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Volume，Issue6，2001

  • Demonstration Analyses on TVP''''s Economies of Scale

    Issue 6, (2001)
    Abstract：TVP's present scale of running is investigated. The comprises inherence connection between running scale and economic benefits of large and medium enterprise, status and state of every industries' scale economies were analysed and demonstrated. Some proposals are brought about, such as optimizing industrial organization structure, and promoting modern corporation and enterprise' group's founding, etc.  
    Keywords：township and village enterprises,scale of running,economies of scale  
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    Updated：2024-02-27

  • Influence Factors and Fuzzy Assessment of Real Estate Market Risk

    Issue 6, (2001)
    Abstract：With the whole economy recovery, the industry of real estate will meet a new quick developing period. But there are many uncertainty and risky factors, which result in the heavy risk existing in real estate market. In this paper, various factors that affected market risk of real estate and influence mechanism are analyzed from both supply and demand of market. The fuzzy assessment method is introduced in order to estimate the market risk of real estate, and market risk assessment model is established by multi analyzing twelve affecting factors. Therefore, the size of market risk is quantified.  
    Keywords：real estate,market risk,fuzzy assessment  
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    Updated：2024-02-27

  • Practical Analyzing of Exchange Rates'''' Affection on Multinational Enterprises'''' Value

    Issue 6, (2001)
    Abstract：Function relations between exchange rates and multinational enterprises' value is deduced on the basis of exchange rates/multinational enterprises' value model. The coefficients of function relationship are calculated by means of real data of some enterprises in China. Finally, a multinational enterprise's value's trend is forecast. Analysis shows the significant relation between multinational enterprise's value and exchange rate and that its regressive function has a powerful forecasting ability for the short term (whthin a quarter) enterprises' value change which might facilitate the anticipation of the future value of a multinational enterprise.  
    Keywords：exchange rate,enterprises' values,multinational enterprises  
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    Updated：2024-02-27

  • Some Inspire to China Chambers of Commerce for Import and Export Through the International Comparing of Foreign Chambers

    Issue 6, (2001)
    Abstract：Based on the systematic arranging, summarizing and analyzing of the large quantity of data about the foreign and interior chambers, the foreign chambers's legislation, character, foundation, relationship with government, the seperation of administration and policy decision, function and action and many faceted of fianicial source through arranging, summarizing and analyzing a lot of foreign material and documents were analyzed. Some successful experience which are good for China chambers of commerce for import and export can be obtained. Thereby we need to speed up the construction of chambers themselves to promote the developing of our international trade.  
    Keywords：chamber of commerce,chamber of commerce for import and export,system reform of foreign trade,  
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    Updated：2024-02-27

  • Extension Definition on Q-rates of Convergence and Efficiency

    Issue 6, (2001)
    Abstract：The definition of Q rates of convergence in iterative algorithms is extened and the efficiency measure is developed. The relationship between the new definition of efficiency and the old two definitions of efficiency--Ostrowski efficiency and Brent efficiency was also analysed. Since this measure is suitable to every iterative algorithm, it provide a theoretical justification for the algorithm.  
    Keywords：generalized Q rates of convergence,Ostrowski efficiency,Brent efficiency  
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    Updated：2024-02-27

  • On the Squeeze Flow of Newtonian Fluid Between Two Rigid Spheres With Wall Slip

    Issue 6, (2001)
    Abstract：In a squeeze flow wall slip may happen at a solid fluid interface in the case of some Non Newtonian fluid, or a Newtonian fluid with a thin lubricant film between the fluid and the wall. Based on Reynolds' lubrication theory, an analytical solution for two rigid spheres was derived, including pressure distribution and resulting viscous force. By introducing a so called "slip correction coefficient", this force can be represented by a product of the relevant non slip solution and the coefficient. In general this coefficient is a function of the slip parameter and the dimensionless integration limit, however, further numerical test shows that, for a sufficient large value of the dimensionless upper limit of integration and a given slip parameter, the coefficient converges to a limit value, suggesting a simplification in calculation of the viscous force to save the CPU time significantly in simulation for a wet granule system using the Distinct Element Method.  
    Keywords：squeeze flow,slip,Newtonian fluid,lubrication theory,Distinct Element Method  
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    Updated：2024-02-27

  • Purification of an Extrem-thermostable Xylanase B From Thermotoga maritima

    Issue 6, (2001)
    Abstract：The xyn B gene of Thermotoga maritima MSB8 was cloned and expressed in E.coli , the C terminal His tag was introduced, and purification methods of the recombinant enzyme were studied. The xylanase B was purified to homogeneity by heat treatment, affinity chromatography and ion exchange chromatography. The purified enzyme showed as a single protein band on SDS PAGE with a molecular weight of 42 ku, this is in good agreement with the molecular mass of enzyme deduced from the DNA sequence, 42 333 u.  
    Keywords：Thermotoga maritima,thermostable xylanase B,heat treatment,Ni NTA affinity chromatography,ion exchange chromatography  
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    Updated：2024-02-27

  • Application of Vacuum Freeze Drying on Chinese Herb Processing

    Issue 6, (2001)
    Abstract：Based on the introduction of the principle and the technical points of vacuum freeze drying on Chinese herb processing, the quality control model in the process was built, and the methods to determine the coefficient of the model were analyzed. It is indicated that the method of vacuum freeze drying can effectively prevent the degradation of cure and taste properties and the losing of biochemical active mass during the traditional drying process of Chinese herb. The market prospect of vacuum freeze drying on Chinese herb processing was forecasted while its limitation such as high cost was also discussed.  
    Keywords：vacuum freeze drying,Chinese herb,quality control,degradation  
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    Updated：2024-02-27

  • Rainfall Infiltration Related to Different Conservation Tillage Factors

    Issue 6, (2001)
    Abstract：Two rounds of field rainfall simulation experiments were conducted to assess the impacts of conservation tillage and its related factors, including surface tillage, residue cover and wheel traffic, on runoff and infiltration. The first test showed that conservation tillage can remarkably delay runoff and improve infiltration compared to conventional moldboard plough practice(CK). Among the three factors, residue cover and wheel traffic are more influential for infiltration, while the effect of surface tillage is not clear. Under low soil moisture and 72 mm/h of rainfall rate, conservation tillage could delay runoff 12~16 minutes and the final infiltration rate could be 1 5~1 6 times more than CK; Residue cover could delay runoff 8 minutes and increase the final infiltration rate by 1 1 times while wheel compaction produce runoff 7 minutes earlier and decrease infiltration rate by 47 5 % . The second test is to further investigate the effects of different levels of compaction and residue cover on infiltration. Within cover rate of 0~70 % , when residue cover increases, ponding and saturation will be delayed, the final infiltration rate will be higher and runoff amount will decrease along the conic curve vs cover rate. When soil is wetter, the effect of residue cover will be lower and the effect of compaction will be stronger. Compaction could increase surface soil bulk density hence worsen infiltration capability. Under the experimental situation with high soil moisture and 82 5 mm/h of rainfall rate, wheel compaction could produce runoff 13 minutes earlier and decrease infiltration rate by 86 8 % . Moreover, the heavier the machinery, the deeper the soil is compacted. Small tractor could compact soil within the surface of 10 cm and middle size tractor could affect the depth to 20 cm or more. Both the tractors could remarkably compact the surface 10 cm which is critical to rainfall infiltration.  
    Keywords：conservation tillage,rainfall simulation,runoff,infiltration  
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    Updated：2024-02-27

  • Test Research and Structure Design on the Water-application-furrow Seeder

    Issue 6, (2001)
    Abstract：Water application furrow seeder for arid and semi arid region can carry on the watering operation as sowing and fertilizing with the objective of seedling prevention. In order to study the relationship between the water application position and water application systems with soil environment, 2BFG(4)8 water application furrow seeder is designed. Water application position, watering depth and working parts that influenced watering evenness are discussed. The results of field tests and indoor experiments showed that this machine is fit for seedling prevention and water saving.  
    Keywords：furrow seeder,water application position,structure design  
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    Updated：2024-02-27

  • Analysis of Rian Storage and Infiltration in Sunken-lawn Under the Condition of Designed Storm

    Issue 6, (2001)
    Abstract：Sunken lawn have the advantage of storing and infiltrating the rainwater, cutting down flood flow and peak, filtrating water quality, preventing soil erosion and beautifying the environment, etc. It is one of effective measure of rainwater use in town. The effects of storage and infiltration is calculated and analyzed under the condition of designed storm. Results showed that it is very effective. It is suggested that the sunken lawn is adopted in program and construction of town.  
    Keywords：sunken lawn,design storm,rainwater storage and infiltration rainwater use  
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    Updated：2024-02-27

  • Study on Light and Thermal Environment of NJ-6 Type Multi-span Greenhouse in Winter

    Issue 6, (2001)
    Abstract：The problems in multi span greenhouse industry are that the light and thermal environment are bad and the energy consumed in greenhouse is pretty much in winter. The light and thermal environment of NJ 6 type greenhouse which based on absorbing the advantages of solar greenhouses was studied in Yantai Agricultural Science Academy, Shandong Province, improved that this greenhouse has good light and thermal preservation effect. NJ 6 type multi span greenhouse is suitable to be used in most areas of North China.  
    Keywords：multi span greenhouse,light and thermal Environment,energy saving  
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    Updated：2024-02-27

  • Applications of Wavelet Analysis in the Field of Relay Protection

    Issue 6, (2001)
    Abstract：The theory of wavelet analysis is briefly introduced. The application of wavelet analysis in the fields of transformer, transmission line, distance measuring with transient waves, recloser, signal filtering, and earthing fault detection are also presented. The wide foreground exists in the use of wavelet analysis.  
    Keywords：power systems,relay protection,wavelet analysis  
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    Updated：2024-02-27

  • Application of Direct3D for Developing View Scene System of Driving Training Simulator

    Issue 6, (2001)
    Abstract：The application of Direct3D to developing view scene system of driver training simulator is introduced. Firstly, great function of Direct3D in making 3D animation program is presented. Then the methods of using the good property of Direct3D to present and generate view scene of simulator are discussed. In order to guarantee the quality of animation, multi buffering, flip surface and area display technique are applied. The results showed that the view scene system of driver training simulator developed with Direct3D can satisfactorily simulate the scene out of car.  
    Keywords：Direct3D,simulator,scene,view scene system,animation  
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    Updated：2024-02-27

  • Rapid Prototype Method Based on OMT and the Application of Developing the Decision Support System(DSS)

    Issue 6, (2001)
    Abstract：With the guidance of OMT method, separating the developing method of system interfaces and the system internal function, the rapid prototype method was discussed in detail through a real example of development of Decision Support System(DSS)--the lowest limited price calculation system PRCSYS01.  
    Keywords：Decision Support System(DSS),object oriented,OMT(Object Modeling Technique),prototype system,rapid prototype method  
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    Updated：2024-02-27

  • Study on Arbitrary Complicated Window Clipping Technology Base on AutoCAD

    Issue 6, (2001)
    Abstract：Based on the characteristics of AutoCAD drawing and functions of operating the drawing in AutoCAD, it is proposed that the closed window boundary should be transformed into the region before the calculation of window clipping and the generating method is given. The entities to be clipped are classified into open loop entities and closed loop entities. For the open loop entities, the steps of calculating the points of intersection and sorting these points are completed at one time by intersection function provided by ObjectARX; For the closed loop entities, the window clipping is completed by combining the boolean operator used in region. The window clipping program module programmed by using above technologies possess the characteristics of simpleness and stability.  
    Keywords：window clipping,ObjectARX,spline curve,boolean operation  
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    Updated：2024-02-27

  • Design Virtual Experiment of Vehicle Using ADAMS

    Issue 6, (2001)
    Abstract：The vehicle model using ADAMS/Car created is first introduced, which includes suspension, steering subsystem, tires, chassis, etc. The close loop control mechanism of ADAMS/Car is analyzed. Because the pylon course slalom experiment is one of the important close loop handling stability experiment, the pylon course slalom experiment is designed using the control files. Based on the result of analysis, the curves of parameters are plotted. Using ADAMS software can significantly reduce product development cycles.  
    Keywords：multi body dynamic,ADAMS/Car,handling and stability experiment  
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    Updated：2024-02-27

  • A Constructing Method of Human Body 3D Model for Virtual Design of Human-machine Interface

    Issue 6, (2001)
    Abstract：A convenient an applied constructing method of human body 3D model for virtual design of Human machine Interface based on the New National Standard of Human dimensions of Chinese Adults is described. OpenGL 3D graph programming is used to design and display 3D animating graphs. A useful computer animation program of human body 3D model is realized. It utilizes revolution of joint to form many kinds of movement status, it could be determined directly and rapidly that which of many schemes of Human machine Interface can perform the function best.  
    Keywords：human machine interface virtual design,human body 3D model,human machine matching  
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    Updated：2024-02-27

  • Performance Evaluation of a Multicast Routing Algorithm

    Issue 6, (2001)
    Abstract：A dispersed routing control algorithm was developed on the basis of the shortest path algorithm to solve network transfer quality of multicast routing. The performance of the proposed algorithm was analyzed and evaluated. The results showed that the dispersed routing control algorithm was suitable to the multicasting communication which needs real time and Quality of Service(QoS).  
    Keywords：multicast,shortest path algorithm,dispersed routing control algorithm  
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    Updated：2024-02-27

  • Study on Soybean Protein Heating Denaturation by DSC

    Issue 6, (2001)
      
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    Updated：2024-02-27

  • Preparation and Characteristics of Insoluble Chitosan Used for Decolourization and Clarification of Apple Juice

    Issue 6, (2001)
    Keywords：insoluble chitosan,preparation,apple juice,discolourization,clarification  
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    Updated：2024-02-27

  • Study Situation and Developing Trend on Detecting and Evaluating Techniques of Motor Driver Fatigue

    Issue 6, (2001)
    Abstract：The study situation on detecting and evaluating techniques of motor driver fatigue in the world(mainly in the U.S.A) is reviewed. There are two kinds of research method for subjective investigating and objective evaluating method of motor driver fatigue. PERCLOS is the percentage of eyelid closure over the pupil over time and reflects slow eyelid closures ("droops") rather than blinks. FWHA and NHTSA consider PERCLOS to be among the most promising known real time measures of alertness for in vehicle drowsiness detection systems. Driving in fatigue state is a serious problem that leads to thousands of vehicle being crashed each year. The drowsiness and fatigue may play an important role in traffic crashes. Based on the analysis of existing detecting and evaluating techniques of motor driver fatigue, several key researching and developing tasks on the detecting and evaluating techniques of motor drivers fatigue in the near future are pointed out as follows: (a) To study the mechanism and model of motor drivers fatigue. (b) To research the detecting technique and corresponding evaluating criterion of motor drivers fatigue. (c) To develop the real time detecting and warning device of motor driver fatigue that not give any uncomfortable and inconvenient perception to motor driver. (d) To improve the reliability of the detecting and warning device of motor driver fatigue. (e) To commercialize the real time detecting and warning device of motor driver fatigue. The final outcome is to apply the advanced commercialized real time detecting and warning device of motor driver fatigue to the vehicles to improve the safety of drive vehicle road system.  
    Keywords：driver fatigue,detecting and evaluating technique,developing trend  
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    Updated：2024-02-27
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