2011年第42卷第8期共收录44篇
1. Accession number:20113614302304
 Title:7YGS-45 type self-propelled dual-track mountain orchard transport
 Authors:Li, Shanjun1 ; Xing, Junjun1 ; Zhang, Yanlin1 ; Meng, Liang1 ; Fan, Qizhou1
Author affiliation: 1 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
 Corresponding author:Zhang, Y. (zhangyl@mail.hzau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:85-88
 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 high labor intensity and low efficiency during the working practice of transporting fruits, fertilizers and pesticide in mountain orchard, the 7YGS-45 type self-propelled dual-track orchard transport was developed, and the following key technical problems were mainly solved, such as the steel wire rope and a couple of driving wheels cooperated friction drive, the track holding and disc braking cooperated braking, anti-side slipping and anti-jumping, anti rope rising and anti rope straightening during the rail curves, trailer's slope adaptive adjustment, etc. The experimental results indicated that, the transport machine could run smoothly on the paved tracks, with the maximum climbing slope of 47°, minimum horizontal turning radius of 8 m, the average speed of 1.0 m/s. The transport machine could not only be used in the mountain orchard to transport the fruits and fertilizers, but also be equipped with spraying operations, cutting operations, or other operations.
 Number of references:11
 Main heading:Orchards
Controlled terms:Fertilizers  -  Fruits  -  Landforms  -  Rope  -  Straightening  -  Wire
Uncontrolled terms:Adaptive adjustment  -  Average speed  -  Climbing slope  -  Cutting operations  -  Driving wheels  -  Dual-track  -  Friction drive  -  Labor intensity  -  Mountain orchard  -  Self-propelled   -  Steel wire rope  -  Technical problem  -  Transport machines  -  Turning radius  -  Working practices
Classification code:481.1 Geology  -  535 Rolling, Forging and Forming  -  535.2 Metal Forming  -  804 Chemical Products Generally  -  821.3 Agricultural Methods  -  821.4 Agricultural Products
 Database:Compendex
   
2. Accession number:20113614302293
 Title:Pneumatic centralized metering device for rapeseed
 Authors:Liao, Qingxi1 ; Zhang, Meng1 ; Yu, Jiajia1 ; Liu, Xiaohui1
Author affiliation: 1  College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
 Corresponding author:Liao, Q. (liaoqx@mail.hzau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:30-34
 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 small seed's precision seeding such as rapeseed seeds and complex structure caused by traditional metering device's multiline sowing, a pneumatic centralized metering device was developed. The structure and parameters were analyzed. With "Chinese hybrid 4" rapeseed as the test object, seeding consistency test and seeding uniformity test were applied to research the vacuum value and rotate speed of the roller that influenced the sowing-performance mainly. According to experiment analysis, the influencing regularity and the optimization of all the factors were defined. The analyses of the experiment results indicated that the vacuum value was the most important factor, the second was rotate speed. The optimum operation condition were: vacuum value of -1.5 kPa and rotate speed of the roller of 20 r/min.
 Number of references:11
 Main heading:Oilseeds
Controlled terms:Experiments  -  Pneumatics  -  Rollers (machine components)  -  Vacuum
Uncontrolled terms:Complex structure  -  Consistency tests  -  Experiment analysis  -  Metering  -  Metering devices  -  Optimum operation conditions  -  Rapeseed  -  Rotate speed  -  Test object
Classification code:601.2 Machine Components  -  632.3 Pneumatics  -  633 Vacuum Technology  -  821.4 Agricultural Products  -  901.3 Engineering Research
 Database:Compendex
   
3. Accession number:20113614302319
 Title:Cucumber shape description based on elliptic Fourier descriptor
 Authors:Qi, Liyong1 ; Gao, Feng1 ; Tan, Yuzhi2 ; Yang, Qinghua1
Author affiliation: 1  The Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, China
2  College of Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Yang, Q. (robot@zjut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:164-167 142
 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:Aiming at identifying the shape of arbitrary object quickly and accurately, cucumber was taken as a research object. The boundary of cucumber image was extracted through digital image processing including image enhancing, threshold processing, morphological operations and edge extraction operation. Then elliptic Fourier descriptors were used to describe the boundary information of cucumber quantitatively, and the elliptic Fourier descriptors were normalized at start point, rotation and size after that. The cucumber shape was reconstructed by using different numbers of harmonics of elliptic Fourier descriptors with error analysis. The experiment results showed that the complex shape of cucumber could be described by a small amount of elliptic Fourier descriptor through the description of elliptic Fourier method, and the elliptic Fourier descriptor could reconstruct the original shape accurately.
 Number of references:11
 Main heading:Fourier transforms
Controlled terms:Content based retrieval  -  Error analysis  -  Geometry  -  Image processing  -  Mathematical morphology
Uncontrolled terms:Arbitrary objects  -  Boundary  -  Boundary information  -  Complex shapes  -  Cucumber  -  Edge extraction  -  Elliptic Fourier descriptor  -  Elliptic fourier descriptors  -  Fourier descriptors  -  Fourier methods   -  Image enhancing  -  Morphological operations  -  Research object  -  Shape description  -  Start point  -  Threshold processing
 Classification code:741 Light, Optics and Optical Devices  -  921 Mathematics
 Database:Compendex
   
4. Accession number:20113614302290
 Title:Body posture control based on suspension utility function
 Authors:Chen, Long1 ; Huang, Chen1 ; Jiang, Haobin1 ; Chen, Rongrong1
Author affiliation: 1  School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
 Corresponding author:Chen, L. (chenlong@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:15-19 25
 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 study the influence of body posture interdependency on suspension control, the model of full vehicle using eight schematic of vehicle plate was analyzed. An approach based on the suspension utility function and a weighted optimization algorithm based on entropy value was presented. A kind of control strategy used in Simulink was designed. Meantime, taking a certain vehicle as an example, a whole multi-body model of vehicle was built. The SIMPACK/Matlab co-simulation in different vehicle speeds under impulse road and snakelike road was tested respectively. Then, the effects of semi-active suspension with fuzzy logical of optimal suspension utility function and other controls were compared. Theoretical analysis and simulation experiment showed that semi-active suspension controlled with fuzzy logical of optimal suspension utility function was practicable. It could improve ride comfort and restrain pitch and roll motion.
 Number of references:9
 Main heading:Suspensions (components)
Controlled terms:Automobile bodies  -  Automobile suspensions  -  Optimization  -  Roads and streets  -  Vehicles
Uncontrolled terms:Analysis and simulation  -  Body posture control  -  Body postures  -  Control strategies  -  Cosimulation  -  Entropy value  -  Fuzzy logical  -  Multi-body models  -  Optimization algorithms  -  Posture control   -  Ride comforts  -  Roll motions  -  Semi active suspension  -  SIMPACK  -  Simulink  -  Suspension control  -  Utility function  -  Utility functions  -  Vehicle speed
Classification code:406.2 Roads and Streets  -  432 Highway Transportation  -  601.2 Machine Components  -  632.1 Hydraulics  -  663.2 Heavy Duty Motor Vehicle Components  -  921.5 Optimization Techniques
 Database:Compendex
   
5. Accession number:20113614302321
Title:Design and experiment of watermelon seed machine vision inspection system based on FPGA
 Authors:Zhao, Jiwen1 ; Gao, Shang1 ; Wei, Zhengcui1 ; Wang, Yang1
Author affiliation: 1  School of Electrical Engineering and Automation, Anhui University, Hefei 230601, China
 Corresponding author:Zhao, J. (ustczjw@ustc.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:173-177 163
 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:A kind of watermelon seeds sorter system with linear CCD chip was designed based on the FPGA parallel computing platform. Through integrating CCD driver, dynamic image acquisition and processing algorithms, classification algorithm and valve control signal output in one FPGA chip, the hardware platform were designed. The color sorter prototype system had an output of 1.2~1.8 t/h, color sorting accuracy was 97.7%, ratio of color separation mass was 6~8. The good real-time and efficiency of the watermelon seeds sorter system based on FPGA were verified by the experiments that compared with the traditional industrial computer platform.
 Number of references:15
 Main heading:Field programmable gate arrays (FPGA)
Controlled terms:Algorithms  -  Color  -  Computer vision  -  Experiments  -  Parallel architectures  -  Seed
Uncontrolled terms:CCD drivers  -  Classification algorithm  -  Color separation  -  Color sorting  -  FPGA chips  -  Hardware platform  -  Industrial computers  -  Linear CCD  -  Machine vision inspection  -  Parallel computing platform   -  Processing algorithms  -  Prototype system  -  Sorter  -  System-based  -  Valve control  -  Watermelon seed
Classification code:921 Mathematics  -  901.3 Engineering Research  -  821.4 Agricultural Products  -  741.2 Vision  -  741.1 Light/Optics  -  723.5 Computer Applications  -  723 Computer Software, Data Handling and Applications  -  722 Computer Systems and Equipment  -  721.3 Computer Circuits
 Database:Compendex
   
6. Accession number:20113614302297
 Title:Arrayed sensors measurement for load distribution of plow
 Authors:Zhai, Lixin1 ; Ji, Changying1 ; Yu, Yinmei1 ; Ding, Qishuo1
Author affiliation: 1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
 Corresponding author:Ji, C. (chyji@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:50-53
 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 reveal the relationship between surface of plow and soil, the feasibility of using the sensors to test the force on the plow surface was discussed. 11 sensors were packaged in the self-isolation boxes and arranged in the surface of plow to form a sensor array. And then the system was put into the paddy soil for testing. The result showed that proposed method met the practice demand. The data showed that the maximum load was on the plowshare's spade, and the minimum load was in the area of the transition from plowshare to the wall.
 Number of references:16
 Main heading:Soil testing
 Controlled terms:Sensor arrays  -  Soils
Uncontrolled terms:Arrayed sensors  -  Load  -  Load distributions  -  Maximum load  -  Minimum load  -  Paddy soils  -  Plow
Classification code:483.1 Soils and Soil Mechanics  -  716 Telecommunication; Radar, Radio and Television  -  732 Control Devices
 Database:Compendex
   
7. Accession number:20113614302296
Title:Non-circular gear parameters of rotary transplanting mechanism calculated by reverse method
 Authors:Li, Ge1 ; Li, Hui1 ; Fang, Minghui2 ; Niu, Shicong1
Author affiliation: 1  Mechanical and Automation College, Zhejiang Sci-Tech University, Hangzhou 310018, China
2  School of Information and Engineering, Huzhou Teachers College, Huzhou 313000, China
 Corresponding author:Li, G. (lige918@yahoo.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:46-49
 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 addendum circle data of non-circular gears planetary in rotary transplanting mechanism, non-circular gears vertex coordinate was described to get the pitch-lines by using reverse method. The trajectory of seedling-push device was simulated by autonomous design software. The non-circular gear planetary rotary transplanting mechanism was tested to confirm if the requirement of rice transplant was met. At the same time, the parameters were optimized.
 Number of references:7
 Main heading:Gears
 Controlled terms:Optimization  -  Software design
Uncontrolled terms:Addendum circle  -  Design softwares  -  Non-circular gears  -  Reverse method  -  Rice transplanter  -  Transplanting mechanism  -  Vertex coordinates
Classification code:601.2 Machine Components  -  723.1 Computer Programming  -  921.5 Optimization Techniques
 Database:Compendex
   
8. Accession number:20113614302318
Title:Correction algorithm of illumination nonuniformity on fruit surface and defects extraction using single threshold value
 Authors:Li, Jiangbo1 ; Rao, Xiuqin1 ; Ying, Yibin1
Author affiliation: 1  College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310059, China
 Corresponding author:Rao, X. (xqrao@zju.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:159-163
 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:An algorithm was proposed to overcome the difficulty that defects could not be successfully segmented at one time due to illumination nonuniformity on fruit surface. Navel orange was selected as experiment object. Firstly, the R-component image of navel orange was extracted and original image was obtained by removed R-component image background. Then, incident component of original image was obtained by low pass filtering based on illumination-reflectance model. The incident component was considered as illumination image of original image. Finally, the corrected image was computed by original image dividing by illumination image. Defects were successfully segmented at one time by a threshold value. The sound samples and samples with other ten types of peel diseases were detected by using the proposed method. The experimental result showed that the recognition rate was over 97% based on 788 obtained images.
 Number of references:16
 Main heading:Surface defects
 Controlled terms:Algorithms  -  Computer vision  -  Defects  -  Fruits
Uncontrolled terms:Corrected image  -  Correction algorithms  -  Defect detection  -  Fruit surfaces  -  Illumination correction  -  Low-pass filtering  -  Navel orange  -  Nonuniformity  -  Original images  -  Recognition rates   -  Sound sample
Classification code:951 Materials Science  -  921 Mathematics  -  821.4 Agricultural Products  -  723.5 Computer Applications  -  723 Computer Software, Data Handling and Applications  -  423 Non Mechanical Properties and Tests of Building Materials  -  421 Strength of Building Materials; Mechanical Properties
 Database:Compendex
   
9. Accession number:20113614302300
 Title:Spherical-top structure mathematical model and wear experiments of flat-fan nozzle
 Authors:Zhai, Enyu1 ; Zheng, Jiaqiang1
Author affiliation: 1  College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
 Corresponding author:Zheng, J. (jqzheng@njnet.nj.ac.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:65-69
 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 complex structure on the spherical-top of flat-fan nozzle orifices and the erosion situation of solid pesticide on the inner surface of nozzle were studied. Firstly, a mathematical equation of the basic structure was established according to the solid geometry. Secondly, the most significant wear in the x-axis of the spherical-top of fan orifices was concluded through mechanical analysis. Finally, the theoretical analysis was verified through the experiments, and the wear rate relationship was established with the spraying time and the dimensional change of the spherical-top of flat-fan orifices.
 Number of references:10
 Main heading:Nozzles
 Controlled terms:Experiments  -  Mathematical models  -  Orifices  -  Spheres
Uncontrolled terms:Basic structure  -  Complex structure  -  Dimensional changes  -  Flat-fan nozzle  -  Inner surfaces  -  Mathematical equations  -  Mechanical analysis  -  Mechanics analysis  -  Nozzle orifice  -  Spraying time   -  Wear rates
Classification code:631 Fluid Flow  -  631.1 Fluid Flow, General  -  901.3 Engineering Research  -  921 Mathematics
 Database:Compendex
   
10. Accession number:20113614302331
 Title:Drop formation characteristic of liquid-liquid circulating fluidized bed
 Authors:Liang, Kunfeng1 ; Gao, Chunyan1 ; Wang, Lin2
Author affiliation: 1  College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
2  College of Architectural Engineering, Henan University of Science and Technology, Luoyang 471003, China
 Corresponding author:Liang, K. (liangkunf@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:228-234
 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:Drop formation characteristic of liquid-liquid circulating fluidized bed (LLCFB) were experimentally studied by means of image gathering and processing. Three typical liquid-liquid atomization forms related to drop formation were defined. The relativity was investigated between liquid-liquid atomization forms and jet length fluctuation or drop size distribution, and the change rules of liquid-liquid atomization forms, jet break-up intensity, jet length fluctuation and drop size distribution were obtained with the relative Reynolds number (Rer) between the two phases. The results showed that the course of drops formation rested seriously with Rer. Along with increasing Rer, jet break-up intensity was strengthened continually and liquid-liquid atomization formed by trickling to the laminar jet transformation, developed finally for turbulent motion jet. Jet length fluctuation was characterized by random and no periodic. The overall change tread of standard derivation was consistent with average jet length each other with Rer, and their maximum happened at 1.3×104. Furthermore, spread parameter of drop size distribution increased to the stage of turbulent motion jet atomization and the uniformity appeared at 2.5×104, but the average diameter of drops always decreased with increasing Rer and its maximum at the stage of turbulent motion jet atomization.
 Number of references:11
 Main heading:Liquids
Controlled terms:Atomization  -  Drop formation  -  Fluidization  -  Fluidized bed process  -  Fluidized beds  -  Jets  -  Reynolds number  -  Size determination  -  Size distribution
Uncontrolled terms:Average diameter  -  Circulating fluidized bed  -  Drop size distribution  -  Formation characteristics  -  Image gathering  -  Jet atomization  -  Jet breakup  -  Jet length  -  Laminar jets  -  Liquid-liquid atomization   -  Liquid-liquids  -  Turbulent motion
Classification code:533.1 Ore Treatment  -  631.1 Fluid Flow, General  -  802.1 Chemical Plants and Equipment  -  802.3 Chemical Operations  -  931.2 Physical Properties of Gases, Liquids and Solids  -  943.3 Special Purpose Instruments
 Database:Compendex
   
11. Accession number:20113614302307
 Title:Design of 3-D DEM boundary modeling software
 Authors:Yu, Yajun1 ; Yu, Jianqun1 ; Chen, Zhong1 ; Fu, Hong2
Author affiliation: 1  College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
2  College of Computer Science and Technology, Jilin University, Changchun 130012, China
 Corresponding author:Fu, H. (Fuhong@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:99-103 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:For the current problems in boundary modeling of DEM, a 3-D DEM boundary modeling software combined with VC platform, MFC libraries and Access database was developed. It integrated with the UG software and the 3-D DEM analysis software. Taking the cell wheel feed as an example, there was good agreement by designing the CAD model and comparing the 3-D simulation results of its working process with the experiment results. The results were proved to be feasible and effective.
 Number of references:8
 Main heading:Three dimensional
 Controlled terms:Computer aided design  -  Three dimensional computer graphics
Uncontrolled terms:3D simulations  -  Boundary modeling  -  CAD models  -  Cell wheel feed  -  Modeling softwares  -  Redevelopment  -  UG software  -  Working process
 Classification code:723.5 Computer Applications
 Database:Compendex
   
12. Accession number:20113614302317
 Title:Moving obstacle detection based on machine vision for agricultural mobile robot
 Authors:Zhou, Jun1 ; Cheng, Jiayu1
Author affiliation: 1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
 Corresponding author:Zhou, J. (zhoujun@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:154-158
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The robotic ego-motion and the motion of moving obstacle were overlapped when an agricultural mobile robot need to detect the moving obstacle based on machine vision. So two images were taken from the mobile robot and the Harris feature points were extracted and matched. Then a bilinear model was applied to model the movement between the two images, and a least square optimization method was used to calculate the model parameters. A transformation matrix was obtained with this model to compensate the first image to eliminate the effect of the ego-motion of the mobile robot. Finally, a frame difference between the compensated image and the second image was carried out to detect the moving obstacle in the environment. Experimental results showed that this algorithm could eliminate the image movement caused by the ego-motion of the mobile robot, and the moving obstacles were able to be detected effectively with machine vision for the agricultural mobile robot.
 Number of references:9
 Main heading:Computer vision
Controlled terms:Agricultural machinery  -  Least squares approximations  -  Linear transformations  -  Mobile robots  -  Obstacle detectors
Uncontrolled terms:A-frames  -  Agricultural robot  -  Bilinear models  -  Ego-motion  -  Feature point  -  Least square optimization  -  Model parameters  -  Moving obstacles  -  On-machines  -  Transformation matrices
Classification code:681.3 Railroad Signals and Signaling  -  723.5 Computer Applications  -  731.5 Robotics  -  821.1 Agricultural Machinery and Equipment  -  921.3 Mathematical Transformations  -  921.6 Numerical Methods
 Database:Compendex
   
13. Accession number:20113614302306
 Title:Anti-pressing properties and crack formation law of corn seed
 Authors:Li, Xinping1 ; Li, Yuzhu1 ; Ma, Fuli1 ; Gao, Lianxing2
Author affiliation: 1  College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
2  College of Agricultural Engineering, Shenyang Agricultural University, Shenyang 110161, China
 Corresponding author:Gao, L. (lianxinggao@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:94-98
 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:For reducing mechanical damage of corn seed in the process of threshing and mastering the law on anti-pressing properties and crack formation of corn seed, static compresses experiment of various varieties corn seeds were carried out on LDS microcomputer control and electron draw-press test-machine. Results showed that the largest breaking power would decrease with the increasing of seed humidity ratio. The largest breaking power was the biggest with level-placing manner and in turn flank-placing manner took second place, perpendicular-placing manner was the smallest. Anti-pressing competence of various varieties corn seeds was different under same placing manners. The shape, position and law of crack in various surface loaded was different under different placing manners.
 Number of references:17
 Main heading:Seed
 Controlled terms:Agriculture  -  Cracks  -  Mechanical properties
Uncontrolled terms:Anti-pressing properties  -  Corn seeds  -  Formation law  -  Humidity ratio  -  Mechanical damages  -  Microcomputer control
Classification code:421 Strength of Building Materials; Mechanical Properties  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  821.4 Agricultural Products  -  951 Materials Science
 Database:Compendex
   
14. Accession number:20113614302326
 Title:Mathematic modeling and simulation of instantaneous cutting force for ball end milling
Authors:Wang, Qidong1 ; Liu, Zhanqiang1 ; Tang, Aimin2, 3 ; Wang, Shequan2 ; Xiao, Silai2, 3
Author affiliation: 1  Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Ji'nan 250061, China
2  Zhuzhou Cemented Carbide Cutting Tools Co., Ltd., Zhuzhou 412007, China
3  College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
 Corresponding author:Liu, Z. (melius@sdu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:200-206
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A dual-mechanism cutting force predicting modeling technique was proposed for eight ball end milling operations commonly applied on 3-axis CNC machine tools. The ball end milling was divided into a number of elementary cutting edges. Firstly, the local cutting forces within each elementary cutting edge were analyzed and modeled. Then, total cutting force could be calculated by integral operation. The effect of step-interval in cutting zones was taken into account for cutting force prediction. The number and distribution of the elementary cutting edges involved in cutting action could be instantaneously determined by geometric analysis. The numerical simulation was implemented by Matlab. Finally, the proposed model was validated through milling experiments of 45# steel. The results showed that there was a good agreement between the experimental results and the simulation ones.
 Number of references:10
 Main heading:Cutting tools
Controlled terms:Ball milling  -  Comminution  -  Computer control systems  -  Computer simulation  -  Machinery  -  MATLAB  -  Milling (machining)  -  Spheres
Uncontrolled terms:Ball end milling  -  CNC machine tools  -  Cutting edges  -  Cutting force  -  Cutting forces  -  Cutting zone  -  Dual mechanisms  -  Geometric analysis  -  Mathematic modeling  -  Modeling technique
Classification code: 723.5 Computer Applications  -  631 Fluid Flow  -  605 Small Tools and Hardware  -  604.2 Machining Operations  -  601 Mechanical Design  -  533.1 Ore Treatment  -  483 Soil Mechanics and Foundations
 Database:Compendex
   
15. Accession number:20113614302291
 Title:Evaluation regime of traction motor for hybrid electric vehicle
 Authors:Wang, Wei1 ; Wang, Qingnian2 ; Chu, Liang2 ; Dong, Xiuhui3
Author affiliation: 1  China Automotive Technology and Research Center, Tianjin 300162, China
2  State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
3  R and D Center, First Automobile Workshop, Changchun 130011, China
 Corresponding author:Wang, Q. (wqn@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:20-25
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to improve the accuracy and objectivity of the traction motor evaluation system of hybrid electric vehicle and make sure of the optimality performance for the motor, 23 evaluating indicators were listed according to the motor body design, performance of motor control and the driving cycle of vehicle. The traction motor performance evaluate system was established with the grey relation degree approach to multiple attribute decision making as evaluation method, and the motor bench test and computer simulation platform as instrument. At last, taking traction motors of hybrid electric bus of FAW as an example, the evaluation system was demonstrated. The results proved that the performance of motor could be determined by the evaluation system.
 Number of references:6
 Main heading:Electric traction
Controlled terms:Computer simulation  -  Decision making  -  Electric vehicles  -  Secondary batteries  -  Traction (friction)  -  Traction motors
Uncontrolled terms:Bench tests  -  Body design  -  Driving cycle  -  Electric bus  -  Evaluating indicators  -  Evaluation Method  -  Evaluation system  -  Gray relation degree  -  Grey relation degree  -  Hybrid electric vehicle   -  Motor control  -  Motor performance  -  Multiple Attribute Decision Making  -  Optimality
Classification code:682.1.1 Railroad Cars  -  702.1.2 Secondary Batteries  -  705 Electric Generators and Motors  -  705.3 Electric Motors  -  723.5 Computer Applications  -  912.2 Management
 Database:Compendex
   
16. Accession number:20113614302309
Title:Low temperature liquid separation technology of CO2 from biogas based on aspen HYSYS
 Authors:Zhou, Shuxia1 ; Dong, Yuping1 ; Zhang, Yulin2 ; Sun, Hongyu1
Author affiliation: 1  Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Ji'nan 250061, China
2  Shandong Green Energy Gas Industrial Co., Ltd., Heze 274000, China
 Corresponding author:Dong, Y. (dongyp@sdu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:111-116
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:According to the differences in physical properties between CO2 and CH4, the temperature and pressure of bubble point and dew point of the biogas with different volume fractions could be obtained with PR equation. Based on Aspen HYSYS, the liquefaction process of separating CO2 from biogas was designed. The effects of low temperature liquid separation on CO2 and CH4 from biogas were analyzed. The experiment of biogas purification was carried out and the result was consistent with that of simulation. The results of the experiment showed that the volume fraction of CH4 increased from 58.2% to 82.8%, the volume fraction of CO2 decreased from 36.4% to 8.8%, and the volume fraction of N2 O2 was less than 4.0%.
 Number of references:18
 Main heading:Carbon dioxide
Controlled terms:Biogas  -  Experiments  -  Liquids  -  Phase equilibria  -  Phase separation  -  Titration  -  Volume fraction
Uncontrolled terms:Aspen HYSYS  -  Bubble points  -  Dew points  -  Impurity separation  -  Liquefaction process  -  Liquid separation  -  Liquification process  -  Low temperatures  -  Vapor-liquid phase equilibrium
Classification code:522 Gas Fuels  -  641.1 Thermodynamics  -  801 Chemistry  -  804.2 Inorganic Compounds  -  901.3 Engineering Research  -  931.2 Physical Properties of Gases, Liquids and Solids
 Database:Compendex
   
17. Accession number:20113614302303
Title:Tension detection device for circular chain cargo transportation ropeway in mountain orchard
Authors:Wen, Tao1 ; Hong, Tiansheng1 ; Su, Jian1 ; Zhu, Yuqing1 ; Kong, Fanbo1 ; Chileshe, J.M.1
Author affiliation: 1  Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
　　Corresponding author:Hong, T. (tshong@scau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:80-84
 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 studying effects of different combinations of influential factors including payload variations, tension locations, loading approaches and motoring frequencies the circular chain cargo transportation ropeway imposes on the driving-chain in mountain orchards, a related device added to the ropeway system was designed to detect real-time dynamic variations for driving-chain tensions. The experimental results indicated that effects from the other three factors on the hoisting chain tension were obvious except for that from the motoring frequency. While the mechanical operator was adjusted to various locations, exclusively at the start and at the terminal, differences of mean tension variations were obtained ranging from 105.929 N to 164.641 N under different payloads. In addition, when the mechanical operator was adjusted to the commencing point, through either balanced loading or unbalanced loading approaches, mean tension variations were obtained ranging from 1165.351 N to 1425.864 N and 1140.500 N to 1435.353 N with related variation coefficients from 0.115 to 0.139 and 0.155 to 0.227, respectively.
 Number of references:7
 Main heading:Landforms
 Controlled terms:Loading  -  Orchards
Uncontrolled terms:Cargo transportation  -  Detection device  -  Driving-chain  -  Mountain orchards  -  Tension
Classification code:481.1 Geology  -  672 Naval Vessels  -  821.3 Agricultural Methods
 Database:Compendex
   
18. Accession number:20113614302302
 Title:Mixing uniformity of chemical and water in direct injection system
 Authors:Xu, Youlin1 ; Guo, Jingkun2 ; Zheng, Jiaqiang1
Author affiliation: 1  College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
2  Wuxi Dongfang Environment Engineering Research and Design Institute, Wuxi 214125, China
 Corresponding author:Xu, Y. (youlinxu@njfu.com.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:75-79
 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 high-speed imaging technology was applied to study the mixing uniformity of the mixer. The polystyrene was chosen as the tracing particle to follow the flow of the liquid pesticide. The mixing images were acquired with the changed work conditions of the pump. Then, the centroid coordinates of particles were obtained. At last, the results of the mixing performance were analyzed. It was found that the different work conditions of the pump and the distribution of the particles had different effects on the mixing performance. The results showed that when the particle centroid distribution of the tracing particle was closer to the normal distribution, the mixing performance was better. When the pump worked in a low speed, the mixing uniformity was getting better with the increasing of pump pressure. When the working pressure of the pump was constant, the mixing uniformity increased gradually as the speed of the pump increased.
 Number of references:8
 Main heading:Mixing
Controlled terms:Direct injection  -  Mixers (machinery)  -  Normal distribution  -  Polystyrenes  -  Pumps  -  Water injection
Uncontrolled terms:Crop protection  -  Different effects  -  High speed imaging  -  Low speed  -  Mixing image  -  Mixing performance  -  Particle centroid  -  Pump pressures  -  Tracing particle  -  Work condition   -  Working pressures
Classification code:922.1 Probability Theory  -  815.1.1 Organic Polymers  -  802.3 Chemical Operations  -  802.1 Chemical Plants and Equipment  -  618.2 Pumps  -  612.1 Internal Combustion Engines, General  -  521 Fuel Combustion and Flame Research
 Database:Compendex
   
19. Accession number:20113614302288
 Title:Gray prediction PID control technology of automated mechanical transmission clutch
 Authors:Yu, Tianming1 ; Zheng, Lei1, 2 ; Li, Song3
Author affiliation: 1  College of Automotive Engineering, Jilin University, Changchun 130025, China
2  R and D Center, China FAW Group Corporation, Changchun 130011, China
3  Department of Aviation Theory, Aviation University of Air Force, Changchun 130022, China
 Corresponding author:Yu, T. (ytm0406@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:1-6
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The underway and shift smoothly of automated mechanical transmission (AMT) vehicle are influenced by the clutch control property, it is difficult to be precisely handled by traditional PID control technology. The main reasons are the big hysteresis and nonlinear characteristics of clutch and actuation system. The gray prediction PID control technology in clutch control of AMT was analyzed. The control precision of clutch was improved by the proposed technology compared with traditional PID control technology. The gray prediction PID control could whiten certainly gray factors in the control system, improve the control quality and rubust of PID, and solve the problems of overrun and oscillation of clutch control. Thus, the underway and shift smoothly for vehicle were improved.
 Number of references:13
 Main heading:Quality control
Controlled terms:Automation  -  Clutches  -  Forecasting  -  Mechanical properties  -  Proportional control systems  -  Technology  -  Three term control systems  -  Two term control systems  -  Vehicle transmissions
Uncontrolled terms:Actuation systems  -  Automated mechanical transmissions  -  Clutch control  -  Control precision  -  Control quality  -  Gray prediction  -  Nonlinear characteristics  -  Shift quality
Classification code:921 Mathematics  -  913.3 Quality Assurance and Control  -  901 Engineering Profession  -  951 Materials Science  -  732 Control Devices  -  731 Automatic Control Principles and Applications  -  602.2 Mechanical Transmissions  -  731.1 Control Systems
 Database:Compendex
   
20. Accession number:20113614302311
Title:Non-destructive egg freshness recognition using multi-sensor fusion based on D-S evidence theory
 Authors:Liu, Peng1 ; Tu, Kang1 ; Pan, Leiqing1 ; Zhang, Wei1
Author affiliation: 1  College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
 Corresponding author:Tu, K. (kangtu@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:122-127
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For the purpose of enhancing the detecting stability and the model adaptability of egg freshness by non-destructive detection method, a sensor fusion was taken by the machine vision and electronic nose in the sensor level of characteristics while D-S evidence theory was chosen as the sensor information fusion method and BP artificial neural network as the specific modeling method. An improved method that could remedy for the deficiency of D-S evidence theory was discussed. Verification results showed that the basic probability assignment of uncertainty decreased to less than 0.01 by sensor fusion optimization. The problem of low detecting range in single sensor method has been well solved. Meanwhile, the egg freshness discriminating accuracy and stability has been improved compared with no sensor fusion situation. The average discriminating accuracy reached to 92.6%.
 Number of references:21
 Main heading:Sensors
 Controlled terms:Artificial organs  -  Computer vision  -  Neural networks
Uncontrolled terms:BP neural networks  -  D S evidence theory  -  Egg  -  Freshness  -  Multi-sensor fusion
Classification code:462.4 Prosthetics  -  723.4 Artificial Intelligence  -  723.5 Computer Applications  -  801 Chemistry
 Database:Compendex
   
21. Accession number:20113614302324
 Title:Multi-objective structural topology optimization for spot-welded layout
 Authors:Zhou, Zebin1 ; Kazuhiro, Saitou2 ; Yang, Jianguo1
Author affiliation: 1  College of Mechanical Engineering, Donghua University, Shanghai 201620, China
2  Department of Mechanical Engineering, University of Michigan, Ann Arbor 48105, United States
 Corresponding author:Yang, J. (JGyangm@gmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:189-194
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To solve the two-step process optimization problem, a method for synthesizing multi-objective structural topology optimization based on spot-welded layout was presented. Given an extended design domain with boundary and loading condition, the topology and geometry of an entire structure and the location and configuration of joints was optimized. A multi-objective genetic algorithm coupled with FEM analyses was used to obtain Pareto optimal solutions, the decision could be made for different demands.
 Number of references:11
 Main heading:Multiobjective optimization
Controlled terms:Genetic algorithms  -  Machine design  -  Spot welding  -  Structural optimization  -  Topology  -  Welding
Uncontrolled terms:Design domains  -  Design for manufacture  -  FEM analysis  -  Loading condition  -  Multi objective  -  Multi-objective genetic algorithm  -  Pareto optimal solutions  -  Spot-welded  -  Structural topology optimization  -  Two-step process
Classification code:538.2 Welding  -  538.2.1 Welding Processes  -  601 Mechanical Design  -  723 Computer Software, Data Handling and Applications  -  921 Mathematics
 Database:Compendex
   
22. Accession number:20113614302328
 Title:Design and experiment on bionic chewing equipment
 Authors:Sun, Zhonglei1, 2 ; Sun, Yonghai1 ; Wan, Peng3 ; Li, Junxing4
Author affiliation: 1  College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
2  Department of Life Science and Technology, Yangtze Normal University, Chongqing 408100, China
3  College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
4  Jilin Provincial Academy of Agricultural Machinery, Changchun 130025, China
 Corresponding author:Sun, Y. (sunyh@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:214-218
 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 bionic chewing equipment was developed for food breakdown by simulating the masticatory system and using the bionic technology. Some parts were designed and assembled by reverse engineering method, like bionic teeth and temporomandibular joints. The equipment could realize 3-D chewing motion, the movement parameters were determined. Test of occlusive force showed that chewing force of equipment could break food and change with food. Masticatory experiment showed that masticatory efficiency of the equipment had no significant difference with subjects and its maximum value was 92.3%. The bionic chewing equipment was stable and reliable.
 Number of references:9
 Main heading:Equipment
Controlled terms:Biomimetics  -  Bionics  -  Experiments  -  Mastication  -  Reverse engineering
Uncontrolled terms:Chewing forces  -  Chewing simulation  -  Masticatory efficiency  -  Masticatory system  -  Maximum values  -  Occlusive force  -  Temporomandibular joint
Classification code:461 Bioengineering and Biology  -  723 Computer Software, Data Handling and Applications  -  901 Engineering Profession  -  901.3 Engineering Research
 Database:Compendex
   
23. Accession number:20113614302292
Title:Coupling algorithm simulation and experiment of structure vibration characteristics for particle dampers
 Authors:Xia, Zhaowang1 ; Wen, Huabing1 ; Liu, Xiandong2
Author affiliation: 1  School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
2  School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
 Corresponding author:Xia, Z. (dlxzw@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:26-29
 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 particle damper is strongly nonlinear. The collisions and friction were existed between particles and particles, particles and cavity walls. A coupling simulation algorithm based on the combination of the discrete element method and the finite element method was presented to calculate the response of system with particle dampers. Comparison between the analytical and experimental results showed that simulation of the response of a cantilever plate with a particle damper was accurate. It showed that the response of the cantilever plate depended on the mass-fill ratio and particle density of the particle damper.
 Number of references:9
 Main heading:Damping
Controlled terms:Algorithms  -  Finite element method  -  Nanocantilevers  -  Plates (structural components)  -  Vibration analysis
Uncontrolled terms:Cantilever plate  -  Cavity wall  -  Coupling algorithms  -  Coupling simulation  -  Nonlinear  -  Particle dampers  -  Particle damping  -  Particle densities  -  Strongly nonlinear  -  Structure vibration   -  Vibration characteristics
Classification code:933 Solid State Physics  -  931.1 Mechanics  -  921.6 Numerical Methods  -  943.2 Mechanical Variables Measurements  -  921 Mathematics  -  723 Computer Software, Data Handling and Applications  -  408.2 Structural Members and Shapes  -  761 Nanotechnology
 Database:Compendex
   
24. Accession number:20113614302299
Title:Investigations on internal flow characteristics of impact sprinkler based on numerical simulation method
 Authors:Han, Wenting1, 2 ; van Lanh, Nguyen1, 3 ; Xu, Lin1
Author affiliation: 1  College of Mechanical and Electric Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
2  Institute of Water Saving Agriculture in Area Regions of China, Northwest A and F University, Yangling, Shaanxi 712100, China
3  Faculty of Engineering and Technology, Nong Lam University, Ho Chi Minh 70000, Viet Nam
 Corresponding author:Han, W. (hanwt2000@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:58-64
 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 geometric model of internal runner was constructed in Pro/E software. The internal flow field of the Rain Bird 30PSH impact sprinkler was conducted by using computational fluid dynamics (CFD) software Fluent with RNG k-Ε model at ten different pressure values and four types of range nozzle. Relationship between flow rate, inlet pressure and average velocity of outlet of range and spreader nozzle were evaluated. The results showed the flow rate of spreader nozzle was almost the same regardless of shifting the diameter of range nozzle. The distribution between range and spreader nozzle depended on the diameter of range nozzle was independent with inlet pressure. The average velocity magnitude of the range nozzle increased with the increasing of inlet pressure but spreader nozzle would not. The turbulent kinetic energy of range and spreader increased with the increasing of inlet pressure was independent with nozzle size. The standard deviation of static pressure, turbulent kinetic energy, velocity of range nozzle and static pressure of spreader nozzle were almost in direct proportion to inlet pressure. Biggish and irregular changing was happened to standard deviation of turbulent kinetic energy and velocity of spreader nozzle. Flow field visualization indicated that joint of runner and spreader nozzle had maximal static pressure.
 Number of references:9
 Main heading:Computational fluid dynamics
Controlled terms:Computer simulation  -  Computer software  -  Electron energy loss spectroscopy  -  Flow fields  -  Flow rate  -  Inlet flow  -  Kinetic energy  -  Kinetics  -  Numerical methods  -  Rocket nozzles   -  Spreaders  -  Statistics  -  Velocity  -  Visualization
Uncontrolled terms:Average velocity  -  Flowfield visualization  -  Geometric models  -  Inlet pressures  -  Internal flow characteristics  -  Internal flow field  -  Numerical simulation method  -  Pressure values  -  Pro/E software  -  Software FLUENT   -  Sprinkler  -  Standard deviation  -  Static pressure  -  Turbulent kinetic energy  -  With inlets
Classification code:922.2 Mathematical Statistics  -  921.6 Numerical Methods  -  902.1 Engineering Graphics  -  821.1 Agricultural Machinery and Equipment  -  931.1 Mechanics  -  801 Chemistry  -  723 Computer Software, Data Handling and Applications  -  631.1 Fluid Flow, General  -  631 Fluid Flow  -  723.5 Computer Applications
 Database:Compendex
   
25. Accession number:20113614302315
 Title:Flow resistance characteristics of scalariform perforation plates in plant xylem vessels
 Authors:Ai, Qinglin1 ; Xu, Fang1 ; Chen, Qi1 ; Chen, Jiaoliao1 ; Wang, Peng1
Author affiliation: 1  The Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, China
 Corresponding author:Xu, F. (fangx@zjut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:143-148 110
 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:Development of the flow model of scalariform perforation plates was introduced from domestic country to foreign country. The mathematics model of scalariform perforation plates was established. The simulation model of the flow in the region of scalariform perforation plates with different structures was established through Fluent software. From calculating and analyzing the simulation result, the influences of inclination angle of perforation plates, inner diameter of vessel, hole number, equivalent hole width to flow resistance coefficient were studied. The results showed that when other parameters were initialized, with the indination angle increasing, average flow was invariant, the drop of pressure on both side of perforation plates and flow resistance coefficient decreased at the beginning, and increased later. With the value of inner diameter increasing, average flow increased, the drop of pressure and flow resistance coefficient decreased. With hole number increasing, average flow was invariant, the drop of pressure and flow resistance coefficient increased. With equivalent hole width increasing, average flow was invariant, the drop of pressure and flow resistance coefficient decreased.
 Number of references:16
 Main heading:Flow simulation
 Controlled terms:Computer software  -  Plates (structural components)
Uncontrolled terms:Different structure  -  Flow model  -  Flow resistance characteristic  -  Flow-resistance coefficients  -  FLUENT software  -  Foreign countries  -  Hole number  -  Inclination angles  -  Inner diameters  -  Mathematics model   -  Simulation model  -  Simulation result  -  Xylem  -  Xylem vessels
Classification code:408.2 Structural Members and Shapes  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications
 Database:Compendex
   
26. Accession number:20113614302316
 Title:Interaction control system of agricultural machinery virtual test
Authors:Yuan, Yanwei1, 2 ; Zhang, Xiaochao2 ; Wu, Caicong1 ; Li, Jie2 ; Zhang, Shuai2 ; Bai, Liufang2
Author affiliation: 1  School of Earth and Space Sciences, Peking University, Beijing 100871, China
2  State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
 Corresponding author:Wu, C. (wucc@pku.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:149-153
 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:Virtual test interactive control methods was studied, agricultural machinery virtual test system was designed, experimental platform for field operating mode simulation and interactive control was built, and the drive of human and agricultural machinery in virtual environment was realized. To simulate the gestures of tractor driving, four degrees freedom simulation testing platform was built. Crop rows from virtual scenes were identified and control signals to control the tractor's speed and direction were gave. Results showed that the maximum deviation of roll angle was 0.34°, the maximum deviation of drift angle was 0.51°, elevation was 2.5 mm, and speed was 0.12 km/h. Physical prototyping and virtual prototyping were in good agreement.
 Number of references:16
 Main heading:Virtual reality
 Controlled terms:Agricultural machinery  -  Tractors (truck)  -  User interfaces
Uncontrolled terms:Control signal  -  Crop rows  -  Drift angle  -  Experimental platform  -  Interaction controls  -  Interactive control  -  Operating modes  -  Physical prototyping  -  Roll angle  -  Testing platforms   -  Virtual machines  -  Virtual prototyping  -  Virtual scenes  -  Virtual tests
Classification code:663.1 Heavy Duty Motor Vehicles  -  722.2 Computer Peripheral Equipment  -  723 Computer Software, Data Handling and Applications  -  821.1 Agricultural Machinery and Equipment
 Database:Compendex
   
27. Accession number:20113614302322
 Title:Recognition of pest damage for cotton leaf based on RBF-SVM algorithm
 Authors:Zhang, Jianhua1 ; Ji, Ronghua2 ; Yuan, Xue1 ; Li, Hui1 ; Qi, Lijun1
Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
2  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author: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:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:178-183
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on different symptoms on pest damaged cotton leaf including cotton aphid, cotton spider mites, cotton plant bugs, cotton leafworm and whitefly, the recognition system of pest damage for cotton leaf was presented. After collecting cotton images, the mottling areas with cotton spider mites, cotton plant bugs and whitefly were segmented by Otsu method in 2G-R-B color space. The mean value, variance value and skewness value of mottling areas were extracted on the R and (R G B)/3 bands as color features if mottling areas appear, and topological descriptors and Hu invariant moments were extracted as shape features. Two layers dual-tree complex wavelet was used to evaluate the texture features of cotton leaf. A support vector machine (SVM) classifier with radial basis function were employed to classify cotton aphid, cotton spider mites, cotton plant bugs, cotton leafworm, whitefly and normal cotton leaf. Experiment results showed that the classification accuracy was 88.1% when σ was 3.
 Number of references:15
 Main heading:Cotton
Controlled terms:Color  -  Computer vision  -  Program debugging  -  Radial basis function networks
Uncontrolled terms:Classification accuracy  -  Color features  -  Color space  -  Cotton aphid  -  Cotton plants  -  Dual-tree complex wavelets  -  Invariant moment  -  Mean values  -  Otsu method  -  Pest   -  Radial basis functions  -  Recognition systems  -  Shape features  -  Spider mite  -  SVM  -  Texture features  -  Topological descriptors  -  Two layers
Classification code:723 Computer Software, Data Handling and Applications  -  741.1 Light/Optics  -  741.2 Vision  -  819.1 Natural Fibers
 Database:Compendex
   
28. Accession number:20113614302301
 Title:Design and experiment of pesticide application monitoring system based on MCU
Authors:Zhai, Changyuan1 ; Zhu, Ruixiang1 ; Huang, Sheng1 ; Xue, Wenbin1 ; Ma, Yongbing1 ; Liu, Yuzhe1
Author affiliation: 1  College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
 Corresponding author:Zhu, R. (zrxjdxy2006@sohu.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:70-74 84
 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 pesticide application monitoring system was designed by using serial communication technology, database technology and VS2008 software programming technology based on MCU STC12C5A60S2. The system could collect information from eight analog sensors and two pulse sensors at the same time. The pesticide application parameter data from sensors (pressure sensor, flow sensor, speed sensor, etc.) would be displayed on LCD monitor, stored in SD card and transmitted to PC through RS232 serial port. Then the data will be stored into database and showed to users in the term of tables and graphs on PC as well. Experiments showed that while the sampling period was 1 s, the average measuring accuracy of speed was 97.7% after the system calibration, the average measuring accuracy of pressure in "test-bed experiment" and "sprayer experiment" was 99.3% and 98.7%, and the average measuring accuracy of flow was 99.3%.
 Number of references:12
 Main heading:Monitoring
Controlled terms:Computer systems programming  -  Experiments  -  Liquid crystal displays  -  Pesticides  -  Sensors
Uncontrolled terms:Analog sensors  -  Application monitoring  -  Application parameters  -  Database technology  -  Flow-sensors  -  LCD monitors  -  MCU  -  Measuring accuracy  -  Monitoring system  -  Sampling period   -  Serial communications  -  Serial port  -  Software programming  -  Speed sensors  -  System calibration  -  Variable pesticide application
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  901.3 Engineering Research  -  803 Chemical Agents and Basic Industrial Chemicals  -  801 Chemistry  -  741.3 Optical Devices and Systems  -  723.1 Computer Programming
 Database:Compendex
   
29. Accession number:20113614302295
 Title:Seed-counting system design using piezoelectric sensor
Authors:Zhang, Lin1 ; Zhao, Zuoxi1 ; Ke, Xinrong1 ; Feng, Xianchao1 ; Zhang, Zhigang1 ; Huang, Jian1
Author affiliation: 1  Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
 Corresponding author:Zhao, Z. (zhao_zuoxi@hotmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:41-45
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A seed-counting system was put forward with a cantilever beam detecting the impact of falling seeds, a piezoelectric sensor converting the impact into electrical signals, and a micro-controller counting and displaying seed counts. Based on the classical second-order transfer function model of the spring-mass-dashpot system, the natural frequency and damping ratio were analyzed. By using appropriate polymer material and signal conditioning, a testing system with proper damping ratio was constructed. The impact of a single seed became a single fast decaying pulse signal so that easy counting could be implemented. The experimental system showed the measurement error was less than 0.4% in single seed counting tests.
 Number of references:17
 Main heading:Sensors
Controlled terms:Cantilever beams  -  Damping  -  Electric sensing devices  -  Nanocantilevers  -  Piezoelectric transducers  -  Piezoelectricity  -  Pile foundations  -  Systems analysis
Uncontrolled terms:Damping ratio  -  Electrical signal  -  Experimental system  -  Piezoelectric sensor  -  Piezoelectric sensors  -  Polymer materials  -  Pulse signal  -  Second orders  -  Testing systems  -  Transfer function model
Classification code:961 Systems Science  -  933 Solid State Physics  -  931.1 Mechanics  -  801 Chemistry  -  761 Nanotechnology  -  732 Control Devices  -  704 Electric Components and Equipment  -  701.1 Electricity: Basic Concepts and Phenomena  -  483.2 Foundations
 Database:Compendex
   
30. Accession number:20113614302323
 Title:Structural similarity analysis in case retrieval using graph theory
 Authors:Hu, Wei1, 2 ; Hu, Guoqing1 ; Wei, Xin2 ; Xie, Xiaozhu2
Author affiliation: 1  School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China
2  Faculty of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
 Corresponding author:Hu, W. (huweigdut@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:184-188 206
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To deal with the functional relationship between mechanical product subsystems, a structural similarity computation model of product system by using directed fuzzy graph was proposed for product case retrieval during conceptual design. The concept of directed fuzzy graph was defined, and a directed graph model of product system was created and then represented by permanent matrix. Structural analysis of product system was conducted by using permanent function and the structural similarities of product system directed models were computed by combining subjective and objective weights. Finally, the case retrieval of SF2005 proved the applicability and effectiveness of the proposed similarity computation model.
 Number of references:10
 Main heading:Graph theory
Controlled terms:Conceptual design  -  Encoding (symbols)  -  Fuzzy sets  -  Fuzzy systems  -  Structural analysis
Uncontrolled terms:Case retrieval  -  Directed graph models  -  Functional relationship  -  Fuzzy graph  -  matrix  -  Mechanical product  -  Objective weight  -  Product systems  -  Similarity computation  -  Structural similarity
Classification code:408 Structural Design  -  408.1 Structural Design, General  -  723.2 Data Processing and Image Processing  -  921 Mathematics  -  921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
 Database:Compendex
   
31. Accession number:20113614302312
Title:Moisture content prediction modeling of hot-air drying for pressed peony based on BP neural network
 Authors:Zhu, Wenxue1 ; Sun, Shuhong1 ; Chen, Pengtao1 ; Chen, Zhihong1
Author affiliation: 1  College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China
 Corresponding author:Zhu, W. (zwx@mail.haust.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:128-130 137
 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:Pressed peony was made by hot-air drying method. The influence of temperature of hot-air, speed of hot-air, drying board's hole density and the initial mass of peony on drying speed was discussed. Relationship model between drying time, temperature of hot-air, speed of hot-air, drying board's hole density, the initial mass and moisture content was built by using BP neural network. Parameters in the proposed model were trained and simulated in Matlab. The results indicated that the simulated values of the drying moisture content were close to the measured values.
 Number of references:5
 Main heading:Neural networks
Controlled terms:Computer simulation  -  Drying  -  Mathematical models  -  Moisture  -  Moisture determination
Uncontrolled terms:BP neural networks  -  Drying speed  -  Drying time  -  Hole densities  -  Hot air  -  Hot air drying  -  Initial mass  -  Moisture contents  -  Peony  -  Prediction model   -  Prediction modeling  -  Relationship model
Classification code:642.1 Process Heating  -  723.4 Artificial Intelligence  -  723.5 Computer Applications  -  801.4 Physical Chemistry  -  921 Mathematics  -  944.2 Moisture Measurements
 Database:Compendex
   
32. Accession number:20113614302325
Title:Damping feed-forward closed-loop control for voice-coil fast servo actuator without velocity sensor
 Authors:Yang, Fan1 ; Dai, Yifan1 ; Wang, Guilin1
Author affiliation: 1  College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
 Corresponding author:Yang, F. (nudt804@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:195-199
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Low damping and large overshoot of voice-coil fast servoactuator (VCA) were its natural open-loop characteristics. In order to improve the dynamic performance and steady accuracy of VCA, a double closed-loop feedback control structure was used with a velocity loop and a position loop in classical control strategy. It was inevitable to add complexity and bring additional noise to fast tool servo (FTS) system for the use of velocity sensor. Based on the time-optimal control idea of the two order integrator series system, the damping feed-forward control method was put forward. The output damping could be improved by modulating the damping of input signal or the controlling signal through a time-optimal process (TOP) with no use of velocity sensor. The corresponding controlling projects were designed, dynamic performances were tested and typical microlens array was fabricated. The testing and experimental results indicated that the proposed damping feed-forward control method could improve the system damping effectively, the overshoot of square wave exciting response was 4% and the setting time was only 3 ms. The machined workpiece had better form accuracy and surface finish. The PV value of form error was only 0.228λ and the Ra of surface finish was less than 15 nm.
 Number of references:13
 Main heading:Closed loop control systems
Controlled terms:Damping  -  Feedback control  -  Finishing  -  Microactuators  -  Optimization  -  Position control  -  Sensors  -  Velocity
Uncontrolled terms:Classical control  -  Closed-loop control  -  Closed-loop feedback control  -  Dynamic performance  -  Fast tool servo  -  Feed-Forward  -  Form accuracy  -  Form errors  -  Input signal  -  Micro-lens arrays   -  Open loop characteristic  -  Position loops  -  Series system  -  Servoactuator  -  Setting time  -  Square waves  -  Surface finishes  -  System damping  -  Time optimal control  -  Time-optimal   -  Velocity loops  -  Velocity sensor  -  Voice coil motors  -  Voice-coil  -  Without velocity sensors  -  Work pieces
Classification code:931.1 Mechanics  -  921.5 Optimization Techniques  -  813.1 Coating Techniques  -  801 Chemistry  -  732.1 Control Equipment  -  731.3 Specific Variables Control  -  731.1 Control Systems
 Database:Compendex
   
33. Accession number:20113614302310
 Title:Kraft black liquor steam gasification with direct causticization
 Authors:Yuan, Hongyou1 ; Yin, Xiuli1 ; Li, Zhiwen1 ; Zhou, Zhaoqiu1 ; Wu, Chuangzhi1
Author affiliation: 1  Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, 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:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 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:Steam gasification of kraft black liquor char was performed at 860°C in a tube furnace with direct causticization using anatase titanium dioxide and recycled sodium tri-titanate. The organic carbon in the black liquor char could be completely gasified within 6 min, approximately equal to the complete conversion time of sodium carbonate in black liquor char to sodium penta-titanate at these conditions, and the generated dry gas had a high heating value of nearly 10 MJ/m3. The main component of solid product was sodium penta-titanate, and the sodium tri-titanate recycled from hydrolysis of sodium penta-titanate had satisfactory reactivity compared to fresh titanium dioxide. No agglomeration of solid product was observed through the process of reactions. About 20% of total sulfur in black liquor retained in the gasified residual solid in the form of non-reduced state.
 Number of references:20
 Main heading:Gasification
Controlled terms:Agglomeration  -  Kraft process  -  Organic carbon  -  Oxides  -  Pyrolysis  -  Recycling  -  Sodium  -  Sulfur  -  Titanium  -  Titanium dioxide
Uncontrolled terms:Anatase titanium dioxide  -  Black liquor  -  Conversion time  -  Direct causticizations  -  Dry gas  -  High heating values  -  Kraft black liquor  -  Main component  -  Residual solids  -  Sodium carbonate   -  Solid products  -  Steam gasification  -  Total sulfur  -  Tube furnaces
Classification code:811.1.1 Papermaking Processes  -  804 Chemical Products Generally  -  802.3 Chemical Operations  -  802.2 Chemical Reactions  -  549.1 Alkali Metals  -  542.3 Titanium and Alloys  -  452.3 Industrial Wastes
 Database:Compendex
   
34. Accession number:20113614302329
 Title:Bionic design of fertilizer sampling robot
 Authors:Tang, Qijing1 ; Zhao, Tieshi1 ; Bian, Hui1 ; Geng, Mingchao1
Author affiliation: 1  College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
 Corresponding author:Zhao, T. (tszhao@ysu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:219-223 227
 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 release the fertilizer production workers working in high dust and strong corrosive environment for a long time, a sampling robot was designed. By analyzing the using demand, robot's designing principles including characteristics of impact resistance, corrosion resistance, cleaning by itself, transmission mechanism built-in and drive away from the end piece installed was proposed. From the angle of bionics, the crab joints' structure characteristic was researched. Then sampling robot configuration was proposed. Bionics function and structure was designed. According to its operation condition, motion process and control plan was designed. After the parametric optimization, its feasibility was validated by simulation and impact test.
 Number of references:15
 Main heading:Machine design
Controlled terms:Bionics  -  Corrosion resistance  -  Electric network parameters  -  Fertilizers  -  Impact resistance  -  Robots  -  Shellfish
Uncontrolled terms:Bionic design  -  Corrosive environment  -  Crab  -  Designing principle  -  Fertilizer production  -  Impact test  -  Operation conditions  -  Parametric optimization  -  Robot configurations  -  Structure characteristic   -  Transmission mechanisms
Classification code:731.5 Robotics  -  703.1 Electric Networks  -  601 Mechanical Design  -  804 Chemical Products Generally  -  539.1 Metals Corrosion  -  461.1 Biomedical Engineering  -  421 Strength of Building Materials; Mechanical Properties  -  461.9 Biology
 Database:Compendex
   
35. Accession number:20113614302305
 Title:Response surface analysis of pickup losses in two-stage harvesting for rapeseed
 Authors:Wu, Chongyou1, 2 ; Ding, Weimin2 ; Shi, Lei1 ; Wang, Liqiang3 ; Jin, Chengqian1
Author affiliation: 1  Nanjing Research Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
2  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
3  School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
 Corresponding author:Ding, W. (wmding@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:89-93
 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 reduce the loss rate in picking up, parameters of pickup device with response surface analysis methods was studied. The results showed that main factors of impacting pickup loss rate were the moving speed, belt speed and conveyor inclination. The three factors gradation of importance was the moving speed, belt speed and conveyor inclination. Optimal group of parameters was the moving speed of 0.80 m/s, the belt speed of 0.78 m/s, the conveyor inclination of 11.19°, the optimal loss rate of 2.91%. Considering of parameters adjusting in actual conditions, recommended parameters were that the moving speed of 0.71 m/s, the belt speed of 0.80 m/s, the conveyor inclination of 12°.
 Number of references:10
 Main heading:Speed
Controlled terms:Conveyors  -  Oilseeds  -  Optimization  -  Pickups  -  Surface analysis
Uncontrolled terms:Loss rates  -  Moving speed  -  Picking up  -  Rapeseed  -  Response surface analysis  -  Response surface analysis methods  -  Two stage
Classification code:951 Materials Science  -  931.1 Mechanics  -  921.5 Optimization Techniques  -  821.4 Agricultural Products  -  752.3.1 Sound Reproduction Equipment  -  692.1 Conveyors  -  423 Non Mechanical Properties and Tests of Building Materials
 Database:Compendex
   
36. Accession number:20113614302314
 Title:Effects of emulsifying salts on functionality of mozzarella cheese
 Authors:Luo, Jie1 ; Wang, Fang2 ; Ren, Fazheng1 ; Guo, Huiyuan1
Author affiliation:1  Key Laboratory of Functional Dairy, Co-Constructed by Ministry of Education and Beijing Municipality, China Agricultural University, Beijing 100083, China
2  Beijing Higher Institution Engineering Research Center of Animal Product, Beijing 100083, China
 Corresponding author:Guo, H. (guohuiyuan99@gmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 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:Effects of two types of emulsifying salts on the functionality of Mozzarella cheese were studied. Trisodium citrate (TSC) and trisodium pyrophosphate (TSPP) were added to the stretching water at level of 1%, 3% and 5% during hot-stretching step, respectively. The main composition, textural properties, meltability and free oil content of the cheese prepared were measured, and the rheological behaviors of the cheese were also observed. The results showed that addition of TSC and TSPP significantly affected the meltability of the cheese. Also, hardness, cohesiveness and free oil content of the cheese increased (P<0.05). Meltability content was increased by 37.58% and 59.57% with TSC of 3% and TSPP of 3%, respectively. Addition of the emulsifying salts promoted solubilization of phosphate in the cheese, resulting in protein-protein interactions decreased and protein-water interactions increased. The results showed that addition of TSC and TSPP into stretching water could significantly improve the functionality of Mozzarella cheese.
 Number of references:17
 Main heading:Emulsification
 Controlled terms:Proteins  -  Rheology  -  Salts
Uncontrolled terms:Emulsifying salts  -  Free oil  -  Meltability  -  Mozzarella cheese  -  Protein-protein interactions  -  Rheological behaviors  -  Textural properties  -  Trisodium citrates
Classification code:802.3 Chemical Operations  -  804.1 Organic Compounds  -  931.1 Mechanics
 Database:Compendex
   
37. Accession number:20113614302327
Title:Crankshaft stress distribution based on different dynamic algorithms and lubrication parameters
 Authors:He, Zhenpeng1 ; Zhang, Junhong1 ; Zhang, Guichang1 ; Yang, Shuo1 ; Lü, Feng1
Author affiliation: 1  State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
 Corresponding author:Zhang, J. (zhangjh@tju.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:207-213 218
 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 engine crankshaft was investigated. The finite element method, dynamics method and lubrication theory were used to analyze the dynamic stress distribution of the crankshaft. At the same time, the nonlinear spring (NONL), dynamic hydraulic lubrication (HD) and elastic dynamic hydraulic lubrication (EHD) were used to analyze the crankshaft stress. Some parameters that influence on the stress distribution of the crankshaft were analyzed. The results showed that the stress distribution of crankshaft was different under different calculation models, because the torsional vibration and bending were different. At the same time, the stress caused by the contribution of torsional vibration and bending vibration in different sections at different times was different. Oil groove were also studied to investigate the influence that these parameters on the stress distribution based on the EHD model. It had little influence on the stress distribution. The value range was only -2.5~2.5 MPa.
 Number of references:8
 Main heading:Crankshafts
Controlled terms:Algorithms  -  Elastic waves  -  Finite element method  -  Hydraulics  -  Lubrication  -  Machine vibrations  -  Stress concentration
Uncontrolled terms:Bending vibrations  -  Calculation models  -  Dynamic algorithm  -  Dynamic algorithms  -  Dynamic stress  -  Engine crankshafts  -  Lubrication theory  -  Nonlinear springs  -  Oil groove  -  Torsional vibration
Classification code:921 Mathematics  -  751.1 Acoustic Waves  -  723 Computer Software, Data Handling and Applications  -  632.1 Hydraulics  -  921.6 Numerical Methods  -  607.2 Lubrication  -  601.2 Machine Components  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties  -  601.3 Mechanisms
 Database:Compendex
   
38. Accession number:20113614302320
 Title:Overlapped grapes berry size inspection based on image contour analysis
 Authors:Chen, Ying1 ; Li, Wei1 ; Zhang, Junxiong1
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Chen, Y. (cy@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:168-172 121
 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:An algorithm was presented to detect size of berries on grapes bunch. Firstly, the contour curves of the grapes bunch were extracted by contour tracking. Then concave points were detected by rotating the curve continuously and searching local extremum points so that the curves were divided into circular arcs, in which each arc corresponds to one berry of the grapes. Finally, the least-square curve fitting method was applied to calculate the radius of the berries. Experiments of Jufeng grapes showed that by using the presented method, about 35% berries on a grapes bunch could be recognized. In the estimation of average berry radius of a bunch, the average error was 0.61 mm, the maximum error was 1.69 mm and berry size grading accuracy was 72.7%.
 Number of references:12
 Main heading:Fruits
 Controlled terms:Curve fitting  -  Image processing  -  Least squares approximations
Uncontrolled terms:Average errors  -  Berry size  -  Circular arc  -  Cluster  -  Contour tracking  -  Grapes  -  Image contour  -  Least Square Curve Fitting  -  Local extremum  -  Maximum error   -  Size inspection
Classification code:741 Light, Optics and Optical Devices  -  821.4 Agricultural Products  -  921.6 Numerical Methods
 Database:Compendex
   
39. Accession number:20113614302298
Title:Mechanism analysis and motion simulation of planting apparatus with automatic distributing bowl mechanism for transplanter
 Authors:Chen, Da1 ; Zhou, Liping2 ; Yang, Xuejun1
Author affiliation: 1  State Key Laboratory of Soil-Plant-Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
2  Institute of Mechatronics Technology and Application, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
 Corresponding author:Yang, X. (camms@263.net)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:54-57 69
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An automatic distributing bowl planting apparatus was proposed. The planting-bowl, planting apparatus and the movement trajectory of bowl seedling were analyzed and simulated. The simulation showed that two manipulators could cooperate perfectly and the planting apparatus could distribute bowl seedlings automatically. By field experimentation, the planting angle was from 88.08° to 88.34°. Its coefficient of variation was from 2.37% to 2.92%. The planting row spacing was from 350.67 mm to 351.17 mm. Its coefficient of variation was from 1.42% to 1.60%. It showed that the planting apparatus could be operated normally and hardly be affected by the speed.
 Number of references:9
 Main heading:Equipment
Uncontrolled terms:Automatic distributing bowl  -  Coefficient of variation  -  Field experimentation  -  Mechanism analysis  -  Motion simulations  -  Movement trajectories  -  Planting apparatus  -  Row spacing  -  Transplanter
 Classification code:901 Engineering Profession
 Database:Compendex
   
40. Accession number:20113614302289
 Title:Design and application of heavy truck AMT system
 Authors:Liu, Zhenjun1 ; Qin, Datong1 ; Hu, Jianjun1
Author affiliation: 1  The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
 Corresponding author:Liu, Z. (liuzj@cqu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:7-14
 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:Automated mechanical transmission (AMT) control system for heavy vehicle was developed based on dSPACE control. Hardware development, automatic code generation, vehicle calibration and testing were carried out based on V-type development process. Hydraulic control system, gear shifting actuator and clutch automatic control system for AMT were designed. The control strategy was confirmed. The development of control software was accomplished. Vehicles calibration and control performance testing based on the 12-gear MT of heavy truck platform were performed. The results showed that the heavy vehicle AMT based on the dSPACE achieved the expected goal. The software development and vehicle parameters calibration could be controlled. Thus, the repeated work could be diminished in design, development and the process of testing to typing, so that the development cycle could be accelerated.
 Number of references:11
 Main heading:Process control
Controlled terms:Automatic programming  -  Automation  -  Calibration  -  Control  -  Control theory  -  Hydraulic machinery  -  Software design  -  Trucks  -  Vehicle transmissions  -  Vehicles
Uncontrolled terms:Automated mechanical transmissions  -  Automatic code generations  -  Control performance  -  Control software  -  Control strategies  -  D-space  -  Design and application  -  Development cycle  -  Development process  -  Gear shifting   -  Hardware development  -  Heavy truck  -  Heavy vehicle  -  Hydraulic control systems  -  Vehicle parameters
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  731.1 Control Systems  -  731 Automatic Control Principles and Applications  -  723.1 Computer Programming  -  663.1 Heavy Duty Motor Vehicles  -  632.2 Hydraulic Equipment and Machinery  -  602.2 Mechanical Transmissions  -  432 Highway Transportation
 Database:Compendex
   
41. Accession number:20113614302294
 Title:Embedded double-position throwing seeds dibbler
 Authors:Liu, Fang1 ; Du, Ruicheng2
Author affiliation: 1  Department of Electrical and Mechanical Engineering, Heze University, Heze 274000, China
2  School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
 Corresponding author:Du, R. (drc@sdut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:35-40 29
 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 dibbler with embedded double-position throwing seeds was presented. Variable seed-metering device on the position was layout in the center of helm-shaped wheel for shortening the distance of dropping seeds and omitting gearing device. Boring and caving device was composed with fixed part and rotatable part, always closed in the state of non-opening. Based on the lever principle, rotatable part was opened when the most depth in the soil was reached. The second lower position throwing seeds was completed, and then rotatable part was came up out of soil and closed. The experiment results showed that the proposed dibbler could meet the design and agriculture requirements.
 Number of references:19
 Main heading:Seed
 Controlled terms:Boring  -  Wheels
Uncontrolled terms:Dibbler  -  Digger of boring and caving  -  Double-position throwing seeds  -  Embedded  -  Hill-drop planter
Classification code:601.2 Machine Components  -  604.2 Machining Operations  -  821.4 Agricultural Products
 Database:Compendex
   
42. Accession number:20113614302313
 Title:Effects of different drying methods on quality of Eucommia ulmoides male flower tea
 Authors:Dong, Juane1 ; Fu, Zhuorui2 ; Ma, Xihan3 ; Mo, Kailin2 ; Xia, Guangdong4
Author affiliation: 1  College of Life Sciences, Northwest A and F University, Yangling, Shaanxi 712100, China
2  Institute of Forest Products Processing and Using, Sichuan Academy of Forestry, Chengdu 610066, China
3  College of Sciences, Northwest A and F University, Yangling, Shaanxi 712100, China
4  Xi'an Lujun of Technology, Xi'an 710108, China
 Corresponding author:Ma, X. (maxh@nwsuaf.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:131-137
 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:Based on the combination of sensory evaluation and the measurement of functional constituents contents, a comparative study was carried out on the effects of different drying processes on the quality of Eucommia ulmoides male flower tea. The results showed that microwave drying exhibited high efficiency. The functional constituents in the flower could be farthest maintained. The sensory quality was also satisfactory, making it the first choice in drying Eucommia ulmoides male flower tea. Oven drying could also keep the functional constituents in the flower. The sensory quality was also sound, but its efficiency was low, making it the second choice in drying Eucommia ulmoides male flower tea. Pan parching, a traditional method to process conventional tea, seriously destroyed the functional constituents, the sensory quality was poor, and the process was difficult to control, indicating that it was not suitable to dry Eucommia ulmoides male flower tea.
 Number of references:16
 Main heading:Drying
 Controlled terms:Ovens  -  Stoves
Uncontrolled terms:Comparative studies  -  Drying methods  -  Drying process  -  Eucommia ulmoides  -  High efficiency  -  Its efficiencies  -  Male flower tea  -  Microwave drying  -  Oven drying  -  Pan parching   -  Sensory evaluation  -  Sensory qualities
Classification code:642.1 Process Heating  -  642.2 Industrial Furnaces and Components  -  822.1 Food Products Plants and Equipment
 Database:Compendex
   
43. Accession number:20113614302330
 Title:Microstructure and nanoindentation properties of mouthparts of oriental mole cricket
 Authors:Gao, Hang1 ; Li, Yuzhu1 ; Tong, Jin2 ; Sun, Jiyu2
Author affiliation: 1   College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
2  Key Laboratory for Bionics Engineering, Ministry of Education, Jilin University, Changchun 130025, China
 Corresponding author:Tong, J. (jtong@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:224-227
 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 surface and the section geometrical structure features and element of the mouthparts of the oriental mole cricket were examined by scanning electron microscopy (SEM) and energy spectrometer. The mouthparts cuticle contained many kinds of metallic elements and microelements. It was found that there existed a hollow structure in the mouthparts and the material of the section displayed sandwich structure. The structure of the mouthparts was modeled with the slice method. The hardness and elastic modulus of the mouthparts cuticle of the oriental mole cricket were obtained by nanomechanical test system. The results showed that the hardness and elastic modulus of the mouthparts cuticle material was high. It was found through comparison that the hardness of the mouthparts of the oriental mole cricket was higher than that of the female clypeus.
 Number of references:12
 Main heading:Microstructure
Controlled terms:Elastic moduli  -  Hardness  -  Metallic compounds  -  Nanoindentation  -  Scanning electron microscopy  -  Trace elements
Uncontrolled terms:Energy spectrometer  -  Geometrical structure  -  Hardness and elastic modulus  -  Hollow structure  -  Metallic elements  -  Microelements  -  Mole cricket  -  Mouthparts  -  Nanomechanical tests  -  Oriental mole cricket   -  Slice method
Classification code:951 Materials Science  -  933 Solid State Physics  -  804 Chemical Products Generally  -  801 Chemistry  -  761 Nanotechnology  -  741.1 Light/Optics  -  712 Electronic and Thermionic Materials  -  423 Non Mechanical Properties and Tests of Building Materials  -  421 Strength of Building Materials; Mechanical Properties
 Database:Compendex
   
44. Accession number:20113614302308
Title:Thermodynamic analysis of hydrogen production by aqueous phase reforming of three model compounds in bio-oils
 Authors:Xie, Jianjun1, 2 ; Yin, Xiuli1, 2 ; Su, Deren1, 2 ; Wu, Chuangzhi1, 2 ; Zhu, Jingxu3
Author affiliation: 1  Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2  Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China
3  Department of Chemical Engineering, University of Western Ontario, London N6A5B9, Canada
 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:42
 Issue:8
 Issue date:August 2011
 Publication year:2011
 Pages:104-110
 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:Thermodynamic analysis employing Gibbs free energy minimization for aqueous phase reforming of three model compounds in bio-oils for hydrogen production was presented. Effect of temperature (340~660 K) and pressure ratio psys/pH2O (0.1~2.0) on H2 and CH4 selectivity, carbon formation and conversion of model compounds were calculated. The results showed that when considering both methanation and carbon formation reactions, the conversion of the model compounds were over 99.99% and no carbon formation was found, but mathanation was far more thermodynamically favorable than hydrogen production reaction. H2 selectivity were greatly improved without mathanation. Further analysis showed that the H2 production mechanism was mainly related to directly cracking of model compounds other than to aqueous reforming reaction, however, it was found that about 0.999, 1.940, 1.999 mole solid carbon formed when feeding per mole of methanol, acetic acid and ethylene glycol in the inlet streams. After restricting both mathanation and carbon formation reaction in the system, aqueous phase reforming of methanol, acetic acid and ethylene glycol at temperature of 500 K and psys/pH2O of 1.1 could achieve H2 selectivity of 74.98%, 66.64%, 71.38%, and the conversion of the feedstocks were over 99%.
 Number of references:13
 Main heading:Hydrogen production
Controlled terms:Acetic acid  -  Ethylene  -  Ethylene glycol  -  Hydrogen  -  Methanol  -  pH  -  Pressure effects  -  Thermoanalysis  -  Thermodynamic properties
Uncontrolled terms:Aqueous-phase reforming  -  Bio-oils  -  Carbon Formation  -  Effect of temperature  -  Gibbs free energy minimization  -  Hydrogen production reactions  -  Model compound  -  Pressure ratio  -  Production mechanisms  -  Solid carbon   -  Thermo dynamic analysis  -  Three models
Classification code:931.1 Mechanics  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  801.1 Chemistry, General  -  801 Chemistry  -  641.1 Thermodynamics  -  522 Gas Fuels
 Database:Compendex
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