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2010年第41卷第5期共收录45篇
1. Accession number: 20102513030612
Title: Trimming algorithm in trimming springback simulation of thin sheet forming
Authors: Zhou, Ping1 ; Guo, Wei2 ; Zhang, Xiangkui3 ; Hu, Ping3
Author affiliation: 1 College of Automotive Engineering, Jilin University, Changchun 130025, China
2 College of Material Science and Engineering, Jilin University, Changchun 130025, China
3 State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
Corresponding author: Hu, P. (pinghu@dlut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 222-226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to assure the accuracy of trimming springback of multi-step forming by finite element method, a trimming algorithm based on self-adaptive template of trimmed elements was proposed. In this algorithm, the intersection calculation between 3-D trimming lines and mesh of part was executed at first. Then the accepting and rejecting judgement of elements was achieved. Finally, the method of trimming element by element along the path of the section lines was used in trimming operation. Therefore, the problems of boundary serration, axial symmetry and boundary gap have been totally avoided, and multi-trimming on refined mesh was achieved to improve the efficiency of trimming operation. The present algorithm has been integrated into the independently developed KMAS forming analysis system. By using the numerical simulation on automotive underbody cross member which was provided by benchmark test of NUMISHEET 2005, the applicability and reliability of introduced algorithm were verified.
Number of references: 7
Main heading: Trimming
Controlled terms: Algorithms - Computer simulation - Finite element method - Mathematical models - Stamping
Uncontrolled terms: Axial symmetry - Benchmark tests - Element by elements - Forming analysis - Multi-step - Numerical simulation - Self-adaptive - Spring-back - Thin sheet - Trimming line
Classification code: 535.1.2 Rolling Mill Practice - 535.2 Metal Forming - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.05.045
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 2. Accession number: 20102513030596
Title: GPS positioning error analysis and outlier elimination method in forestry
Authors: Zhang, Huichun1, 2 ; Zheng, Jiaqiang1 ; Zhou, Hongping1
Author affiliation: 1 College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
2 Faculty of Natural Resources, Agriculture and Veterinary Science, The University of Queensland, Queensland 4343, Australia
Corresponding author: Zhang, H. (njzhanghc@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 143-147
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: Position accuracy is one of the most important parameters of GPS. Differential GPS(DGPS) can get higher position accuracy significantly, but there are many limitations for its applying ranges, so improving the accuracy by independent positioning method has important significance. Experiments in the non-differential mode by using Trimble AgGPS132 were conducted. First, the frequency distribution of the experimental data was analyzed. A method to eliminate outliers was raised, and GPS precision operating was compared before and after eliminating outliers. Finally, how to eliminate the influence of error was pointed out according to the different conditions. The results showed that adopting the Levin special criteria to eliminate outliers could improve the positioning accuracy effectively, and adding control point could correct the drift data of GPS dynamic positioning.
Number of references: 7
Main heading: Global positioning system
Controlled terms: Error analysis - Forestry - Timber
Uncontrolled terms: Before and after - Control point - Differential GPS - Differential mode - Drift data - Experimental data - Frequency distributions - GPS positioning - Outlier elimination - Position accuracy - Positioning accuracy - Positioning error - Positioning methods
Classification code: 943.3 Special Purpose Instruments - 921.6 Numerical Methods - 821.0 Woodlands and Forestry - 811.2 Wood and Wood Products - 716.3 Radio Systems and Equipment - 655.2.1 Communication Satellites - 415.3 Wood Structural Materials
DOI: 10.3969/j.issn.1000-1298.2010.05.029
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
3. Accession number: 20102513030587
Title: Optimization of technology for twice moisture conditioning treatment for brown rice
Authors: Jia, Fuguo1 ; Lan, Haipeng1 ; Zuo, Yanjun1 ; Zhou, Yulong1 ; Jiang, Lianzhou2
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
2 College of Food Science, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Jiang, L. (jlzname@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 95-98 151
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 solve the problems of low head rice yield (HRY), high energy consumption and unable to reach the anticipate target after once moisture conditioning treatment (MCT) when milling the stored desiccated low-moisture brown rice, a study on the laws of effects that different amounts of moisture, the temperatures during the rice moisturizing and the time between the two MCT have on HRY during the twice MCT for brown rice was conducted with the materials of brown rice (the moisture content was 12%). Based on the single-factor tests, composite tests of quadratic orthogonal rotation were designed and the experimental data was analyzed with SAS. From the testable experiments, it was proved that HRY increased by 15.42% and the energy consumption decreased by 26.86%. When the moisture increased by 1.56% each time, the temperature was 29.6°C and the time between the two experiments was 64.6 min.
Number of references: 9
Main heading: Moisture
Controlled terms: Experiments - Milling (machining)
Uncontrolled terms: Brown rice - Energy consumption - Experimental data - High energy consumption - Low head - Moisture conditioning - Moisture contents - Quadratic orthogonal rotation
Classification code: 443.1 Atmospheric Properties - 604.2 Machining Operations - 801.4 Physical Chemistry - 901.3 Engineering Research
DOI: 10.3969/j.issn.1000-1298.2010.05.020
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 4. Accession number: 20102513030578
Title: Compensation effects of water stress and re-watering on the function of root shoot
Authors: Hao, Shurong1 ; Guo, Xiangping2 ; Zhang, Zhanyu2 ; Wang, Weimu2
Author affiliation: 1 Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern, Ministry of Education, Hohai University, Nanjing 210098, China
2 College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China
Corresponding author: Hao, S. (srhao@hhu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 52-55
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 research was carried out to determine the compensation effects of water stress and re-watering on the function of root shoot by pot experiments. The results show that the post-drought re-watering has obvious compensation effects to rice on the function of root shoot, which is particularly significant after short-duration heavy drought at the late tillering stage and light drought at the early jointing stage. Post-drought re-watering mainly embodies compensation effects in improving the physiological activity of neonatal crop organ.
Number of references: 7
Main heading: Heavy water
Controlled terms: Drought - Plants (botany)
Uncontrolled terms: Compensation effects - Photosynthetic rate - Physiological activity - Pot experiment - Rice roots - Water stress
Classification code: 443.3 Precipitation - 444 Water Resources - 461.9 Biology - 804 Chemical Products Generally
DOI: 10.3969/j.issn.1000-1298.2010.05.011
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 5. Accession number: 20102513030581
Title: Experimental research on the method to determine the centrifugal pump cavitation monitoring threshold
Authors: Su, Yongsheng1 ; Wang, Yongsheng1 ; Duan, Xiangyang1
Author affiliation: 1 College of Naval Architecture and Marine Power, Naval University of Engineering, Wuhan 430033, China
Corresponding author: Su, Y. (suyongsheng1981@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 68-71
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 determining of cavitation monitoring threshold is the key segment of distinguishing pump running state. A series of tests have been put into effect in a laboratory to simulate the cavitation, the signal of inlet sound pressure and enclosure vibration were acquired at 1440 r/min, flow rate at 90, 100, 110, 120 m3/h. The method to determine the cavitation monitoring threshold which based on statistic theory was posed by making use of reference frequency band energy. The results of cavitation experimental study showed that the inlet pressure sound and enclosure vibration signal of pump were followed uniformity by sound pressure rule at the reference frequency band, the energy value first rose then dropped along with cavity number diminishing; using 3σ principle, the energy curve peak lower limit value was firstly acquired by the experiment, then the value of decreasing 3~5 dB was taken as the reference of cavitation threshold; the reference frequency band energy peak value of sound pressure first rose then dropped along with the increase of flow rate, and its cavitation sensitivity is stronger than the vibration signal.
Number of references: 4
Main heading: Cavitation
Controlled terms: Centrifugal pumps - Enclosures - Frequency bands - Hydraulic machinery - Inlet flow - Pressure effects - Pumping plants - Pumps - Ultrasonics
Uncontrolled terms: Band energy - Cavitation thresholds - Cavity number - Energy curve - Energy value - Experimental research - Experimental studies - Inlet pressures - Key-segment - Lower limit value - Reference frequency - Sound pressures - Statistic theory - Vibration signal
Classification code: 931.1 Mechanics - 914 Safety Engineering - 753.1 Ultrasonic Waves - 716.4 Television Systems and Equipment - 716.3 Radio Systems and Equipment - 632.2 Hydraulic Equipment and Machinery - 631.1.1 Liquid Dynamics - 631.1 Fluid Flow, General - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings
DOI: 10.3969/j.issn.1000-1298.2010.05.014
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 6. Accession number: 20102513030609
Title: Integration of profile for scroll fluid machine based on vector function of orthogonal frame
Authors: Liu, Tao1 ; Rui, Zhiyuan1 ; Wu, Zaixin2 ; Hu, Chibing1
Author affiliation: 1 Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
2 School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author: Liu, T. (liutao1971@lut.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 209-212
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the theory of orthogonal frame, a general equation in form of vector function was established for scroll profile. Engagement condition of meshed profiles was derived. According to the parameter equation of Cartesian coordinate, the function of curvature radius could be expressed by integration of tangential angle. Curvature radius function based on differential equation of profile was deduced. Furthermore, demonstrated by four typical profiles, the corresponding relation among radius of curvature, general generating radius and general basic radius was determined. The differential equation for the involute of a regular triangle was demonstrated in form of function of radius of curvature. The integration profile could not only cover the existed profiles, but also be used to optimize properties of these profiles by controlling coefficients of series of tangential angles. The conclusions could be applied in flexible design of scroll fluid machine.
Number of references: 8
Main heading: Orthogonal functions
Controlled terms: Differential equations - Machine design - Vectors
Uncontrolled terms: Cartesian coordinate - Corresponding relations - Curvature radii - Flexible designs - Fluid machines - General equations - Parameter equations - Radius of curvature - Vector functions
Classification code: 601 Mechanical Design - 921 Mathematics - 921.1 Algebra - 921.2 Calculus
DOI: 10.3969/j.issn.1000-1298.2010.05.042
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 7. Accession number: 20102513030590
Title: Experiment on neural network prediction modeling of far infrared radiation drying for agaricus bisporus
Authors: Lin, Xi'na1 ; Wang, Xiangyou1 ; Ding, Ying1
Author affiliation: 1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author: Wang, X. (wxy@sdut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 110-114
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 factors influenced infrared radiation drying rates for Agaricus bisporus, such as radiation intensity, radiation distance, material temperature, material thickness and drying time were analyzed. The network model structure between moisture content and all the controlling factors was built based on feed-forward neural network, the selected structure of the applied neural network, with its five inputs, single output and 11 hidden neurons were used. All data series obtained from different drying runs were used for training and test, mathematical model responding to inner relationship of the experimental data was obtained by finite iteration calculation, and it was trained and simulated systemically by using Matlab neural network toolbox. It was concluded that the model could be built by the BP neural network, cost-effectively, accurately and rapidly during far infrared drying of Agaricus bisporus within the trial stretch. It was found that the predictions of the artificial neural network model fit the experimental data preferably, and the applications of the artificial neural networks could be used for the online state estimation moisture content with more suitable and accuracy.
Number of references: 11
Main heading: Infrared drying
Controlled terms: Computer simulation - Curing - Forecasting - Infrared radiation - Mathematical models - Moisture control - Moisture determination - Neural networks - Radiometers
Uncontrolled terms: Agaricus bisporus - BP neural network - BP neural networks - Far-infrared - Moisture contents - Prediction model
Classification code: 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 912.2 Management - 921 Mathematics - 922.2 Mathematical Statistics - 944.2 Moisture Measurements - 944.7 Radiation Measuring Instruments - 802.3 Chemical Operations - 461.1 Biomedical Engineering - 642.1 Process Heating - 723.4 Artificial Intelligence - 723.5 Computer Applications - 731.3 Specific Variables Control - 741.1 Light/Optics - 802.2 Chemical Reactions
DOI: 10.3969/j.issn.1000-1298.2010.05.023
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 8. Accession number: 20102513030570
Title: Optimization on dynamic performance of pressure-regulating valve of tractor-brake hydraulic torque converter
Authors: Jin, Yi1, 2 ; Xiang, Changle1 ; Ma, Yue1
Author affiliation: 1 National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
2 Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China
Corresponding author: Xiang, C. (xiangcl@bit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 12-16
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the simulation model of pressure-regulating valve of tractor-brake, a hydraulic torque converter was developed. With Niche genetic algorithms, the optimal result of pressure-regulating valve was obtained. In the process of optimization, the simulation model used Matlab and ITAE was calculated as optimal target value. Finally, dynamic performance was tested in a performance experiment. The results indicated that based on simulation model, the performance of pressure-regulating valve was improved with Niche genetic algorithms and the design process was simplified.
Number of references: 8
Main heading: Computer simulation
Controlled terms: Brakes - Ecology - Genetic algorithms - Hydraulic torque converters - Hydraulics - Optimization - Torque - Tractors (truck)
Uncontrolled terms: Design process - Dynamic performance - Niche genetic algorithm - Niche genetic algorithms - ON dynamics - Optimal results - Optimal target - Performance experiment - Simulation model
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 921 Mathematics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 663.1 Heavy Duty Motor Vehicles - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 602 Mechanical Drives and Transmissions - 454.3 Ecology and Ecosystems - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.05.003
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 9. Accession number: 20102513030579
Title: Optimization design of deep well pump based on latin square test
Authors: Wang, Hongliang1 ; Shi, Weidong1 ; Lu, Weigang1 ; Zhou, Ling1 ; Wang, Chuan1
Author affiliation: 1 Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Shi, W. (wdshi@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 56-63
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 L18(37) orthogonal experiment was designed with seven factors and three values including blades numbers, outlet angle, outlet width, etc. 18 impellers were designed totally. The two stages of whole flow field on deep well pump in the operating point for design was simulated by using CFD. The 18 groups of the design scheme for efficiency and head were obtained. Using Latin square test, the effect of geometrical parameters on efficiency and head were researched. The primary and secondary sequence of the design parameters were acquired by the method of variance analysis. According to the test result and optimization design with experimental research, an optimum program to further design was put forward. The result could be instructive to the design of the deep well pump, which was designed by the impeller head maximum approach.
Number of references: 8
Main heading: Well pumps
Controlled terms: Blowers - Computational fluid dynamics - Deep oil well drilling - Design - Optimization - Testing
Uncontrolled terms: Deep well pump - Design parameters - Design scheme - Experimental research - Geometrical parameters - Latin square - Operating points - Optimization design - Optimum program - Orthogonal experiment - Outlet angle - Test optimization - Test results - Two stage - Variance analysis
Classification code: 618.3 Blowers and Fans - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 931.1 Mechanics - 723.5 Computer Applications - 921.5 Optimization Techniques - 921.6 Numerical Methods - 902.1 Engineering Graphics - 618.2 Pumps - 512.2.2 Development Operations - 408 Structural Design - 422.2 Test Methods - 423.2 Test Methods - 446.1 Water Supply Systems - 511.1 Oil Field Production Operations - 512.1.2 Development Operations
DOI: 10.3969/j.issn.1000-1298.2010.05.012
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 10. Accession number: 20102513030606
Title: Experiment on porous media combustor of micro-thermophotovoltaic system
Authors: Pan, Jianfeng1 ; Zhang, Huifeng1 ; Tang, Aikun1 ; Li, Detao1 ; Ding, Jianning2 ; Xue, Hong3
Author affiliation: 1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
2 Micro Nano Research Center, Jiangsu University, Zhenjiang 212013, China
3 School of Mechanical Engineering, California Polytechnic State University, Los Angeles CA91768, United States
Corresponding author: Pan, J. (mike@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 193-197
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To improve the efficiency of the micro-thermophotovoltaic system, the radiation energy output of micro-combustor has to be uniform and possibly in the short-wave photon energy range, which requires high and uniform temperature along the micro-combustor's external wall. In order to further optimize the micro-combustor, different porous media combustors with the inner and external diameters of 2.4 mm and 3.0 mm were designed. After stable combustion of hydrogen and oxygen in the porous media combustors, experimental investigation was carried out against micro-combustor with different hydrogen-oxygen volume ratios, mixing gas flux and porosity, the combustion performance and external wall temperature distribution under different conditions were analyzed. The results indicated that the porosity, mixing gas flux and hydrogen-oxygen volume mixing ratio had significant effect on the mixture combustion in micro-combustor. When the porosity, mixing gas flux and hydrogen-oxygen volume mixing ratio were separately 0.50, 750 cm3/min and 2:1, the micro-combustor showed a better combustion performance, including high and uniform temperature distribution along the external wall of micro-combustor, which was suitable for application to micro-thermophotovoltaic system.
Number of references: 9
Main heading: Combustors
Controlled terms: Combustion - Experiments - Hydrogen - Mixing - Oxygen - Porosity - Porous materials - Temperature distribution - Thermoanalysis
Uncontrolled terms: Combustion performance - Experimental investigations - External walls - Micro-thermophotovoltaic - Mixing gas - Oxygen volume - Photon energy range - Porous Media - Radiation energy - Short waves - Uniform temperature - Wall temperature - Wall temperatures
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 804 Chemical Products Generally - 802.3 Chemical Operations - 951 Materials Science - 802.1 Chemical Plants and Equipment - 641.1 Thermodynamics - 521.2 Combustors - 521.1 Fuel Combustion - 801 Chemistry
DOI: 10.3969/j.issn.1000-1298.2010.05.039
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 11. Accession number: 20102513030611
Title: BMF based micro-flux pneumatic servo valve
Authors: E, Shiju1 ; Gao, Chunfu1 ; Xu, Xianrong2
Author affiliation: 1 College of Mechanical Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
2 Institute of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: E, S. (esx_2001@zjnu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 218-221 217
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: Utilizing a new type shape memory alloy(SMA)-biometal fiberR(BMF) as the convertor from electrical energy to mechanical energy, a pneumatic micro-servo valve was developed. Input-output characteristics of BMF100, including displacement output and load output were investigated by the experiments. The voltage hysteresis of BMF100 was 0.2 V at 0.1 N load and 10 V maximum driving voltage, and the value was 0.4 V at 1.0 N load and 11 V maximum driving voltage. 3-D model of servo valve was simulated by the software of CATIA. As an important part, the allowable stress and strain of coniform core of valve was studied by the numerical simulation of finite element method with software of ANSYS. Response time of pressure output of the valve was 0.3 s. The result shows that it is feasible to use BMF as the convertor from electrical energy to mechanical energy of pneumatic servo micro-valve.
Number of references: 8
Main heading: Valves (mechanical)
Controlled terms: Actuators - Computer software - Experiments - Finite element method - Pneumatic servomechanisms - Pneumatics - Three dimensional
Uncontrolled terms: 3D models - Allowable stress - Bio-metal - Displacement output - Driving voltages - Electrical energy - Input-output characteristics - Mechanical energies - Micro valves - Numerical simulation - Pneumatic servo valves - Response time - Servo-valve - Shape memory alloy - Voltage hysteresis
Classification code: 921.6 Numerical Methods - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 731.2 Control System Applications - 732.1 Control Equipment - 901.3 Engineering Research - 902.1 Engineering Graphics - 632.4 Pneumatic Equipment and Machinery - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics - 619.2.1 Tank Accessories - 619.1.1 Pipe Accessories - 602.1 Mechanical Drives - 601.2 Machine Components - 632.3 Pneumatics
DOI: 10.3969/j.issn.1000-1298.2010.05.044
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 12. Accession number: 20102513030582
Title: Research and motion simulation analysis of the rotor profile on the inside circulation piston pump
Authors: Zhou, Jia1 ; Deng, Hongying1 ; Zhang, Huajun2 ; Zhang, Shengchang1 ; Zheng, Shuihua1 ; Li, Haishan3
Author affiliation: 1 College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
2 Hangzhou Special Equipment Inspection Institute, Hangzhou 310000, China
3 Shijiazhuang Kingda Pump Industry Group Co., Ltd., Shijiazhuang 050035, China
Corresponding author: Zhou, J. (zhouyix8@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 72-75
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 tooth profile lines of the inside circulation piston pump were studied, and their meshing characteristics were analyzed. According to the motion law of the inside circulation piston pump rotor, and based on the tooth profile lines of the inside rotor as the circular arc, the moving coordinate system was established. Assumed that the outside rotor was fixed and the inside rotor made the relative movement, the calculation formula of the outside rotor profile was deduced for the first time. At last, using an actual design example and motion simulation analysis, the validity of the tooth profile line equation and calculation formula was verified.
Number of references: 10
Main heading: Reciprocating pumps
Controlled terms: Dentistry - Design - Equations of motion
Uncontrolled terms: Calculation formula - Circular arc - Meshing characteristics - Motion law - Motion simulations - Moving coordinate system - Piston pump - Relative movement - Rotor profile - Rotor profiles - Tooth profile
Classification code: 921.2 Calculus - 902.1 Engineering Graphics - 618.2 Pumps - 931.1 Mechanics - 462.3 Dental Equipment and Supplies - 461.1 Biomedical Engineering - 408 Structural Design - 461.6 Medicine and Pharmacology
DOI: 10.3969/j.issn.1000-1298.2010.05.015
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 13. Accession number: 20102513030610
Title: Trajectory optimization of spray painting robot based on CAD
Authors: Li, Fazhong1 ; Zhao, Dean1 ; Zhang, Chao1 ; Ji, Wei1
Author affiliation: 1 School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Li, F. (andy007@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 213-217
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: Due to the complex geometry of free-form surfaces, the generating optimization trajectories of spray gun satisfy the requirement of uniformity paint became a challenge. A quadratic function of the paint deposition rate on a plane was proposed according to the experimental data, and a model of paint deposition rate on a free-form surface was established. The point cloud model was obtained directly by scanning the surface of workpiece, and the position and pose of spray gun was obtained by point cloud slicing technique. The change of the surface curvature caused non-uniform paint deposition on freeform surface. An algorithm of variable spray speed optimization was established to compensate for the curvature change and improve the uniformity of paint deposition along passes. An algorithm for selecting the spacing between the passes was established to improve the deposition uniformity vertical to passes, and to reduce cycle time and paint waste. Finally, the simulation and experimental results illustrated the feasibility and availability of these optimization algorithms.
Number of references: 11
Main heading: Curve fitting
Controlled terms: Aerodynamics - Algorithms - Deposition rates - Optimization - Paint - Robots - Spray guns - Surface measurement - Trajectories
Uncontrolled terms: A-plane - Complex geometries - Cycle time - Experimental data - Free-form surface - Nonuniform - Optimization algorithms - Point cloud - Quadratic function - Robot trajectory - Speed optimization - Spray painting - Surface curvatures - Trajectory optimization - Variable spray - Work pieces
Classification code: 731.6 Robot Applications - 813.1 Coating Techniques - 813.2 Coating Materials - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.5 Optimization Techniques - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements - 731.5 Robotics - 404.1 Military Engineering - 539.1 Metals Corrosion - 539.2.2 Protecting Materials - 617 Turbines and Steam Turbines - 621.1 Fission Reactors - 651.1 Aerodynamics, General - 654.1 Rockets and Missiles - 655.2 Satellites - 723 Computer Software, Data Handling and Applications
DOI: 10.3969/j.issn.1000-1298.2010.05.043
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 14. Accession number: 20102513030602
Title: Prediction of chlorophyll content of winter wheat using leaf-level hyperspectral data
Authors: Wang, Wei1 ; Peng, Yankun1 ; Ma, Wei2 ; Huang, Hui1 ; Wang, Xiu2
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author: Wang, W. (playerwxw@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 172-177
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 leaf-level winter wheat hyperspectral response to its chlorophyll content was examined. Firstly, after the 316 scan line images were acquired, the cube image data was constructed and the region of interest (ROI) was selected, then after the average pixel intensity acquired, using correlation analysis combined with stepwise discrimination method for the origin reflective spectrum and the first derivative spectrum, the optimal wavelengths were selected respectively; the chlorophyll content model using multivariate linear regression (MLR) was constructed based on the above seven optimal wavelengths. After statistical significance testing, three wavelengths were abandoned, and the residual four wavelengths, i.e., 710.85, 767.42, 650 and 520 nm were used to construct chlorophyll content prediction model. The prediction results showed that the determination coefficient were R2=0.8434 and R2=0.7093 for the training dataset and the validation dataset respectively. All of these indicated that with the hyperspectral technology, chlorophyll content of winter wheat could be predicted precisely.
Number of references: 13
Main heading: Porphyrins
Controlled terms: Chlorophyll - Forecasting - Linear regression - Mathematical models - Optimization
Uncontrolled terms: Chlorophyll contents - Correlation analysis - Data sets - Determination coefficients - First derivative - Hyper-spectral images - HyperSpectral - Hyperspectral Data - Image data - Multivariate linear regressions - Optimal wavelength - Pixel intensities - Prediction model - Reflective spectrum - Region of interest - Scan line - Statistical significance - Three-wavelengths - Training dataset - Winter wheat
Classification code: 801.2 Biochemistry - 804.1 Organic Compounds - 912.2 Management - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI: 10.3969/j.issn.1000-1298.2010.05.035
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
15. Accession number: 20102513030589
Title: Kinetics modeling of vacuum far-infrared radiation drying on honeysuckle
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. (beckybin@mail.haust.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 105-109 125
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The influence of the temperature of the radiation heater, pressure in the chamber and sample mass on the drying characteristics of vacuum far-infrared radiation drying on honeysuckle was studied by using a self-transformed dryer. By means of linearization of moisture ratio curves, the kinetics model equation was determined as MR=exp(-Ktn). Quadratic orthogonal regression was employed to fit the relationship between modeling coefficients (n and K) and drying parameters. The results showed that the calculated values of mathematical model were quite suitable for the experimental data, and the model could illustrate moisture ratio changing regulation of vacuum far-infrared radiation drying on honeysuckle very well.
Number of references: 16
Main heading: Infrared drying
Controlled terms: Curing - Infrared radiation - Mathematical models - Moisture - Radiation - Radiometers - Vacuum
Uncontrolled terms: Calculated values - Drying characteristics - Drying parameters - Experimental data - Far-infrared radiation - Kinetics modeling - Kinetics models - Moisture ratios - Orthogonal regression - Vacuum drying
Classification code: 944.7 Radiation Measuring Instruments - 921 Mathematics - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 741.1 Light/Optics - 711 Electromagnetic Waves - 657.1 Solar Energy and Phenomena - 642.1 Process Heating - 633 Vacuum Technology - 443.1 Atmospheric Properties
DOI: 10.3969/j.issn.1000-1298.2010.05.022
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 16. Accession number: 20102513030586
Title: Optimizing process to manufacture the special flour for instant wet noodle by flows recombination on producing line
Authors: An, Hongzhou1, 2 ; Chen, Fusheng1 ; Xue, Wentong2 ; Guo, Zhenxiang1 ; Li, Panxin3
Author affiliation: 1 College of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China
2 College of Food Science and Nutrition Engineering, China Agricultural University, Beijing 100083, China
3 Henan Nanjiecun Group Ltd., Linying 462600, China
Corresponding author: Xue, W. (xwt315@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 90-94
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 qualities of every flow flours were analyzed by physicochemical properties analysis, noodle making and sensory evaluation. The noodle qualities made of different flows were also evaluated by using principal component analysis method, Z values of noodle made by 23 flows were between -15.462 and 34.546. The test graded and recombined those flows according to the principle component analysis, change of noodles taste was remarkable and noodles break and tension force were in the second place among noodle quality differences. The recombination result indicated that the sensory evaluation value of noodle made of No.1 flour exceeded that of noodle made of high quality wheat flour, but the noodle lacked break and tension force.
Number of references: 8
Main heading: Principal component analysis
Controlled terms: Optimization - Process control
Uncontrolled terms: High quality - Physicochemical property - Principal component analysis method - Principal Components - Principle component analysis - Sensory evaluation - Tension force - Wheat flours - Z value
Classification code: 731 Automatic Control Principles and Applications - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI: 10.3969/j.issn.1000-1298.2010.05.019
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 17. Accession number: 20102513030571
Title: Multidisciplinary design optimization for automobile disk brake based on iSIGHT
Authors: Hu, Wenjie1 ; Chen, Liang1
Author affiliation: 1 College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350002, China
Corresponding author: Chen, L. (clfj2005@tom.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 17-20
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: With comprehensive consideration of the structure, kinematics, thermodynamics problems of the automotive disc brake, a time model of brake disk in Matlab, a structure model and a temperature field model of brake disk in ANSYS were built, and the multidisciplinary optimization analysis and design could be made by numerical analysis and calculation. Integrating iSIGHT with Matlab and ANSYS, the platform and simulation processes of multidisciplinary design optimization (MDO) of the disk brake were constructed. In order to achieve the parameters extraction, export and update as well as the data exchanges between the software, the customized development of the software has been made. The result from the platform test demonstrated that the braking effect was improved, the braking time was shortened and the weight of the brake was reduced.
Number of references: 9
Main heading: Brakes
Controlled terms: Combinatorial optimization - Computer software - Design - Disks (structural components) - Numerical analysis - Vehicles
Uncontrolled terms: Automotive disc - Brake disks - Braking effect - Data exchange - Disk brakes - ISIGHT - Multi-disciplinary optimizations - Multidisciplinary Design Optimization - Parameters extraction - Simulation process - Structure models - Temperature field model - Time model
Classification code: 921.6 Numerical Methods - 921.5 Optimization Techniques - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 902.1 Engineering Graphics - 723 Computer Software, Data Handling and Applications - 602 Mechanical Drives and Transmissions - 432 Highway Transportation - 408.2 Structural Members and Shapes - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.05.004
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 18. Accession number: 20102513030574
Title: Robust optimal design of an engine mounting system based on particle swarm optimization
Authors: Zhang, Wu1, 2 ; Chen, Jian1, 3 ; Gao, Yu1
Author affiliation: 1 Institute of Sound and Vibration Research, Hefei University of Technology, Hefei 230009, China
2 College of Information and Computer Science, Anhui Agricultural University, Hefei 230036, China
3 Anhui Key Laboratory of Vehicle NVH and Reliability, Hefei 230009, China
Corresponding author: Zhang, W. (zhangwu@ahau.edu.c)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 30-35 81
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The result of design was affected by the variation of parameters, and the model of robust optimal design was established with the robust optimal design theory. Considering the variation in the mean value and variance of objective function and constraint function, the optimization model was built, which took decoupling of energy distribution as an objective, and stiffness parameters of mountings as a design variation. Particle swarm optimization (PSO) was adopted to optimize an engine mounting system to the stiffness of mountings, and the Monte Carlo method was used to analyze the optimization values. An example showed the method presented could decrease the sensitivity of decoupling with respect to the stiffness of mountings, and could make the vibration coupling distribution more reasonable. Comparing with the genetic algorithms, the optimization design computational efficiency of engine mounting system could be obtained quickly by PSO.
Number of references: 15
Main heading: Engine mountings
Controlled terms: Computational efficiency - Design - Engines - Fuzzy control - Monte Carlo methods - Optimal systems - Particle swarm optimization (PSO) - Stiffness
Uncontrolled terms: Constraint functions - Design variations - Energy decoupling - Energy distributions - Mean values - Objective functions - Optimization design - Optimization models - Optimization value - Particle swarm - Robust Optimal Design - Stiffness parameters - Variation of Parameters - Vibration coupling
Classification code: 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 902.1 Engineering Graphics - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 951 Materials Science - 961 Systems Science - 723.1 Computer Programming - 408 Structural Design - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 612 Engines - 617.3 Steam Engines - 653.2 Aircraft Engine Components - 654.2 Rocket Engines - 661.2 Automotive Engine Components - 723 Computer Software, Data Handling and Applications
DOI: 10.3969/j.issn.1000-1298.2010.05.007
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 19. Accession number: 20102513030598
Title: Design and experiments of vision sensor for harvest robots in field
Authors: Li, Li1, 2 ; Yin, Guofu1 ; Liu, Keqi2
Author affiliation: 1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China
2 School of Computer Science and Technology, Southwest Science and Technology University, Mianyang 621010, China
Corresponding author: Yin, G. (ying821201@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 152-157 136
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 demand of recognition and location in computer vision for harvest robots, the embedded vision sensor plat was designed which contained 1.3 million pixel CMOS image chip, MCU with open structure, and brightness-adapting module controlled by the expert database to solve the problem of outdoor light changing which affected the visual inspection. Two sensors were used to construct binocular vision sensor system which was coordinated by master-slave frame. The algorithm of image segmentation and distance measurement was applied to get the location data of harvesting object. The binocular vision sensor system ran smoothly and reliably. The performance test results showed that the success ratio of identifying is 96% and the measure error is within ±12mm when the system took ripe tomato as an measuring object and the measure distance limits was in machine pick-arm range.
Number of references: 15
Main heading: Sensors
Controlled terms: Binocular vision - Binoculars - Computer control systems - Computer vision - Harvesting - Image segmentation - Machine design - Military photography - Optical instruments - Robots - Vegetables - Visual communication
Uncontrolled terms: Harvest robots - Target recognition - Target recognition positioning - Vision sensors
Classification code: 941.3 Optical Instruments - 732.2 Control Instrumentation - 741.1 Light/Optics - 741.2 Vision - 741.3 Optical Devices and Systems - 742.1 Photography - 801 Chemistry - 821.3 Agricultural Methods - 821.4 Agricultural Products - 731.6 Robot Applications - 404.1 Military Engineering - 601 Mechanical Design - 716.4 Television Systems and Equipment - 731.5 Robotics - 717.1 Optical Communication Systems - 723.5 Computer Applications - 731.1 Control Systems - 723.2 Data Processing and Image Processing
DOI: 10.3969/j.issn.1000-1298.2010.05.031
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 20. Accession number: 20102513030577
Title: Effect of drip irrigation model and irrigation start point on water consumption and yield of sweet melon
Authors: Wang, Hongyuan1 ; Li, Guangyong1
Author affiliation: 1 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, G. (lgyl@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 47-51
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 field experiment was conducted to investigate the effect of irrigation models (drip irrigation under plastic mulching (MDI), drip irrigation (DI) and subsurface drip irrigation (SDI)) and irrigation start point on water consumption and yield of sweet melon. The results showed that under the same irrigation start point: MDI increased the yield by 16.0% compared with DI; MDI increased the yield by 7.5% compared with SDI; SDI increased the yield by 7.9% compared with DI. The average water consumption for MDI, SDI and DI were 193.0 mm, 217.3 mm, 239.3 mm respectively. Under the same drip irrigation model, the treatment of irrigation start point of 60% field capacity in extension vine and flowering fruit stage, yield increased by 21.0% compared with the treatment of 40% field capacity; the treatment of irrigation start point of 80% field capacity in fruitage stage, yield increased by 9.3% compared with the treatment of 70% field capacity. The appropriate irrigation start points (the percentage of field capacity) for the sweet melon were: seedling stage (65%), extension vine and flowering fruit stage (60%), fruitage stage (80%), mature stage (55%).
Number of references: 10
Main heading: Water recycling
Controlled terms: Subirrigation - Water supply
Uncontrolled terms: Drip irrigation - Drip irrigation model - Field capacity - Field experiment - Plastic mulching - Start point - Subsurface drip irrigation - Sweet melon - Water consumption
Classification code: 444 Water Resources - 445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 453.2 Water Pollution Control - 821.3 Agricultural Methods
DOI: 10.3969/j.issn.1000-1298.2010.05.010
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 21. Accession number: 20102513030576
Title: Research on analytic model of furrow irrigation water movement based on water balance method
Authors: Nie, Weibo1 ; Ma, Xiaoyi2 ; Fei, Liangjun1
Author affiliation: 1 Institute of Water Resources, Xi'an University of Technology, Xi'an 710048, China
2 Key Laboratory for Agricultural Soil and Water Engineering in Arid Area, Ministry of Education, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Ma, X. (xiaoyimasl@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 42-46
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In the traditional water movement model of the furrow irrigation based on water balance method, it is necessary to determine the value of the figure coefficient of infiltration water (σz) before simulating water flow of the furrow irrigation, which affected the precision of the model. The relationship between the figure coefficient of infiltration water and water flow under furrow irrigation was analyzed, an analytic model of furrow irrigation on the basis of water balance method was set up, and the iterative algorithm to the analytic model was determined. The influence of different σs values in 0.70~0.80 on the model compute results was studied, the model results were verified with some research results and field experimental values. The results showed that the problem of getting σz directly with difficulty was solved and the accuracy of the model was improved. It is also found that different σs values in 0.70~0.80 has little influence on the model compute results and when the σs value is 0.75, it has better accuracy for the model than that when the σs value is 0.70 or 0.80. The study indicated that the analytic model has some advantages, such as simple calculation method and solution, high accuracy.
Number of references: 20
Main heading: Irrigation
Controlled terms: Algorithms - Climate models - Flow of water - Hydraulics - Seepage - Soil mechanics - Water supply
Uncontrolled terms: Analytic models - Analytic solution - Experimental values - Figure coefficient of infiltration water - Furrow irrigation - Iterative algorithm - Model results - Research results - Simple calculation method - Surface storage - Water balance method - Water flows - Water movements
Classification code: 821.3 Agricultural Methods - 723 Computer Software, Data Handling and Applications - 632.1 Hydraulics - 631.1.1 Liquid Dynamics - 921 Mathematics - 483.1 Soils and Soil Mechanics - 443 Meteorology - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways - 446.1 Water Supply Systems
DOI: 10.3969/j.issn.1000-1298.2010.05.009
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 22. Accession number: 20102513030607
Title: Investigation of electrostatic micropump pull-in phenomena based on mode superposition method
Authors: Ying, Ji1 ; Li, Jun1 ; Lin, Xiezhao1 ; Xu, Liang1
Author affiliation: 1 Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Corresponding author: Ying, J. (yingji_zju@yahoo.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 198-203
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Electrostatically actuated circular diaphragm exhibits an instability known as pull-in phenomena, short circuit caused by pull-in with contact is destructive to electrostatic micropump operation. In order to avoid pull-in instability caused by high driving voltage, pull-in voltage should be calculated accurately. Therefore a reduced order model (ROM) based on numerical calculation and mode superposition method was constructed, which could take account of residual stress and geometric nonlinearity. The pull-in voltage and pull-in position computed by ROM have been compared with the existed results and the results calculated by 3-D finite element analysis. It showed that the ROM sped up computational process without sacrificing the accuracy. The effects of different parameters such as residual stress, initial gap, diaphragm radius, diaphragm thickness on pull-in voltage and pull-in position were also investigated by the ROM. In addition, the design criteria of pump diaphragm were obtained, which provided an effective theoretical basis for the optimization design of electrostatic micropump.
Number of references: 8
Main heading: Finite element method
Controlled terms: Diaphragms - Electric furnaces - Electrostatic actuators - Electrostatics - Fluid structure interaction - Pumps - Residual stresses
Uncontrolled terms: 3D-finite element analysis - Circular diaphragms - Computational process - Design criterion - Driving voltages - Electrostatic micropump - Geometric non-linearity - Initial gap - Mode superposition - Mode superposition method - Numerical calculation - Optimization design - Pull-in - Pull-in instability - Pull-in voltage - Reduced order models - Short circuit - Theoretical basis
Classification code: 931.1 Mechanics - 921.6 Numerical Methods - 732.1 Control Equipment - 714 Electronic Components and Tubes - 704.2 Electric Equipment - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 642.2 Industrial Furnaces and Components - 631.1 Fluid Flow, General - 618.2 Pumps - 601.2 Machine Components - 532.3 Electric Metallurgical Furnaces - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.05.040
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 23. Accession number: 20102513030603
Title: Hatching egg fertility detection in vaccine preparation based on machine vision
Authors: Shan, Baoming1
Author affiliation: 1 College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Corresponding author: Shan, B. (booming_shan@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 178-181 203
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Machine vision was introduced into the vaccine preparation to detect the fertility of middle-stage hatching egg by using the image processing. According to the special requirements that all the infertile eggs should be detected and the original embryos fertility in eggs should not be affected by the detection, the design of imaging system and the method of how to detect the fertility by using the images were proposed. Firstly, images were enhanced and the special quality of shade was detected by multi-scale morphological transformation; secondly, the main blood-vessels in the hatching egg images was extracted by using local adaptive segmentation based on histogram-based WFCM; finally, the fertility by counting the number of the blood-vessels was detected. The method was simulated with 150 images under the Matlab7.0 environment. The detection accuracy rate, undetected error rate and false detected rate were respectively 99.33%, 0% and 0.67%. The detection of a single egg is 0.21s on average. The results showed that the method was efficient, but not sensitive to noise, color of egg shell, nor to the other pollution on the eggshell. It is capable to improve the detection accuracy and efficiency by replacing manual detection in vaccine preparation.
Number of references: 9
Main heading: Error detection
Controlled terms: Blood - Blood vessels - Computer vision - Digital image storage - Image segmentation - Imaging systems - Vaccines
Uncontrolled terms: Detection accuracy - Egg shells - Error rate - Fertility detection - Local-adaptive - Machine vision - Matlab7.0 - Morphological transformations - Multiscales - On-machines
Classification code: 746 Imaging Techniques - 723.5 Computer Applications - 731.6 Robot Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 741.2 Vision - 741.3 Optical Devices and Systems - 723.2 Data Processing and Image Processing - 722.1 Data Storage, Equipment and Techniques - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 461.9.1 Immunology - 461.6 Medicine and Pharmacology - 461.2 Biological Materials and Tissue Engineering - 722.4 Digital Computers and Systems
DOI: 10.3969/j.issn.1000-1298.2010.05.036
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 24. Accession number: 20102513030593
Title: Experiment on extrusion parameters of producing glucose syrup with extruded degermed maize added moderate temperature amylase
Authors: Ma, Chengye1, 2 ; Shen, Dechao2
Author affiliation: 1 Graduate Student College, Northeast Agricultural University, Harbin 150030, China
2 School of Agriculture and Food Engineering, Shandong University of Technology, Zibo 255091, China
Corresponding author: Shen, D. (shendc@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 126-130
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: Moderate temperature α-amylase was used during the extrusion and liquefaction of degermed corn. The method of the quadratic orthogonal rotating combination design of five factors (barrel temperature, moderate temperature α-amylase amount used in the extrusion, moderate temperature α-amylase amount used in liquefaction, liquefaction time, amyloglucosidase amount used in saccharifaction) and five levels was applied. The influence of extrusion and producing glucose syrup system parameters on DE value, filtration speed and transparence were studied. The optimized system parameters of extrusion and producing glucose syrup were used to produce glucose syrup, and DE value was 96.8%, filtration speed was 483.6 L/(m2 · h), transparence was 94.0%, the results of control test were: DE value was 72.5%, filtration speed 20.2L/(m2 · h), transparence 90.5%.
Number of references: 15
Main heading: Extrusion
Controlled terms: Glucose - Liquefaction - Speed - Transparency
Uncontrolled terms: Amyloglucosidase - Barrel temperature - Combination design - Control tests - Degermed corn - Extrusion parameter - Moderate temperature - Optimized system
Classification code: 931.1 Mechanics - 822.3 Food Products - 816.1 Processing of Plastics and Other Polymers - 804.1 Organic Compounds - 802.3 Chemical Operations - 741.1 Light/Optics - 535.2.2 Metal Forming Practice
DOI: 10.3969/j.issn.1000-1298.2010.05.026
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 25. Accession number: 20102513030597
Title: Design of embedded agricultural intelligence services system based on ZigBee technology
Authors: Sun, Yuwen1 ; Shen, Mingxia1 ; Zhang, Xiangfu1 ; Xiong, Yingjun1 ; Zhou, Liang1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Shen, M. (mingxia@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 148-151
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: Field information collecting device has the problems of high energy consumption, high cost, unable to conduct fixed and mobile collecting field information simultaneously. In order to solve these problems, a new type of agricultural information service system was designed. It is composed of three parts: ZigBee wireless sensor modules with the functions of acquiring information from farmland; mobile terminals base on DSP and ARM9 with the function of passing the field information to the agricultural producers; WebGIS agricultural information management system with the function of guiding the policy-makers' for decision-making. Finally, the experiment was carried out and some explanations and indications were given to the problems of the system that need to be improved.
Number of references: 9
Main heading: Embedded systems
Controlled terms: Decision making - Design - Information management - Information services - Problem solving
Uncontrolled terms: Agricultural information - High costs - High energy consumption - Information collecting - Information design - Information management systems - Intelligence services - Mobile terminal - Policy makers - System-based - Web-GIS - Wireless sensor - Zig-Bee - ZigBee technology
Classification code: 921 Mathematics - 912.2 Management - 903.4 Information Services - 903.2 Information Dissemination - 902.1 Engineering Graphics - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.05.030
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 26. Accession number: 20102513030568
Title: State estimation of vehicle steering based on control information of anti-lock braking system
Authors: Zhang, Yonghui1 ; Yu, Liangyao1 ; Song, Jian1
Author affiliation: 1 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Corresponding author: Zhang, Y. (zhangyonghui06@mails.tsinghua.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 1-5
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For the purpose of optimizing control strategy of anti-lock braking system (ABS) under the steering and braking combined working condition, the vehicle steering state should be identified. The steering parameters adapted to ABS application were selected which were composed of vehicle velocity, turning direction and steering angle. The applied direct and indirect measure technologies were compared. According to the principle of kinematics of four-wheel vehicle and stable steering characteristic of two-degree-of-freedom vehicle model, the steering parameters estimation algorithms using ABS wheel speed and control information were researched. System test was carried out by the experiment of the steady static circular running and braked steering. The test results showed good accuracy of the parameters estimation.
Number of references: 5
Main heading: Steering
Controlled terms: Automobile parts and equipment - Automobile steering equipment - Brakes - Braking - Parameter estimation - State estimation - Wheels
Uncontrolled terms: Antilock braking systems - Control information - Direct and indirect measures - Optimizing control - Parameters estimation - Steering angles - Steering characteristics - Steering parameters - System test - Test results - Two-degree-of-freedom - Vehicle velocity - Wheel speed - Working conditions
Classification code: 601.2 Machine Components - 602 Mechanical Drives and Transmissions - 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment - 731.1 Control Systems
DOI: 10.3969/j.issn.1000-1298.2010.05.001
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 27. Accession number: 20102513030604
Title: Strategy for flow and pressure control of electro hydraulic proportional separate meter in and separate meter out control system
Authors: Liu, Yingjie1 ; Xu, Bing1 ; Yang, Huayong1 ; Zeng, Dingrong1
Author affiliation: 1 State Key Lab. of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Liu, Y. (yingjieljd@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 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 components and work principle of the separate meter in and separate meter out (SMISMO) load sensing electro hydraulic system were introduced. The simulation model of studied system was built, a flow rate and pressure controller was designed to control both velocity of piston in the cylinder and pressure in the cylinder chamber. The flow rate controller was designed based on the calculation flow rate feedback, and the pressure flow compound control was realized based on the pressure close loop pressure controller. Simulation and experiment showed that the novel control system possessed high velocity control precise and good energy saving characteristics, the effects of SMISMO valve element frequency and damping on system control performance were studied by simulation. It provided theory support for design and application of the novel system.
Number of references: 12
Main heading: Controllers
Controlled terms: Computer simulation - Control systems - Cylinders (shapes) - Hydraulic equipment - Hydraulics - Pressure control
Uncontrolled terms: Close loop - Compound control - Cylinder chambers - Design and application - Electro-hydraulic proportion - Electro-hydraulic system - Electro-hydraulics - Energy saving - High velocity - Load sensing - Pressure controllers - Pressure flow - Simulation model - System control - Work principle
Classification code: 732.1 Control Equipment - 731.3 Specific Variables Control - 731.1 Control Systems - 723.5 Computer Applications - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.05.037
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 28. Accession number: 20102513030584
Title: Experiment on fast pyrolysis process of peanut shell
Authors: Zhang, Changsen1 ; Shi, Wen2 ; Xu, Xingmin2 ; Ma, Meiying2 ; Zhao, Hongjie2 ; Zhang, Ruiqin2
Author affiliation: 1 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
2 Research Institute of Environmental Sciences, Zhengzhou University, Zhengzhou 450001, China
Corresponding author: Zhang, R. (rqzhang@zzu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 82-85 147
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: Experimental researches on fast pyrolysis of peanut shell were performed in a self-manufactured bench-scale fluidized bed reactor at 500°C. Mass balance of pyrolysis reaction was carried out. Influence of collecting ways on bio-oil yield was investigated. Results showed that bio-oil yield raised from 40% to 64% after the electrostatic precipitators (ESP)settled at the end part of the fractional condensers which prevented bio-oil from losing together with produced gas and cleaned the produced gas. Energy consumption of peanut shell pyrolysis was monitored at about 2304 kJ/kg with a watt-hour meter. The physical properties and application of bio-oil were discussed by means of analysis instruments.
Number of references: 15
Main heading: Electrostatic precipitators
Controlled terms: Chemical reactors - Electric furnaces - Electrostatic separators - Electrostatics - Fluid catalytic cracking - Fluidization - Fluidized beds - Pyrolysis - Shells (structures)
Uncontrolled terms: Bench-scale fluidized bed - Bio-oil - Bio-oil yield - Energy consumption - Experimental research - Fast pyrolysis - Mass balance - Peanut shell - Peanut shells - Pyrolysis reaction
Classification code: 802.3 Chemical Operations - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 704.2 Electric Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 642.2 Industrial Furnaces and Components - 532.3 Electric Metallurgical Furnaces - 521.2 Combustors - 513.1 Petroleum Refining, General - 451.2 Air Pollution Control - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.05.017
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 29. Accession number: 20102513030580
Title: Optimization for the hydraulic performance of centrifugal blade based on the genetic algorithm
Authors: Tian, Hui1 ; Sun, Xiuling1 ; Guo, Tao1 ; Li, Guojun1
Author affiliation: 1 School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Corresponding author: Li, G. (liguojun@mail.xjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 64-67 119
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 new optimization method based on genetic algorithm for the optimization of a centrifugal blade profile was presented. Different from the traditional optimization method, the hydraulic performance of centrifugal blade profile was predicted with CFD technology in the new developed method. The hydraulic efficiency and theoretical head were defined as the objective functions for the blade profile optimization using multiobjective genetic algorithm. Three key technologies were employed as the follows: 3-D blade profile parameterization, grid generation & CFD analysis, multiobjective optimization. By this optimization method, a single-stage single-suction centrifugal blade was redesigned and optimized at the design condition. The results showed that the objective function values of the maximum hydraulic efficiency and the theoretical head were increased by 0.35% and 0.944% respectively.
Number of references: 14
Main heading: Multiobjective optimization
Controlled terms: Centrifugal pumps - Centrifugation - Genetic algorithms - Hydraulic machinery - Hydraulics - Mesh generation - Parameterization - Pumping plants - Pumps
Uncontrolled terms: Blade profile - CFD analysis - Design condition - Grid generation - Hydraulic efficiency - Hydraulic performance - Key technologies - Multi objective - Multi-objective genetic algorithm - Objective function values - Objective functions - Optimization method - Single stage
Classification code: 921.5 Optimization Techniques - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 802.3 Chemical Operations - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings
DOI: 10.3969/j.issn.1000-1298.2010.05.013
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 30. Accession number: 20102513030594
Title: Optimization of ultrasonic-enzyme-assisted extraction technology of polysaccharides from Longan pulp
Authors: Yi, Yang1 ; Zhang, Mingwei2 ; Liao, Sentai2 ; Tang, Xiaojun2 ; Zhang, Ruifen2 ; Wei, Zhencheng2
Author affiliation: 1 College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2 Bio-Tech Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, China
Corresponding author: Liao, S. (liaost@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 131-136
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 effects of the amount of enzyme added, ultrasonic power, enzymolysis temperature, pH value and time on the extraction yield of polysaccharides from longan pulp were optimized by response surface methodology. The optimal technological conditions of extraction by ultrasonic and cellulase were determined, then regression mathematical model was established. The optimal technological parameters are as follows: longan pulp with water ratio is 8.47%, cellulase additive ratios is 2000 U/g, ultrasonic power is 250 W, enzymolysis temperature is 55°C, enzymolysis pH value is 5.0, enzymolysis time is 60 min, under such conditions, the polysaccharides extraction rate is 38.71%. This result approximated to the value of mathematical model calculated.
Number of references: 15
Main heading: pH effects
Controlled terms: Enzymes - Extraction - Mathematical models - Optimization - Polysaccharides - Process control - Ultrasonic waves - Ultrasonics
Uncontrolled terms: Cellulase - Extraction rate - Extraction technology - Extraction yield - Longan - pH value - Process optimization - Response Surface Methodology - Technological conditions - Technological parameters - Ultrasonic power - Water ratio
Classification code: 921 Mathematics - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 802.3 Chemical Operations - 921.5 Optimization Techniques - 801.2 Biochemistry - 753.1 Ultrasonic Waves - 731 Automatic Control Principles and Applications - 461.2 Biological Materials and Tissue Engineering - 801.1 Chemistry, General
DOI: 10.3969/j.issn.1000-1298.2010.05.027
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 31. Accession number: 20102513030605
Title: Calculation of meshing efficiency for spiral bevel gears under the condition of mixed elastohydrodynamic lubrication
Authors: Gu, Jiangong1 ; Fang, Zongde1 ; Su, Jinzhan1 ; Shen, Yunbo1
Author affiliation: 1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Corresponding author: Gu, J. (agunwpu@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 188-192
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The average sliding friction coefficient was derived in the mixed elastohydrodynamic lubrication state, with complete elastohydrodynamic and boundary lubrication. Based on the geometry and load contact characteristics of spiral bevel gears, the sliding friction power loss of each point on the long axis of the instantaneous contact ellipse was calculated. Meanwhile, the function of sliding friction power loss in a meshing period was established. The meshing efficiency of spiral bevel gears was calculated by integrating the function under the condition of mixed elastohydrodynamic lubrication. This algorithm was demonstrated to be correct and precise compared with Gleason corporation's method of calculating the meshing efficiency of bevel gears.
Number of references: 18
Main heading: Bevel gears
Controlled terms: Elastohydrodynamic lubrication - Elastohydrodynamics - Friction - Tribology
Uncontrolled terms: Boundary lubrications - Contact ellipse - Load contacts - Long axis - Meshing efficiency - Sliding friction - Sliding friction coefficient - Spiral bevel gear - Spiral bevel gears
Classification code: 601.2 Machine Components - 607.2 Lubrication - 631.1.1 Liquid Dynamics - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI: 10.3969/j.issn.1000-1298.2010.05.038
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 32. Accession number: 20102513030600
Title: Algorithm for inspection of white foreign fibers in cotton by machine vision with irregular imaging function
Authors: Li, Guohui1 ; Su, Zhenwei1 ; Xia, Xinyi1
Author affiliation: 1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China
Corresponding author: Su, Z. (zhenweisu99@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 164-167
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: It is difficult to detect white foreign fibers in cotton by traditional machine vision systems and image segmentation methods, because the color of the targets and background is very close. To solve the problem, an image segmentation algorithm for a machine vision system with an irregular imaging function was presented. Using Gabor operator to extract the orientation feature vectors of an image, combined them into a feature map, thus the contrast between the background and targets was improved by the algorithm. Then a threshold was calculated according to the statistical characteristics of the feature maps. Finally, the white foreign fibers were separated from cotton in the binary image, and the image noises were eliminated by a morphological operation. The experimental results indicated that the algorithm is anti-noise and capable of detecting the targets.
Number of references: 18
Main heading: Image segmentation
Controlled terms: Algorithms - Computer vision - Cotton - Digital image storage - Feature extraction - Fibers - Mathematical morphology - Mathematical operators - Targets
Uncontrolled terms: Feature map - Foreign fiber - Image noise - Image segmentation algorithm - Imaging functions - Imaging machines - Machine vision - Machine vision systems - Morphological operations - Orientation features - Statistical characteristics
Classification code: 741.3 Optical Devices and Systems - 751.1 Acoustic Waves - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 819.1 Natural Fibers - 819.4 Fiber Products - 821.4 Agricultural Products - 921 Mathematics - 932.1.1 Particle Accelerators - 741.2 Vision - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 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 - 723.5 Computer Applications - 731.6 Robot Applications - 741.1 Light/Optics
DOI: 10.3969/j.issn.1000-1298.2010.05.033
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 33. Accession number: 20102513030575
Title: Effects of flow velocity to surface topographic characteristics of biofilm on lateral pipes of reclaimed wastewater irrigation
Authors: Li, Guibing1 ; Ren, Shumei1 ; Xu, Tingwu2 ; Yang, Peiling1 ; Li, Yunkai1 ; Yan, Dazhuang1
Author affiliation: 1 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
2 International Education College, China Agricultural University, Beijing 100083, China
Corresponding author: Ren, S. (renshumei@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 36-41 63
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: 3-D topography of white light interference instrument was used to observe the surface topography of biofilm under different velocity rates in PE pipe, and the impact of velocity rate and surface topography of biofilm was analyzed. The results showed that more solid particulate was on biofilm surface with roughness in the middle-velocity zone. In the high-velocity zone, biofilm surface was smoother and biofilm's thickness was thinner. The relationship between the average thicknesses of biofilm with velocity rate agreed to the exponential law whose maxima velocity rate is 0.22 m/s. Under the condition of velocity rate is greater than 0.90 m/s, the growth rate of biofilm was decreased faster with the increase of velocity rate, and more biofilm fell off, and hydraulic shear stress force increased rapidly, so cleaning velocity rate of the drip irrigation system should be larger than 0.90 m/s.
Number of references: 20
Main heading: Surface topography
Controlled terms: Biofilms - Biofilters - Irrigation - Pipe - Topography - Velocity - Wastewater - Wastewater reclamation - Wastewater treatment
Uncontrolled terms: 3-D topography - Drip irrigation - Drip irrigation systems - Exponential law - High velocity - Lateral pipes - Re-claimed water - Reclaimed wastewater - Solid particulates - White light interference
Classification code: 462.5 Biomaterials (including synthetics) - 481.1.1 Geomorphology - 619.1 Pipe, Piping and Pipelines - 821.3 Agricultural Methods - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science - 461.8 Biotechnology - 405.3 Surveying - 445.1 Water Treatment Techniques - 451.2 Air Pollution Control - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 454.2 Environmental Impact and Protection
DOI: 10.3969/j.issn.1000-1298.2010.05.008
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 34. Accession number: 20102513030608
Title: Design and performance test on circular two piezoelectric pump with active valve
Authors: Cheng, Guangming1 ; He, Lipeng1 ; Zeng, Ping1 ; Li, Peng1 ; Kan, Junwu1 ; Yang, Zhigang1
Author affiliation: 1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: Zeng, P. (piaoyi820703@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 204-208
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 new type of piezoelectric pump with active valve was designed. By means of derivation piezoelectric pump flux formula, main factors which influenced flux of the active valve were analyzed, i.e. inside diameter and the width of the valve seat. The test result showed that working frequency, the power supply voltage, the output backpressure, phase difference between the driving signal of active valve and the pump were the most influential factors on the performance of piezoelectric pump with the active valve. The designed initiative piezoelectric pump has the capacity of delivering liquid in two directions. The experimental results showed that the flux of designed piezoelectric pump could reach 123 mL/min, under the condition of sinusoidal driving signal at 30 Hz and 120 V.
Number of references: 10
Main heading: Pumps
Controlled terms: Design - Piezoelectric devices - Piezoelectricity
Uncontrolled terms: Active valves - Back pressures - Circular piezoelectric factor - Driving signal - Influential factors - Performance tests - Phase difference - Piezoelectric pump - Piezoelectric-pump with active valve - Power supply voltage - Sinusoidal driving - Test results - Valve seats - Working frequency
Classification code: 902.1 Engineering Graphics - 714 Electronic Components and Tubes - 708.1 Dielectric Materials - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 618.2 Pumps - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.05.041
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 35. Accession number: 20102513030599
Title: Method of mobile robot global localization based on laser range finder in greenhouse
Authors: Liu, Dongbo1, 2 ; Liu, Guorong1, 2 ; Hu, Hui1, 2 ; Yu, Miaohua2
Author affiliation: 1 College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
2 College of Computer and Communication, Hunan Institute of Engineering, Xiangtan 411104, China
Corresponding author: Liu, D. (ldbymh@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 158-163
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 deal with the localization problem of robot equipped with laser sensor, a mobile robot Monte Carlo self-localization method based on adaptive curvature estimation for environmental features extracted was proposed. During the mobile robot localization, poses of the robot were predicted by motion-model, and then distribution of particles set was updated according to the similarity measurements of geometry by observation model, and robot self-localization was realized. Simulation experiments showed the proposed method could satisfy the requirements of the mobile robot self-localization in greenhouse.
Number of references: 10
Main heading: Mobile robots
Controlled terms: Estimation - Greenhouses - Monte Carlo methods - Range finders - Range finding - Robot applications
Uncontrolled terms: Adaptive curvature estimation - Curvature estimation - Laser range finder - Laser range finders - Monte Carlo localization
Classification code: 943.1 Mechanical Instruments - 941.3 Optical Instruments - 922.2 Mathematical Statistics - 921 Mathematics - 943.2 Mechanical Variables Measurements - 821.6 Farm Buildings and Other Structures - 731.5 Robotics - 404.1 Military Engineering - 402.1 Industrial and Agricultural Buildings - 731.6 Robot Applications
DOI: 10.3969/j.issn.1000-1298.2010.05.032
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 36. Accession number: 20102513030569
Title: Simulation on shift dynamics and control of dual clutch transmissions
Authors: Zhang, Jinle1 ; Ma, Biao1 ; Zhang, Yingfeng1, 2 ; Li, Heyan1
Author affiliation: 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2 Department of Automobile Engineering, Academy of Military Transportation, Tianjin 300161, China
Corresponding author: Ma, B. (mabiao@bit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 6-11
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 DCT structure, which adopted on a certain tracked vehicle, was proposed and system dynamic equations were derived according to the detailed analysis of upshifts and downshifts. The analytical model for the simulation, analysis and control of shift dynamics for DCT vehicles was built by means of Matlab/Simulink. An upshift and a downshift were simulated as case study and simulation results displayed the parameters have important influence on shift quality. A PID controller was proposed to control the oil pressure in on-coming clutch in upshift process and a PI controller was also put forward to control oil throttle in downshift process. Such control strategies can avoid clutch tie-up and engine flare, result in better shift quality.
Number of references: 10
Main heading: Clutches
Controlled terms: Computer simulation - Controllers - Fuzzy control - Mathematical models - Process control
Uncontrolled terms: Analytical model - Control simulation - Control strategies - Dual clutch transmission - MATLAB /simulink - Oil pressures - PI Controller - PID controllers - Shift dynamics - Shift quality - Simulation result - System Dynamics
Classification code: 602.2 Mechanical Transmissions - 723.4 Artificial Intelligence - 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 732.1 Control Equipment - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.05.002
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 37. Accession number: 20102513030572
Title: Road condition detection based on road temperature and solar radiation
Authors: Lu, Junhui1, 2 ; Wang, Jianqiang1 ; Li, Keqiang1 ; Lian, Xiaomin1
Author affiliation: 1 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
2 Physics and Information Engineering Institute, Jianghan University, Wuhan 430056, China
Corresponding author: Lu, J. (ljh@mail.tsinghua.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 21-23 11
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: Road temperature depends on road condition (dry, wet, snowy, icy) and solar radiation (mapped to season, geographical location, time, air temperature and air humidity), and there is the nonlinear causality among them, thus, road condition can be detected indirectly by road temperature and solar radiation with BP neural network. During the experiment to detect road condition (dry, wet), BP neural network was trained with 1344 group data and validated by 96 group data, the road condition detection accuracy reached 90%.
Number of references: 10
Main heading: Neural networks
Controlled terms: Roads and streets - Solar radiation - Sun
Uncontrolled terms: Air humidity - Air temperature - BP neural networks - Geographical locations - Road condition - Road temperature
Classification code: 406.2 Roads and Streets - 461.1 Biomedical Engineering - 657.1 Solar Energy and Phenomena - 657.2 Extraterrestrial Physics and Stellar Phenomena - 723.4 Artificial Intelligence
DOI: 10.3969/j.issn.1000-1298.2010.05.005
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 38. Accession number: 20102513030585
Title: Effect of densification processing on physical quality and mechanical properties of corn stover
Authors: Hou, Zhendong1 ; Tian, Xiaoyu1 ; Xu, Yang1
Author affiliation: 1 School of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Xu, Y. (xuyang@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 86-89
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: Corn stover was taken as the object in the research. The material and compression character, the effects of heating temperature, moisture content and pressure on the physical quality and mechanical properties of corn stover were studied respectively. During the study, axial displacement, diametrical peak displacement and peak stress were all used to scale mechanics properties of corn stover. The results showed that when compression pressure of 60~90 MPa applied, moisture content of the grind was 8%-12% and heating temperature was at 75~100°C, the produced briquettes was with high-quality which was easy to store and transport.
Number of references: 11
Main heading: Mechanical properties
Controlled terms: Densification - Heating - Moisture - Moisture determination - Stresses
Uncontrolled terms: Axial displacements - Compression pressures - Corn stover - Heating temperatures - High quality - Mechanics property - Moisture contents - Peak displacement - Peak stress - Physical quality
Classification code: 944.2 Moisture Measurements - 931.1 Mechanics - 802.3 Chemical Operations - 801.4 Physical Chemistry - 951 Materials Science - 643.1 Space Heating - 443.1 Atmospheric Properties - 421 Strength of Building Materials; Mechanical Properties - 408.1 Structural Design, General - 642.1 Process Heating
DOI: 10.3969/j.issn.1000-1298.2010.05.018
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 39. Accession number: 20102513030601
Title: Egg geometry calculations based on machine vision
Authors: Zhou, Ping1, 2 ; Zhao, Chunjiang1 ; Wang, Jihua1 ; Zheng, Wen'gang1 ; Sun, Zhongfu2 ; Wen, Youxian3
Author affiliation: 1 Department of Agricultural Automation, Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
2 Institute of Environment and Sustainable Development in Agriculture, The Chinese Academy of Agricultural Sciences, Beijing 100081, China
3 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Zhao, C. (zhaocj@nercita.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 168-171 208
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 conventional manual methods for egg volume(V) and surface area'(S) detection are usually slow, inefficient and not able to meet the actual production requirements, so machine vision technology was researched to replace them. Assumed the ideal egg image was symmetric about longitudinal diameter, the definition of volume pixel(Vp), surface areas pixel(Sp) and the calculation were proposed. Then, the module between volume (surface area) and Vp (Sp) was established. Experimental results showed that the determination coefficient of volume module and surface area was 0.965 and 0.971, respectively; the test accuracy of egg volume module and surface area reached 92% with ±1 cm3 error and 88% with ±1cm2 error respectively.
Number of references: 14
Main heading: Computer vision
Controlled terms: Pixels
Uncontrolled terms: Determination coefficients - Machine vision - Machine vision technologies - Manual methods - On-machines - Production requirements - Surface area - Test accuracy
Classification code: 722.2 Computer Peripheral Equipment - 723.5 Computer Applications - 731.6 Robot Applications - 741.2 Vision - 742.2 Photographic Equipment
DOI: 10.3969/j.issn.1000-1298.2010.05.034
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 40. Accession number: 20102513030592
Title: Production of ACE inhibitor peptides from Porphyra yezoensis in batch membrane reactor based on RBF-ANN
Authors: Liu, Bin1 ; Ma, Haile1 ; Li, Shujun1, 2 ; Li, Wen1 ; Xin, Junwei1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Ma, H. (mhl@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 120-125
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 explore an optimal preparation method of angiotensin converting enzyme (ACE) inhibitor peptides from Porphyra yezoensis with protease, several conditions about batch membrane reaction with raw material feeding were attempted in enzymatic membrane reactor. Radial basis function neural network (RBF-ANN) models were employed to optimize the condition. Some parameters were optimized based on cross-validation to calibrate a robust model. The optimal operating conditions for the maximum protein conversion rate obtained by the model were as followings: substrate concentration 1.0 g/mL, enzyme concentration 4%, reaction temperature 50°C, pH value 9.0, pump rotation speed 300 r/min and reaction time 60 min. Under these conditions, protein conversion rate was 55.67%, the yield of peptides was 22.27%, quantity of peptides per gram of enzyme was 13.91 and IC50 was 0.492 mg/mL. Base on the optimum conditions enzyme membrane reaction with continuous feeding Porphyra yezoensis was also studied: compared to the traditional methods, protein conversion rate improved by 21.98%, yield of peptides increased by 8.79%, and quantity of peptides per gram of enzyme was improved by 4.7 times.
Number of references: 16
Main heading: Enzymatic hydrolysis
Controlled terms: Bioreactors - Enzymes - Feeding - Membranes - Neural networks - Optimization - Peptides - Process control - Radial basis function networks
Uncontrolled terms: ACE inhibitor peptides - ACE inhibitors - Angiotensin-converting enzyme - Continuous feeding - Conversion rates - Cross validation - Enzymatic membrane reactors - Enzyme concentrations - Enzyme membranes - Membrane reactor - Membrane separation process - Optimal operating conditions - Optimum conditions - pH value - Porphyra yezoensis - Preparation method - Process optimization - Radial basis function neural networks - Reaction temperature - Reaction time - Robust models - Rotation speed - Substrate concentrations
Classification code: 951 Materials Science - 731 Automatic Control Principles and Applications - 801.2 Biochemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 921.5 Optimization Techniques - 723.4 Artificial Intelligence - 462.1 Biomedical Equipment, General - 461.9 Biology - 461.8 Biotechnology - 461.2 Biological Materials and Tissue Engineering - 461.1 Biomedical Engineering - 691.2 Materials Handling Methods
DOI: 10.3969/j.issn.1000-1298.2010.05.025
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 41. Accession number: 20102513030588
Title: Optimum technology and properties of granular-cold-water-soluble maize starch
Authors: Liu, Tianyi1 ; Ma, Ying1 ; Li, Qiming1, 2
Author affiliation: 1 College of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
2 New Hope Dairy Holdings Co., Ltd., Chengdu 610063, China
Corresponding author: Ma, Y. (maying@hit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 99-104
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The method of planetary ball mill was applied to produce granular-cold-water-soluble maize starch. Based on the single-factor test, the technical conditions of the ball mill were optimized through Box-Benhnken center composite design and response surface methodology. The properties of granular-cold-water-soluble maize starch were analyzed using polarization microscopy, scanning electronic microscopy and X-ray diffraction. The results showed that the optimum technical conditions are that the milling time is 3.24 h, the rotating speed is 555r/min and the ratio of ball to material is 6.52:1. At the optimum conditions, the average cold water solubility of granular-cold-water-soluble maize starch is 57.95%. The granular morphology of granular-cold-water-soluble maize starches became coarse instead of smooth and Maltese crosses were disappeared, the crystalline structure of granular-cold-water-soluble maize starches were changed from polycrystalline granules to non-crystalline granules gradually, the turbidity of granular-cold-water-soluble maize starch decreased.
Number of references: 20
Main heading: Ball mills
Controlled terms: Ball milling - Crystalline materials - Granulation - Milling (machining) - Optimization - Process control - Solubility - Spheres - Starch - Turbidity - X ray diffraction
Uncontrolled terms: Cold waters - Composite designs - Crystalline structure - Granular morphology - Maize starch - Maltese cross - Milling time - Optimum conditions - Planetary ball mill - Polarization microscopy - Polycrystalline - Response Surface Methodology - Rotating speed - Scanning electronic microscopy - Technical conditions - Water solubilities
Classification code: 804.1 Organic Compounds - 815.1.1 Organic Polymers - 822.3 Food Products - 802.3 Chemical Operations - 921.5 Optimization Techniques - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice - 931.3 Atomic and Molecular Physics - 802.1 Chemical Plants and Equipment - 531.2 Metallography - 533.1 Ore Treatment - 604.2 Machining Operations - 482.2 Minerals - 631 Fluid Flow - 741.1 Light/Optics - 801.4 Physical Chemistry - 731 Automatic Control Principles and Applications
DOI: 10.3969/j.issn.1000-1298.2010.05.021
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 42. Accession number: 20102513030573
Title: Method on identification of multi-lane frontage under the complex condition
Authors: Zhang, Runsheng1 ; Huang, Xiaoyun1 ; Ma, Lei1
Author affiliation: 1 College of Vehicle and Energy, Yanshan University, Qinhuangdao 066004, China
Corresponding author: Zhang, R. (zrs1960@sohu.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 24-29 114
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 identified driving lane, identification will be extended from single-lane to multi-lane by way of ROI (region of interest) control. The concept of confidence was introduced in order to judge the degree of accuracy on each lane, and the calculation of confidence was given under the complex condition. If the accuracy of some lanes was below the threshold, those ROI of the search parameters would be adjusted accordingly so as to avoid the search target being out of the established ROI. At the same time, by analyzing the image sequences, with the combination of the structural characteristics of each lane, the identification result was judged, that could effectively eliminate the effect of vehicles driving on adjacent lanes and remain no lane next to the driving lane upon identification. In this way, the recognition reliability increased. It is proved that this method could improve the accuracy of multi-lane identification.
Number of references: 10
Main heading: Identification (control systems)
Controlled terms: Image processing - Intelligent vehicle highway systems
Uncontrolled terms: Complex condition - Degree of accuracy - Image sequence - Intelligent vehicles - Region of interest - Search parameters - Structural characteristics
Classification code: 406.1 Highway Systems - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.1 Control Systems - 741 Light, Optics and Optical Devices
DOI: 10.3969/j.issn.1000-1298.2010.05.006
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 43. Accession number: 20102513030583
Title: Catalytic decomposition of naphthalene and phenol over biomass char
Authors: Peng, Junxia1, 2 ; Zhao, Zengli1 ; Pan, Shouju3 ; Li, Haibin1
Author affiliation: 1 Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3 Guangzhou Research Institute of Environment Protection, Guangzhou 510620, China
Corresponding author: Li, H. (lihb@ms.giec.ac.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 76-81
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Biomass tar catalytic decomposition upon pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was studied by taking naphthalene and phenol as model compound. The effect of reaction temperature, charring conditions, such as the pyrolysis temperature, the heating rate and the precursors on model compound conversion was determined. The results showed that tar conversion increased with the increasing reaction temperature; higher charring temperature and higher heating rate could enlarge the surface area and pore volume of biomass chars and also enhance tar conversion. Conversion of naphthalene and phenol were 55.6% and 76% respectively on biomass char prepared at 850°C with quick heating rate. Scanning electron microscope (SEM) and test results of char mineral oxides contents showed that catalytic activity of biomass chars was related to their surface morphology and the mineral oxides contents.
Number of references: 22
Main heading: Naphthalene
Controlled terms: Biomass - Heating - Heating rate - Phenols - Pyrolysis - Scanning electron microscopy - Silicate minerals - Tar
Uncontrolled terms: Biomass char - Biomass tar - Catalytic activity - Catalytic decomposition - Mineral oxides - Model compound - Pore volume - Pyrolysis temperature - Pyrolysis-gas chromatography/mass spectrometry (py-GC/MS) - Reaction temperature - Scanning electron microscopes - Surface area - Test results
Classification code: 741.1 Light/Optics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 805.1.1 Biochemical Engineering - 821.5 Agricultural Wastes - 931.2 Physical Properties of Gases, Liquids and Solids - 643.1 Space Heating - 411 Bituminous Materials - 482.2 Minerals - 513 Petroleum Refining - 524 Solid Fuels - 525.1 Energy Resources and Renewable Energy Issues - 641.2 Heat Transfer - 642.1 Process Heating
DOI: 10.3969/j.issn.1000-1298.2010.05.016
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 44. Accession number: 20102513030595
Title: Vision navigation control system for combine harvester
Authors: Ding, Youchun1 ; Wang, Shumao2
Author affiliation: 1 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Wang, S. (wangshumao@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 137-142
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The vision navigation control hardware system was set up in the combine harvester and a histogram fusion algorithm for multi-frame navigation lines was put forward. On the basis of kinematics of simplified two-wheel vehicle, model one fuzzy PD controller was constructed. The tests in wheat field show that the rotation and projection algorithm with histogram fusion algorithm is valid to recognize the cut/uncut line, and can improve the precision of the system and robustness, the change of harvesting width is in 0.18 m during the working speed, and it could come back to the right path in 2-5 s when given manual disturbance using steering wheel.
Number of references: 14
Main heading: Harvesters
Controlled terms: Algorithms - Control theory - Graphic methods - Navigation - Pneumatic control equipment - Wheels
Uncontrolled terms: Combine harvester - Combine harvesters - Fusion algorithms - Fuzzy PD controller - Multi-frame - Projection algorithms - Steering wheel - Two-wheel vehicles - Vision navigation - Wheat fields - Working speed
Classification code: 921 Mathematics - 902.1 Engineering Graphics - 821.1 Agricultural Machinery and Equipment - 732.1 Control Equipment - 731.1 Control Systems - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716.3 Radio Systems and Equipment - 655.1 Spacecraft, General - 632.4 Pneumatic Equipment and Machinery - 601.2 Machine Components - 434.4 Waterway Navigation - 431.5 Air Navigation and Traffic Control
DOI: 10.3969/j.issn.1000-1298.2010.05.028
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 45. Accession number: 20102513030591
Title: Design and test of near infrared detector for grain component based on virtual instrument
Authors: Yin, Huimin1 ; Wu, Wenfu2 ; Fu, Yao3 ; Zhang, Yaqiu2 ; Liu, Lantao2
Author affiliation: 1 College of Engineering Technology, Jilin Agricultural University, Changchun 130118, China
2 College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
3 College of Mathematics, Jilin University, Changchun 130012, China
Corresponding author: Wu, W. (wwfzlb@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 5
Issue date: May 2010
Publication year: 2010
Pages: 115-119
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: Combining near infrared spectroscopy technology with virtual instrument technology, a multi-band near infrared detector for grain component was developed. Adopted diffuse reflection principle, the instrument is composed of optical system, circuit system and software system. The working process is as the follows: being frequently modulated, the full spectrum light issued by halogen light was transformed into the scan spectra via the scanning spectral filter through the sample diffuse reflectance, then it was converted to electrical signals after being received by the detector. After that, a conditioning conversion was adopted, and finally it was sent to computer by the acquisition card for further processing. A system-testing was performed based on the 26 prepared samples. Test results showed that the equipment has low noise level, inferior reproducibility, and the forecast-accuracy is not very good. But the accuracy can be improved by way of measuring average after loading repeatedly. The instrument can be used for measuring many ingredients in the grain samples, such as protein, starch and fat.
Number of references: 8
Main heading: Infrared spectroscopy
Controlled terms: Detectors - Digital instruments - Electric load forecasting - Infrared detectors - Infrared spectrometers - Near infrared spectroscopy - Optical systems - Reflection - Spectrometry - Technology
Uncontrolled terms: Acquisition cards - Component based - Diffuse reflectance - Diffuse reflection - Electrical signal - Full-spectrum light - Low noise levels - Multiband - Near infrared detector - Near infrared spectrometer - Reproducibilities - Software systems - Spectral filters - Test results - Virtual instrument - Virtual instrument technology - Working process
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941 Acoustical and Optical Measuring Instruments - 944.7 Radiation Measuring Instruments - 941.4 Optical Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 914.1 Accidents and Accident Prevention - 914 Safety Engineering - 706.1 Electric Power Systems - 711 Electromagnetic Waves - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 901 Engineering Profession
DOI: 10.3969/j.issn.1000-1298.2010.05.024
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
? 2009 Elsevier Inc. All rights reserved.
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