基于粗糙集的可拓评判权值确定  

Determination of Weight Factor with Extenics Evaluation Based on Rough Set Theory

作　　者：车茜[1] 陈剑平[1] 阙金声[2] 

机构地区：[1]吉林大学建设工程学院,长春130026 [2]北京国电华北电力工程有限公司,北京100011

出　　处：《吉林大学学报（地球科学版）》2008年第2期268-272,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40472136)

摘　　要：为了避免传统的权值确定方法所带来的主观性影响,将粗糙集理论引入可拓权重系数的求解过程中,使权系数问题转化为属性重要度评价问题。通过建立决策表并进行知识约简,确定相应的评价指标,利用各评价指标的重要度计算出相应的权值。这种方法可以更好地避免主观因素对权值的影响,使权值更具有客观性。通过实际工程应用,将粗糙集理论确定的权值与关联函数求得的权值进行对比,证明了基于粗糙集的可拓权值是合理可靠的。To avoid the of weight factor, the rough excessive subjectivity influenced by the conventional determination methods set was introduced to the solution of the weight factor in the extenics evaluation. The problem of the weight factor was transformed to the evaluating of the attribute significance. The decision table was established by the rough set theory to make the knowledge reduced and determine the relevant evaluating indexes. According to the significance of evaluating indexes, the weight factor can be calculated. By comparing the weight factors figured out by the rough set theory and by the dependent function method in the practical engineering, it＇s known that the weight factor based on rough set is more reasonable and with higher reliability.

关 键 词：粗糙集 可拓学 属性约简 权重系数 

分 类 号：P642[天文地球—工程地质学]