Based on an expert system of real-time fault diagnosis of chemical processes developed, techniques of the knowledge-base organization and maintenance are presented in this paper.
在开发化工过程实时故障诊断专家系统的基础上，本文讨论了知识库的组织和维护技术，对知识表示和知识库结构进行了详细介绍。
There is a common feature in those processes developed, i. e. the boiling points of products are far below those of reactants, which favor conducting the reaction rectification technique.
但目前已开发的反应精馏技术都是利用目的产品的沸点远低于原料的沸点的共性，这一共性有利于反应精馏技术的实施。
Clean production processes developed by Dow Chemical Company, DuPont Company and BASF Company are introduced briefly. The situation of domestic clean production of PVC is also introduced.
简要介绍了美国的道化学 公司、 杜邦 公司 ，德国的巴斯夫 公司开发的PVC清洁生产工艺技术 ，同时也介绍了我国开展PVC清洁生产的情况。
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