In this paper,based on the fully consideration of the physical characteristics of wind and snow,a three-dimensional wind field is constructed by discretizing the classic Boltzmann equation.

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The system can display in 3D the robots with higher quality graphics on PC by adopting the solid model technology, and modify the model of robots according to the size given by users, so that the parametric modeling is realized under interactive mode. It realizes the graphics simulation of robots in kinematics in both articulatory space and Cartesian space, and it also realizes the animated simulation of trajectory of linear interpolation in point-to-point mode.

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The conclusion is that the path of Nanjie's institutional change is the outcome of the coevolution, say, competition, constraints, enforcement and transformation between the state and market; the coevolution have three dimensions: benefit, legitimacy and ideology; the path and outcome of institutional change in the process of coevolution are shaped by both the dual process of modernization and marketization in China's social transformation and the path dependence and cultural lag in China's incremental reform strategy: on the one hand, as historical conditions, the proceeding and logic of China's modernization constraint the state and market's institutional choices; on the other hand, under the interplay between the path dependence and cultural lag, the interaction between the state and market can produce various complex combinations, therefore various institutional landscape, even "institutional paradox".

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In order to solve the problem of human-computer interaction in virtual assembly systems, driver classes for data glove and 3D tracker are formed, integrated with virtual assembly environment. Methods of assessing and strategies of processing raw data are given.

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In history and reality, the contradiction between needs and limited resource always exists. From the view point of system-science, it can be concluded that:①The interaction among need-contradiction-ability is the perpetual force for enterprise evolution (and the evolution of other living systems). The improvement of "ability"is the process and result of evolution.②The competition and coordination among systems is the direct power for enterprise evolution. Competition produces various system actions. Coordination makes systems complement their functions with each other. The interactions of competition and coordination push enterprise into the flow of evolution and optimization.③The"stochastic fluctuation"of the system, which is accidental finding, is another force for enterprise evolution. It is a deterministic element in the process of the self-organization of enterprise.

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In view of the demand of computerized eye-glasses-wearing system, an approach to match two dimensional (2D) human head images with 3D glasses frame graphics in 3D space has been proposed. First, the operator points out three or six key points, which are used to locate 3D eye-glasses frame, on the human face image displayed on the computer screen interactively.

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This paper analyses the programme model and three responsibilities of federate code from the point of view of program de...

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Data structure used for interactive design of 3D box CAD and pickup methods of three level objects in plane,line in a plane,and point in a plane were introduced. The interactive 3D paper box CAD system was developed.

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It has carried out a physical experiment building and a virtual laboratory of electromagnetic induction based on VRML, using 3D MAX and VRML to make the three dimensional virtual test equipment, and produces the strategy which could optimize the VRML document, unify VRML and script language JavaScript to realize the object alternately operation in the three dimensional scene ; Using the embed element to insert the virtual experimental file to the HTML documents and realizes the network issue of virtual experimental system, which enables the studier to carry on the browsing study through Internet. And finally this thesis gives an introduction of the test appraisal situation of this virtual experiment.

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