This paper presents a formal approach to specify security model based on the theory of finite state machine(FSM) and the concept of communicating sequential process (CSP).

形式概念分析是从形式背景这一基本的数据形式开始的，因此形式背景的规模是影响概念格构造和应用的一个重要因素。

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To define the semantics of Communicating Sequential Processes, the notions of trace, assertion trace set, kernel of assertion trace set and process trace aet are introduced in this paper.

通信的顺序进程语言是对分布式系统进行程序设计的一种语言。本文介绍了迹、断言迹集合、断言迹集合的核以及进程迹集合等概念。

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