type - Seed metering devices - Seed rate - Test results - Vegetable - Working principles
Classification code: 408 Structural Design - 408.2 Structural Members and Shapes - 632.3 Pneumatics - 821.4 Agricultural Products - 901.3 Engineering Research - 902.1 Engineering Graphics
DOI: 10.3969/j.issn.1000-1298.2010.06.011
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
31. Accession number: 20102713063450
Title: Fast skeletonization algorithm of foreign fibers in lint cotton
Authors: Qu, Xin1 ; Ding, Tianhuai1
Author affiliation: 1 Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
Corresponding author: Ding, T. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 177-181
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 skeletonization algorithm of foreign fibers in lint cotton was proposed. Distance transformation was implemented to the original image and the distance map was obtained. The local maxima points of the distance map were treated as the seed points and the skeleton was extended forward in all directions along the ridge points. Then the local maxima points were connected through the ridge lines. The skeleton points set scan and skeleton thinning process were carried on to eliminate the duplicated points, which had no use to the skeleton connectivity. Then the pruning process was implemented to remove the pseudo-skeletons and the accurate skeletons were obtained. The proposed algorithm guaranteed the connectivity of the skeleton and single-pixel in width. Furthermore, it could extract accurate skeletons of foreign fibers with slender shape and discontinuous parts. Test showed that the proposed algorithm had low computing complexity and could achieve the fast extraction of foreign fiber skeletons.
Number of references: 13
Main heading: Feature extraction
Controlled terms: Algorithms - Array processing - Computation theory - Cotton - Fibers
Uncontrolled terms: Computing complexity - Distance map - Distance transformation - Fast extraction - Foreign fiber - Local maximum - Original images - Ridge lines - Seed point - Skeletonization algorithm - Thinning process
Classification code: 921 Mathematics - 821.4 Agricultural Products - 819.4 Fiber Products - 819.1 Natural Fibers - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 751.1 Acoustic Waves - 741.1 Light/Optics - 732 Control Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 716 Telecommunication; Radar, Radio and Television
DOI: 10.3969/j.issn.1000-1298.2010.06.035
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
32. Accession number: 20102713063439
Title: Effect of 60Co γ-irradiation pre-treatment on drying characters of carrot
Authors: Liao, Wenyan1 ; Wang, Jun1 ; Yu, Yong1 ; Fu, Junjie2
Author affiliation: 1 College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2 College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Corresponding author: Wang, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 123-127 171
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 influence of different dosages of irradiation, temperatures of hot air, thicknesses of the slice carrot on the characters of dehydration and surface temperature for the irradiated carrot were studied. The results showed that three factors affected the characters of dehydration: irradiation dosage, temperature of hot air, and thickness of the slice carrot. With the increase of the dosage, both the rate of dehydration and the surface temperature for carrot increased. Then, the microstructure and water activity were also studied. The results showed that the membrane of the cell wall and vacuole of the irradiated samples were broken. The great dosage brought on the high water activity. These changes were the main cause for the characters of dehydration and surface temperature irradiated carrot.
Number of references: 17
Main heading: Irradiation
Controlled terms: Atmospheric temperature - Dehydration - Dewatering - Low temperature drying - Surface properties
Uncontrolled terms: Cell walls - High water - Hot air - Irradiated samples - Pre-Treatment - Surface temperatures - Water activity
Classification code: 951 Materials Science - 932.1 High Energy Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 802.3 Chemical Operations - 802.2 Chemical Reactions - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 622.2 Radiation Effects - 443.1 Atmospheric Properties
DOI: 10.3969/j.issn.1000-1298.2010.06.024
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
33. Accession number: 20102713063456
Title: Elastic-dynamics of planar flexile parallel mechanism
Authors: Lu, Kaijiang1, 2 ; Shi, Junping1 ; Gao, Xiulan2 ; Dan, Bochou2
Author affiliation: 1 School of Mechanical and Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, China
2 Mechanical and Electrical Engineering Department, Baoji University of Arts and Sciences, Baoji 721007, China
Corresponding author: Lu, K. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 208-215
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 design the high-speed planar 3-DOF parallel mechanism, the direct kinematics was studied comprehensively. Velocity and acceleration characteristics of mechanism were gained. With the driving parts' movement, all the forward position configurations were obtained. According to the continuity conditions of movement, the optimal trajectory of moving platform was planned. The velocity and acceleration characteristics of mechanism were implied. The mechanism was divided into stroke unit and plane triangle unit. The finite element model of the mechanism was established. By combining kinematics, the moving platform was moving along the planning track, the modal frequency and main vibration mode of the mechanism with the change of mechanism' position and posture were analyzed. Variation law of elastic displacement error and the dynamic stress of mechanism was obtained by researching the dynamic response of mechanism in drive force and inertial force excitation. Therefore, the kinematics and the dynamic performance of mechanism were assessed comprehensively.
Number of references: 13
Main heading: Dynamics
Controlled terms: Dynamic response - Finite element method - Kinematics - Machine design - Mechanisms - Vibration analysis
Uncontrolled terms: Continuity conditions - Direct kinematics - Drive force - Driving part - Dynamic performance - Dynamic stress - Elastic displacements - Finite element models - High-speed - Inertial forces - Modal frequency - Moving platform - Optimal trajectories - Parallel mechanisms - Vibration modes
Classification code: 943.2 Mechanical Variables Measurements - 931.1 Mechanics - 921.6 Numerical Methods - 751.2 Acoustic Properties of Materials - 601.3 Mechanisms - 601 Mechanical Design - 408.1 Structural Design, General
DOI: 10.3969/j.issn.1000-1298.2010.06.041
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
34. Accession number: 20102713063445
Title: Call center system for agricultural knowledge based on remote diagnosis of pests and diseases
Authors: Li, Xinxing1 ; Fu, Zetian1 ; Zhang, Lingxian2
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Zhang, L. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 153-157
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 help the farmers to obtain the agricultural knowledge to prevent and control the pests and diseases as well as to carry on the remote diagnosis by telephone, a call center system was presented for agricultural knowledge based on the remote diagnosis of pests and diseases. Based on the union of the call center technology and the traditional expert system, this system adopted the implementation plan of call center IVR flow transferring the expert system knowledge base automatically, and coordinated the call center CTI server the traditional database server and Web server to provide the function of carried on the remote diagnosis of agricultural pests and diseases with the aid of the telephone network; the system also provided the functions of knowledge browsing, case gaining and expert consultation, and could satisfy the farmers' needs to gain the agricultural knowledge as well as to carry on the remote diagnosis.
Number of references: 10
Main heading: Diagnosis
Controlled terms: Agriculture - Expert systems - Telephone - Telephone circuits - Telephone sets - Telephone systems
Uncontrolled terms: Agricultural pests - Call center - Call centers - Data-base servers - Expert consultation - Expert system knowledge - Farmers' needs - Remote diagnosis - Telephone networks - Web servers
Classification code: 461.6 Medicine and Pharmacology - 718.1 Telephone Systems and Equipment - 723.4.1 Expert Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI: 10.3969/j.issn.1000-1298.2010.06.030
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
35. Accession number: 20102713063455
Title: Dynamic characteristics of flexible pneumatic torsion joint
Authors: Bao, Guanjun1 ; Wang, Zhiheng1 ; Yang, Qinghua1 ; Shao, Tiefeng2 ; Gao, Feng1 ; Zhang, Libin1
Author affiliation: 1 Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou 310032, China
2 Engineering Training Center, China Jiliang University, Hangzhou 310018, China
Corresponding author: Zhang, L. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 204-207 226
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 kinetic model of flexible pneumatic torsion (FPA) joint was established based on equilibrium of moments, and the dynamic models for inflating and deflating process were built based on adiabatic gas conservation of energy. The influences of FPA initial shell-thickness, average radius, initial angle, and connector outlet area on the dynamic characteristics of torsion joint were analyzed. Simulation results showed that the initial shell-thickness, average radius and initial angle of FPA influenced both the turning-angle and dynamic process of torsion joint, while the connector outlet area had no effect on the turning-angle and dynamic process. Experimental results were close to that of simulation, which implied that the established model of flexible pneumatic torsion joint could fairly describe its dynamic process and characteristics.
Number of references: 3
Main heading: Torsional stress
Controlled terms: Actuators - Computer simulation - Pneumatic equipment - Pneumatics - Turning
Uncontrolled terms: Conservation of energy - Dynamic characteristics - Dynamic process - Flexible pneumatic actuator - Flexible pneumatic torsion joints - Initial angle - Kinetic models - Simulation result
Classification code: 732.1 Control Equipment - 731.2 Control System Applications - 723.5 Computer Applications - 632.4 Pneumatic Equipment and Machinery - 632.3 Pneumatics - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics - 604.2 Machining Operations - 602.1 Mechanical Drives - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.06.040
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
36. Accession number: 20102713063434
Title: Rational application rate of sewage sludge compost
Authors: Kang, Jun1 ; Zhang, Zengqiang2 ; Sun, Xining1 ; Meng, Zhaofu2
Author affiliation: 1 College of Resources and Environment, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Sciences, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Zhang, Z. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 98-102
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 toxic response factor of different forms of heavy metals, rational application rate of sewage sludge compost was determined. Pollution index and geoaccumulation index were used to evaluate contamination degree of sewage sludge compost. Rational application rate of sewage sludge compost in Yangling was 3.69t/(hm2 · a). This method stressed the importance of the forms of heavy metals and made up for the shortage of only controlling the total amount of heavy metals in the past. Results showed Cd was the most important element to restrict application of sewage sludge compost in this area.
Number of references: 21
Main heading: Composting
Controlled terms: Heavy metals - Metals - Sewage sludge - Toxic materials
Uncontrolled terms: Application rate - Application rates - Compost - Contamination degree - Geo-accumulation index - Pollution index - Sewage sludge compost - Toxic response
Classification code: 914.1 Accidents and Accident Prevention - 821.5 Agricultural Wastes - 804 Chemical Products Generally - 914.3 Industrial Hygiene - 531 Metallurgy and Metallography - 452.2 Sewage Treatment - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 453.1 Water Pollution Sources
DOI: 10.3969/j.issn.1000-1298.2010.06.019
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
37. Accession number: 20102713063447
Title: Positioning technology of field weed based on machine vision
Authors: Yin, Jianjun1 ; Shen, Baoguo1, 2 ; Chen, Shuren1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
2 Zhenjiang Technical Vocational College, Zhenjiang 212003, China
Corresponding author: Chen, S. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 163-166 192
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: Weak perspective model of camera was adopted. First of all, image of calibration target was captured to obtain pixel coordinates of 48 target centroids. Then hidden parameters matrix of camera was calculated by using least square based on DLT. Location tests of ordered and disordered weeds in indoor soil trough showed that positioning errors of ordered and disordered weeds were 19.2 mm and 22.8 mm respectively by using established hidden parameters matrix of camera. The positioning accuracy could meet the requirement of precise spraying of herbicide.
Number of references: 11
Main heading: Cameras
Controlled terms: Calibration - Computer vision - Herbicides
Uncontrolled terms: Calibration targets - Camera calibration - Least Square - Machine vision - matrix - On-machines - Positioning accuracy - Positioning error - Positioning technologies - Weak perspective
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 902.2 Codes and Standards - 821.2 Agricultural Chemicals - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 742.2 Photographic Equipment - 741.2 Vision - 731.6 Robot Applications - 723.5 Computer Applications
DOI: 10.3969/j.issn.1000-1298.2010.06.032
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
38. Accession number: 20102713063431
Title: Design and experiment of key components of trash cultivator's working in paddy rice seeding lines
Authors: Chen, Zhenxin1 ; Wang, Jinwu1 ; Niu, Chunliang1 ; Ge, Yiyuan1 ; Wang, Jinfeng1
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 81-86
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 spring-tooth weeding working in paddy field was designed. Weed cutter with arc-shaped bend could reduce the injury rate of seedlings in some extent. The steel soft shaft was selected as transmission parts of the device. The quadratic rotation-orthogonal test was applied in 7 and 14 days respectively. The effects of interaction of cutter rotation speed, forward velocity of machine, buried depth on weeding ratio and seeding injury ratio were attained. The optimal combination in 7 days' test was: the cutter rotation speed was 230r/min, the forward velocity was 1.02 m/s, the buried depth was 18 mm, weeding rate was 73%, and miller injury rate was 0.13%. The optimal combination in 14 days' test was: the cutter rotation speed was 230 r/min, the forward velocity was 0.48 m/s, the buried depth was 27 mm. The verification test was carried on according to the optimal operational parameters combination. The results showed that this operational parameter combination could fulfils the request of weeding ratio; meanwhile, the seeding injury ratio was the lowest.
Number of references: 8
Main heading: Springs (components)
Controlled terms: Dentistry - Design - Experiments - Optimization - Rotation - Seed - Speed
Uncontrolled terms: Buried depth - Forward velocity - Injury rate - Key component - Operational parameters - Optimal combination - Orthogonal test - Paddy fields - Paddy rice - Rotation speed - Transmission parts - Verification tests
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 902.1 Engineering Graphics - 901.3 Engineering Research - 821.4 Agricultural Products - 601.2 Machine Components - 601.1 Mechanical Devices - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.016
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
39. Accession number: 20102713063421
Title: Design method of variable speed hydrodynamic coupling based on CFD
Authors: He, Yandong1 ; Ma, Wenxing2 ; Deng, Hongchao2 ; Liu, Gang3
Author affiliation: 1 School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
3 Liaoning Provincial Institute of Agricultural Mechanization, Shenyang 110161, China
Corresponding author: He, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 31-36
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 parametric design and optimum design method of variable speed hydrodynamic coupling based on UG and CFD was proposed. The parametric model and optimum design flow of variable speed hydrodynamic coupling were established. The original characteristic curve based on flow-field numerical solution matched with the experiment result well, so CFD could be used for the complex gas-liquid two-phase flow of hydrodynamic coupling. Numerical simulation and performance prediction were conducted respectively to three different parametric schemes under brake condition, traction condition and rated condition, and compared with the base-type coupling. The second scheme had a more reasonable flow distribution, its pressure and velocity difference was smaller, pump torque coefficient was larger, and was the reasonable optimization scheme of base-type coupling.
Number of references: 8
Main heading: Computational fluid dynamics
Controlled terms: Computer simulation - Design - Fluid dynamics - Hydrodynamics - Multiphase flow - Numerical analysis - Speed
Uncontrolled terms: Characteristic curve - Design method - Flow distribution - Gas-liquid two-phase flow - Hydrodynamic coupling - Numerical simulation - Numerical solution - On flow - Optimization scheme - Optimum designs - Parametric design - Parametric models - Performance prediction - Rated condition - Torque coefficient - Variable speed - Velocity difference
Classification code: 931.1 Mechanics - 921.6 Numerical Methods - 902.1 Engineering Graphics - 723.5 Computer Applications - 631.2 Hydrodynamics - 631.1.2 Gas Dynamics - 631.1.1 Liquid Dynamics - 631.1 Fluid Flow, General - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.006
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
40. Accession number: 20102713063417
Title: Co-simulation and test of differential drive assist steering control system for four-wheel electric vehicle
Authors: Wang, Junnian1 ; Wang, Qingnian1 ; Song, Chuanxue1 ; Jin, Liqiang1 ; Hu, Changjian1
Author affiliation: 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China
Corresponding author: Wang, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 7-13 30
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 model of electric vehicle with motorized-wheel-drive based on AMESim was built, and the differential drive assist steering (DDAS) control system model was built using Matlab/Simulink. On this basis, the control strategy of torque distribution between right and left front steerable wheels was presented, aiming for the reduction of the steering efforts and assisting the steering wheel return to center, as well as the yaw compensation produced by differential drive of the rear two wheels. The co-simulation results validated that the proposed DDAS control system could improve steering handiness, steering feel and returnability of the steering wheel, including stability compensation and practicability enhancement for DDAS system. Furthermore, the double-lane change road experiments for rapid control prototyping of DDAS control strategy were conducted. Experimental results verified the feasibility of providing steering assistance and the ability to keep road feeling of DDAS system.
Number of references: 17
Main heading: Automobile parts and equipment
Controlled terms: Automobile steering equipment - Control system stability - Control systems - Electric vehicles - Experiments - Fuzzy control - Model structures - Pneumatic control equipment - Roads and streets - Steering - Wheels
Uncontrolled terms: Control strategies - Control system models - Cosimulation - Differential drive - Dynamics models - Lane change - MATLAB /simulink - Rapid control prototyping - Right and left - Steerable wheels - Steering control system - Steering wheel - Torque distribution
Classification code: 682.1.2 Locomotives - 702.1.2 Secondary Batteries - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.4 System Stability - 732.1 Control Equipment - 901.3 Engineering Research - 921 Mathematics - 671.2 Ship Equipment - 406.2 Roads and Streets - 408 Structural Design - 432 Highway Transportation - 601.2 Machine Components - 632.4 Pneumatic Equipment and Machinery - 662.1 Automobiles - 662.2 Smaller Vehicles - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components
DOI: 10.3969/j.issn.1000-1298.2010.06.002
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
41. Accession number: 20102713063428
Title: Stems biomechanical properties experiment of creeping tangled forage in harvesting period
Authors: Zhao, Chunhua1, 2 ; Zhang, Fengwei2 ; Han, Zhengsheng2 ; Cao, Zhizhong1 ; Shi, Shangli1
Author affiliation: 1 Pratacultural College, Gansu Agricultural University, Lanzhou 730070, China
2 Engineering College, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author: Cao, Z. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 65-69 92
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: Three kinds of stems in harvesting period, creeping type, erect crownvetch strain and half crawl type(Coronilla varial.) were chosen to perform the biomechanical nature of forage stems by the electronic testing machine CMT2502 and Kh. N. PoChinok method. Results showed that the tensile strength of erect crownvetch strain stems were maximum (14.88-26.80MPa). The average largest load of creeping type, half crawl type and erect crownvetch strain were 88.88N, 152.70 N and 187.10 N, respectively; the cellulose contents of above stems were 13.59%, 13.87% and 15.52%, respectively; the lignin contents of above stems were 4.47%, 4.18% and 3.95%, respectively; the protein contents of above stems were 3.83%, 4.55% and 2.74%, respectively. The cellulose contents, lignin contents and protein contents increased with the reduction of moisture content. The strength and stiffness of creeping tangled forage stems mainly depended on the content, connection mode and alignment of cellulose and lignin. Erect crownvetch strain were easier to mechanized harvest than others because of its low ratio of lignin to cellulose.
Number of references: 14
Main heading: Mechanical properties
Controlled terms: Biomechanics - Cellulose - Experiments - Harvesting - Lignin - Plants (botany) - Proteins - Tensile strength
Uncontrolled terms: Biomechanical properties - Cellulose content - Chemical compositions - Connection mode - Creeping tangled forage - Electronic testing - Harvesting periods - Lignin contents - Moisture contents - Protein contents
Classification code: 951 Materials Science - 931.1 Mechanics - 901.3 Engineering Research - 821.3 Agricultural Methods - 815.1.1 Organic Polymers - 811.3 Cellulose, Lignin and Derivatives - 804.1 Organic Compounds - 461.9 Biology - 461.3 Biomechanics, Bionics and Biomimetics - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.06.013
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
42. Accession number: 20102713063420
Title: Structure analysis of composition of frictional brake and contactless wheel retarder system
Authors: Liu, Cunxiang1, 2 ; He, Ren1
Author affiliation: 1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2 Department of Automobile Engineering, Guangxi Communication Vocational and Technical Institute, Nanning 530023, China
Corresponding author: He, R. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 25-30
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 obtain optimum structure parameters of frictional brake and contactless wheel retarder integrated system, the optimization design was used. The influence law between the main structure parameters of the integrated system and brake torque was analyzed in order to improve brake torque. Meanwhile, with the proposed method, different structure parameters was compared, simulation analysis on the automobile equipped with the integrated system and the automobile equipped with the frictional brake was performed. The results showed that the proposed optimization design could reduce automobile braking time and distance by 5.9 s and 92.1 m, respectively.
Number of references: 9
Main heading: Structural optimization
Controlled terms: Automobiles - Brakes - Design - Friction - Integrated control - Integrated optics - Wheels
Uncontrolled terms: Automobile braking - Brake torque - Contact less - Different structure - Integrated systems - Main structure - Optimization design - Optimized design - Optimized designs - Simulation analysis - Structure analysis - Structure parameter
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 902.1 Engineering Graphics - 741.3 Optical Devices and Systems - 731.1 Control Systems - 662.1 Automobiles - 602 Mechanical Drives and Transmissions - 601.2 Machine Components - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.06.005
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
43. Accession number: 20102713063432
Title: Combined prediction method of total power of agricultural machinery based on BP neural network
Authors: Ju, Jinyan1 ; Wang, Jinwu1 ; Wang, Jinfeng1
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 6
Issue date: June 2010
Publication year: 2010
Pages: 87-92
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 view of the limitations in single prediction models and linear combined prediction model, nonlinear combined prediction model for total power of agricultural machinery was put forward on the basis of establishing single prediction models for total power of agricultural machinery in Heilongjiang province. The results of error analysis showed that mean absolute percent error of proposed nonlinear combined prediction model was 3.03%, which was lower than 6.26%, 4.65%, 4.88% and 3.72% of one-variable liner regression model, exponential model, GM(1, 1) model and cubic exponent smooth model, and a little higher than 2.86% of the linear combined prediction model based on the minimum sum of error square. Predicting total power of agricultural machinery from 2006 to 2008 proved that this prediction model could efficiently improve prediction accuracy for total power of agricultural machinery. The total powers of agricultural machinery were predicted from 2009 to 2015 in Heilongjiang province. The prediction results showed that total power of agricultural machinery would maintain swift growth tendency in the future several years, it would be 40537MW in 2015.
Number of references: 18
Main heading: Forecasting
Controlled terms: Agricultural machinery - Error analysis - Mathematical models - Neural networks - Regression analysis - System theory
Uncontrolled terms: BP neural networks - Exponential models - GM (1 , 1) model - Nonlinear combined prediction - Prediction accuracy - Prediction methods - Prediction model - Regression model - Smooth models - Total power
Classification code: 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921 Mathematics - 912.3 Operations Research - 961 Systems Science - 912.2 Management - 731.4 System Stability - 723.4 Artificial Intelligence - 461.1 Biomedical Engineering - 821.1 Agricultural Machinery and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.06.017
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
? 2009 Elsevier Inc. All rights reserved.
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