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2010年第41卷第2期共收录44篇
1. Accession number:20101512841313
Title: Correlation between fluctuation of speed and combustion nonuniformity in a diesel engine
Authors: Du, Wei1 ; Liu, Fushui1
Author affiliation: 1 School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Du, W. (dwei@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: 2
Issue date: February 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: For a V-type six-cylinder supercharged diesel engine, the transient engine speed and the pressure in each cylinder were measured under different engine speeds and loads. The correlation between the fluctuations of transient engine speed and the combustion nonuniformity of the six cylinders were analyzed. The results indicated that a wave peak of transient engine speed emerges at the point between the two peaks of cylinder pressure of two adjacent fired cylinders. And, the more the output of positive work is in one cylinder, the larger the subsequent peak value of fluctuant engine speed is. When the mean engine speed is constant, the higher the load is, the larger the fluctuation ratio of engine speed is. However, when the load is same, the fluctuation ratio is independent to the mean engine speed.
Number of references: 9
Main heading: Engine cylinders
Controlled terms: Combustion - Cylinders (shapes) - Diesel engines - Engines - Smoke - Speed
Uncontrolled terms: Cylinder pressures - Engine speed - Nonuniformity - Peak values - Several-cylinder diesel engine
Classification code: 931.1 Mechanics - 804 Chemical Products Generally - 801.3 Colloid Chemistry - 654.2 Rocket Engines - 617.3 Steam Engines - 612.2 Diesel Engines - 612.1.1 Internal Combustion Engine Components - 612 Engines - 521.1 Fuel Combustion - 451.1 Air Pollution Sources - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.02.004
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 2. Accession number: 20101512841332
Title: Effects of temperature on gas permeability of films for modified atmosphere packaging
Authors: Li, Xia1 ; Wang, Xiangyou1 ; Wang, Juan1
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: 2
Issue date: February 2010
Publication year: 2010
Pages: 113-116
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The gas permeability coefficients of different material films at 2, 4, 8 and 20°C were measured by small bags method. The influences of temperature on the gas permeability coefficient and gas permeability coefficient ratio were analyzed. The results suggested that the gas permeability coefficients of films increases with temperature; as the temperature increased, the gas permeability coefficient ratio of LDPE significantly increases, while the gas permeability coefficient ratio of PVC shows different changing trends at the experimental temperature. The relationship between permeability coefficients and temperature well accords with Arrhenius equation, and a linear relationship lies between nature logarithmic of gas permeability coefficient and the reciprocal of temperature.
Number of references: 15
Main heading: Gas permeable membranes
Controlled terms: Atmospheric temperature - Capillarity - Gas permeability - Gases - Hydraulic conductivity - Polyvinyl chlorides
Uncontrolled terms: Arrhenius equation - Changing trends - Effects of temperature - Film materials - Linear relationships - Modified atmosphere packaging - Permeability coefficients
Classification code: 815.1.1 Organic Polymers - 802.1 Chemical Plants and Equipment - 632.1 Hydraulics - 931.2 Physical Properties of Gases, Liquids and Solids - 631.1 Fluid Flow, General - 443.1 Atmospheric Properties - 421 Strength of Building Materials; Mechanical Properties - 462.1 Biomedical Equipment, General
DOI: 10.3969/j.issn.1000-1298.2010.02.023
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 3. Accession number: 20101512841345
Title: Cascade tracking control for AGV based on Kalman filter
Authors: Yin, Xiaohong1 ; Zhao, Han1 ; Wu, Yanming1 ; Xiong, Dan1
Author affiliation: 1 School of Machinery and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Zhao, H. (hanzhao@mail.hf.ah.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 180-184
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 trajectory tracking control problem for the kinematics model of three-wheeled AGV with nonholonomic constraint, a cascade tracking control algorithm was proposed. The algorithm broke the system down into two nonlinear time-varying systems and finally realized the global asymptotic stability of the control system using cascade control method and state derivative feedback control method. Furthermore, the noise problem of state estimation was solved successfully by using a Kalman filter, which improved the localization precision and enhanced the control effectiveness. The designed control algorithm is of strong robustness and generality for kinematics model of other wheeled mobile robots. Computer simulation results showed that the system can be stable in a short time which verifies its effectiveness.
Number of references: 10
Main heading: Cascade control systems
Controlled terms: Algorithms - Asymptotic stability - Computer simulation - Control system stability - Feedback - Kalman filters - Kinematics - Mathematical models - Mobile robots - Navigation - Noise pollution - Nonlinear feedback - State feedback - Time varying systems
Uncontrolled terms: AGV - Cascade control - Control algorithms - Control effectiveness - Global asymptotic stability - Kinematics models - Noise problems - Non holonomic constraint - Nonlinear time varying systems - State-derivative feedback control - Tracking control algorithms - Tracking controls - Trajectory tracking - Trajectory tracking control - Wheeled mobile robot
Classification code: 961 Systems Science - 731.1 Control Systems - 731.4 System Stability - 731.5 Robotics - 731.6 Robot Applications - 751.4 Acoustic Noise - 921 Mathematics - 921.6 Numerical Methods - 931.1 Mechanics - 723.5 Computer Applications - 431.5 Air Navigation and Traffic Control - 434.4 Waterway Navigation - 461.7 Health Care - 723 Computer Software, Data Handling and Applications - 655.1 Spacecraft, General - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 703.2 Electric Filters
DOI: 10.3969/j.issn.1000-1298.2010.02.036
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 4. Accession number: 20101512841311
Title: Experiment on the performance of steam reforming by dimethyl-ether
Authors: Zhang, Wugao1 ; Lu, Weidong1 ; Yan, Ying1
Author affiliation: 1 School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Zhang, W. (zhangwg@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 6-9 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: The performance of stream reforming for rich hydrogen co-gas by dimethyl-ether (DME) was experimental studied. The multiunit catalyst which was formed with copper-based catalyst (named CNZ1) and aluminium/zinc based molecular sieve (named HZSM5) by means of mechanical mixing, was used. The parameters such as flow rate of reactants including water steam and DME, the reaction temperature as well as the catalyst amount influence on the reforming performance were investigated. Results show that under normal pressure, when DME flow rate increases, the yield of hydrogen increases at the beginning and then decreases. At the range from 250°C to 500°C, the production rate of hydrogen increases with the increasing of temperature, and the maximum conversion rate of DME almost reaches 100%; the volume fraction of carbon monoxide decreases as the reaction temperature rises; although larger amount of catalyst has no influences on hydrogen production rate under the test conditions, it can improve effectively the conversion rate of DME.
Number of references: 6
Main heading: Hydrogen production
Controlled terms: Carbon monoxide - Catalyst activity - Ethers - Molecular sieves - Organic compounds - Sieves - Steam - Steam engineering - Synthetic fuels
Uncontrolled terms: Conversion rates - Copper-based catalysts - Dimethyl ethers - Hydrogen production rate - Mechanical mixing - Normal pressure - Production rates - Reaction temperature - Steam reforming - Stream reforming - Test condition - Water steam
Classification code: 901 Engineering Profession - 641.1 Thermodynamics - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 617.3 Steam Engines - 405.1 Construction Equipment - 502.2 Mine and Quarry Equipment - 522 Gas Fuels - 617.2 Steam Turbines - 523 Liquid Fuels - 605 Small Tools and Hardware - 614 Steam Power Plants - 524 Solid Fuels
DOI: 10.3969/j.issn.1000-1298.2010.02.002
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 5. Accession number: 20101512841353
Title: Experiment on silicon wafer edge hybrid polishing of ultrasonic vibration and chemical mechanical
Authors: Liu, Renxin1 ; Yang, Weiping1 ; Wu, Yongbo2
Author affiliation: 1 College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China
2 Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Akita 015-0055, Japan
Corresponding author: Yang, W. (wp_yang1@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 221-226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A newly hybrid technique for silicon wafer edge polishing of ultrasonic-vibration and chemical mechanical was presented, and the design, performance testing for the polishing tools, were discussed along with establishment of experimental system for the hybrid polishing. And then, the traditional chemical mechanical polishing, as well as the polishing tool with different forms of ultrasonic-vibration was investigated on polish for the edge of silicon wafer. Experimental results showed that in the same polishing condition, the hybrid polishing of ultrasonic-elliptic-vibration and chemical mechanical has a favorable effect to improve wafer edge polishing. As ultrasonic-elliptic-vibration is put in polishing tool, the roughness Ra of silicon wafer polished surface decreases from the traditional polishing method of 0.059μm down to the 0.043μm, material removal increase by 22%, and the polished surface morphology is significantly improved.
Number of references: 13
Main heading: Chemical polishing
Controlled terms: Chemical mechanical polishing - Geometry - Polishing - Semiconducting silicon compounds - Silicon wafers - Ultrasonic effects - Ultrasonic testing - Ultrasonics - Vibrations (mechanical)
Uncontrolled terms: Experimental system - Hybrid polishing - Hybrid techniques - Material removal - Performance testing - Polished surfaces - Polishing tool - Ultrasonic-vibration - Wafer edge
Classification code: 931.1 Mechanics - 921 Mathematics - 802.3 Chemical Operations - 753.3 Ultrasonic Applications - 753.1 Ultrasonic Waves - 714.2 Semiconductor Devices and Integrated Circuits - 712.1.2 Compound Semiconducting Materials - 712.1.1 Single Element Semiconducting Materials - 604.2 Machining Operations - 423.2 Test Methods - 422.2 Test Methods
DOI: 10.3969/j.issn.1000-1298.2010.02.044
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 6. Accession number: 20101512841328
Title: Near-infrared reflectance spectroscopy for total nutrient analysis in organic fertilizer using linear support vector machine
Authors: Huang, Guangqun1 ; Wang, Xiaoyan2 ; Han, Lujia1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Han, L. (hanlj@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 93-98
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 method was explored to predict the total nutrient content in organic fertilizer products using near-infrared reflectance spectroscopy (NIRS) with linear support vector machine regression (SVR), compared with partial least-squares regression (PLSR). 120 commercial organic fertilizer samples were collected from 22 provinces in China. Spectra of orient and dried (passed 1 mm screen) samples were scanned with a SPECTRUM ONE NTS (PerkinElmer, New Jersey, USA) from 10000 to 4000cm-1, respectively. NIRSPLSR models for total nutrient in organic fertilizer products samples on orient and dried basis were developed with the following results: the determination coefficient of validation (R2v), the standard error of prediction (SEP) and RPD (SD/SEP) on orient and dried basis were 0.96, 7.95g/kg, 2.47 and 0.93, 8.02g/kg, 3.58, respectively. The validation results of NIRS-SVR model for total nutrient content on dried basis were R2v 0.93, SEP 7.38g/kg and RPD 3.88.Results showed the feasibility and potential of NIRS to predict total nutrient content in organic fertilizer products, and NIRS-SVR method on dried basis is the best choice.
Number of references: 19
Main heading: Fertilizers
Controlled terms: Forecasting - Forestry - Infrared devices - Infrared spectroscopy - Infrared transmission - Nutrients - Probability distributions - Reflection - Support vector machines - Vectors
Uncontrolled terms: Best choice - Determination coefficients - Linear Support Vector Machines - Near-infrared reflectance spectroscopy - New Jersey , USA - Nutrient contents - Organic fertilizers - Partial least squares - Partial least-squares regression - Perkinelmer - Standard error of prediction - Validation results
Classification code: 912.2 Management - 921 Mathematics - 921.1 Algebra - 822.3 Food Products - 922.1 Probability Theory - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements - 922.2 Mathematical Statistics - 821.2 Agricultural Chemicals - 461.9 Biology - 711 Electromagnetic Waves - 723 Computer Software, Data Handling and Applications - 454.3 Ecology and Ecosystems - 741.1 Light/Optics - 804 Chemical Products Generally - 821.0 Woodlands and Forestry - 741.3 Optical Devices and Systems
DOI: 10.3969/j.issn.1000-1298.2010.02.019
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 7. Accession number: 20101512841326
Title: Solid design and experiment of forage harvester
Authors: Che, Gang1 ; Wan, Lin1 ; Zhang, Wei1 ; Wang, Chun1 ; Ma, Yongcai1
Author affiliation: 1 College of Engineering, Heilongjiang August First Land Reclamation University, Daqing 163319, China
Corresponding author: Che, G. (chegang180@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 82-86
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the related Pro/E software and the basic principle of forage harvester, the design of a rubbing forage harvester was coordinately combined double-disk saw tooth cutter, forced and sequential feeding device with the wheel-type cutter-header. A virtual assembly model had been established, and model machine had been manufactured according to the fitted position. The effects of structure parameters and mobile parameters of cutter on the working performance have been analyzed, and determined reasonable working parameter on the basis of indoor service test. Experimental results show that 4QR type of rubbing forage harvester meets design needs completely, quality silage crops and high productivity.
Number of references: 8
Main heading: Harvesters
Controlled terms: Design - Experiments
Uncontrolled terms: Basic principles - Forage harvester - High productivity - Model machine - Pro/E software - Rubbing - Saw-tooth - Sequential feeding - Structure parameter - Virtual assembly model - Wheel-type - Working parameters
Classification code: 408 Structural Design - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research - 902.1 Engineering Graphics
DOI: 10.3969/j.issn.1000-1298.2010.02.017
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 8. Accession number: 20101512841331
Title: Effect of UV-C treatment on post-harvest storage quality of shiitake mushrooms
Authors: Jiang, Tianjia1 ; Lu, Xianying1 ; Jiang, Zhenhui1 ; Pei, Mingli1 ; Ying, Tiejin1
Author affiliation: 1 School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author: Ying, T. (tjying@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 108-112
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The effects of different dose UV-C treatments on main physiological and quality parameters of shiitake mushrooms during storage were investigated. The experimental results indicated that 2.0kJ/m2 and 4.0kJ/m2 UV-C treatment significantly inhibits the increase in firmness and malonaldehyde (MDA) contents, delays the decrease in reducing sugar and vitamin C contents, and promotes synthesis and accumulation of flavonoid, therefore maintaining better quality, nutrition and extending the shelf life of shiitake mushrooms compared with the control treatment. The results suggested that UV-C treatment has the potential to apply on extending the shelf life of shiitake mushrooms.
Number of references: 16
Main heading: Fungi
Controlled terms: Aldehydes - Physiological models - Sugar (sucrose)
Uncontrolled terms: Flavonoids - Malonaldehyde - Post-harvest storage - Quality parameters - Reducing sugars - Shelf life - Vitamin C
Classification code: 461.1 Biomedical Engineering - 461.9 Biology - 801.2 Biochemistry - 804.1 Organic Compounds - 822.3 Food Products
DOI: 10.3969/j.issn.1000-1298.2010.02.022
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 9. Accession number: 20101512841351
Title: Analysis of position and singularity of a parallel mechanism with three degrees of freedom
Authors: Wu, Xin1 ; Chen, Meili1 ; Zhang, Yanbin2
Author affiliation: 1 School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China
2 School of Architectural Engineering, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author: Wu, X. (wuxin@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 208-213
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 single-opened-chain (SOC) unit theory, a new parallel mechanism with two translational and one rotational (2T1R) degrees of freedom was put forward. First, the degrees of freedom and the motion output characteristic were analyzed, and then both the forward and the inverse analytical solutions of the moving platform's position were obtained. The singular configurations of the mechanism were also discussed; the change of the position with respect to the pose angle in singular configuration was obtained through programming with Matlab software. All the above analysis provides foundation for the further research on properties and dynamics of the mechanism.
Number of references: 10
Main heading: Mechanisms
Controlled terms: MATLAB - Mechanics
Uncontrolled terms: Analytical solutions - Degrees of freedom - Matlab- software - Moving platform - Output characteristics - Parallel mechanisms - Position analysis - Single-opened-chain - Singular configurations - Three degrees of freedom
Classification code: 601.3 Mechanisms - 723.1.1 Computer Programming Languages - 723.5 Computer Applications - 921 Mathematics - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.02.042
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 10. Accession number: 20101512841322
Title: CFD simulation and experimental verification of droplet dispersion of air-assisted orchard sprayer
Authors: Qi, Lijun1 ; Zhao, Yaqing1 ; Wang, Jun2 ; Ji, Ronghua3 ; Mang, Lu1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
3 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Qi, L. (qilijun@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 62-67
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to investigate the droplet distribution of air-assisted orchard sprayer, a model for Hardi LB255 air-assisted sprayer was developed based on CFD technology. The 2-D boundary and the model variables were defined to correspond to the tested sprayer. The trajectory of air-assisted droplets and the distribution of droplets in different layers were simulated. The relative errors of simulated results could show the droplet distribution accurately with the range less than 240 cm from the fan.
Number of references: 10
Main heading: Drop formation
Controlled terms: Computer crime - Computer simulation - Orchards
Uncontrolled terms: Air-assisted sprayer - CFD - CFD simulations - Droplet dispersion - Droplet distribution - Experimental verification - Model variables - Relative errors - Simulated results
Classification code: 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 821.3 Agricultural Methods - 902.3 Legal Aspects - 931.2 Physical Properties of Gases, Liquids and Solids
DOI: 10.3969/j.issn.1000-1298.2010.02.013
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 11. Accession number: 20101512841352
Title: Automated modeling for kinematic analysis of planar linkages based on link units
Authors: Wang, Chengzhi1 ; Huang, Kaixuan2 ; Zhang, Quanming1 ; Fang, Fang1
Author affiliation: 1 School of Mechanical Engineering, Jimei University, Xiamen 361021, China
2 Marine Engineering Institute, Jimei University, Xiamen 361021, China
Corresponding author: Wang, C. (wcz3@21cn.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 214-220 226
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: Through the kinematic analysis approach of mechanism with closed loop vector equations, three kinds of link units, including link vector unit, Jacobian unit and Jacobian differentiation unit, were proposed. Since they are only relative to sizes and shapes of link, these units can be programmed with link drawing subprograms together. Using the effect factors, the units were combined together to build Jacobian matrix and differentiation Jacobian matrix of whole mechanism, and a new automated modeling approach to analyzing planar linkages motion was gotten. This paper also discussed general method analyzing closed loops in complex linkages, as well as algorithm for automated modeling and kinematic analysis. Programming the kinematic analysis and testing with many planar linkages showed that the approach is suitable for automated solving kinematics of complex mechanism due to its modular property.
Number of references: 12
Main heading: Kinematics
Controlled terms: Automation - Computer simulation - Equations of motion
Uncontrolled terms: Automated modeling - Closed loops - Complex linkages - Complex mechanisms - Computer modeling - Effect factors - General method - Jacobians - Kinematic Analysis - Link vectors - Planar linkage - Subprograms - Vector equation
Classification code: 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 732 Control Devices - 921.2 Calculus - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.02.043
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 12. Accession number: 20101512841348
Title: Modified differential evolution and its application
Authors: Lu, Qingbo1, 2 ; Zhang, Xueliang1 ; Wen, Shuhua1 ; Wu, Meixian1 ; Lan, Guosheng1 ; Liu, Liqin1
Author affiliation: 1 College of Mechanical Electronic Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2 Department of Electrical and Electronic Engineering, Zhengzhou Technical College, Zhengzhou 450121, China
Corresponding author: Zhang, X. (zhang_xue_l@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 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: Differential evolution (DE) is one kind of evolution algorithm based on difference of individuals. DE has exhibited good performance on optimization. However, for the high dimension and perplexed function, the algorithm is apt to fall into premature convergence, its performance is strongly influenced by the value of each strategy parameter including scale factor. Therefore, a modified differential evolution algorithm (MDE) was proposed to solve the optimization problems. First, the scale factor was randomly initialized and calculated by chaos each generation, which decreases the participation of user and balances the convergency speed and global optimal capability. Next, disaster factor was introduced to eliminate the individual of a small probability, along with a new individual generating, which can increase the diversity of population and global optimal capability. Simulated results and engineering optimization design example showed that MDE outperforms standard DE in global optimal capability.
Number of references: 17
Main heading: Evolutionary algorithms
Controlled terms: Convergence of numerical methods - Optimization
Uncontrolled terms: Choas - Convergency - Differential Evolution - Engineering optimization design - Evolution algorithms - High dimensions - Modified differential evolution - Optimal capability - Optimization problems - Premature convergence - Scale Factor - Simulated results
Classification code: 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.5 Optimization Techniques - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.02.039
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 13. Accession number: 20101512841343
Title: Development of a 3-dimension vision sensor in apple harvesting robot
Authors: Liu, Zhaoxiang1 ; Liu, Gang1 ; Qiao, Jun2
Author affiliation: 1 Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
2 Network Centre, China Agricultural University, Beijing 100083, China
Corresponding author: Liu, G. (pac@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 171-175
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 3-dimension vision sensor for red Fuji apple harvesting robot was presented. Lasers with sensitive wavelength were selected as active lamp-house according to the reflectance characteristic of apple plant, to scan apple plant under the drive of stepping motors. And recognition of apples depended on laser reflectance difference of plant, positioning of apples was accomplished based on triangulation. ARM7 microchip LPC2114 was used as the CPU, PSD was used as the signal receiving sensor. In order to eliminate the noise of environment, optimal design of circuit and mechanism was considered. The result of experiment indicated that the output signal of system was stable ranging from 150mm to 750mm, with the maximum error of 13mm.
Number of references: 11
Main heading: Fruits
Controlled terms: Computer vision - Harvesting - Machine design - Reflection - Robots - Sensors - Spectrum analysis - Spectrum analyzers - Triangulation
Uncontrolled terms: 3-dimension - Fuji apple - Harvesting robot - Laser reflectances - Machine vision - Maximum error - Optimal design - Output signal - Reflectance characteristics - Sensitive wavelengths - Signal receiving - Spectral analysis - Vision sensors
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 821.3 Agricultural Methods - 821.4 Agricultural Products - 921 Mathematics - 922.2 Mathematical Statistics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 741.2 Vision - 405.3 Surveying - 601 Mechanical Design - 711 Electromagnetic Waves - 741.1 Light/Optics - 723.5 Computer Applications - 731.6 Robot Applications - 732.2 Control Instrumentation - 731.5 Robotics
DOI: 10.3969/j.issn.1000-1298.2010.02.034
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 14. Accession number: 20101512841336
Title: Outlier sample analysis on near infrared spectroscopy determination for apple interior quality
Authors: Shi, Bolin1, 2 ; Zhao, Lei2 ; Liu, Wen2 ; Wang, Houyin2 ;Zhu, Dazhou3 ; Yin, Jingyuan1
Author affiliation: 1 School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
2 Food and Agriculture Standardization Institute, China National Institute of Standardization, Beijing 100088, China
3 Nation Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author: Zhao, L. (shibl@cnis.gov.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 132-137
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 interior quality of Shanxi 'Fuji' apple including soluble solid content (SSC), sugar content (SC), titrated acidity (TC) and firmness was determined by acousto-optic tunable filter (AOTF) near infrared (NIR) apparatus. The dubitable outlier samples were analyzed by Cook values, Mahalanobis, leverage and studentized residual. In order to avoiding falsely estimating outlier samples, twice-detection diagnosis method was applied to keep more valid samples. The estimated number of outlier samples for SSC, SC, TC and firmness were 11, 11, 11 and 6, respectively. After outlier samples elimination, the correlation coefficient (r) of SSC, SC, TC and firmness models were improved from 0.868, 0.791, 0.443, 0.693 to 0.904, 0.849, 0.501, 0.718, respectively. The RMSEC of SSC, SC, TC and firmness were decreased from 0.882 °Brix, 9.213g/L, 0.805g/L, 0.105MPa to 0.733 ° Brix, 7.300g/L, 0.687g/L, 0.097MPa,respectively. Moreover, the presented models of apple quality became more robust and stable.
Number of references: 14
Main heading: Infrared spectroscopy
Controlled terms: Infrared devices - Near infrared spectroscopy - Sugar (sucrose) - Thermal conductivity
Uncontrolled terms: Acousto-optic tunable filters - Correlation coefficient - Diagnosis methods - Mahalanobis - Near infra red - Non-destructive technique - Outlier samples - Soluble solid content - Sugar content
Classification code: 941.4 Optical Variables Measurements - 931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 822.3 Food Products - 801 Chemistry - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 641.2 Heat Transfer - 641.1 Thermodynamics
DOI: 10.3969/j.issn.1000-1298.2010.02.027
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 15. Accession number: 20101512841349
Title: Improved Wigner Ville distribution based on signal decomposition and modified magnitude group delay
Authors: Ding, Jianming1 ; Lin, Jianhui1 ; Yang, Qiang1 ; Chen, Zheming1
Author affiliation: 1 State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
Corresponding author: Lin, J. (linjhyz@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 198-202
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 method was proposed for improving the performance of the Wigner Ville distribution. The WVDs of the subbands gotten by DCHWT (discrete cosine harmonic wavelet transform), was concatenated to obtain an overall WVD, significantly free from the existence of cross-terms was applied to reduce the Gibbs effect from the truncation of the Wigner Ville distribution kernel. Examples of application demonstrated that this proposed method obeys the desirable properties of time-frequency resolution and strikingly reduces cross-terms. This method can realize the simple and fast algorithm through DCT discrete cosine transform and is suitable for joint time-frequency analysis of non-stationary engineering signal.
Number of references: 7
Main heading: Signal processing
Controlled terms: Cosine transforms - Discrete cosine transforms - Group delay - Wavelet transforms
Uncontrolled terms: Cross-terms - DCT-discrete cosine transform - Discrete cosines - Fast algorithms - Harmonic wavelet transform - Joint time-frequency analysis - Nonstationary - Signal decomposition - Sub-bands - Time-frequency resolution - Wigner-Ville distribution
Classification code: 703.1 Electric Networks - 716.1 Information Theory and Signal Processing - 921.3 Mathematical Transformations
DOI: 10.3969/j.issn.1000-1298.2010.02.040
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 16. Accession number: 20101512841327
Title: Study on structure and CO2 gasification reactivity of acid hydrolysis residue char
Authors: Zhang, Bin1, 2 ; Yin, Xiuli1 ; Wu, Chuangzhi1 ; Qiu, Zejing1, 2 ; Ma, Longlong1 ; Wu, Shubin3
Author affiliation: 1 The Renewable Energy and Gas Hydrate Key Laboratory, Chinese Academy of Sciences, Guangzhou 510640, China
2 Graduate University, Chinese Academy of Sciences, Beijing100049, China
3 State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
Corresponding author: Yin, X. (xlyin@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 87-92
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A typical acid hydrolysis residue (AHR) was adopted as material to make char in a tube reactor with low heating rate. Proximate analysis was carried out to show component differences between AHR and the char. The crystal structure and morphology of char samples were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM), and were analyzed to explain changes of CO2 gasification reactivity. The CO2 gasification reactivity of acid hydrolysis residue was studied in the view of the rate of weight loss by a thermal gravimetric analyzer. The results showed carbonization increased as pyrolysis temperature rised, increase of final pyrolysis temperature enhanced the degree of crystal-like ordering, and the degree of char deconstruction increased with final pyrolysis temperature increasing. The CO2 gasification reactivity showed a decrease tendency when final pyrolysis temperature increases.
Number of references: 20
Main heading: Crystal structure
Controlled terms: Acids - Carbonization - Gas generators - Gasification - Hydrolysis - Pyrolysis - Scanning electron microscopy - Thermogravimetric analysis - X ray diffraction - X ray diffraction analysis
Uncontrolled terms: A-thermal - Acid hydrolysis - Crystal structure and morphology - Gasification reactivity - Proximate analysis - Pyrolysis temperature - Residue char - SEM - Tube reactors - Weight loss - X-ray diffractometry
Classification code: 933.1.1 Crystal Lattice - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 802.1 Chemical Plants and Equipment - 801 Chemistry - 741.1 Light/Optics - 531.2 Metallography - 522 Gas Fuels - 445.1 Water Treatment Techniques - 801.4 Physical Chemistry
DOI: 10.3969/j.issn.1000-1298.2010.02.018
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 17. Accession number: 20101512841337
Title: Region selecting methods of near infrared wavelength based on wavelet transform
Authors: Zhang, Qiaojie1 ; Zhang, Jun2
Author affiliation: 1 College of Automation, Beijing Information Science and Technology University, Beijing 100192, China
2 College of Information, Beijing Union University, Beijing 100101, China
Corresponding author: Zhang, Q. (qiaojiezhang@yahoo.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 138-142
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: An efficient method was presented to select wavelength regions of NIR(near infrared spectroscopy) based on WT(wavelet transform) for building a PLS(partial least squares) calibration model. Wavelet approximation coefficient(WAC) is similar matrix of original NIR. By linking the correlation coefficients of the optimal WAC with original NIR data, a research space with the all combinations of strong correlativity wavelength was selected as final wavelength regions to build a PLS calibration model of NIR. This selecting method considered the influence of density matrix on wavelength selection, filtered wavelet detail coefficient entirely, and avoided the interference of high frequency noise. The running time of building model was reduced enormously so that the final model is of higher accuracy. Compared with other traditional wavelength selecting method, This method is validated in the measurement of rice apparent amylose content by NIR. The apparent amylase content test results showed that the number of wavelengths for building the models can be reduced to 20% of the original method, the calibration model and the prediction precision are greatly improved by wavelet transform algorithm.
Number of references: 10
Main heading: Infrared devices
Controlled terms: Calibration - Infrared spectroscopy - Near infrared spectroscopy - Wavelength - Wavelet transforms
Uncontrolled terms: Amylose - Amylose content - Building model - Calibration model - Correlation coefficient - Detail coefficients - Efficient method - High-frequency noise - Influence of density - matrix - Near-infrared wavelength - NIR wavelength - Partial least squares - PLS calibration - Prediction precision - Running time - Test results - Wavelength regions - Wavelength selection - Wavelet approximations - Wavelet transform algorithms
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921.3 Mathematical Transformations - 711 Electromagnetic Waves - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 751.1 Acoustic Waves - 753.1 Ultrasonic Waves - 801 Chemistry - 902.2 Codes and Standards
DOI: 10.3969/j.issn.1000-1298.2010.02.028
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 18. Accession number: 20101512841339
Title: Damping of a multidimensional vibration isolation device for transporting eggs
Authors: Yu, Daguo1, 2 ; Ma, Lüzhong2 ; Zhao, Shouming2 ; Xun, Qunde2
Author affiliation: 1 School of Mechanical Engineering and Automation, North University of China, Taiyuan 030051, China
2 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Yu, D. (yudaguo12@qq.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 148-150 163
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: Damping of a multidimensional vibration isolation device for transporting eggs was discussed. The air cylinder was used as a damper and its coefficient of damping was measured with CNC lathe. The accelerations of up-platform with different coefficients of damping were measured and compared by means of ADAMS simulation and experiments. Studies indicated that it's inappropriate to design the damping of the device according to the classic amplitude-frequency chart. It was proposed that the damping should be decided according to performance index of transient response of second order system. The conclusion showed that the multidimensional vibration isolation device for transporting eggs isolates vibration present a favorable effect when the damping ratio of 0.707 is adopted for the coefficient of damping of the air cylinder.
Number of references: 9
Main heading: Damping
Controlled terms: Cylinders (shapes) - Steel bridges
Uncontrolled terms: Adams simulation - Air cylinder - Amplitude-frequency - CNC lathe - Damping ratio - Egg - Multidimensional vibration isolation - Multidimensional vibrations - Performance indices - Second-order systemss - Transient response
Classification code: 401.1 Bridges - 408.2 Structural Members and Shapes - 545.3 Steel - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.02.030
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 19. Accession number: 20101512841312
Title: Experimental study on fuel spray characteristics of stirling engine
Authors: Hu, Huaili1 ; Zhang, Wugao1 ; Jin, Yongxing2 ; Guo, Xiaoning2 ; Gu, Genxiang2
Author affiliation: 1 School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2 Shanghai MicroPowers Co., Ltd., Shanghai 201203, China
Corresponding author: Zhang, W. (zhangwg@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 10-16
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: The formation processes of fuel spray of Stirling engine under different back pressure were investigated by using high-speed camera. And the influence of several parameters, such as back pressure in the combustion chamber, the flow-rate as well as the diameter of spiral channel, on the spray performance was analyzed. Results showed that: back pressure has great impact on the formation process of fuel spray; the fuel penetration and spray angle increase with the increase of fuel flow rate; the penetration increases and the spray angle decreases as the back pressure in the combustion chamber increases; at the same flow rate, with the increase of diameter of spiral channel, the penetration increases while the spray angle decreases.
Number of references: 13
Main heading: Spray nozzles
Controlled terms: Combustion - Combustion chambers - Fuels - Photovoltaic effects - Stirling engines
Uncontrolled terms: Back pressures - Experimental studies - Formation process - Fuel flow rates - Fuel spray characteristics - Fuel sprays - Spiral channel - Spray angle - Spray performance
Classification code: 712.1 Semiconducting Materials - 701.1 Electricity: Basic Concepts and Phenomena - 654.2 Rocket Engines - 641.1 Thermodynamics - 741.1 Light/Optics - 631.1 Fluid Flow, General - 523 Liquid Fuels - 522 Gas Fuels - 521.1 Fuel Combustion - 524 Solid Fuels
DOI: 10.3969/j.issn.1000-1298.2010.02.003
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 20. Accession number: 20101512841350
Title: Fault feature extraction of rolling element bearing based on morphological undecimated wavelet decomposition
Authors: Huang, Bingfeng1 ; Shen, Lu2 ; Zhou, Xiaojun2 ; Liu, Li3
Author affiliation: 1 Department of Automobile Engineering, Hubei University of Automotive Technology, Shiyan 442002, China
2 Institute of Modern Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China
3 Inner Mongolia First Machinery (Group) DADI Engineering Co., Ltd., Baotou 014032, China
Corresponding author: Zhou, X. (cmeesky@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 203-207
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: Fault feature was always hidden by strong noise background in rolling element bearing fault signal. Based on morphological undecimated wavelet decomposition(MUWD), a novel approach was proposed to extract rolling element bearing fault feature. MUWD possess both the characteristic of morphological filter in morphology and multiresolution in wavelet transform. Signal length was maintained invariable and information loss could be avoided in MUWD. Multi-scale MUWD was developed based on the characteristic of impulse feature extraction in difference morphological filter. The method was used to extract impulse feature in bearing fault signal. Experiment results showed that the presented method can achieve a better performance than traditional wavelet packet. MUWD algorithm includes addition, subtraction, maximum and minimum operations, and does not involve multiplication and division. It is suitable for on-line monitoring and fault diagnosis of bearing.
Number of references: 12
Main heading: Feature extraction
Controlled terms: Bearings (structural) - Failure analysis - Rolling - Wavelet decomposition
Uncontrolled terms: Bearing fault - Fault diagnosis - Fault feature - Information loss - Morphological filters - Multi-resolutions - Multiscales - Online monitoring - Rolling Element Bearing - Signal length - Traditional wavelet packet - Undecimated wavelet decomposition
Classification code: 921.3 Mathematical Transformations - 921 Mathematics - 818.3 Rubber and Elastomer Processing - 751.1 Acoustic Waves - 741.1 Light/Optics - 723.5 Computer Applications - 716 Telecommunication; Radar, Radio and Television - 535.1 Metal Rolling - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 401.1 Bridges
DOI: 10.3969/j.issn.1000-1298.2010.02.041
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 21. Accession number: 20101512841310
Title: Multi-objective optimizing design for intake system based on DOE method
Authors: Zhao, Lifeng1 ; Li, Yunqing1 ; Cheng, Chuansong1
Author affiliation: 1 School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
Corresponding author: Zhao, L. (lifong.zhao@gmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 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: On the integrated optimization plat, the workflow of intake system optimization was constructed based on Boost which is the software of engine cycle simulation. The model was verified by experiments. At the declared speed, the design variables are geometric parameters (intake pipe length, pipe diameter, volume of resonator ) and spark advanced angle, AF rate. The engine torque and fuel consumption rate were optimized by using the DOE tests. The results showed that the length of intake pipes has a special influence on full load velocity characteristic of engine. The workflow provides an efficient method to intake system optimization.
Number of references: 7
Main heading: Multiobjective optimization
Controlled terms: Computer software - Density (optical) - Design - Diesel engines - Diffractive optical elements - Electric sparks - Engines - Gasoline - Intake systems - Management - Pipe
Uncontrolled terms: Design variables - DOE - Efficient method - Engine cycle simulation - Engine torque - Fuel consumption rates - Full-load - Gasoline engines - Geometric parameter - Intake pipe - Integrated optimization - Multi objective - Optimizing design - Pipe diameter
Classification code: 701.1 Electricity: Basic Concepts and Phenomena - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 902.1 Engineering Graphics - 912.2 Management - 921.5 Optimization Techniques - 654.2 Rocket Engines - 408 Structural Design - 523 Liquid Fuels - 612 Engines - 612.2 Diesel Engines - 617.3 Steam Engines - 619.1 Pipe, Piping and Pipelines - 631.1 Fluid Flow, General
DOI: 10.3969/j.issn.1000.1298.2010.02.001
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 22. Accession number: 20101512841314
Title: Effect of fuel supply loop for EUP's cyclic variation characteristics
Authors: Qiu, Tao1 ; Yin, Wenhui1 ; Liu, Xinghua1 ; Lu, Ying1 ; Liu, Yongfeng2
Author affiliation: 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2 School of Mechanical-electronic and Automobile Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Corresponding author: Qiu, T. (qiutaode@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 21-24
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: By experimental studies for the single EUP on test bench, the low fuel supply pressures near the EUP and the high pressures in high pressure fuel pipe at different cam speeds were acquired. The high and low pressure curves of the EUP's cyclic variation circles were analyzed. Test results showed that when the cam shaft speed is very high, the supply pressure instantaneous decreased as the plunger move downward, and the pressure wave which results from the backward flow of high pressure fuel appears in low fuel supply loop. The above two factors cause the negative pressure at low fuel supply loop, and leads to the cyclic variation. Increase in fuel supply pressure and the fuel supply pipe line's flow area is advantageous in reduction the cyclic variation of EUP.
Number of references: 8
Main heading: Fuels
Controlled terms: Cams - Fuel injection - Mining - Pipe - Pumps
Uncontrolled terms: Backward flow - Cyclic variations - Electronic unit pump - Experimental studies - Flow area - Fuel injection systems - Fuel pipes - Fuel supply - Fuel supply pressure - High pressure - Low pressures - Negative pressures - Pressure waves - Supply pressure - Test benches - Test results
Classification code: 618.2 Pumps - 601.3 Mechanisms - 524 Solid Fuels - 619.1 Pipe, Piping and Pipelines - 523 Liquid Fuels - 521 Fuel Combustion and Flame Research - 502.1 Mine and Quarry Operations - 522 Gas Fuels
DOI: 10.3969/j.issn.1000-1298.2010.02.005
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 23. Accession number: 20101512841319
Title: Suitability regionalization of conservation tillage based on GIS
Authors: Jiao, Weihua1 ; He, Yingbin2 ; Zhang, Xiaoshuan3 ; Fu, Zetian4 ; Gao, Wangsheng5
Author affiliation: 1 College of Economics and Management, China Agricultural University, Beijing 100083, China
2 Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
3 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
4 College of Engineering, China Agricultural University, Beijing 100083, China
5 College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author: He, Y. (wshgao@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 47-51 67
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Now conservation tillage can not be applied on a large scale in China due to the diversity of region and the various types of this technology. Aiming at the problem, the index system of suitability regionalization for no-tillage which belongs to conservation tillage was developed. And then case study was carried out in Wuchuan County where the ecological environment deteriorated gradually. GIS was applied, combined with such methods as AHP weight, cluster analysis, and so on, to divide Wuchuan County into three parts. Finally, the division results are proved to be reasonable. This will undoubtedly provide some references for the suitability regionalization research of other conservation tillage types.
Number of references: 21
Main heading: Agriculture
Controlled terms: Agricultural machinery - Cluster analysis - Geographic information systems - Soil conservation
Uncontrolled terms: Conservation tillage - Ecological environments - Index systems - No tillage
Classification code: 903.3 Information Retrieval and Use - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 922 Statistical Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723 Computer Software, Data Handling and Applications - 483.1 Soils and Soil Mechanics - 723.3 Database Systems
DOI: 10.3969/j.issn.1000-1298.2010.02.010
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 24. Accession number: 20101512841321
Title: Research on visualization of pesticide mass concentration in airtight awning space
Authors: Qiu, Baijing1 ; Li, Chengquan1 ; Tang, Bomin2 ; Zhang, Zhenlei1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
2 Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author: Qiu, B. (qbj@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 58-61
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 problem of mass concentration of pesticide fog after application in airtight space, an improved container collecting the air samples was used at different locations in the level of 1.5m from ground, and curved surface of mass concentration of pesticide fog was established based on cubic spline interpolation. It was showed that the pesticide mass concentration attains maximum at 10-12m in the front of the nozzle, and the effective regional of cold aerosol sprayer is 42m, from 10m in the back of the nozzle to 32m in the front of the nozzle, in length; and the pesticide mass concentration was lower in the middle of airtight space than the sides of it, in width.
Number of references: 10
Main heading: Interpolation
Controlled terms: Concentration (process) - Pesticides - Splines - Spray nozzles - Visualization
Uncontrolled terms: Air samples - Cubic spline interpolation - Curved surfaces - Mass concentration
Classification code: 921.6 Numerical Methods - 902.1 Engineering Graphics - 821.2 Agricultural Chemicals - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 631.1 Fluid Flow, General - 601.2 Machine Components
DOI: 10.3969/j.issn.1000-1298.2010.02.012
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 25. Accession number: 20101512841340
Title: Study on preparation of protease microcapsule and its application in cheese ripening
Authors: Zhang, Na1 ; Zhao, Xinhuai1
Author affiliation: 1 Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Zhao, X. (zhaoxh@mail.neau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 151-156
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Gelatin and arabic gum were used as the wall material to prepare protease microcapsule with freeze drying technique through Box-Behnken design and response surface methodology. The microencapsulated protease were added to cheese to determine the ratios of pH 4.6 soluble nitrogen to total nitrogen and water soluble nitrogen to total nitrogen, as well as of 12% TCA soluble nitrogen to total nitrogen in ripened cheese. SDSPAGE analysis, texture analysis and scanning electron microscope examination were also employed to analyze ripened cheese. It was shown from the analysis results that the optimum conditions for protease microcapsule preparation is that the concentrations of gelatin and arabic gum are 3.8% and 3.7% respectively, core material (protease) is 6.4mg/(100mL), and microencapsulation efficiency is 93.4%. The ratios of pH 4.6 soluble nitrogen to total nitrogen, water soluble nitrogen to total nitrogen, and 12% TCA soluble nitrogen to total nitrogen in ripened cheese are all increased when protease microcapsule is incorporated in cheese, indicated that degradation of casein into small peptides occurs and lead to the improvement in texture. The microstructure of proteins in cheese was destroyed after 60 days of ripening.
Number of references: 16
Main heading: Nitrogen
Controlled terms: Coremaking - Degradation - Encapsulation - Proteins - Scanning electron microscopy - Textures
Uncontrolled terms: Analysis results - Arabic gums - Box-Behnken design - Cheese ripening - Core material - Freeze drying - Microcapsule - Microcapsule preparation - Microcapsules - Optimum conditions - Response Surface Methodology - Scanning Electron Microscope - SDS-PAGE analysis - Texture analysis - Total nitrogen - Wall materials - Water soluble nitrogens
Classification code: 933 Solid State Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 817.2 Polymer Applications - 813.2 Coating Materials - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.2 Chemical Reactions - 741.1 Light/Optics - 714.2 Semiconductor Devices and Integrated Circuits - 534.2 Foundry Practice - 461.6 Medicine and Pharmacology
DOI: 10.3969/j.issn.1000-1298.2010.02.031
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 26. Accession number: 20101512841323
Title: Vibrating measurement and analysis of seeds layer on precision seedling planting parts for super hybrid rice
Authors: Wang, Zhaohui1, 3 ; Ma, Xu2
Author affiliation: 1 College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
2 Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
3 College of Food Engineering, Jilin Agricultural University, Changchun 130118, China
Corresponding author: Ma, X. (maxu1959@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 68-72
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The performance of fine-sucking seed was controlled by the combination mode of the vacuum cylinder (VC) and the vibrating seed plate (VSP) in the precision seedling planting parts for super hybrid rice. The ebullience and vibration of the seed close to VC in VSP were highly correlated with vibration parameters. The sucking-seed capability of VC was measured on conditions of the different seeds thickness and the installation position of vibrator, respectively. In addition, the vibration characteristic of VSP was studied. The results showed that the optimal performance is obtained when the air-style vibrator is at the rear of VSP, and the regular capability of fine-sucking seed depends on the given seeds thickness close to VC and the vibrator's frequency in harmony. The prime performance comes to 93.118% when the optimum seeds thickness 0.7cm and frequency of vibration 98Hz.
Number of references: 9
Main heading: Seismic prospecting
Controlled terms: Agriculture - Cylinders (shapes) - Vacuum - Vibrators
Uncontrolled terms: Combination modes - Highly-correlated - Installation position - Measurement and analysis - Optimal performance - Plate vibration - Precision seedling - Test - Vibration characteristics - Vibration parameters
Classification code: 752.1 Acoustic Devices - 691.1 Materials Handling Equipment - 633 Vacuum Technology - 601.1 Mechanical Devices - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 512 Petroleum and Related Deposits - 484.1 Earthquake Measurements and Analysis - 481.4 Geophysical Prospecting - 408.2 Structural Members and Shapes - 501.1 Exploration and Prospecting Methods
DOI: 10.3969/j.issn.1000-1298.2010.02.014
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 27. Accession number: 20101512841315
Title: Modeling of speed fluctuations for automotive engine under cylinder deactivation mode
Authors: Zhang, Dengpan1 ; Yuan, Yinnan2 ; Du, Jiayi1 ; Cui, Yong1
Author affiliation: 1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Mechanical Engineering, Nantong University, Nantong 226019, China
Corresponding author: Yuan, Y. (yuanyn@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 23-28
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Cylinder deactivation for automotive engine, to decrease the fuel consumption, has an adverse effect on power-output of engine. The multi-body model of the crank-rod mechanism was created. Based on pressure-volume diagrams and empirical equation, the boundary conditions of the model were analyzed. Three cylinder deactivation modes were given. The simulation under the whole cylinder operation mode and the cylinder deactivation modes were investigated at different load conditions. The results showed that the engine speed fluctuations under the deactivation mode differ from the fluctuations under the whole cylinder operation mode, with respect to operating cylinder load and the firing interval angle.
Number of references: 6
Main heading: Engine cylinders
Controlled terms: Automobile engines - Automobile parts and equipment - Cylinders (shapes) - Engines - Speed
Uncontrolled terms: Adverse effect - Automotive engine - Empirical equations - Engine speed - Load condition - Multi-body models - Operation mode - Speed fluctuations
Classification code: 931.1 Mechanics - 663.2 Heavy Duty Motor Vehicle Components - 662.4 Automobile and Smaller Vehicle Components - 661.1 Automotive Engines - 654.2 Rocket Engines - 617.3 Steam Engines - 612.1.1 Internal Combustion Engine Components - 612 Engines - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.02.006
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 28. Accession number: 20101512841318
Title: Design and experiment on vibration spacing scarifier for meadow
Authors: Wu, Guangwei1 ; Song, Jiannong1 ; Li, Yonglei1 ; Wang, Jicheng1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Song, J. (songjn@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 42-46 41
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 to the serious problem of soil compaction and grassland degradation on account of long-term grazing overload, a 9ST460 vibration spacing scarifier for meadow was designed. The loosing soil parts of interval ladder framework were adopted. By the exciting force produced by the vibration system which is composed of connecting rod and crankshaft to loose soil, the high-solid soil was achieved to loose on the condition without damage to grassland vegetation. Experimental results showed that the scarifier has the ideal loosen effect in the forward speed of 1m/s and vibration frequency 10.0Hz. The test showed that the rate of vegetation destruction is 1.6%, tillage depth is 20.01cm, scarification ratio reaches 43.4%, and productivity reaches 0.85hm2/h. The average soil bulk density and the average firmness reduce by 30.0% and 48.8%, respectively after loosing soil. The yield of natural grassland and artificial grassland increases by 73.99% and 68.65%, respectively. The tilled soil forms the spacing cultivated horizon adapting to the growth of grass. The effect is obvious to improve the grassland ecological environment and improve grass production.
Number of references: 10
Main heading: Soils
Controlled terms: Agricultural machinery - Agriculture - Crankshafts - Design - Experiments - Soil mechanics - Vegetation
Uncontrolled terms: Artificial grassland - Ecological environments - Exciting forces - Forward speed - Grassland degradation - Grassland vegetation - Loose soils - Natural grassland - Soil bulk density - Soil compaction - Tilled soils - Vegetation destruction - Vibration frequency - Vibration systems
Classification code: 902.1 Engineering Graphics - 901.3 Engineering Research - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 601.2 Machine Components - 525.1 Energy Resources and Renewable Energy Issues - 483.1 Soils and Soil Mechanics - 461.9 Biology - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.02.009
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 29. Accession number: 20101512841324
Title: Comparative experiment on anti-blocking mechanism for wheat no-till planter
Authors: Zhang, Xirui1 ; Li, Hongwen1 ; He, Jin1 ; Wang, Qingjie1 ; Zhang, Xuemin1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, H. (lhwen@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 73-77
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Three kinds of anti-blocking mechanism, i.e. powered-chain, powered-disc and strip-rotating, for wheat no-till planting had different performance and adaptability, the passing ability, soil disturbance, fuel consumption, yield, etc., were analysed through field experiment. The experimental results indicated that all the three mechanism have the passing ability when the corn stalk is chopped and returned to the field. But the strip-rotating exceeds the others when 100% corn stalks residue covers the soil surface. Compared with strip-rotating and powered-disc, powered-chain has a less soil disturbance, fuel efficiency, better plant performance and yield.
Number of references: 16
Main heading: Experiments
Controlled terms: Agricultural machinery - Agriculture - Rotation - Soil conservation - Soils
Uncontrolled terms: Blocking mechanisms - Comparative experiments - Conservation tillage - Corn stalk - Field experiment - Fuel efficiency - No-till - No-till planters - Passing ability - Plant performance - Residue cover - Soil disturbances - Soil surfaces
Classification code: 931.1 Mechanics - 901.3 Engineering Research - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 601.1 Mechanical Devices - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.02.015
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 30. Accession number: 20101512841320
Title: Effect of wheel traffic on working resistance of agricultural machinery in field operation
Authors: Chen, Hao1 ; Wu, Weiwei1 ; Liu, Xintian1 ; Li, Hongwen2
Author affiliation: 1 College of Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2 College of Engineering, China Agricultural University , Beijing 100083, China
Corresponding author: Li, H. (lhwen@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 52-57
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Controlled traffic with conservation tillage (CTCT) can reduce soil compaction, thus to improve operation performance of agricultural machine, by separating wheel track and crop zone. The effect of CTCT on operation resistance force was researched in annual two crops region in Northern China. The rolling resistance, opener resistance and total draft between controlled and non-controlled traffic treatments were analyzed. In subsoiling, wheat and maize planting, compared with non-controlled traffic with conservation tillage, CTCT total draft reduced by 14.6%, 13.3% and 13.3%, rolling resistance reduced by 26.9%, 21.9% and 19.7%, averaging 22.9%, working resistance reduced by 7.5%, 7.2% and 12.4%, averaging 8.8%. Opener resistance reduced 22.0% averagely in controlled traffic treatments than that in non-controlled traffic treatments. As the resistance decreased, fuel consumption in controlled traffic treatment reduced by 17.6%, 12.4% and 9.1% in three operations. Results showed that controlled traffic conservation tillage reduces agricultural machine working resistance and fuel consumption in field operation.
Number of references: 12
Main heading: Soil conservation
Controlled terms: Agricultural machinery - Compaction - Crops - Rolling - Rolling resistance - Soil mechanics - Soils - Steel metallurgy - Wheels
Uncontrolled terms: Agricultural machine - Conservation tillage - Controlled traffic - In-field - Northern China - Operation performance - Resistance force - Soil compaction - Wheel track
Classification code: 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 818.5 Rubber Products - 818.3 Rubber and Elastomer Processing - 802.3 Chemical Operations - 821.4 Agricultural Products - 601.2 Machine Components - 536.1 Powder Metallurgy Operations - 535.1 Metal Rolling - 531.1 Metallurgy - 483.1 Soils and Soil Mechanics - 545.3 Steel
DOI: 10.3969/j.issn.1000-1298.2010.02.011
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 31. Accession number: 20101512841346
Title: Real-time recognition of citrus on trees in natural scene
Authors: Lü, Qiang1 ; Cai, Jianrong1 ; Zhao, Jiewen1 ; Wang, Feng1 ; Tang, Mingjie1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Cai, J. (jrcai@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: 2
Issue date: February 2010
Publication year: 2010
Pages: 185-188 170
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Using the gray image of color difference G-B, Otsu algorithm was employed to segment the images of mature citrus and background. Then the occluded fruits and overlapped fruits were separated by watersheds method with distance transform. Convex hull algorithm was used to repair the occluded regions. Roundness threshold was set to remove the error segmented regions. After the citrus contours were extracted, the contours was fitted by means of the least-squares circle fit with Tukey weight function, and the centroid coordinates and radius were gained. The recognition results of 592 fruits in 87 images showed that the total correct recognition rate is up to 87.2%, and the correct recognition rate of occluded citrus and overlapped citrus are more than 80%.
Number of references: 18
Main heading: Image segmentation
Controlled terms: Function evaluation - Image recognition - Landforms - Watersheds
Uncontrolled terms: Color difference - Convex hull algorithm - Distance transforms - Gray image - Least Square - Least-squares circle fit - Natural scenes - Otsu algorithm - Real time recognition - Recognition rates - Segmented regions - Watersheds method - Weight functions
Classification code: 751.1 Acoustic Waves - 741.1 Light/Optics - 723.5 Computer Applications - 921.6 Numerical Methods - 723.2 Data Processing and Image Processing - 481.1 Geology - 444.1 Surface Water - 716 Telecommunication; Radar, Radio and Television
DOI: 10.3969/j.issn.1000-1298.2010.02.037
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 32. Accession number: 20101512841329
Title: Life cycle assessment of biodiesel made of residual frying oil
Authors: Xu, Yingwu1 ; Xie, Xiaomin1 ; Huang, Zhen1 ; Qiao, Xinqi1 ; Zhang, Wugao1
Author affiliation: 1 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Xie, X. (xiexiaomin@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 99-103
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 methodology of life cycle assessment was applied to analyze the primary energy consumption and environmental emissions of biodiesel deriving from residual frying oil, compared with conventional diesel pathway. The conclusions are as follows: fossil energy consumption decreases by 65.7%, especially oil consumption decreases by 91.8%, and the criterion emissions also decreases; the total greenhouse gas emissions decreases by 86.6% with CO2 emission decreasing by 88.1%, according to conversion by means of global warming potential. It fully showed that this kind of biodiesel is an environmental friendly fuel in line with the trend of energy saving and emission reduction.
Number of references: 22
Main heading: Life cycle
Controlled terms: Biodiesel - Gas emissions - Global warming - Greenhouse gases - Leakage (fluid)
Uncontrolled terms: Emission reduction - Energy consumption - Energy saving - Environmental emissions - Environmental-friendly - Fossil energy - Frying oil - Global warming potential - In-line - Life cycle assessment - Life-cycle assessments - Oil consumption - Primary energy consumption
Classification code: 804.1 Organic Compounds - 619.1 Pipe, Piping and Pipelines - 523 Liquid Fuels - 483.1 Soils and Soil Mechanics - 913.1 Production Engineering - 452.3 Industrial Wastes - 451.1 Air Pollution Sources - 451 Air Pollution - 443.1 Atmospheric Properties - 452.1 Sewage
DOI: 10.3969/j.issn.1000-1298.2010.02.020
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 33. Accession number: 20101512841316
Title: Study on vibration isolation characteristics of automobile powertrain mount system based on co-simulation
Authors: Shi, Peicheng1, 2 ; Chen, Wuwei1 ; Chen, Liqing1
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
2 Department of Mechanical Engineering, Anhui University of Technology and Science, Wuhu 241000, China
Corresponding author: Chen, W. (cww@mail.hf.ah.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 29-34 28
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The two non-linear mount simulation models were created by using Matlab software to fit various mount experiment data based on co-simulation. The vibration isolation characteristics of automobile powertrain system was studied under ADAMS software environment along with transmitting data through information exchange interface, and different mounts' vibration isolation performance was analyzed, which could provide research foundation for optimizing analysis and matching of mount system. The results show that the vibration characteristic of powertrain system is closer to actual situation founding on non-linear mount model than on the linear.
Number of references: 10
Main heading: Vibration analysis
Controlled terms: Computer software - MATLAB - Mountings
Uncontrolled terms: ADAMS software - Cosimulation - Experiment data - Information exchanges - Matlab- software - Mount models - Mount system - Non-linear - Power-train systems - Powertrain - Powertrain vibration - Simulation model - Transmitting data - Vibration characteristics - Vibration isolations
Classification code: 943.2 Mechanical Variables Measurements - 921 Mathematics - 751.2 Acoustic Properties of Materials - 723.5 Computer Applications - 723.1.1 Computer Programming Languages - 723 Computer Software, Data Handling and Applications - 601.2 Machine Components
DOI: 10.3969/j.issn.1000-1298.2010.02.007
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 34. Accession number: 20101512841317
Title: Analysis of influencing factors on power consumption and field test of universal blade
Authors: Ji, Wenfeng1 ; Jia, Honglei1 ; Tong, Jin1 ; Tan, Hongjie2 ; Liu, Zhaochen2 ; Ma, Chenglin1
Author affiliation: 1 Key Laboratory of Bionic Engineering, Jilin University, Changchun 130025, China
2 Jilin Province Academy of Agricultural Machinery, Changchun 130022, China
Corresponding author: Jia, H. (jiahl@vip.163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 35-41
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: Power consumption (torque) tests of a single universal blade for rototilling and stubble breaking were conducted in the soil bin, to investigate the influences of the tillage depth and rotary speed of the blade as well as the working speed of the machine on power consumption. The regression equations for the relations between power consumption and the above parameters were established. Soil bin tests indicated that the parameter that had significant influence on power consumption is the rotary speed, next is the tillage depth, and the working speed had less influence. Then the universal blades were mounted on the bionic intelligent rototilling-stubble-breaking machine to perform rototilling and stubble-breaking tests respectively. Field tests showed that the stability of the tillage depth is over 93%, stubble-breaking rate, stubble coverage rate and soil-crushing rate are 81.8%, 87.2%, 87.9% on average, respectively, which meets the agrotechnical requirements.
Number of references: 15
Main heading: Testing
Controlled terms: Agricultural machinery - Agriculture - Bins - Regression analysis - Soils - Speed
Uncontrolled terms: Coverage rate - Crushing rates - Field test - Influencing factor - Orthogonal regression - Orthogonal regression design - Power Consumption - Regression equation - Rotary speed - Working speed
Classification code: 922.2 Mathematical Statistics - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 931.1 Mechanics - 694.4 Storage - 423.2 Test Methods - 422.2 Test Methods - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.02.008
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 35. Accession number: 20101512841338
Title: Design of automatic measurement system of cooked rice hardness
Authors: Gao, Yuan1 ; Zhou, Jiping2 ; Jiang, Nan2 ; Gao, Longqin2 ; Zhou, Jianhua2 ; Dai, Qigen1
Author affiliation: 1 Agricultural College, Yangzhou University, Yangzhou 225009, China
2 College of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China
Corresponding author: Zhou, J. (jpzhou@yzu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 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: The rice hardness is one of the most important qualification to scale the rice quality. Nowadays the rice taste meter is employed to detect the rice eating quality, which is NIR-based to beget the controversy about precision. In virtue of the measurement of engineering theory, the design of the automatic measurement of the rice hardness was carried out. The experiments prove that the instrument can detect the rice hardness accurately, with the result consistent with that of the rice taste meter. The simple, accuracy and reliable method has the value of application for the measurement and estimates of the quality of the rice.
Number of references: 8
Main heading: Measurements
Controlled terms: Design - Hardness
Uncontrolled terms: Automatic measurement system - Automatic measurements - Cooked rice - Eating quality - Hardness measurement
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 951 Materials Science - 941 Acoustical and Optical Measuring Instruments - 421 Strength of Building Materials; Mechanical Properties - 408 Structural Design - 902.1 Engineering Graphics
DOI: 10.3969/j.issn.1000-1298.2010.02.029
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 36. Accession number: 20101512841347
Title: Self-adaptive method for extracting rice seed's contour based on ant colony optimization algorithm
Authors: Shi, Lijuan1, 2 ; Wen, Youxian2 ; Jing, Xiu1
Author affiliation: 1 College of Basic Sciences, Huazhong Agricultural University, Wuhan 430070, China
2 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Wen, Y. (wenyouxian@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 189-192 202
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: None of the traditional methods for extracting contour has the good self-adaptive ability. To solve this problem, a method based on ant colony optimization algorithm was presented for extracting seed's contour in digital image. The digital image was taken as a two-dimensional grid. The seed's contour was the food for ant. The gradient and direction in the preceding step were the heuristic information which guided the ants to search the real contour together with pheromone intensity. Reasonable heuristic information and pheromone update mechanism was defined to increase the speed of convergence and raise the search ability. The relationship between the parameters in the algorithm was also studied. At last, the acquired images under two different kinds of illuminations were used to test the algorithm. The experiment result showed that the algorithm not only has nice robustness and parallelism, but also has preferable self-adaptive ability, and extract contour more accurately than the traditional methods.
Number of references: 9
Main heading: Image processing
Controlled terms: Algorithms - Artificial intelligence - Digital image storage - Imaging systems - Optimization - Seed
Uncontrolled terms: Ant Colony Optimization algorithms - Contour image - Digital image - Heuristic information - Rice seed - Self-adaptive - Self-adaptive method - Speed of convergence
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 821.4 Agricultural Products - 746 Imaging Techniques - 741.3 Optical Devices and Systems - 741 Light, Optics and Optical Devices - 723.4 Artificial Intelligence - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 722.4 Digital Computers and Systems - 722.1 Data Storage, Equipment and Techniques
DOI: 10.3969/j.issn.1000-1298.2010.02.038
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 37. Accession number: 20101512841333
Title: Effect of CA, MAP and 1-MCP on browning inhibition and fresh-keeping of Whangkeumbae pear
Authors: Wang, Zhihua1 ; Ding, Dandan1 ; Wang, Wenhui1 ; Tong, Wei1 ; Zhang, Zhiyun1 ; Jia, Xiaohui1
Author affiliation: 1 Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
Corresponding author: Wang, W. (wenhuiw@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 117-121
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: 'Whangkeumbae' pear was treated with 1-MCP at different levels, along with the control atmosphere and modified atmosphere packing, to study browning inhibition and fresh-keeping. The results showed that gas composition of 3.0%O2 and 0.5%CO2 is suitable for storage of 'Whangkeumbae'pear, keeping higher firmness, inhabiting black skin completely, reducing core browning index significantly. The concentration of 1.0μL/L 1-MCP induced CO2 injury to fruits stored in control atmosphere. Fruits with 0.5μL/L 1-MCP treatment had good effect of browning inhibition and fresh-keeping, whatever stored in unpacked thick bags or packed thin bags. Application of only packed thick bags applied gains a good modified atmosphere effect, while treatment with 1-MCP results in CO2 injury fruits at different levels.
Number of references: 8
Main heading: Fruits
Controlled terms: Image storage tubes
Uncontrolled terms: Browning index - Concentration of - Fresh-keeping - Gas compositions - In-control - Modified atmosphere - Modified atmosphere packaging - Tissue browning
Classification code: 714.1 Electron Tubes - 821.4 Agricultural Products
DOI: 10.3969/j.issn.1000-1298.2010.02.024
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 38. Accession number: 20101512841344
Title: Walking goal line detection based on improved Hough transform on harvesting robot
Authors: Wu, Gang1 ; Tan, Yu1 ; Zheng, Yongjun1 ; Wang, Shumao1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Tan, Y. (tanyu32@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 176-179
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An algorithm for walking goal line detection was hereby proposed based on improved randomized Hough transform (RHT) for harvesting robot. A camera was fixed on the top of the combined harvester in order to capture images of farmland scenes in the process of harvesting. By virtue of statistic analysis and edge detection, the target location of walking goal line as well as the optimal points in the straight-line direction were determined according to different color features of harvested areas, non-harvested areas and areas without farmlands respectively. The optimal points selected as the point set, complete line detection was accomplished by applying RHT, which avoids invalid sampling and accumulation in comparison with the traditional algorithm of RHT. Through processing various pictures, it was well proved that the algorithm can effectively detects the linear parameters, with the processing time of about 200ms.
Number of references: 11
Main heading: Edge detection
Controlled terms: Harvesting - Hough transforms - Navigation - Robots
Uncontrolled terms: Capture images - Color features - Harvesting robot - Line detection - Linear parameters - Optimal points - Point set - Processing Time - Randomized Hough transform - Statistic analysis - Target location
Classification code: 821.3 Agricultural Methods - 751.1 Acoustic Waves - 741.1 Light/Optics - 731.6 Robot Applications - 731.5 Robotics - 921.3 Mathematical Transformations - 723.5 Computer Applications - 716 Telecommunication; Radar, Radio and Television - 655.1 Spacecraft, General - 434.4 Waterway Navigation - 431.5 Air Navigation and Traffic Control - 716.3 Radio Systems and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.02.035
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 39. Accession number: 20101512841330
Title: Simulation experiment on wind turbine soft braking
Authors: Bao, Xianbing1 ; Lin, Yonggang1 ; Li, Wei1 ; Lu, Xiaoping1 ; Yang, Canjun1
Author affiliation: 1 State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Bao, X. (strong107@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 104-107 112
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A soft braking system was designed based on the mathematic model of wind turbine braking, and a semi-physical simulation test-bed for wind turbine was really formed. Analog simulation experiment for wind turbine soft braking was performed on the test-bed. Experiment results indicated that, when the wind turbine was regularly stopped, soft braking controls the high-speed switch valve on-off time by means of varying the PWM output of PLC, to adjust brake force through, which can make rotor speed fall down gently and minish the gearbox torque wave.
Number of references: 7
Main heading: Braking
Controlled terms: Brakes - Experiments - Test facilities - Wind power - Wind turbines
Uncontrolled terms: Analog simulations - Braking control - Braking system - High-speed switches - Mathematic model - OFF time - Physical simulation - Rotor speed - Semi-physical simulation - Simulation experiments - Soft braking
Classification code: 402.1 Industrial and Agricultural Buildings - 422.1 Test Equipment - 423.1 Test Equipment - 602 Mechanical Drives and Transmissions - 615.8 Wind Power ( Before , use code ) - 901.3 Engineering Research
DOI: 10.3969/j.issn.1000-1298.2010.02.021
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 40. Accession number: 20101512841342
Title: Preparation, toxicity and components for bitter almond shell wood vinegar
Authors: Mao, Qiaozhi1 ; Zhao, Zhong1 ; Ma, Xihan2 ; Li, Keyou1
Author affiliation: 1 College of Forestry, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Sciences, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Zhao, Z. (zhaozh@nwsuaf.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 164-170
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: Bitter almond shell was pyrolyzed to prepare wood vinegar. The vinegar was studied in term of the antibacterial activity, physical characters and the chemical components, to offer the theory base for almond shell wood vinegar used as a botanic antiseptic. Based on pyrolysis theories, wood vinegars were collected rang from 90-170°C, 170-370°C, and 370-500°C respectively, and refined by standing, adsorptions by charcoal and filtration. Physical and chemical characters were tested. Antibacterial activity of the obtained wood vinegar on germina was also investigated. The results showed that the generating temperature ranges of bitter almond shell wood vinegar is 90-500°C; the maximum amount of the wood vinegar was collected at the range of 170-370°C, which also showed the strongest anti-pathogens activities, the minimum pH and the highest organic acid content. GC/MS analysis showed that the main compositions of wood vinegar collected at 170-370°C is hydroxybenzenes, organic acids, aldehydes, ketones, alcohols, furans and esters etc. Among all the components examined, the content of acetic acid was the highest (22.41%), next the furfural and the phenol. Based on the preliminary analysis, it was considered that phenols, acetic acid and furfural are the active components of antibacterial activity.
Number of references: 20
Main heading: Acetic acid
Controlled terms: Aldehydes - Charcoal - Esters - Furfural - Ketones - Organic acids - pH effects - Phenols - Pyrolysis - Shells (structures) - Wood
Uncontrolled terms: Active components - Almond shells - Anti-bacterial activity - Chemical component - Chemical components - GC/MS analysis - Preliminary analysis - Temperature range
Classification code: 408.2 Structural Members and Shapes - 524 Solid Fuels - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804.1 Organic Compounds - 811.2 Wood and Wood Products
DOI: 10.3969/j.issn.1000-1298.2010.02.033
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 41. Accession number: 20101512841335
Title: Optimization of super heated stream puffing drying technology for carrot
Authors: Song, Hongbo1 ; An, Fengping1
Author affiliation: 1 College of Food Science, Fujian Agriculture and Forestry University Fuzhou 350002, China
Corresponding author: Song, H. (sghgbode@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 127-131
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A three factors quadratic regression rotation combination design was adopted to study the effect of moisture content of pre-dried carrots, super heated stream temperature and treating time on the specific volume of puffed carrots and product rehydration ratio. Results showed that all the three factors have significant effect. Long treating time increases specific volume of puffed carrots while decreases product rehydration ratio significantly. The optimized result is 23% moisture content of pre-dried carrot, 150°C puffing temperature and 50s treating time. Puffing dried carrot at the above condition has small a shrinkage, a high rehydration ratio, and a appropriate hardness. Super heated stream puffing drying has a higher efficiency comparing to hot air drying, which could decrease drying time near 40%.
Number of references: 8
Main heading: Curing
Controlled terms: Dewatering - Drying - Hydraulics - Moisture - Moisture determination - Optimization - Process control
Uncontrolled terms: Combination design - Drying process - Drying technology - Drying time - Higher efficiency - Hot air drying - Moisture contents - Quadratic regression - Rehydration ratio - Specific volume - Stream temperatures
Classification code: 944.2 Moisture Measurements - 921.5 Optimization Techniques - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 731 Automatic Control Principles and Applications - 642.1 Process Heating - 632.1 Hydraulics - 443.1 Atmospheric Properties
DOI: 10.3969/j.issn.1000-1298.2010.02.026
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 42. Accession number: 20101512841334
Title: Characteristics of moisture migration during drying of horse mackerel by heat pump dehumidifier
Authors: Shi, Qilong1 ; Zhao, Ya1 ; Li, Zhaojie2 ; Xue, Changhu2
Author affiliation: 1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
2 College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
Corresponding author: Xue, C. (xuech@ouc.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 122-126
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: With horse mackerel as experimental material, the temperature distribution and migration characteristic of moisture during fish fillets drying by heat pump dehumidifier (HPD) were studied. The results showed that temperature distribution inside horse mackerel fillets is uniform during the great part of drying periods, and the regular temperature gradient along the direction of fish fillets thickness doesn't occur. During horse mackerel drying by HPD, an obvious moisture gradient along the direction of thickness of fillets is found with drying temperature and velocity. In the initial stage of drying, drying rate of fish fillets is mainly depended on moisture evaporation. In the next stage of drying, drying rate of fish fillets is mainly depended on moisture diffusion. The moisture migration is mainly controlled by moisture content gradient.
Number of references: 11
Main heading: Moisture
Controlled terms: Curing - Dewatering - Drying - Fish - Heat pump systems - Humidity control - Meats - Moisture determination - Pumps - Temperature distribution - Thermoanalysis
Uncontrolled terms: Drying rates - Drying temperature - Experimental materials - Fish fillet - Heat pump dehumidifier - Heat pump drying - Initial stages - Mackerel drying - Moisture content gradient - Moisture diffusion - Moisture evaporation - Moisture gradient - Moisture migration - Temperature gradient
Classification code: 801 Chemistry - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 944.2 Moisture Measurements - 815.1 Polymeric Materials - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 822 Food Technology - 822.3 Food Products - 818.3 Rubber and Elastomer Processing - 643.3 Air Conditioning - 642.1 Process Heating - 402 Buildings and Towers - 443.1 Atmospheric Properties - 461 Bioengineering and Biology - 471 Marine Science and Oceanography - 616.1 Heat Exchange Equipment and Components - 618.2 Pumps - 641.1 Thermodynamics - 641.2 Heat Transfer
DOI: 10.3969/j.issn.1000-1298.2010.02.025
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 43. Accession number: 20101512841341
Title: Effect of cellulose degradation on soybean oil extraction yield through extrusion and expansion processing
Authors: Li, Yang1 ; Jiang, Lianzhou1, 3 ; Zhang, Zhaoguo2 ; Wu, Haibo3 ; Xu, Jing1 ; Wu, Xia1
Author affiliation: 1 College of Food Science, Northeast Agricultural University, Harbin 150030, China
2 College of Agricultural Engineering, Northeast Agricultural University, Harbin 150030, China
3 Chinese Engineering Center of Soybean, 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: 2
Issue date: February 2010
Publication year: 2010
Pages: 157-163
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: Based on single factor experiment, response surface methodology was used and orthogonal experiment was designed to investigate the effect of extruding parameters on soybean oil yield extracted with enzyme-assisted aqueous extraction processing and cellulose degradability after extrusion and expansion. Statistical analysis system (SAS) was employed to establish regression model and interaction of factors was analyzed. Results showed that the optimal total soybean oil yield is 93.02%±0.29% on response surface with the die length of 20mm, moisture of material of 14.5%, rotate speed for screw of 105r/min, and sleeve temperature of 90°C. Furthermore, There existences a optimal cellulose degradability value of 40.28%±0.43% on response surface when die length is 18 mm, moisture of meal is 15%, rotate speed of screw is 100r/min, and sleeve temperature is 95°C. The degree of cellulose degradability has a significant effect on total oil extraction yield during extrusion and expansion period, total oil extraction yield during extrusion and expansion was not only dependent on cellulose degradability.
Number of references: 20
Main heading: Solvent extraction
Controlled terms: Cellulose - Degradation - Dies - Enzymes - Expansion - Extrusion - Moisture - Regression analysis - Surface properties
Uncontrolled terms: Aqueous extraction - Cellulose degradation - Degradability - Oil extraction - Orthogonal experiment - Regression model - Response surface - Response Surface Methodology - Rotate speed - Sleeve temperature - Soybean oil - Statistical analysis systems
Classification code: 802.3 Chemical Operations - 804.1 Organic Compounds - 811.3 Cellulose, Lignin and Derivatives - 951 Materials Science - 815.1.1 Organic Polymers - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 816.1 Processing of Plastics and Other Polymers - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 443.1 Atmospheric Properties - 461.2 Biological Materials and Tissue Engineering - 534.1 Foundries - 535.2.2 Metal Forming Practice - 603.2 Machine Tool Accessories - 801.2 Biochemistry
DOI: 10.3969/j.issn.1000-1298.2010.02.032
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc. 44. Accession number: 20101512841325
Title: Design for precision metering device with center transmission
Authors: Zhang, Yuwen1 ; Zhang, Wenchao1 ; Li, Dongxiao2
Author affiliation: 1 Baoji Institute of Agricultural Sciences, Qishan 722400, China
2 Shaanxi Ronghua Rape Seed Co., Ltd., Xi'an 710075, China
Corresponding author: Zhang, Y. (zhyw005@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 2
Issue date: February 2010
Publication year: 2010
Pages: 78-81 121
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 to the problem that the transmission axis of the multiple functions of precision seed-drilled appliance is not in the center of the seed-drilled wheel, the new curve for seed pushing wheel was applied, to lower the location of seed pushing wheel, and locate the transmission axis in the center of the seed pushing wheel. Furthermore, the aperture and number of the seed pushing wheel for different seeds were investigated, and the seeds amount of per hole, the rates of broken seeds and the reliability were all measured. The new type precision seed-drilled appliance has been produced, and been applied in multiple types drills successfully in present.
Number of references: 4
Main heading: Seed
Controlled terms: Dentistry - Design - Wheels
Uncontrolled terms: Multiple function - Precision metering - Precision metering device
Classification code: 902.1 Engineering Graphics - 821.4 Agricultural Products - 601.2 Machine Components - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.02.016
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
? 2009 Elsevier Inc. All rights reserved.
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