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《工程(英文)》 >> 2019年 第5卷 第6期 doi: 10.1016/j.eng.2019.09.004

聚乙烯生产过程操作优化知识库设计与实现

Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

收稿日期: 2018-12-17 修回日期: 2019-02-22 录用日期: 2019-04-09 发布日期: 2019-10-01

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摘要

构建聚乙烯生产过程领域知识库,形成可复用的生产知识,有助于提升化工行业的智能制造水平。本文结合聚乙烯生产工艺特点,根据实际生产操作需求,设计了知识库的总体结构。引入本体作为聚乙烯生产过程领域知识表示和共享的载体,使用七步法对聚乙烯生产过程进行本体建模,构建了包含知识本体和推理分析的本体库;建立操作条件和分子量分布(MWD)之间的BP神经网络模型,进行MWD的预测;采用差分进化算法对MWD进行优化,实现对操作参数的优化。以MYSQL数据库作为后台支撑数据库,结合Java语言对知识库系统进行设计和开发,实现了基于Browser/Server框架的聚乙烯生产过程操作优化知识库系统。在实际工业应用中,初步验证了该知识库能够满足聚乙烯生产过程操作优化和管理的功能需求,并具有推广到其他化工生产应用场景的价值。

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