Frame Design and Reality of Numerical Model for Sculptured Part Machining

The importance of the numerical model for sculptured part machining based on virtual environment is introduced. Meanwhile, the general frame of the numerical model is proposed, and the techniques of developing the numerical model are discussed in detail.     

应用于师专无机化学物质结构教学的CAI软件

基于师专无机化学物质结构课堂教学的CAI软件，集交互功能、虚拟现实功能、课堂教学功能于一体，将其应用于课堂教学取得较好的效果。     

Particle swarm optimization algorithm for partner selection in virtual enterprise

Partner selection is a fundamental problem in the formation and success of a virtual enterprise. The partner selection problem with precedence and due date constraint is the basis of the various extensions and is studied in this paper. A nonlinear integer program model for the partner selection problem is established. The problem is shown to be NP-complete by reduction to the knapsack problem, and therefore no polynomial time algorithm exists. To solve it efficiently, a particle swarm optimization （PSO） algorithm is adopted, and several mechanisms that include initialization expansion mechanism, variance mechanism and local searching mechanism have been developed to improve the performance of the proposed PSO algorithm. A set of experiments have been conducted using real examples and numerical simulation, and have shown that the PSO algorithm is an effective and efficient way to solve the partner selection problems with precedence and due date constraints.     

钢筋混凝土桥梁结构分析的有限单元法（Ⅰ）—线弹性分析

本文根据虚拟层合单元的概念，构造了可分析带箱的钢筋混凝土桥梁结构的８－２０结点的三维层合块体单元，大大减少了单元数目，提高了计算效率，而精度却无明显降低。     

虚拟现实技术在教育中的应用

本文在阐述虚拟现实概念的基础上，通过三方面实例说明虚拟现实在教育中的应用。     

虚拟现实交互技术及实例

文中对虚拟现实交互实例ＩＳＡＡＣ进行了全面介绍。     

IPsec在嵌入式VPN系统中的应用

依据网络安全理论,应用IPsec技术,对嵌入式VPN系统的认证过程进行了理论和应用性的讨论,重点探讨了嵌入式系统认证体系及其基于IPsec的实现方法,给出了一种基于端——端连接的嵌入式VPN系统的认证实施方案。     

基于动态稳定的敏捷虚拟企业技术创新战略研究

从虚拟企业技术创新的经济学分析入手,分析了影响虚拟企业技术创新稳定性的因素和导致虚拟企业技术创新不稳定的因素,提出了基于动态稳定的虚拟企业技术创新战略。     

VXI总线电液伺服阀动态特性测试系统误差分析

分析了基于VXI总线组建的电液伺服阀动态特性测试系统的误差来源,指出了VXI总线测试系统的高速、精确中断采集功能,提高了系统的测试精度,并减少了误差.液压测试系统的误差对于线性较好的电液伺服阀动态特性测试误差较小,对于非线性较强的阀动态特性测试误差较大,采用VXI总线系统减少了测试误差.液压系统和VXI测试系统在采用非线性检测理论下可以分析电液伺服阀的非线性,是分析研究电液伺服阀非线性的实验平台.图6,参11.     

基于VRML的虚拟联欢场景构造

讨论了虚拟联欢场景的实现(动画脚本添加、优化等方面)，介绍了缩小网络远距离交互中文件大小以及使画面灵活逼真的方法。