2010年第41卷第1期共收錄42篇
1. Accession number: 20101012752827
Title: Numerical simulation of swing arm impact process to the PY140 impact sprinkler
Authors: Wang, Qiming1 ; Yan, Haijun1 ; Ju, Jinsan1 ; Liu, Changyun1
Author affiliation: 1 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Yan, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 86-91
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: As one of the key parts of the impact sprinkler, the swing arm is exerted by complex dynamic stress in the impact process. Based on the dynamic explicit software ANSYS/LS-DYNA, a finite-element model for simulating the rotation of swing arm around the axis and the impact between the swing arm and the sprinkler body was established. Several cases under three rotational angular velocities and with or without the rubber pad fixed on the sprinkler body's contact stop were investigated. The results indicate that under the angular velocity of 400(°)/s, the simulated peak dynamic stress of PY140 impact sprinkler was 42.3 MPa, with an error less than 0.5% compared with the measured result. The predicted peak dynamic stress was located offset 15cm from the centerline of the swing arm's rotation axis, which was the same as the measured data. The extreme dynamic stresses of different cross sections and contact stresses increased with the increase of the rotational angular velocity. After fixing the rubber pad, the peak dynamic stress had an average decrease of 10.4% under three angular velocities, while the contact time had an average increase of 76.6%.
Number of references: 14
Main heading: Rotation
Controlled terms: Angular velocity - Computer simulation - Rubber
Uncontrolled terms: Centerlines - Complex dynamics - Contact Stress - Contact time - Cross section - Dynamic explicit - Dynamic stress - Finite element simulations - Finite-element models - Impact process - Key parts - Measured data - Measured results - Numerical simulation - Peak dynamic stress - Rotation axis - Software ANSYS/LS-DYNA
Classification code: 601.1 Mechanical Devices - 723.5 Computer Applications - 818.1 Natural Rubber - 931.1 Mechanics - 931.3 Atomic and Molecular Physics
DOI: 10.3969/j.issn.1000-1298.2010.01.017
Database: Compendex
2. Accession number: 20101012752848
Title: Transiting and acceleration/deceleration methods for feed-speed of machined path segments
Authors: Chen, Liangji1 ; Feng, Xianzhang1
Author affiliation: 1 School of Mechatronics Engineering, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450015, China
Corresponding author: Chen, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 200-204
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 meet the requirements of numerical control system to control feed-speed in high-speed and high-accuracy machining, the conditions of direct transiting under the adjacent path segments are determined, and the correcting problem of turning speed is researched according to the transiting angle when the conditions are not feasible. The dealing principle of acceleration/deceleration in one segment is presented and the feed-speed is re-planed under the basis of invariableness length. The trouble of forecasting deceleration point and end point using the past methods is avoided. The result of practical computation indicates that the proposed method, relative to the method of turning speed '0', enhances the machining efficiency (about 2% per segment) based on assuring accuracy and could be well applied to high-speed machining system.
Number of references: 7
Main heading: Speed
Controlled terms: Acceleration control - Computational efficiency - Numerical control systems - Turning
Uncontrolled terms: Acceleration/deceleration - End points - High speed machining - High-accuracy - High-speed - Machining efficiency - Path segments
Classification code: 604.2 Machining Operations - 723.1 Computer Programming - 731.1 Control Systems - 731.3 Specific Variables Control - 921 Mathematics - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.01.038
Database: Compendex
3. Accession number: 20101012752834
Title: Model of vacuum infrared radiation drying on Rehmanniae
Authors: Liu, Yunhong1, 2 ; Zhu, Wenxue2 ; Ma, Haile1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 College of Food and Bioengineering, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 122-126
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: Research on vacuum infrared radiation drying of Rehmanniae was carried out using an improved vacuum infrared radiation dryer. By means of logarithm of experimental data and linear regression, the pattern of thin-layer vacuum infrared drying model of Rehmanniae, which was related to the temperature of radiation board and pressure in the chamber, was set as Modified Page equation, and the expression and values of model parameters were also obtained subsequently. The model could describe and predict change regulation of moisture ratio very well according to the comparison of experimental values and calculated values.
Number of references: 17
Main heading: Infrared drying
Controlled terms: Agricultural products - Algebra - Computer simulation - Curing - Dewatering - Gene expression - Infrared radiation - Mathematical models - Radiation - Radiometers - Vacuum - Vacuum technology
Uncontrolled terms: Calculated values - Experimental data - Experimental values - Model parameters - Moisture ratios - Rehmanniae - Thin layer drying - Thin layers
Classification code: 802.2 Chemical Reactions - 802.3 Chemical Operations - 815.1 Polymeric Materials - 944.7 Radiation Measuring Instruments - 818.3 Rubber and Elastomer Processing - 921 Mathematics - 921.1 Algebra - 821.4 Agricultural Products - 741.1 Light/Optics - 723.5 Computer Applications - 461.8.1 Genetic Engineering - 461.9 Biology - 633 Vacuum Technology - 642.1 Process Heating - 657.1 Solar Energy and Phenomena - 711 Electromagnetic Waves
DOI: 10.3969/j.issn.1000-1298.2010.01.024
Database: Compendex
4. Accession number: 20101012752812
Title: System modeling and interaction analysis of vehicle suspension, steering and braking systems
Authors: Zhu, Hui1 ; Chen, Wuwei1
Author affiliation: 1 School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Chen, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 7-13
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: Considering vehicles running in many different work conditions, the mathematical models of suspension, steering and braking system are established. The interconnections and confinements among the three systems are analyzed. Based on the analysis of interrelationships among the systems operated under different work conditions, the problems needed to be paid attention to and the measures needed to be taken in the system designs are presented. The results of simulation and testing show the close connection and interaction among the three systems, and the correctness of the established models.
Number of references: 11
Main heading: Automobile parts and equipment
Controlled terms: Automobile steering equipment - Automobile suspensions - Biological radiation effects - Brakes - Braking - Integrated control - Mathematical models - Steering - Vehicle suspensions
Uncontrolled terms: Braking system - Influencing factor - Interaction analysis - Running-in - Simulation and testing - Suspension - System design - System modeling - Three systems - Work condition
Classification code: 744 Lasers - 731.1 Control Systems - 711 Electromagnetic Waves - 671.2 Ship Equipment - 663.2 Heavy Duty Motor Vehicle Components - 921 Mathematics - 662.4 Automobile and Smaller Vehicle Components - 622.2 Radiation Effects - 602 Mechanical Drives and Transmissions - 601.2 Machine Components - 461.2 Biological Materials and Tissue Engineering - 632.1 Hydraulics
DOI: 10.3969/j.issn.1000-1298.2010.01.002
Database: Compendex
5. Accession number: 20101012752821
Title: Comprehensive evaluation on compensatory effects of water recovery after drought based on projection pursuit classification model
Authors: Hao, Shurong1 ; Guo, Xiangping1 ; Zhang, Zhanyu1
Author affiliation: 1 College of Agricultural Engineering, Hohai University, Nanjing 210098, China
Corresponding author: Hao, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 59-62 33
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An effective projection pursuit classification model is suggested to evaluate compensatory effects of water recovery after drought in order to avoid the uncertainty of the evaluation and the optimization, and to improve the accuracy of the evaluating model. It adopts an ant colony algorithm based on mutation and dynamic pheromone updating to find the best projective direction, and then uses the best projective direction to calculate the contribution of each evaluation index to the compensatory effects. The test results showed that photosynthetic rate directly reflected the capacity of compensatory growth. Thus it is a critical factor for compensatory effects, which conformed to the previous studies. The optimal compensatory effects appeared in the fifth day after appropriate rewatering.
Number of references: 13
Main heading: Plants (botany)
Controlled terms: Algorithms - Drought - Optimization
Uncontrolled terms: Ant colony algorithms - Classification models - Compensatory growth - Comprehensive evaluation - Critical factors - Evaluating models - Evaluation index - Photosynthetic rate - Projection pursuits - Rewatering - Test results - Water recovery - Water stress
Classification code: 443.3 Precipitation - 444 Water Resources - 461.9 Biology - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.5 Optimization Techniques
DOI: 10.3969/j.issn.1000-1298.2010.01.011
Database: Compendex
6. Accession number: 20101012752842
Title: Scheme and algorithm of cottonseed selection based on image processing
Authors: Chen, Bingqi1 ; Gao, Zhenjiang1 ; Song, Tongzhen1 ; Wang, Jiliang2 ; Yan, Hongshan2 ; Xue, Li2
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, China
Corresponding author: Chen, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 167-171 187
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An algorithm based on image processing to select cottonseeds was proposed. Firstly, each position of cottonseed channels in the image was located before selecting operation. And then, these cottonseeds were separated from the backgrounds by the difference between current image and first image, and the binary images of cottonseeds were obtained. The number of red pixels of cottonseed regions in the color image was calculating, and the red cottonseeds were determined. The broken seeds were judged by analyzing the binary image. Finally, the edge of cottonseed was extracted by differential calculus, and the exterior pixels were removed to determine the crack seed. Experimental results indicated that the algorithm could judge the cottonseeds fast and accurately.
Number of references: 9
Main heading: Edge detection
Controlled terms: Binary images - Differentiation (calculus) - Imaging systems - Pixels - Seed
Uncontrolled terms: Color images - Cottonseed - Current image - Seed selection - Selection based
Classification code: 921.2 Calculus - 821.4 Agricultural Products - 751.1 Acoustic Waves - 746 Imaging Techniques - 742.2 Photographic Equipment - 741.1 Light/Optics - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 722.2 Computer Peripheral Equipment - 716 Telecommunication; Radar, Radio and Television
DOI: 10.3969/j.issn.1000-1298.2010.01.032
Database: Compendex
7. Accession number: 20101012752844
Title: Modal parameter identification of time varying vibration systems subjected to stick-slip friction
Authors: Liu, Lilan1 ; Liu, Hongzhao1 ; Yuan, Daning1 ; Wu, Ziying1
Author affiliation: 1 School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Liu, 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: 1
Issue date: January 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: Friction is introduced into the modal parameter identification of the time varying vibration systems. The modal characteristics of the vibration system are extracted by using the time varying multivariable Prony method. A time varying multivariable Prony model is established for the multi-output response signals of the vibration system and the parameters of the model are estimated by means of the recursive least square method. In the simulation, a signal with composite frequency is identified. The identified results meet the theoretical values well, which verifies the effectiveness of the presented method. In the example, the motion equation of the moving mass on the planar two-bar manipulator is established, in which the LuGre friction is considered. The natural frequency of the manipulator subjected to stick-slip friction is identified by using the time varying multivariable Prony method. The feasibility of the method is verified by the satisfying identification results.
Number of references: 8
Main heading: Identification (control systems)
Controlled terms: Composite beams and girders - Electric exciters - Equations of motion - Friction - Least squares approximations - Manipulators - Modal analysis - Slip forming - Time varying systems - Tribology
Uncontrolled terms: Modal parameters - Multi variables - Prony method - Stick-slip friction - Time varying
Classification code: 961 Systems Science - 921 Mathematics - 921.2 Calculus - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 731.5 Robotics - 705.1 Electric Machinery, General - 691.1 Materials Handling Equipment - 412 Concrete - 408.2 Structural Members and Shapes - 405.2 Construction Methods - 731.1 Control Systems
DOI: 10.3969/j.issn.1000-1298.2010.01.034
Database: Compendex
8. Accession number: 20101012752815
Title: Optimal design of pneumatic automatic transmission actuator
Authors: Wang, Yang1 ; Xi, Junqiang1 ; Zhao, Xijun1 ; Chen, Huiyan1
Author affiliation: 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Xi, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 23-28
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 pure AMT pneumatic automatic transmission actuator is designed, and the theoretical thermodynamic model of the shifting cylinder is set up by using the gas thermodynamics and kinetics. Based on changing characteristics of shift indicators in vehicle, the Simulink simulation is designed. Through testing different shift cylinder size impacting on the rate of change of chamber pressure and set up time of chamber pressure, clear shift cylinder optimization design objectives are established. Finally, through a balanced optimization of orthogonal test method, optimal design of AMT implementation pneumatic cylinder transmission system is achieved.
Number of references: 9
Main heading: Optimization
Controlled terms: Actuators - Aerodynamics - Blood vessel prostheses - Cylinders (shapes) - Design - Optimal systems - Pneumatics - Taxicabs - Temperature measurement - Thermodynamics - Transmissions - Trucks - Vehicles
Uncontrolled terms: Aerodynamic simulations - Automated mechanical transmissions - Automatic transmission - Chamber pressure - Commercial vehicles - In-vehicle - Optimal design - Optimization design - Orthogonal test method - Pneumatic Cylinders - Rate of change - Set-up time - Simulink simulations - Thermodynamic model - Thermodynamics and kinetics - Transmission systems
Classification code: 651.1 Aerodynamics, General - 662.1 Automobiles - 663.1 Heavy Duty Motor Vehicles - 731.1 Control Systems - 961 Systems Science - 731.2 Control System Applications - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 944.6 Temperature Measurements - 732.1 Control Equipment - 641.1 Thermodynamics - 632.3 Pneumatics - 408 Structural Design - 408.2 Structural Members and Shapes - 432 Highway Transportation - 432.2 Passenger Highway Transportation - 462.4 Prosthetics - 602.1 Mechanical Drives - 602.2 Mechanical Transmissions - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics
DOI: 10.3969/j.issn.1000-1298.2010.01.005
Database: Compendex
9. Accession number: 20101012752830
Title: Prediction model for organic matter content in chicken manure during plant-field composting
Authors: Wang, Xiaoyan1 ; Huang, Guangqun1 ; Han, Lujia1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Han, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 101-105
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 objective of this study was to explore the feasibility to estimate organic matter (OM) content in chicken manure during aerobic composting. Two types of regression methods were used with physicochemical properties and near-infrared spectroscopy (NIRS). Single and two variable linear regressions between the values of dry matter (DM), pH value, electrical conductivity (EC) and OM content were developed. Results showed that it was significant in practice to estimate the OM content using DM value with a higher coefficient of determination (R2=0.81, P<0.001). In addition, multiple linear regression (MLR), principle component regression (PCR) and partial least square regression (PLS) were used to develop NIRS models for OM. It was observed that the both models of PCR and PLS were robust with the coefficient of determination in validation set r2=0.95, respectively. And both the ratios of standard deviation of validation set to root mean square error of prediction (RPD) are greater than 4.0.
Number of references: 22
Main heading: Infrared spectroscopy
Controlled terms: Biogeochemistry - Biological materials - Electric conductivity - Infrared devices - Infrared transmission - Linear regression - Manures - Mathematical models - Meats - Organic compounds - Textiles
Uncontrolled terms: Aerobic composting - Chicken manure - Coefficient of determination - Dry matters - Electrical conductivity - Multiple linear regressions - Organic matter - Organic matter content - Partial least square regression - pH value - Physicochemical properties - Physicochemical property - Prediction model - Principle component regression - Regression method - Root-mean-square error of predictions - Standard deviation
Classification code: 819 Synthetic and Natural Fibers; Textile Technology - 821.5 Agricultural Wastes - 822.3 Food Products - 921 Mathematics - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements - 804.1 Organic Compounds - 452.3 Industrial Wastes - 461.2 Biological Materials and Tissue Engineering - 481.2 Geochemistry - 701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801.2 Biochemistry
DOI: 10.3969/j.issn.1000-1298.2010.01.020
Database: Compendex
10. Accession number: 20101012752850
Title: Experiment and prediction model for surface roughness in micro-milling
Authors: Shi, Wentian1 ; Liu, Yude1 ; Wang, Xibin2 ; Jiang, Fang3
Author affiliation: 1 College of Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China
2 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
3 Mechanical Engineering Department, North China Institute of Aerospace Engineering, Langfang 065000, China
Corresponding author: Shi, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 211-215
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: An orthogonal experiment regression analysis and a response surface methodology are used to build the models to predict roughness of aluminum surface machined by a micro turn-milling NC machine. The influence of milling parameters used in the experiment is analyzed by the two means, orthogonal analysis and RSM. The milling parameters include cutting speed, feed per tooth, and cutting depth. In contrast with the orthogonal analysis, the RSM is an optimization prediction model and has the higher precision in micro-milling. The significance order of the parameters in the prediction model is determined based on the result of the experiment. The cutting speed has the most significant effect on surface roughness, and the second and the third significant parameters are feed per tooth and the cutting depth respectively by the rounded analysis in the current experimental condition. The RSM prediction model has higher fitting degree and practicability than the orthogonal analysis method. The milling parameters can be chosen to control and improve the quality of the surface roughness based on the prediction model of RSM.
Number of references: 13
Main heading: Quality control
Controlled terms: Dentistry - Experiments - Mathematical models - Metal analysis - Milling (machining) - Milling machines - Regression analysis - Statistics - Surface properties - Surface roughness
Uncontrolled terms: Aluminum surface - Cutting depth - Cutting speed - Experimental conditions - Fitting degree - Micro milling - Milling parameters - Orthogonal analysis - Orthogonal experiment - Orthogonal regression - Prediction model - Response Surface Methodology - Turn milling
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 921 Mathematics - 913.3 Quality Assurance and Control - 901.3 Engineering Research - 801 Chemistry - 604.2 Machining Operations - 603.1 Machine Tools, General - 531 Metallurgy and Metallography - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering
DOI: 10.3969/j.issn.1000-1298.2010.01.040
Database: Compendex
11. Accession number: 20101012752814
Title: Starting control based on wet dual clutch transmission
Authors: Cheng, Xiusheng1 ; Feng, Wei1 ; Lu, Zhonghua1 ; Wang, Yinshu1
Author affiliation: 1 College of Automotive Engineering, Jilin University, Changchun 130025, China
Corresponding author: Cheng, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 18-22 28
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: Aimed at the problem of starting control of dual clutch transmission equipped with wet clutch, the starting strategy was developed on the basis of clutch control evaluation and dynamics analysis about transmission. The clutch pressure control method was proposed based on fuzzy PID control, and the detailed fuzzy control process was developed. The control flow of DCT starting was determined so that the clutch actual pressure got better control. Starting experiments of three different throttle and continuous start-stop experiments in a short time were executed. The experimental results verified the rationality of the control strategies. It could meet the requirements of smooth and rapid vehicle starting, and establish the foundation for the further development of DCT.
Number of references: 6
Main heading: Clutches
Controlled terms: Cosine transforms - Discrete cosine transforms - Fuzzy control - Proportional control systems - Three term control systems - Two term control systems
Uncontrolled terms: Clutch control - Clutch pressure - Control flows - Control methods - Control strategies - Dual clutch transmission - Dynamics analysis - Further development - Fuzzy PID-control - Starting control - Wet Clutches
Classification code: 602.2 Mechanical Transmissions - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 921 Mathematics - 921.3 Mathematical Transformations
DOI: 10.3969/j.issn.1000-1298.2010.01.004
Database: Compendex
12. Accession number: 20101012752849
Title: Cutting temperature of cemented carbides base self-lubricated tool embedded with solid lubricants
Authors: Song, Wenlong1 ; Deng, Jianxin1 ; Wu, Ze1 ; Yan, Pei1 ; Zhang, Hui1
Author affiliation: 1 Department of Mechanical Engineering, Shandong University, Ji'nan 250061, China
Corresponding author: Deng, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 205-210
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: Microholes were made on the rake of the cemented carbide tools and MoS2 solid lubricants were embedded into the microholes to form self-lubricated tools (SLT-1). Dry machining tests on hardened steel were carried out with the self-lubricated tool, the tool with microholes on the rake without solid lubricants (SLT-2) and the conventional tool (SLT-3). The variation of cutting temperature for 45# hardened steel cutting with the three cutting tools were tested by the TH5104 thermo tracer. The result shows that the cutting temperature of SLT-1 self-lubricated tool decreased obviously. It deceased 15%~20% than that of SLT-3. And the cutting temperature of SLT-2 decreased 5%~10% than that of SLT-3. Through the analysis of cutting temperature distribution, it was observed that the cutting temperature decreased and the raked face resistance was improved since self-lubricating film on the rake face decreased the shear stress and the contact length between chip and tool.
Number of references: 14
Main heading: Cutting tools
Controlled terms: Carbide tools - Carbides - Friction - Hardening - Lubrication - Machine tools - Machining - Metal cutting - Molybdenum compounds - Solid lubricants - Tool steel - Wear of materials
Uncontrolled terms: Cemented carbides - Contact length - Cutting temperature - Cutting temperature distribution - Dry machining - Friction and wear properties - Friction and wear property - Hardened steel - Micro holes - Rake face - Self-lubricating
Classification code: 607.1 Lubricants - 607.2 Lubrication - 804.1 Organic Compounds - 951 Materials Science - 804.2 Inorganic Compounds - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 812.1 Ceramics - 605 Small Tools and Hardware - 604.2 Machining Operations - 421 Strength of Building Materials; Mechanical Properties - 537.1 Heat Treatment Processes - 545.3 Steel - 603.1 Machine Tools, General - 603.2 Machine Tool Accessories - 604.1 Metal Cutting
DOI: 10.3969/j.issn.1000-1298.2010.01.039
Database: Compendex
13. Accession number: 20101012752811
Title: Technology of regenerative vehicle active suspensions
Authors: Yu, Fan1 ; Zhang, Yongchao2
Author affiliation: 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China
2 State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Yu, F. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 1
Issue date: January 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: The regenerative vehicle active suspensions have become more and more attractive to many automotive researchers and engineers in recent years. The main benefits of a regenerative vehicle active suspension are the possible improvement of ride comfort and the regeneration of vibration energy with decreasing the energy consumption of active suspension. Above all, the state of the art on regenerative active suspension is reviewed. Then the electromagnetic suspension is summarized as the main type of regenerative suspension. In the end, the key problems in the development of the electromagnetic suspension are analyzed. With the improvement of electromagnetic technology, the electromagnetic regenerative suspension may become one of promising trends of vehicle active suspension.
Number of references: 42
Main heading: Suspensions (components)
Controlled terms: Automobile parts and equipment - Automobile suspensions - Electromagnetism - Suspensions (fluids) - Vehicles
Uncontrolled terms: Active suspension - Electromagnetic suspension - Energy consumption - Energy regeneration - Key problems - Ride comfort - Ride comforts - State of the art - Vibration energies
Classification code: 801.3 Colloid Chemistry - 701 Electricity and Magnetism - 663.2 Heavy Duty Motor Vehicle Components - 804 Chemical Products Generally - 662.4 Automobile and Smaller Vehicle Components - 601.2 Machine Components - 432 Highway Transportation - 632.1 Hydraulics
DOI: 10.3969/j.issn.1000-1298.2010.01.001
Database: Compendex
14. Accession number: 20101012752822
Title: Impacts of plant additive on the infiltration with sandy loam
Authors: Wang, Yan1 ; Zheng, Jian1, 2 ; Ji, Hong1 ; Fan, Xinjian1 ; Zhang, Weiyong1
Author affiliation: 1 College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2 Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Wang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 63-67
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Through laboratory experiments, the soil moisture infiltration characteristics and the distribution rule of soil moisture in wetting front are studied under the condition of different additives and proportions. Results show that the relationship between soil moisture diffusivity and soil water content can be better described by an exponential function. The soil with a certain additive can prolong the time of high moisture in the arable layer. The treatment with 3% and 1% maize leaf can improve soil water content effectively. The results can provide an engineering method for large scale soil improvement.
Number of references: 8
Main heading: Water content
Controlled terms: Additives - Diffusion in liquids - Exponential functions - Groundwater - Moisture determination - Permittivity - Seepage - Soil mechanics - Soil moisture - Underwater soils - Wetting
Uncontrolled terms: Distribution rule - Engineering methods - High moisture - Infiltration characteristic - Infiltration rate - Laboratory experiments - Sandy loams - Soil improvement - Soil water - Soil water content - Soil water diffusivity - Wetting fronts
Classification code: 944.2 Moisture Measurements - 708.1 Dielectric Materials - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids - 701 Electricity and Magnetism - 471.1 Oceanography, General - 444.2 Groundwater - 444 Water Resources - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.01.012
Database: Compendex
15. Accession number: 20101012752835
Title: Technology and equipment of stabilized storage of wheat germ by on-line multistage fluidization drying
Authors: Xu, Bin1 ; Dong, Ying1 ; Wu, Yanbo1 ; Wang, Chuyang2 ; Xu, Shanyuan3
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 Engineering Department, Zhengzhou Jingshen Grain Engineering Machinery Co., Ltd., Zhengzhou 450006, China
3 Productive Department, Fada Flour Group Co., Ltd., Xiajin 253216, China
Corresponding author: Dong, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 127-131
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 improve the stabilized storage of wheat germ (WG) and better prepare it for further processing, a fluidization drying technology is developed to solve the problem of wheat germ's acidification and deterioration. According to the WG character and the actual production, a multistage fluidized bed is designed and connected to wheat flour product line. With this equipment, temperature and airflow as major parameters are selected to test their respective influence on the wheat germ stabilization. The result shows that the optimized condition of fluidization drying is 45°C of outlet temperature. VE loss of processed WG is 6.28%, and the decrease of NSI is 1.11%. No distinct change is observed in its fatty acid composition and relative content. After 30 days' accelerate store, peroxide value is 7.2 mmol/kg, and acid value is 18.47 mg/g. The experiment result shows that the technology and equipment developed have satisfied the demands of stabilized storage of wheat germ.
Number of references: 12
Main heading: Fluidization
Controlled terms: Acids - Dewatering - Drying - Fatty acids - Fluid dynamics - Fluidized beds - Stabilization
Uncontrolled terms: Acid value - Fatty acid composition - Fluidization drying - Multi-stage fluidized bed - Optimized conditions - Outlet temperature - Peroxide value - Product-lines - Wheat flours - Wheat germ
Classification code: 951 Materials Science - 931.1 Mechanics - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 802.1 Chemical Plants and Equipment - 642.2 Industrial Furnaces and Components - 642.1 Process Heating - 631.1 Fluid Flow, General - 521.2 Combustors
DOI: 10.3969/j.issn.1000-1298.2010.01.025
Database: Compendex
16. Accession number: 20101012752845
Title: Pipe characteristics of high voltage circuit breaker with hydraulic operating mechanism
Authors: Liu, Wei1 ; Yang, Huayong1 ; Xu, Bing1 ; Wei, Zhongyong1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 182-187
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 550 kV high voltage circuit breaker with hydraulic operating mechanism is taken as the investigation subject. The pressure loss in pipe and the pressure wave propagation in the process of opening and closing motion are analyzed. The model of the pressure loss in pipe and the model of the pressure wave distributed parameter are established. Simulation is carried out by using AMEsim software. The influence of the pipe characteristics and structure parameters on the system performance is discussed. The simulation results are thought to be in accordance with the experiment results. It shows that the models are correct.
Number of references: 9
Main heading: Pipe
Controlled terms: Capacitance - Circuit breaking arcs - Computer software - Electric circuit breakers - Electricity - Hydraulics - Wave propagation
Uncontrolled terms: Closing velocity - Distributed parameter - High voltage circuit breaker - Hydraulic operating mechanisms - In-pipe - Pressure loss - Pressure wave propagation - Pressure waves - Simulation result - Structure parameter
Classification code: 723 Computer Software, Data Handling and Applications - 711 Electromagnetic Waves - 706.2 Electric Power Lines and Equipment - 704.2 Electric Equipment - 751.1 Acoustic Waves - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 632.1 Hydraulics - 619.1 Pipe, Piping and Pipelines - 703.1 Electric Networks
DOI: 10.3969/j.issn.1000-1298.2010.01.035
Database: Compendex
17. Accession number: 20101012752836
Title: Extracting technology and antioxidant activity of bioactive components from clove
Authors: Jiang, Shenhua1 ; Wang, Shuyuan1 ; Ma, Haile1 ; Wang, Zhenbin1 ; Wu, Shiyun1 ; Wang, Changlu2
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China
Corresponding author: Wang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 132-138
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The extracting technology and antioxidant activity of bioactive components from clove were studied. The results showed that the optimal parameters of the extracting technology were as follows, the concentration of ethanol was 60%, the extracting temperature was 60°C, the ratio of sample to extracting solution was 1:20, and the extracting time was 40 min. The recovery ratio of bioactive compounds from clove was (10480.4±40.3) μmol/g in this extracting technology. The crude extracts obtained from this extracting technology were proved to have strong antioxidant activity. The reducibility of the crude extracts was weaker than those of two positive controls (BHT and VC) (P<0.01 or P<0.001). The FRAP values and the activity of scavenging DPPH radicals of the crude extracts were weaker than those of VC and stronger than those of BHT (P<0.05, P<0.01 or P<0.001). It was found by using the bioassay guided method that the bioactive antioxidants of clove were mainly attributed to the ethyl acetate fraction. The reducibility (OD 700 nm) and FRAP values (OD 593 nm) of the sample of the ethyl acetate fraction with the concentration of 100 μg/mL were 0.634±0.040 and 0.433±0.005, respectively. The percentage of scavenging DPPH radicals of the same sample was (85.294±0.499)%. The result of correlation analysis showed that the strong antioxidant activity mainly resulted from the high contents of the total phenols and total flavonoids.
Number of references: 20
Main heading: Extraction
Controlled terms: Bioassay - Esters - Ethanol - Phenols - Technology
Uncontrolled terms: Antioxidant activities - Antioxidant activity - Bioactive components - Bioactive compounds - Concentration of - Correlation analysis - Crude extract - Ethyl acetates - Flavonoids - High-content - Optimal parameter - Recovery ratio - Total phenols
Classification code: 461.6 Medicine and Pharmacology - 523 Liquid Fuels - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 901 Engineering Profession
DOI: 10.3969/j.issn.1000-1298.2010.01.026
Database: Compendex
18. Accession number: 20101012752816
Title: Adaptive fuzzy sliding mode control for hydrostatic transmission system
Authors: Liu, Tao1 ; Liu, Qinghe1 ; Jiang, Jihai2
Author affiliation: 1 School of Automobile Engineering, Harbin Institute of Technology, Weihai 264209, China
2 School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
Corresponding author: Liu, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 29-33
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Aiming at the speed control of hydrostatic transmission system, a design method of adaptive fuzzy sliding mode control with friction torque dynamic compensation is proposed. The friction torque dynamic compensation method is introduced to enhance the response of the system. The adaptive fuzzy controller is introduced to solve the problem of the uncertain parameters and external disturbances of the system, so that the design of controller can be performed without accurate model. The adaptive law derived by Lyapunov method can guarantee the stability of control system and reduce the high frequency chattering. Simulation results show that the control approach can decrease the tracking error, enhance the system's robustness and attenuate the high frequency chattering in the control signal.
Number of references: 10
Main heading: Adaptive control systems
Controlled terms: Control system stability - Controllers - Dynamic response - Friction - Fuzzy control - Hydraulics - Hydrodynamics - Hydrostatic pressure - Lyapunov methods - Sliding mode control - Spatial variables control - Structural design - Uncertainty analysis - Variable structure control
Uncontrolled terms: Adaptive fuzzy control - Adaptive fuzzy controller - Adaptive fuzzy sliding-mode controls - Adaptive laws - Control approach - Control signal - Design method - Dynamic compensation - External disturbances - Friction torque - High frequency - Hydrostatic transmission - Simulation result - Sliding mode variable structure control - Stability of control - Tracking errors - Uncertain parameters
Classification code: 961 Systems Science - 731.3 Specific Variables Control - 731.4 System Stability - 732.1 Control Equipment - 921 Mathematics - 922.1 Probability Theory - 931.1 Mechanics - 731.1 Control Systems - 723.4 Artificial Intelligence - 632.1 Hydraulics - 631.2 Hydrodynamics - 631.1.1 Liquid Dynamics - 408.1 Structural Design, General - 731 Automatic Control Principles and Applications
DOI: 10.3969/j.issn.1000-1298.2010.01.006
Database: Compendex
19. Accession number: 20101012752841
Title: NH3 emission factors of fattening pig buildings with different floor systems
Authors: Wang, Kaiying1 ; Dai, Xiaorong1 ; Li, Zhenyu2 ; Wei, Bo1
Author affiliation: 1 School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2 Zhejiang Environmental Monitoring Center, Hangzhou 310012, China
Corresponding author: Wang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 163-166
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: Ammonia (NH3) and other air pollution emissions from concentrated animal feeding operations (CAFOs) are becoming more and more serious with the rapid development of livestock and poultry production in recent years. The ammonia emission factor is one of the effective methods for estimating ammonia emissions from CAFOs and evaluating of emission reduction technologies. A continual monitoring system of the NH3 concentration and environmental parameters is used in this research, and the ammonia emission factors and impact factors of the three types of floor systems in the pig buildings are studied. Mean daily emissions per pig fattened on the semi-slatted floor system, concrete floor system, and deep-litter system are (9.47±7.09), (11.23±4.23), (4.27±2.09)g/(d · pig), respectively.
Number of references: 8
Main heading: Floors
Controlled terms: Agriculture - Air quality - Ammonia - Concrete construction - Dairies
Uncontrolled terms: Ammonia emissions - Concentrated animal feeding operations - Concrete floor - Emission factors - Emission reduction - Environmental parameter - Floor systems - Impact factor - Monitoring system - Pig building - Poultry production - Rapid development - Slatted floor - System emission
Classification code:822.1 Food Products Plants and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.2 Inorganic Compounds - 451.2 Air Pollution Control - 443.1 Atmospheric Properties - 412 Concrete - 405 Construction Equipment and Methods; Surveying - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers
DOI: 10.3969/j.issn.1000-1298.2010.01.031
Database: Compendex
20. Accession number: 20101012752837
Title: Enzymatic modification of casein hydrolysates by plastein reaction and improvement in antioxidant activity
Authors: Wu, Dan1 ; Li, Tiejing1 ; Zhao, Xinhuai1
Author affiliation: 1 Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Zhao, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 139-145
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: Casein hydrolysates were prepared by hydrolysis of casein with papain, and then modified by papain-catalyzed plastein reaction to prepare antioxidant peptides with higher activity. Response surface analysis was conducted to optimize the conditions of plastein reaction with the variations of free amino groups in reaction mixture used as index. The optimal conditions obtained were that enzyme addition level was 500 U/g, temperature was 30°C, concentration of hydrolysates was 50% and reaction time was 5.6 h. The analysis results from capillary electrophoresis confirmed that the peptide compositions of modified products were different from that of casein hydrolysates. The antioxidant activities of three modified products were also analyzed, which indicated that their scavenging activities for three free radicals were enhanced obviously.
Number of references: 20
Main heading: Surface reactions
Controlled terms: Capillary electrophoresis - Casein - Free radical reactions - Free radicals - Peptides - Surface analysis - Surface properties
Uncontrolled terms: Analysis results - Antioxidant activities - Antioxidant peptides - Casein hydrolysate - Concentration of - Enzymatic modification - Free amino groups - Modified products - Optimal conditions - Reaction mixture - Reaction time - Response surface analysis - Scavenging activities
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 822.3 Food Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.2 Chemical Reactions - 801.4.1 Electrochemistry - 801.3 Colloid Chemistry - 701.1 Electricity: Basic Concepts and Phenomena - 461.9 Biology - 423 Non Mechanical Properties and Tests of Building Materials
DOI: 10.3969/j.issn.1000-1298.2010.01.027
Database: Compendex
21. Accession number: 20101012752818
Title: Design and experiment of a vehicular speech recognition system
Authors: Wang, Dengfeng1 ; Cao, Xiaolin1 ; Yu, Jilong1
Author affiliation: 1 State Key Laboratory of Automotive Dynamic Simulation, Jilin University, Changchun 130025, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 41-45
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An improved dynamic time warping (DTW) speech recognition method is proposed. An electronic control unit of vehicular speech recognition system is developed based on chip microcontroller SPCE061A. The corresponding control software is programmed and the speech recognition tests are carried out under the different noise conditions within an experimental vehicle. The test results show that the speech recognition ratio reduces with the increase of the vehicle interior noise level and the speech length. The average recognition ratio is 90% for two Chinese characters speech and 85% for four Chinese characters speech when the vehicle is under the idle running condition and the interior noise is less than 50 dB(A). And the average recognition ratio is 85% for two Chinese characters speech and 80% for four Chinese Characters speech when the vehicle is under the fixation and half-throttle running condition and the interior noise level range is from 60 to 70 dB(A). The speech recognition results are satisfactory.
Number of references: 5
Main heading: Speech recognition
Controlled terms: Acoustic noise measurement - Electronics industry - Experiments - Power electronics - Sanitary sewers - Vehicles - Weaving
Uncontrolled terms: Chinese characters - Control software - Dynamic time warping - Dynamic time warping method - Electronic control units - Experimental vehicle - Interior noise - Noise conditions - On chips - Recognition ratio - Running conditions - Speech recognition system - Speech recognition systems - Test results - Vehicle interior noise
Classification code: 941.2 Acoustic Variables Measurements - 715.2 Industrial Electronic Equipment - 723.5 Computer Applications - 751.4 Acoustic Noise - 751.5 Speech - 819.5 Textile Products and Processing - 901.3 Engineering Research - 715 Electronic Equipment, General Purpose and Industrial - 713.5 Other Electronic Circuits - 713 Electronic Circuits - 712 Electronic and Thermionic Materials - 452.1 Sewage - 432 Highway Transportation - 714 Electronic Components and Tubes
DOI: 10.3969/j.issn.1000-1298.2010.01.008
Database: Compendex
22. Accession number: 20101012752829
Title: Main technological parameters of rice hull hot briquetting
Authors: Sun, Liang1 ; Sun, Qing1 ; Jie, Xin1 ; Gao, Lianxing1
Author affiliation: 1 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
Corresponding author: Gao, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 96-100
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 develop the rice hull hot briquetting technology and machine, the effect of briquetting pressure, heating temperature, moisture and the ratio of rice hull to binder on briquetting laxation density was studied based on the quadratic regression orthogonal rotation tests with four factors and response face method. Functional models of briquetting laxation density were established and analyzed by SPSS 11.5 and Matlab 7.1. The results showed that the effect order of four factors was as follows: heating temperature, moisture, briquetting pressure, and ratio of rice hull to binder. When briquetting pressure, ratio of rice hull to binder, moisture, and heating temperature were 10 MPa, 3.5:1, 16%, and 100°C respectively, the optimum conditions were obtained and the briquetting laxation density reached to 0.945 g/cm3, which was suitable to briquetting. The regression equation was significant, and the mathematical model for the simulation was presented.
Number of references: 7
Main heading: Briquetting
Controlled terms: Binders - Heating - Mathematical models - MATLAB - Moisture - Pressure effects
Uncontrolled terms: Functional model - Heating temperatures - Optimum conditions - Quadratic regression - Regression equation - Rice hull - Rice hulls - Technological parameters
Classification code: 921 Mathematics - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 801.4 Physical Chemistry - 723.5 Computer Applications - 931.1 Mechanics - 723.1.1 Computer Programming Languages - 642.1 Process Heating - 534.2 Foundry Practice - 524 Solid Fuels - 443.1 Atmospheric Properties - 643.1 Space Heating
DOI: 10.3969/j.issn.1000-1298.2010.01.019
Database: Compendex
23. Accession number: 20101012752846
Title: Modeling and experiment study on fluid character of axial piston pump
Authors: Ma, Jien1 ; Xu, Bing1 ; Yang, Huayong1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 188-194
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 study the fluid character of axial piston pump, a mathematical model of flow condition in piston chamber was developed with compressibility of fluid oil. The model was further improved by analysis of movement model of piston, cross area of valve plate, throttle coefficient, flow loss inside pump, etc. Besides, the model of whole piston pump with its hydraulic system was developed with lamped parameter method. A simulation system was built by using Matlab based on the mathematical pump model. A visual graphical user interface was established to automatically analyze the relation between pump geometric structure, working conditions, system parameters and flow conditions of pump. The flow conditions of the pump were tested by using pump flow ripple test rig. It is shown that the pressure pulsation and flow ripple results calculated by the mathematical model agree well with the experimental results. The analytical error can be controlled within 5%. It can be concluded that the developed mathematical model has high precision and can accurately predict the fluid character of axial piston pump.
Number of references: 13
Main heading: Mathematical models
Controlled terms: Computer simulation - Fluids - Graphical user interfaces - Hydraulic equipment - MATLAB - Reciprocating pumps
Uncontrolled terms: Analytical errors - Axial piston pump - Experiment study - Flow condition - Flow loss - Flow ripple - Geometric structure - High precision - Hydraulic system - Movement model - Parameter methods - Piston pump - Pressure pulsation - Pump flow - Pump models - Simulation systems - Test rigs - Working conditions
Classification code: 932.2 Nuclear Physics - 931.1 Mechanics - 921 Mathematics - 723.5 Computer Applications - 723.1.1 Computer Programming Languages - 722.2 Computer Peripheral Equipment - 632.2 Hydraulic Equipment and Machinery - 631 Fluid Flow - 618.2 Pumps
DOI: 10.3969/j.issn.1000-1298.2010.01.036
Database: Compendex
24. Accession number: 20101012752839
Title: Numerical simulation of the thermal environment in a mechanically ventilated greenhouse
Authors: Wu, Feiqing1, 2 ; Zhang, Libin1 ; Xu, Fang1 ; Chen, Jiaoliao1 ; Chen, Xiao1
Author affiliation: 1 Key Laboratory of Mechanical Manufacture and Automation, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310032, China
2 School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 153-158
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 modeling method of the thermal distribution in glass greenhouse with mechanical ventilation was proposed based on the CFD technique. The flow regime, which was proved to be turbulent, was modeled by using the standard turbulence model, as well as the crop model, solar radiation and thermal radiation model. The numerical solution was made by applying a finite volume discretization code with the SIMPLE algorithm, and then the velocities and temperatures at key points were measured in a Venlo-type greenhouse. The temperature error and the mean absolute temperature error were controlled in 3°C and 10% respectively except few data. The results indicate that the CFD-based model is effective.
Number of references: 18
Main heading: Mathematical models
Controlled terms: Computational fluid dynamics - Computer simulation - Fluid dynamics - Glass - Greenhouses - Numerical analysis - Sun - Temperature measurement - Ventilation - Vibrations (mechanical)
Uncontrolled terms: Absolute temperatures - CFD technique - Crop model - Finite volume discretizations - Flow regimes - Keypoints - Mechanical ventilation - Modeling method - Numerical simulation - Numerical solution - SIMPLE algorithm - Temperature error - Thermal distributions - Thermal environment - Thermal radiation models
Classification code: 944.6 Temperature Measurements - 931.1 Mechanics - 921.6 Numerical Methods - 921 Mathematics - 821.6 Farm Buildings and Other Structures - 812.3 Glass - 723.5 Computer Applications - 657.2 Extraterrestrial Physics and Stellar Phenomena - 643.5 Ventilation - 631.1.2 Gas Dynamics - 631.1.1 Liquid Dynamics - 631.1 Fluid Flow, General - 402.1 Industrial and Agricultural Buildings
DOI: 10.3969/j.issn.1000-1298.2010.01.029
Database: Compendex
25. Accession number: 20101012752828
Title: Mechanical properties and micro-structure of wheat roots
Authors: Guo, Weijun1 ; Huang, Gaobao2 ; Wang, Fene2 ; Luo, Liuyuan1 ; Zhang, Minglang1
Author affiliation: 1 Department of Building Engineering, Lanzhou Polytechnical College, Lanzhou 730050, China
2 Engineering College, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author: Huang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 92-95
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The mechanical properties of wheat roots in mature were tested, and the curves on stress-strain of wheat roots were measured by the electronic testing machine CMT2502. The micro-structure of wheat roots was observed, and the SEM images of wheat roots were scanned by electron microscope. The relation between mechanical properties and micro-structure of wheat roots was analyzed, and mechanical model of wheat roots was established. The results showed that wheat root was a typical porous, no-continuous, no-homogeneous and anisotropic composite material. Wheat roots had enough strength and good flexibility, and its carrying capacity depended on the thickness of thick-walled cells and the numbers of vascular bundles, as well as the connection form and strength of cells in roots. The strength of primary root and secondary root were 21.21~57.25 MPa and 3.08~13.07 MPa, respectively.
Number of references: 10
Main heading: Mechanical properties
Controlled terms: Biomechanics - Composite micromechanics - Strain - Stresses - Structural properties
Uncontrolled terms: Anisotropic composites - Carrying capacity - Connection forms - Electronic testing - Mechanical model - Primary roots - SEM image - Stress-strain - Vascular bundle - Wheat roots
Classification code: 408 Structural Design - 408.1 Structural Design, General - 421 Strength of Building Materials; Mechanical Properties - 461.3 Biomechanics, Bionics and Biomimetics - 931.1 Mechanics - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.01.018
Database: Compendex
26. Accession number: 20101012752840
Title: Digital construction of plant growth model in greenhouse
Authors: Tang, Weidong1 ; Zhu, Ping1 ; Guo, Chen1 ; Liu, Changxin1 ; Li, Pingping2 ; Lu, Zhangping3
Author affiliation: 1 School of Information and Multi-Media Science, Jinggangshan University, Ji'an 343009, China
2 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
3 Institute of Graphics Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Tang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 159-162 166
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 features of plant growth could be extracted from the experimental results, and the morphological model of plant could be constructed with the parameter of accumulative growing degree day. Additionally, the digital growth model of plant could be performed using information reconstruction method such as information normalization and mapping process. The experiment results showed that the proposed method was effective in dynamically simulating the plant growth under the interaction of environment. It could provide valuable evidences for real time obtaining and determining the proper conditions for plant development.
Number of references: 11
Main heading: Plant life extension
Controlled terms: Greenhouses
Uncontrolled terms: Digital construction - Digital growth - Digitalization - Information reconstruction - Mapping process - Morphological model - Plant development - Plant growth - Real time
Classification code: 402.1 Industrial and Agricultural Buildings - 821.6 Farm Buildings and Other Structures - 912.1 Industrial Engineering
DOI: 10.3969/j.issn.1000-1298.2010.01.030
Database: Compendex
27. Accession number: 20101012752823
Title: Design of a laser scanner for characterizing soil surface roughness
Authors: Cai, Xiang1 ; Sun, Yurui1 ; Lin, Jianhui2 ; Schulze Lammers, P.3
Author affiliation: 1 Research Center for Precision Farming, China Agricultural University, Beijing 100083, China
2 School of Technology, Beijing Forestry University, Beijing 100083, China
3 Department of Agricultural Engineering, University of Bonn, Bonn 53115, Germany
Corresponding author: Sun, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 68-71 91
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: Soil surface roughness has been widely used for characterizing soil surface profile. To rapidly measure soil surface roughness in situ, a laser scanner is developed based on triangulation principle. Compared with traditional instruments, this device has higher measurement resolution (0.1 mm), precision positioning ability (1 mm), and efficiency. A PDA (personal digital assistant) is used as data-logger, which can meet the requirements of portability, large data memory, and real-time data processing in field.
Number of references: 12
Main heading: Soils
Controlled terms: Data processing - Laser applications - Metal analysis - Personal digital assistants - Scanning - Sensors - Surface properties - Surface roughness - Triangulation
Uncontrolled terms: Datalogger - In-field - In-situ - Large data - Laser distance sensors - Laser scanner - Measurement resolution - Precision positioning - Real-time data processing - Soil surfaces
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 801 Chemistry - 744.9 Laser Applications - 741.3 Optical Devices and Systems - 732.2 Control Instrumentation - 723.2 Data Processing and Image Processing - 722 Computer Systems and Equipment - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 405.3 Surveying
DOI: 10.3969/j.issn.1000-1298.2010.01.013
Database: Compendex
28. Accession number: 20101012752833
Title: Effects of modified atmosphere on the preservation of Pteridium aquilinum
Authors: Guo, Yanyin1 ; Wang, Xiangyou1 ; Zhang, Yao1
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: 1
Issue date: January 2010
Publication year: 2010
Pages: 117-121 126
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 research the effects of modified atmosphere on the preservation of Pteridium aquilinum during storage period, the SOD and POD activity, respiration rate and ethylene release, fresh and dry weight, MDA, chlorophyll, soluble sugar and VC content were studied by setting different CO2 and O2 proportion. Results showed that, proper CO2 and O2 proportion can maintain the higher SOD and POD activity, decrease the content of MDA, keep the respiration rate and ethylene release appropriately, reduce the loss of dry and fresh weight, eventually avail to the preservation of chlorophyll, soluble sugar and VC content. In this experiment, the optimal CO2 and O2 proportion is 2% and 6%, second is 6% and 10%. The combination could commendably retain the quality of Pteridium aquilinum up to above 15 d.
Number of references: 17
Main heading: Food preservation
Controlled terms: Chlorophyll - Ethylene - Porphyrins - Software architecture - Sugar (sucrose)
Uncontrolled terms: Dry weight - Fresh weight - Modified atmosphere - Respiration rate - Soluble sugars - Storage periods
Classification code: 723.1 Computer Programming - 723.5 Computer Applications - 801.2 Biochemistry - 804.1 Organic Compounds - 822.2 Food Processing Operations - 822.3 Food Products
DOI: 10.3969/j.issn.1000-1298.2010.01.023
Database: Compendex
29. Accession number: 20101012752851
Title: Friction and wear of cam with laser micro-texture under lubrication
Authors: Fu, Yonghong1 ; Yang, Wei1 ; Zhang, Huawei1 ; Hua, Xijun1
Author affiliation: 1 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Fu, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 216-220
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Steel-45 surface was treated as micro-texture (groove patterns and concave patterns) by using laser micro-texturing technology. Friction and wear properties of the textured samples were examined by using an UMT-2 wear tester in cam/roller simulation work condition. As the results, the laser micro-texturing surface was significantly improved in the anti-scuffing property and wear resistance compared with the conventional smooth surface. The textured surfaces with groove patterns had higher friction coefficients than the conventional smooth surfaces, while the textured surfaces with concave patterns had lower friction coefficients than the conventional smooth surfaces. The results indicated that the groove patterns on the working surface increase friction and the cavity patterns on the working surface can reduce friction. It can be concluded that an optimal friction reduction effect of the textured surface can be obtained by choosing a suitable concave depth and the ratio of the projected area of the concaves with the total area of the working surface.
Number of references: 17
Main heading: Friction
Controlled terms: Cams - Metal drawing - Molybdenum plating - Surfaces - Textures - Texturing - Tribology - Wear resistance
Uncontrolled terms: Anti-scuffing - Cavity patterns - Friction and wear - Friction and wear properties - Friction coefficients - Friction reduction - Geometrical texture - Groove patterns - Micro-texture - Projected area - Smooth surface - Steel-45 - Textured surface - Tribological properties - Wear tester - Work condition
Classification code: 951 Materials Science - 933 Solid State Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 819.5 Textile Products and Processing - 801.4 Physical Chemistry - 604.2 Machining Operations - 601.3 Mechanisms - 543.3 Molybdenum and Alloys - 539.3 Metal Plating - 535.2 Metal Forming - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.01.041
Database: Compendex
30. Accession number: 20101012752832
Title: Effect of 1-methylcyclopropene (1-MCP) on lignification and cell ultrastructure of peeled water bamboo shoot
Authors: Song, Lili1 ; Gao, Haiyan1 ; Fang, Xiangjun1 ; Mao, Jinlin1 ; Zhou, Yongjun1 ; Chen, Hangjun1
Author affiliation: 1 Institute of Food Processing, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
Corresponding author: Gao, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 111-116
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 effect of 1-MCP treatments on lignification and cell ultrastructure of peeled water bamboo shoot was investigated under the storage conditions of normal and low temperature. The results indicated that 0.5 μL/L of 1-MCP treatment could keep good sensory quality and inhibit the ethylene production rate. It could also markedly reduce the increase of cellulose content, the decrease of water soluble pectin content, and the increase of protopectin content, and inhibit the lignification of peeled water bamboo shoot. Transmission electron microscope was used to observe the ultrastructure of peeled water bamboo under the storage conditions of normal temperature. The results showed that the cell inclusions of peeled water bamboo shoot treated with 1-MCP were rich and the degradation of plasmodesma was inhibited compared with the control, which further indicated the inhibition of 1-MCP on lignification of peeled water bamboo shoot.
Number of references: 13
Main heading: Bamboo
Controlled terms: Electron microscopes - Ethylene - Image storage tubes - Transmission electron microscopy - Water content - Water treatment
Uncontrolled terms: 1-MCP - 1-methylcyclopropene (1-MCP) - Cellulose content - Ethylene production - Lignification - Low temperatures - Protopectin - Sensory qualities - Storage condition - Transmission electron microscope - Water soluble pectins
Classification code: 932 High Energy Physics; Nuclear Physics; Plasma Physics - 931 Classical Physics; Quantum Theory; Relativity - 821.4 Agricultural Products - 811.1 Pulp and Paper - 804.1 Organic Compounds - 741.3 Optical Devices and Systems - 714.1 Electron Tubes - 445.1 Water Treatment Techniques - 444 Water Resources
DOI: 10.3969/j.issn.1000-1298.2010.01.022
Database: Compendex
31. Accession number: 20101012752824
Title: Measurement of soil moisture based on phase detecting principle
Authors: Wang, Kedong1 ; Wang, Yiming2 ; Feng, Lei2 ; Yang, Weizhong2
Author affiliation: 1 College of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China
2 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Wang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 72-76
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The basic principle of time domain reflectometry used for soil moisture measurement is introduced, and the disadvantages of currently available TDR instruments are discussed as well as their advantages. A new TDR system, called P-TDR, composed of a high-frequency signal generator, a phase detector, a microprocessor and a soil moisture probe is developed. Single-frequency sinusoidal voltage signal is adopted as test signal, and the travel time of the test signal along with probe embedded in moist soil is measured by a phase detector instead of high-speed sampling oscilloscope, from which the soil water content will be estimated. It has high accuracy and resolution in travel time measurement. Calibration experiments are conducted in sand, loam soil and clayey loam soil samples with the volumetric water contents varied from zero to saturation. The experimental results show that the measuring deviation is less than 0.03 between PTDR and gravimetric sampling method.
Number of references: 8
Main heading: Soil surveys
Controlled terms: Antenna phased arrays - Cathode ray oscilloscopes - Groundwater - Moisture determination - Permittivity - Phase locked loops - Probes - Signal detection - Signal generators - Soil moisture - Time measurement - Underwater soils - Water content
Uncontrolled terms: Basic principles - Dielectric constant - Dielectric constants - Gravimetric sampling - High frequency signals - High speed sampling - Loam soils - Measuring deviation - Moist soil - Phase detecting - Phase detectors - Single-frequency - Sinusoidal voltage - Soil moisture measurement - Soil water content - Test signal - Time Domain Reflectometry - Travel time - Travel time measurements - Volumetric water content
Classification code: 944.2 Moisture Measurements - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 942.2 Electric Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 943.3 Special Purpose Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 715 Electronic Equipment, General Purpose and Industrial - 406.2 Roads and Streets - 444 Water Resources - 444.2 Groundwater - 713.5 Other Electronic Circuits - 471.1 Oceanography, General - 701 Electricity and Magnetism - 708.1 Dielectric Materials - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.01.014
Database: Compendex
32. Accession number: 20101012752838
Title: Optimization of the liquid state fermentation technology of litchi vinegar
Authors: Song, Hongbo1 ; An, Fengping1 ; Wang, Huijuan1 ; Wang, Jinliang1 ; He, Jing1
Author affiliation: 1 College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Corresponding author: Song, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 146-152
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: The alcoholic and acetic acid liquid state fermentation technology of Litchi vinegar were studied. Experiments showed that the suitable addition of 4 g/L polypeptide before alcoholic fermentation could promote microbial strains growth and the flavor compound formation of total esters and amino nitrogen. The alcoholic fermentation was optimized by means of quadratic general rotary unitized design. The optimized condition was 0.15% inoculation volume (the volume proportion of Anqi to CICC 1312 was 2:1), 18 g/(100 mL) reducing sugar, 30°C fermentation temperature, pH value 4.5. The alcohol content was 9.76% under the optimized condition. The acetic acid fermentation was optimized by means of L9(34) orthogonal test. The optimized result was 10% inoculation volume of AS 1.41, 33°C fermentation temperature and 6% alcohol content. Under the condition, Litchi vinegar had 5.99 g/(100 mL) acidity, 0.48 g/L total esters and 59.8 mg/(100 mL) amino nitrogen.
Number of references: 13
Main heading: Fermentation
Controlled terms: Acetic acid - Acids - Esterification - Esters - Liquids - Optimization - pH effects - Sugar (sucrose) - Technology
Uncontrolled terms: Acetic acid fermentation - Alcohol contents - Alcoholic fermentation - Amino nitrogen - Fermentation temperature - Flavor compound - Liquid state fermentation - Litchi - Microbial strain - Optimized conditions - Orthogonal test - pH value - Reducing sugars - Technology optimization
Classification code: 921.5 Optimization Techniques - 901 Engineering Profession - 822.3 Food Products - 805.1.1 Biochemical Engineering - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 804 Chemical Products Generally - 802.2 Chemical Reactions - 801.2 Biochemistry - 801.1 Chemistry, General - 461.8 Biotechnology - 803 Chemical Agents and Basic Industrial Chemicals
DOI: 10.3969/j.issn.1000-1298.2010.01.028
Database: Compendex
33. Accession number: 20101012752847
Title: Accurate recognition method for cross-section data feature points of blades
Authors: Qu, Weiwei1 ; Gao, Feng1 ; Du, Farong1 ; Zhou, Yu1 ; Li, Xuexue1
Author affiliation: 1 School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
Corresponding author: Qu, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 195-199
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: Wavelet modulus maximum method can be used to recognize the features and restrain the noise. However, some important local features would disappear in the finest scales when using this method to recognize the whole cross-section data. The concept of characteristic scale factor was proposed to find out the differences of the features contained in the cross-section data. When the characteristic scale factor was larger, the numbers of the decomposable scales would become more and more, and vice versa. The cross-section data can be divided into several sections to be recognized respectively when the features of the cross-section data differed considerably. And the feature points of each section would be integrated finally. The experimental results show that the shape-scale factor can reflect the information contained in the signal well and guide features recognition. This recognition method can ensure the integrity of the feature numbers effectively.
Number of references: 6
Main heading: Instrument scales
Uncontrolled terms: Data feature - Feature point - Feature recognition - Features recognition - Local feature - Recognition methods - Scale Factor - Wavelet modulus maxima
Classification code: 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI: 10.3969/j.issn.1000-1298.2010.01.037
Database: Compendex
34. Accession number: 20101012752819
Title: Spatial variability of soil water retention curve in different soil layers and its affecting factors
Authors: Liu, Jilong1 ; Ma, Xiaoyi1 ; Zhang, Zhenhua2
Author affiliation: 1 College of Hydraulic and Architectural Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
2 Geography and Planning Department, Ludong University, Yantai 264025, China
Corresponding author: Ma, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 46-52
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Spatial variability of van Genuchten model parameters and its affecting factors in 0~20 cm and 20~40 cm soil layers were studied with multifractal and joint multifractal methods. The results showed that in 0~20 cm and 20~40 cm soil layers parameter had obvious multifractal characteristics, and its spatial variability was strong caused by the distribution of lower and higher values respectively. The multifractal characteristics of parameter n and θs were not obvious, and the spatial variability was weak. Correlation characteristics between van Genuchten model parameters α and soil physical properties in 0~20 cm and 20~40 cm soil layers were analyzed. At the observation scale, the correlations between parameter n and sand and silt content were significant, the parameter n and sand and organic matter content had remarkable relationship, and θs was significantly related to sand content in 0~20 cm soil layer. The relationship between parameters α and organic matter content was remarkable, and the parameter n and θs were significantly related to sand, silt and organic matter content in 20~40 cm soil layer. At the multiple scales, correlations between parameters α and sand and silt content were most obvious in 0~20 cm soil layer, and parameters α were remarkably related to bulk density and organic matter content in 20~40 cm soil layer.
Number of references: 21
Main heading: Geologic models
Controlled terms: Biogeochemistry - Biological materials - Fractals - Organic compounds - Sand - Silt - Soil moisture - Underwater soils
Uncontrolled terms: Affecting factors - Bulk density - Multi fractals - Multifractal characteristics - Multiple scale - Organic matter content - Sand content - Silt contents - Soil layer - Soil physical property - Soil water retention curves - Spatial variability - Van Genuchten model
Classification code: 921 Mathematics - 804.1 Organic Compounds - 801.2 Biochemistry - 505 Mines and Mining, Nonmetallic - 483.1 Soils and Soil Mechanics - 481.2 Geochemistry - 481.1 Geology - 471.1 Oceanography, General - 461.2 Biological Materials and Tissue Engineering
DOI: 10.3969/j.issn.1000-1298.2010.01.009
Database: Compendex
35. Accession number: 20101012752813
Title: Integrated chassis control based on multivariable frequency domain control methods
Authors: Zhu, Bing1 ; Li, Youde1 ; Zhao, Jian1 ; Li, Jing1
Author affiliation: 1 College of Automotive Engineering, Jilin University, Changchun 130025, China
Corresponding author: Zhu, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 14-17 13
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An integrated chassis control approach based on the multivariable frequency domain control methods was proposed to coordinate the active steering system and the active braking system. The multivariable vehicle system was analyzed, and the integrated chassis controller was designed by using the multivariable frequency domain control methods. A typical case was simulated on the co-simulation platform with Matlab and AMESim. The simulation results showed that the controller could eliminate the interference and coupling between the active steering system and the active braking system, and improve the vehicle handling and stability performance effectively.
Number of references: 10
Main heading: Frequency domain analysis
Controlled terms: Automobile parts and equipment - Automobile steering equipment - Brakes - Braking - Controllers - MATLAB - Multivariable systems - Steering
Uncontrolled terms: Active steering - Braking system - Chassis control - Control methods - Cosimulation - Frequency domain control - Frequency domains - Multi variables - Simulation result - Stability performance - Vehicle handling - Vehicle system
Classification code: 921.3 Mathematical Transformations - 921 Mathematics - 732.1 Control Equipment - 731.1 Control Systems - 723.5 Computer Applications - 961 Systems Science - 723.1.1 Computer Programming Languages - 671.2 Ship Equipment - 663.2 Heavy Duty Motor Vehicle Components - 662.4 Automobile and Smaller Vehicle Components - 602 Mechanical Drives and Transmissions - 703.1.1 Electric Network Analysis
DOI: 10.3969/j.issn.1000-1298.2010.01.003
Database: Compendex
36. Accession number: 20101012752831
Title: Ethanol production from Jerusalem artichoke using Schizosaccharomyces pombe
Authors: Wang, Lunji1, 2 ; Dong, Ying1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Food and Bioengineering, Henan University of Science a and Technology, Luoyang 471003, China
Corresponding author: Dong, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 106-110 116
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 ethanol fermentation capability of Schizosaccharomyces pombe from inulin was investigated. The effects of temperature, inulin concentration, and initial pH value on the ethanol fermentation were studied. The ethanol production from Jerusalem artichoke juice and flour were further studied. Experimental results showed that S. pombe demonstrated good ethanol fermentation performance. The optimum initial pH value was 4.0, and the optimum temperature was 30°C. Under the optimal conditions, the maximum ethanol concentration of 74.58 g/L, equivalent to 81.24% of the theoretical yield, was reached from 200 g/L inulin concentration after 72 h of incubation. Higher theoretical conversion rates of 84.02% and 86.09% were obtained when Jerusalem artichoke juice and flour were directly used in fermentation, respectively.
Number of references: 20
Main heading: pH effects
Controlled terms: Ethanol - Fermentation - Saccharification
Uncontrolled terms: Conversion rates - Effects of temperature - Ethanol concentrations - Ethanol fermentation - Ethanol production - Initial pH value - Jerusalem artichoke - Optimal conditions - Optimum temperature - Schizosaccharomyces pombe - Simultaneous saccharification and fermentation - Theoretical yield
Classification code: 805.1.1 Biochemical Engineering - 804.1 Organic Compounds - 802.2 Chemical Reactions - 811.3 Cellulose, Lignin and Derivatives - 801.2 Biochemistry - 523 Liquid Fuels - 461.8 Biotechnology - 801.1 Chemistry, General
DOI: 10.3969/j.issn.1000-1298.2010.01.021
Database: Compendex
37. Accession number: 20101012752820
Title: Effect of saline water surge flow border irrigation on soil water-salt distribution
Authors: Wu, Zhongdong1 ; Wang, Quanjiu2
Author affiliation: 1 Institute of Resources and Environment Engineering, Shandong University of Technology, Zi'bo 255048, China
2 Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Wang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 53-58
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 field experiment in Nanpi ecological experimental station of Chinese Academy of Sciences, the soil water salt distribution of post-irrigation both on soil profile and along the border was studied. The results showed that, when precipitation rate was the same, the moisture content in 0-100 cm soil layer presented difference between surge flow irrigation and continuous irrigation. The uniformity of water application was compared, and the best irrigation condition was observed when all water supply period were 90 min, which was N=3, r=1/2, and Ton=30 min. Meanwhile the soil moisture content had minimal dispersion degree, and the uniformity of water application was the most satisfactory. The taproot region salt content of continuous irrigation was apparently higher than surge flow irrigation from variation coefficient, which means that the salt distribution dispersion degree of surge flow irrigation was lower than that of continuous irrigation from border initial to border end. Changing irrigation method from continuous irrigation to surge flow irrigation can improve water salt distribution pattern under the condition of same precipitation rate.
Number of references: 17
Main heading: Saline water
Controlled terms: Dispersions - Groundwater - Irrigation - Moisture determination - Permittivity - Precipitation (chemical) - Soil moisture - Soil surveys - Underwater soils - Water content - Water supply
Uncontrolled terms: Border irrigation - Chinese Academy of Sciences - Dispersion degree - Distribution patterns - Experimental stations - Field experiment - Irrigation methods - Moisture contents - Precipitation rates - Salt content - Soil layer - Soil moisture content - Soil profiles - Soil salt content - Soil water - Surge flow irrigation - Variation coefficient
Classification code: 951 Materials Science - 944.2 Moisture Measurements - 821.3 Agricultural Methods - 802.3 Chemical Operations - 801.3 Colloid Chemistry - 708.1 Dielectric Materials - 701 Electricity and Magnetism - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 446.1 Water Supply Systems - 444.2 Groundwater - 444 Water Resources - 406.2 Roads and Streets
DOI: 10.3969/j.issn.1000-1298.2010.01.010
Database: Compendex
38. Accession number: 20101012752817
Title: Semi-physical experiment system and control strategy for bulldozer
Authors: Bai, Han1 ; Guan, Cheng1 ; Wu, Yanlai1
Author affiliation: 1 College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China
Corresponding author: Bai, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 34-40
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 solve the problems in research and development of bulldozer, a semi-physical experiment system is established to simulate the whole process of bulldozer operation. Based on the research results of bulldozer dynamics characteristics, a model is suggested and the theoretical foundation of bulldozer automatic control is built. A loading device is used to simulate the force on the blade-controlled cylinder. The blade position is adjusted by the blade control system according to the control signal from hardware controller. Then the semi-physical experiment is performed through simulation calculations. A fuzzy neural network control method based on variable universe is proposed for engine speed control. And the overall control strategy of bulldozer operation efficiency is studied combined with slip rate control and engine management system. Experimental results show that the engine speed is stable and the working efficiency is improved when using the new control strategy.
Number of references: 9
Main heading: Experiments
Controlled terms: Automation - Control - Controllers - Fuzzy neural networks - Loading
Uncontrolled terms: Automatic control - Blade control - Control signal - Control strategies - Control strategy - Dynamics characteristic - Engine management systems - Engine speed - Engine speed control - Experiment equipment - Fuzzy neural network control - Loading devices - Operation efficiencies - Physical experiments - Physical variables - Research and development - Research results - Simulation calculation - Slip rates - Theoretical foundations - Variable universe - Whole process - Working efficiency
Classification code: 732.1 Control Equipment - 732 Control Devices - 731 Automatic Control Principles and Applications - 901.3 Engineering Research - 723.4 Artificial Intelligence - 672 Naval Vessels - 663.1 Heavy Duty Motor Vehicles - 691.2 Materials Handling Methods
DOI: 10.3969/j.issn.1000-1298.2010.01.007
Database: Compendex
39. Accession number: 20101012752825
Title: Development of a coplanar electrode capacitance moisture sensor
Authors: Yang, Liu1, 2 ; Yang, Minghao2 ; Dong, Lanlan1
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: Yang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 77-80
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: A coplanar electrode capacitance online moisture sensor was developed, which has higher precision, more compact configuration and easier installation compared with traditional parallel electrodes and cylindrical moisture sensors. An active shield electrode was invented to block the outside electric field, thus the stray capacitance was decreased and the precision and sensitivity of the sensor was increased according to finite element analysis. A comparative circuit was used to avoid the influence of shield electrode on drive electrode. Experiments were conducted on grains with 6%~36% moisture content on a custom-built equipment. The relationships between sensor output frequency and grain moisture content were investigated for each temperature condition and the result was compiled into software to realize temperature compensation which decreased the error from 5% to 1%. Experimental validation proved that the sensor had a small measuring error of 1% and was applicable to moisture content range of 6%~36% and temperature range of -10~80°C.
Number of references: 7
Main heading: Moisture control
Controlled terms: Capacitance - Dewatering - Electric fields - Error compensation - Moisture determination - Moisture meters - Sensors
Uncontrolled terms: Active shields - Capacitance sensor - Capacitance sensors - Co-planar electrodes - Experimental validations - Finite element analysis - Grain moisture content - Measuring errors - Moisture contents - Moisture sensors - Parallel electrodes - Sensor output - Shield electrodes - Stray capacitances - Temperature compensation - Temperature conditions - Temperature range
Classification code: 944.2 Moisture Measurements - 944.1 Moisture Measuring Instruments - 802.3 Chemical Operations - 801 Chemistry - 732.2 Control Instrumentation - 731.3 Specific Variables Control - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 703.1 Electric Networks - 701.1 Electricity: Basic Concepts and Phenomena
DOI: 10.3969/j.issn.1000-1298.2010.01.015
Database: Compendex
40. Accession number: 20101012752826
Title: Optimization of gravity tree-type pipe network based on dual coding genetic algorithm and graph theory
Authors: Yang, Jianjun1, 2 ; Ding, Yucheng1 ; Zhao, Wanhua1
Author affiliation: 1 State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2 School of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, China
Corresponding author: Yang, 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: 1
Issue date: January 2010
Publication year: 2010
Pages: 81-85
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An optimization model for gravity tree-type pipe network is established, in which the minimal investment is taken as the objective function, and the pressure, flow rate and pipe diameter are taken as the constraint conditions. The improved genetic algorithm is used to solve the problem. Based on the optimal features of tree-type pipe network, the dual coding combining binary coding with integer coding is adopted in the genetic algorithm to optimize the pipe layout and pipe diameter simultaneously. Based on characteristics of tree in the graph theory, the cycle method is adopted to improve cross method in the operations of initial solution creating and mutation so that the number of infeasible solutions is reduced. Some operational processes of genetic algorithm are improved. The simulated annealing algorithm is introduced in the model. The fitness function is adjusted, and the computing methods of crossover rate and mutation rate are improved. Example shows that the algorithm is efficient.
Number of references: 11
Main heading: Simulated annealing
Controlled terms: Function evaluation - Genetic algorithms - Graph theory – Piping systems
Uncontrolled terms: Binary coding - Computing methods - Constraint conditions - Crossover rates - Dual coding - Fitness functions - Improved genetic algorithms - Initial solution - Integer coding - Mutation rates - Objective functions - Operational process - Optimization models - Pipe diameter - Pipe networks - Simulated annealing algorithms
Classification code: 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 619.1 Pipe, Piping and Pipelines - 537.1 Heat Treatment Processes - 402 Buildings and Towers
DOI: 10.3969/j.issn.1000-1298.2010.01.016
Database: Compendex
41. Accession number: 20101012752852
Title: Experiments on cutting of SiC whisker reinforced aluminum composite with self-propelled rotary tools
Authors: Wang, Dazhen1 ; Feng, Peifeng1 ; Li, Bo1 ; Liu, Huaming2
Author affiliation: 1 College of Mechanical Engineering, Jimei University, Xiamen 361021, China
2 College of Mechanical and Electronic Engineering, Harbin Institute of Technology, Harbin 150001, China
Corresponding author: Feng, P. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 1
Issue date: January 2010
Publication year: 2010
Pages: 221-225 210
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: Different types of cutting tools were used to cut SiC whisker reinforced aluminum composite. And then the 3-D components of cutting forces Fc, Fp, and Ff were measured with a Kistler 3-D dynamometer, and the microscopic pattern and profiles of the cutting edges and the machined surfaces were examined with an atomic force microscope (AFM). The results showed that, compared with fixed circular cutters the self-propelled rotary carbide tools had superior wear-resistance property similar to that of diamond tools. The tool life had increased more than 60 times with stable cut-in and cut-out and less oscillation in the cutting process. The machined surfaces showed high quality, gray metal shine of the aluminum matrix, smaller surface roughness, and less broken SiC whiskers and pits. The 3-D cutting force components Fc, Fp, and Ff were reduced to some degree. The average radial thrust cutting force Fp had a significant reduction of 30%~60%. The self-propelled rotary carbide tools were thought to be one kind of tools with low cost and high cutting performance and a suitable tool in machining the composites reinforced with SiC whiskers of moderate or lower volume fractions.
Number of references: 8
Main heading: Cutting tools
Controlled terms: Aluminum - Carbide cutting tools - Crystal whiskers - Silicon carbide - Surface roughness - Three dimensional - Wear resistance
Uncontrolled terms: Aluminum matrix - Aluminum matrix composites - Atomic force microscopes - Cut-out - Cutting edges - Cutting forces - Cutting performance - Cutting process - Diamond tool - High quality - Kistler - Low costs - Machined surface - Microscopic patterns - Radial thrust - Reinforced aluminum composites - Rotary tools - SiC whisker - Tool life
Classification code: 933.1.1 Crystal Lattice - 723.5 Computer Applications - 801.4 Physical Chemistry - 804.2 Inorganic Compounds - 812.2 Refractories - 902.1 Engineering Graphics - 931.2 Physical Properties of Gases, Liquids and Solids - 605.1 Small Tools, Powered - 604.1 Metal Cutting - 603.2 Machine Tool Accessories - 541.1 Aluminum - 531.2 Metallography - 421 Strength of Building Materials; Mechanical Properties - 605 Small Tools and Hardware
DOI: 10.3969/j.issn.1000-1298.2010.01.042
Database: Compendex
42. Accession number: 20101012752843
Title: Segmentation of pork longissimus dorsi based on KFCM clustering and improved watershed algorithm
Authors: Wu, Xueqian1 ; Liao, Yitao1 ; Fan, Yuxia1 ; Cheng, Fang1
Author affiliation: 1 College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author: Cheng, F. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 1
Issue date: January 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: A method for automatic segmentation of pork longissimus dorsi muscle (MLD) region from rib-eye image was developed using KFCM clustering and improved watershed algorithm. Firstly, median filter and OTSU were used to remove noise and background. And then, kernel fuzzy C-means clustering (KFCM) was applied to remove fat pixels. Finally, hole filling operation and improved watershed algorithm were employed to segment the area of MLD. Sixty samples were used to test the performance of the proposed method. The success rate of segmentation was 86.67%. Compared with the traditional morphology and watershed methods, it is proved that the developed method could segment MLD region perfectly and avoid under-segmentation effectively.
Number of references: 15
Main heading: Clustering algorithms
Controlled terms: Digital image storage - Fuzzy clustering - Fuzzy systems - Image segmentation - Landforms - Meats - Watersheds
Uncontrolled terms: Fuzzy C means clustering - Longissimus - Nondestructive detection - Pork - Water-shed algorithm
Classification code: 731.1 Control Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 822.3 Food Products - 903.1 Information Sources and Analysis - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 961 Systems Science - 723.4 Artificial Intelligence - 444.1 Surface Water - 481.1 Geology - 721 Computer Circuits and Logic Elements - 722.1 Data Storage, Equipment and Techniques - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing
DOI: 10.3969/j.issn.1000-1298.2010.01.033
Database: Compendex
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