Stimulated by changing of employees' perusing and needing human rights, the notion of Quality of work life(QWL) was created on the basis of social-technical system theory(STS).
工作生活质量是在社会技术系统理论的基础上，在员工需求发生极大变化的时候出现的新概念，并引起国内外学者的极大关注。
Modern computer technique, power supply technique and fuzzy control theory provide new technical method for research of intelligent charging system.
现代计算机技术、电源技术与模糊控制理论等，为智能充电系统的研究提供了新的技术手段。
This paper discusses PLC control system formation, casting technical process and control theory of PLC in centrifugal casting iron pipe machine.
本文介绍了PLC控制系统组成、浇铸工艺流程、及PLC在离心球墨铸管机中的控制原理。
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