【摘要】 在研究以往的几种事务模型的基础上,着眼于CAD系统的并发性和一致性,提出了一种基于CPN的事务代理模型,并详细研究了代理的功能实现;分析了该模型对CAD系统的影响;最后给出了模型的应用实例。CAD系统事务代理模型的提出,为构造高度并发性和一致性的CAD系统打下了基础。更多还原

【Abstract】 Based on the research of several kinds of transaction model for CAD system, an agent-based transaction model is presented, aiming at the concurrence and consistency of CAD system. Functions of agent are discussed in detail. After that the effect of agent-based model on concurrence of the whole CAD system is also given. Finally,some practical issues of its application are introduced. Agent-based transaction model is proved to be a solid base for the implementation of the higher concurrence and consistency in CAD system.更多还原