文献类型：期刊文献

中文题名：基于多输出支持向量机的聚乙烯相对分子质量分布建模与优化(英文)

英文题名：Modeling and optimization for molecular weight distribution of polyethylene based on multi-output support vector machine

作者：叶贞成[1];李赟[1];罗娜[1]

机构：[1]华东理工大学化工过程先进控制和优化技术教育部重点实验室,上海200237

年份：2014

卷号：54

期号：6

起止页码：690

中文期刊名：大连理工大学学报

外文期刊名：Journal of Dalian University of Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：National Natural Science Foundation of China(Grant No.U1162202,21206037);"863"National High Technology Research and Development Program of China(Grant No.2013AA040701);the Natural Science Foundation of Shanghai(Grant No.13ZR1411500);Fundamental Research Funds for the Central Universities~~

语种：中文

中文关键词：聚乙烯;相对分子质量分布;建模;优化;多输出支持向量机

外文关键词：polyethylene molecular weight distribution modeling optimization multi-output support vector machine

摘要：相对分子质量分布(MWD)是聚合物产品重要的质量指标,目前实时检测相对分子质量分布仍缺乏有效的方法.在聚合物研究中,高精度的相对分子质量分布实时检测方法是当前的研究热点.不同于其他文献中描述的方法,通过结合聚合反应机理和过程信息建立相对分子质量分布的混合模型来解决预测精度和实时性问题.首先利用催化剂各活性中心的分布函数加权叠加拟合相对分子质量分布,分布函数参数和工艺条件之间的关系可通过多输出支持向量机回归(MSVR)算法来描述;其次应用无约束非线性优化方法优化上述方法建立的混合模型的工艺条件;最后将建立的混合模型应用于乙烯聚合过程,验证了上述方法的可行性.
The molecular weight distribution （MWD）is an important quality index for the polymer materials,but detecting the MWD in real-time is still difficult up to now.The real-time detection method for the MWD with good accuracy is hotspot in the polymer production.Different from the methods other literatures have described,the reaction mechanism and the industrial information are merged to build a hybrid model for the MWD to solve the prediction accuracy and real-time problems.The weighted superposition of the distribution function on each active center of catalyst is used to fit the MWD. The multi-output support vector machine regression （MSVR ） algorithm is applied to the description of the relationship between process conditions and parameters of the distribution function.Then,the unconstrained nonlinear optimization method is used to optimize the process conditions based on the hybrid model.Finally,the application of the above-mentioned approach in the ethylene polymerization process verifies its feasibility.