The research on exhibition of mechanical products in virtual scene;

Design of 3D virtual scene using VRML;

The construction of network virtual scene;

Research on primitive geometric elements intersection test in virtual environment;

Design and Development of Courseware on Experimental Education Based on Virtual Environment;

Hardware Accelerated Rendering of Virtual Environment;

As to collision detection in virtual scenes,a collision detection algorithm based on bounding box and the new features of virtual browsing is given.

Virtual experimental teaching software simulates physical experiment by abstracting kinds of instrument,building virtual scenes and realizing EDA.

By the analysis to the complex scene,a double-layer visibility culling algorithm is proposed,and the algorithm combines view frustum culling,detail culling and occlusion culling methods.

Some key technologies are discussed,such as the modeling and optimizing of cosmically and complex scene,scene database optimizing,the showing and optimizing of CAD models,the optimizing of data structures.

The complex scene of the block scheduling strategy and its improvement programme are discussed,and it is applyed to "the virtual training system of station" ,soluted the "jump flash" phenomenon in the block scheduling strategy.