For example, for information technology systems, a change control system can include the specifications scripts, source code, data definition language, etc.

例如，对于信息技术系统而言，变更控制系统可以包括每一软件组件的技术规定说明书(脚本、源代码、数据定义语言等)。

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For example, for information technology systems, a change control system can include the specificationsscripts, source code, data definition language, etc. for each software component.

例如，对于信息技术系统而言，变更控制系统可以包括每一软件组件的技术规定说明书脚本、源代码、数据定义语言等。

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The definition of parameter estimability is proposed for parameter estimation problem with finite measurement information based on the definition of system estimability.

基于系统可估计性定义，本文根据有限测量信息的参数估计问题特点，提出了系统的参数可估计性定义；

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