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中文摘要：
Object—Z是形式规格说明语言Z的面向对象扩充，适合描述大型面向对象软件规格说明，但它不能很好地描述连续性实时变量和时间限制。线性时态逻辑能够描述实时系统，但不能很好地处理连续时间关系，也不能很好地模块化描述形式规格说明。首先用时钟变量扩充线性时态逻辑，接着提出了一个方法——用带时钟变量的时态逻辑（LTLC）来扩充Object—Z。用LTLC扩充的Object—Z是一个模块化规格说明语言，是Object—Z语法和语义的最小扩充，其最大优点在于它能方便地描述和验证复杂的实时软件规格说明。
英文摘要：
Object-Z, an extension to formal specification language Z, is good for describing large scale object-oriented soft-ware specification. While Object-Z has found application in a number of areas, its utility is limited by its inability to specify continuous variables and real-time constraints. Linear temporal logic can describe real-time system, but it can not deal with time variables well and also can not describe formal specification modularly. This paper extended linear temporal logic with clocks（LTLC） and presented an approach to adding linear temporal logic with clocks to Object-Z. Extended Objeet-Z with LTLC, a modular formal specification language, is a minimum extension of the syntax and semantics of Object-Z. The main advantage of this extension lies in that it is convenient to describe and verify the complex real-time software specification.
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