摘要：Pair Programming (PP) that has gained extensive focus within pedagogical and industrial environments is a programming practice in which two programmers use the same computer to work together on analysis, design, and programming of the same segment of code. Distributed Pair Programming (DPP) system is a programming system to aid two programmers, the driver and the navigator, to finish a common task such as analysis, design and programming on the same software from different locations. This paper first reviews the existing DPP tools and discusses the interaction and coordination mechanism in DPP process. By means of activity theory and language-action theory, some basic requirements of the DPP system are presented. Then, a design framework of such system and functions of each sub-system are deeply analyzed. Finally, a system prototype is implemented by plug-in style in Microsoft Visual Studio environment.

摘要：通过研究多种商用CAD系统所采用的参数化特征建模方法和宏文件,定义宏命令组和宏语义命令,给出基于宏语义的异构CAD协作模型的体系结构;阐述了异构CAD同步协同设计的关键技术,提出了以宏语义命令为中心的宏语义映射模型以及宏语义与宏命令组的实时转换方法;介绍一种新的基于FMVIC算法的多版本复制技术作为并发控制策略以保证非调和冲突操作的意愿.实例表明,通过宏语义命令在异构CAD系统间实时交换操作语义的方法可以较好的实现同步协同设计,减少数据转换的耗时量并降低了对网络带宽的要求,提升了实时同步的效果.

摘要：基于特征的操作转换是同步异构CAD协同系统中的核心问题.分析了异构CAD系统协同中基于特征的建模命令转换,提出了特征建模命令映射集合的构建方法.给出了3种CAD系统间拉伸特征操作转换的实例,分析了构建方法,为实现和优化异构CAD系统协同平台打下良好的基础.