This article deals with the total quality control of the library and evaluation on its automatic system so as to raise the level of the library automation.

引入全面质量管理的概念，对图书馆自动化系统进行综合评价，以提高图书馆自动化建设的水平。

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Introduce constitution and realization of automatic control of automatic chemical-adding unit of SY system, and develop result evaluation of the application.

结合工程实例，阐述了SY系统自动控制加药装置的组成和自动控制的实现，并对该装置的使用状况作出了效果评价。

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This approach is new and will promote the development of safety evaluation for automatic control system.

这种研究方法具有创新性，对自动化系统的安全评估研究将起到推进作用。

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