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Volume，Issue4，2002

  • An Approximate Solution on a Sphere Moving Parallel to a Plane of an Interstitial Power-Law Fluid

    Issue 4, (2002)
    Abstract：The approximate pressure equation for a sphere moving parallel to a plane of an interstitial Power Law fluid was derived according to Reynolds' lubrication theory. The approximate expression of the tangential viscous force and torque were obtained and the corresponding fitting expression was developed. Compared with Goldman's asymptotic solution for a Newtonian fluid, the presented numerical solution could be reduced to Goldman's result when the power index equals 1, and is more accurate.  
    Keywords：Distinct Element Method,agglomerate,Power Law fluid  
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    Updated：2024-02-27

  • Chemical Modification of Poly(Styrene-co-maleic Anhydride) by 2-amino-benzimidazol

    Issue 4, (2002)
    Abstract：The poly(styrene co maleic anhydride)(SMA) was modified by some fluorescent organic molecules 2 amino benzimidazol to prepare the fluorescent polymers(SMI). These polymers were characterized by FT IR spectra, UV spectra, Fluorescent spectra, DSC and GPC. They not only kept the excellent properties of SMA but also possessed higher thermal stability. The influences of solvents, acidty and quenching agents on the fluorescence of these polymers were investigated. This is a convenient method to produce the fluorescent materials.  
    Keywords：chemical modification of SMA,fluorescent polymer,2 amino benzimidazol  
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    Updated：2024-02-27

  • Study on Effect of Ozone on Chlorothalonil

    Issue 4, (2002)
    Keywords：ozone,chlorothalonil,decompose  
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    Updated：2024-02-27

  • Fitting the Equation to Data for Spherical Agricultural Material''s Re-C Relation Curve Based on ANFIS

    Issue 4, (2002)
    Abstract：The defects of the traditional method used to solve and calculate the resistance coefficient of spherical agricultural material are pointed out, and the new model, being based on ANFIS, is rebuilt to accomplish the accurate fit of ReC curve. The comparisons of the new and the traditional method indicated that the trained ANFIS can respectably recur the functional relation between Re and C . It is reliable to get the resistance coefficient with the help of the fit curve.  
    Keywords：agricultural material,resistance coefficient,Renault number,ReC relation curve,ANFIS  
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    Updated：2024-02-27

  • Experiment Study on 2ZPY-H530 Rice Potted-seedling Transplant

    Issue 4, (2002)
    Abstract：The 2ZPYH530 Rice Potted seedling Transplanter that was researched, produced and tested on the field. The manufacture and transplanting quality were compared with rice transplanting by hand. The test results showed that the design of mechanism is reasonable, and the working function is quite steady. The orderly transplanting, the crop reasonable plant and row spacing were good, which are benefit to the ventilation, for getting light and field management. Machine planting rice can resist falling down, and have higher yield and fuller spic. The machine operation has higher efficiency and lower cost.  
    Keywords：rice,transplanter,potted seeding transplanting in row  
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    Updated：2024-02-27

  • A Monolithic Micro-computer System for Planter Performance Measurement and Graphic Printing Output

    Issue 4, (2002)
    Abstract：To meet the needs of the planter study and appraising, a measuring system of planter seeding performances based on 8031 monolithic micro computer was developed. Combine with different sensors, the detecting functions of this system include the seed space uniformity of metering device, the rotate speed of the axis of metering device, the velocity of tractor, the slippage of planter wheel and the width of the signal pulse. The processes to the test data are statistic, calculation, display and printing. The special printings are speed curve, data distributing and especially the simulating graph of seeds distribution on the field.  
    Keywords：planter,monolithic micro computer,metering detection  
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    Updated：2024-02-27

  • Mathematical Model of Distribution of Water Application Rate With Punched Thin-soft Spray Tape

    Issue 4, (2002)
    Abstract：The character of water distribution with punched thin soft spray tape was studied. According to the obtained data from punched thin soft spray tape and single hole sprinkling trial(designed trial angle of sprinkling water is from 10 degree to 90 degree), certain non linear mathematical models of punched thin soft spray tape single hole of distributing water of single apex and double apices are made by using data fitting method of DUD arithmetic. Except 10 degree and 90 degree sprinkle angle, the fitting precision of all double apices is evidently higher than that of single apex. Judging from regression square sum of fitting model and residual square sum, it can be seen that all fitting precision was very high, and adopting non linear maths model can completely depict the character of the distribution of water application rate with punched thin soft spray tape. It is greatly instructive for making sure soil water moving distribution and optimizing the design of the punched thin soft spray tape apparatus instruments.  
    Keywords：punched thin soft spray tape,distribution of water application rate,mathema tical mode,DUD arithmetic  
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    Updated：2024-02-27

  • Study on Environmental Control Technology of Some Unlimited Growth Tomato in Greenhouse by DFT

    Issue 4, (2002)
    Abstract：The unlimited growth cultivation mode was developed for tomato grows under DFT condition in greenhouse, the information of growing process of the crops and the control mode of trunk form were presented. By researching on the environmental in greenhouse and the control technique of the nutrient solution root system microenvironment, the environmental control mode based on the kind of cultivation mode was developed. The experimental results showed that greenhouse environmental control technology fits for this cultivation mode especially for the environmental requirement of growing crops, at the meantime, it can ensure the tomato to produce fruit and pick them in a certain time.  
    Keywords：environmental control,deep flow technique of nutrient solution,unlimited growth  
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    Updated：2024-02-27

  • Optimization of Technology of Ni-P-SiC Composite Deposit

    Issue 4, (2002)
    Keywords：chemical plating,composite deposit NiPSiC,orthogonal design,optimum  
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    Updated：2024-02-27

  • Hydraulic Performance of X-type Blade Used in France Turbine

    Issue 4, (2002)
    Abstract：X type blade is a new concept of runner design. The analysis and results on X type blade based on numerical simulation were developed. It was identified that X type blade inlet has a negative blade angle, special profiles near crown and outlet edge not lying on meridian plan. Fluid flowing benefit from above geometric feature and tend to be more fluent and evenly distributed. "Cross flow" often observed in conventional blade pressure side is removed under most conditions. Load across blade from crown to band is balanced. All these characteristics showed that X type blade has potentials in improving efficiency, increasing discharge or improving cavitation performance and giving better strength condition.  
    Keywords：francis turbine,X type blade,hydraulic performance,  
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    Updated：2024-02-27

  • On-the-spot Research on Load-rejection Transient of the Francis Turbine Installation in the Shiban Hydropower Plant

    Issue 4, (2002)
    Keywords：hydropower plant,turbine,transient,instantaneous behavior,  
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    Updated：2024-02-27

  • Design on the Limnetic Crab Culture Expert System Based-on Web

    Issue 4, (2002)
    Abstract：The limnetic crab culture expert system was developed. According to the Feasibility Analysis, Object Analysis and Culture process Analysis, the designing of knowledge base, inference engine, database, model base and its management system were developed. With the prevalent intranet techniques in the world and 5 modules such as artificial culturing, crab seeds raising, crab farming, bait feeding, disease curing, were integrated with the tools of Visual InterDev?Dhtml?MSDN?IESDK?Java Script?VB Script?SQL Server 7 0?ASP and Photoshop 5 0. This expert system enlightens an entire new area in the limnetic crab culture expert system, many performances such as crab farming forecasting, decision supporting, information counseling and technique extending have been realized.  
    Keywords：crab,farming,expert system,based on web  
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    Updated：2024-02-27

  • Using VC++6.0 and 80C196KC Single-chip Microcomputer to Realize the Integrated Control of the Simulated Tractor-implement Combination

    Issue 4, (2002)
    Abstract：The function and work principle of simulation control system were introduced. The simulated set of tractor implement combination was composed of center monitor, engine & transmission control sub system, suspension & load control sub system and electric eddy current dynamometer control sub system, which are connected in a distributed integration control system with RS 232C and Data Acquisition & Control Card. It is a control system with response lag. The information exchange among the control sub systems was completed by serial communication. Using MSComm control in the Visual C++6 0 environment by making a reasonable communication protocol between master PC and slave Microprocessors, program to realize distribute integrated control of the simulated tractor implement combination with serial communication. The experiment result showed that the control system have a good control characteristics and meet the experimental needs. This method has a utility significance for study of tractor implement control system.  
    Keywords：visual C++6 0,MSComm control,serial communication,80C196KC single chip microcomputer,simulated tractor implement combination,integrated control  
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    Updated：2024-02-27

  • Study and Implementation of Dynamic Perception Algorithm in Security Recorder System

    Issue 4, (2002)
    Abstract：The dynamic perception algorithm was designed for a security recorder system. Including the algorithm, the system can record only those pictures that are quite different from the previous ones. In this way, a great deal of storage space is saved. At the same time, any pictures that make sense are not missed. The algorithm is based upon a lot of scientific experiments, which makes it credible. It is efficient enough to give a real time result. With its friendly interactivity, it can also be used to many other applications where only motion pictures are noticed.  
    Keywords：dynamic perception,algorithm,security recorder system,  
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    Updated：2024-02-27

  • Image Compression Based on Integer Wavelet Transforming and Improved Zero Tree Encoding

    Issue 4, (2002)
    Abstract：An approach to compress images using Integer Wavelet Transforming (IWT) was described, which is more suitable for image compression. An image from time domain to wavelet domain was transformed through Integer Wavelet Transforming. Those coefficients with improved zero tree encoding were encoded. Wavelet Difference Reduction algorithm which is an image codec based on index coding. Finally, experimental results were listed compared with EZW compression method. The results indicate that it is efficient in image compression to combine Integer Wavelet Transforming with improved zero tree encoding. The method can decrease the computing time and improve the Peak Signal no Noise Ratio to some extent.  
    Keywords：integer wavelet transforming,zero tree encoding,image compression,peak signal to noise ratio,algorithm  
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    Updated：2024-02-27

  • Study on Identifying Measurement About Default of Fruit in Computer Vision

    Issue 4, (2002)
    Abstract：The default on fruit face was identified by computer vision information. A new method to divide up and to identify default was presented. The character of fruit was considered. The division of default about different gray degree was successful at one time. The three dimensional character of fruit was utilized during identifying. The difference among default, stem end and calyces was found. By experiment, the speed of detection was very fast, and the accurate rate of detection is very high. The requirements of detection on line of computer vision.  
    Keywords：computer vision,identify,default  
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    Updated：2024-02-27

  • Development of Field Management Geographic Information System by VC++

    Issue 4, (2002)
    Abstract：The advantage and the disadvantage of existing professional development tools of GIS(such as the advantage of better developing platform, good security, learning simply and easily, the disadvantage of badly extensible, high need of software and hardware, no system copyright) were analysed. The method of developing field management geographic information system from basis was provided by using VC++ platform. The vector graphics system of basic field management GIS was implemented, the attribute database management system was accomplished, the two orient connection system between the vector graphics system and the attribute database system were described by VC++ platform in Windows 98 operation system. The system can provide the drawing of basic graphic element, the connection with attribute database, and meet the basic need of the field management.  
    Keywords：GIS,vector graphics system,database management system  
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    Updated：2024-02-27

  • Engine Virtual Test System Used in Vehicle Power Train

    Issue 4, (2002)
    Abstract：A method of construct virtual test system based on a model of engine dynamic performance was brought forward by using engine's characteristics, the construction of hardware was analyzed and the software was developed. By useing the model, Engine's state and fuel oil consumption can get by following the tracks of the change of engine's output along with the throttle and the load of vehicle.  
    Keywords：vehicle,engine characteristic,Virtual Test System,  
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    Updated：2024-02-27

  • Study on the E-business System of Agricultural Equipmental Enterprises

    Issue 4, (2002)
    Abstract：According to the BTOC model based on internet, an E business system model for agricultural equipmental enterprises was set up. Considering order, order form determina tion and distribution, the application of E business system in agricultural equipmental enterprises was developed. This application system consists 6 managemental sub system, i.e. exhibition & order of products, distribution, store house, settlement, returned goods treatment and stastical analysis.  
    Keywords：agricultural equipment,E business,payment,distribution  
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    Updated：2024-02-27

  • Design of a Vehicle Management System Based on CAN Bus

    Issue 4, (2002)
    Abstract：The CAN bus is an advanced serial communication network which supports distributed real time control with a very high level of security, and is used widely in overseas vehicle now. A kind of hardware design of vehicle management system based on CAN bus is introduced. Especially it was focused on the total configuration design, design of the distribution and interface circuit of the node, as well as the interface circuit of the gateway. The function of each node, the selection of the CAN controller and the CAN transceiver were also introduced.  
    Keywords：vehicle,vehicle management system,CAN bus,hardware design  
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    Updated：2024-02-27

  • Method of Producing Targeting Liposome With Supercritical Fluid Technology and Liposome Surface Morphology

    Issue 4, (2002)
    Keywords：targeting liposome,SOD,supercritical fluid,percentage of burying  
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    Updated：2024-02-27

  • Using PIV Method to Measure Flow Field in Model Cistern of Large-scale Pumps Station

    Issue 4, (2002)
    Abstract：To the question of the frequent appearance of cavitations in the pumps used in the large scale waterworks, combining with the real working surroundings of pumps station in the Beijing Ninth Water Supply Plant, the cistern model by appropriate scale was set up, take advantage of the PIV measuring technology to measure and analyze the flow field in the cistern model. According to the experiment result, the impact on the cavitations in pumps caused by the inapposite structure disposition of input and output of pipe and run time impropriety of insufficient submerge depth was analyzed, advices for the cistern design are as follows: input and output of pipe in cistern should be arranged correspondingly; the entrance plane of input pipe in cistern should be parallel to the underside of cistern.  
    Keywords：cistern,PIV,flow mesurement,cavitation,  
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    Updated：2024-02-27

  • Rapid Testing Methods for Estimating the Nutrient Value in Animal Slurry

    Issue 4, (2002)
    Abstract：different equipment and their working principle for rapid testing the nutrient value in animal slurry (Slurry Meter, Conductivity Meter, Ammonia Electrode, Slurry Nitrogen Meter, Reflectometer and In situ Nutrient Sensor System) were introduced. Their testing precision and suitability were described. A comparation of above different equipment was made. Comparing with the traditional test method, the advantages of the fast testing method are the simplicity of testing, fast speed for measurement and valuable to extend. The slurry meter and conductivity meter can be used to measure the content of N,P,K and so forth. The measurement accuracy, however, of potassium is something low. Rapid testing method set strict demands for the operation environment. The cost of test equipment is high. The stability of the test result is not good and the testing accuracy for solid slurry is unsatisfactory.  
    Keywords：animal slurry,nutrient value,content,rapid testing equipment  
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    Updated：2024-02-27

  • Identifiction Method of Risk Factors and Improvement Measures in Project Financial Analysis

    Issue 4, (2002)
    Abstract：The sensitive analysis method used in determining main risk factor has a significant default in investment project financial analysis. By means of example analysis, the research results showed that the reason causing the default is without considering the real affection of these factors on net present value, and a more better method--the sensitive extreme difference analysis method was developed in which the real changing degree of every factor with the sensitive degree was combined to praise norms of every factor and considers the possibility of taking place risk caused by every factor.  
    Keywords：project investment,financial analysis,risk analysis,  
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    Updated：2024-02-27
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