覆盖粗糙集模型转化的方法研究  

The Research on Covering Rough Set Model Transformation

作　　者：李灿泽[1] 吴根秀[1] 晏伟峰[1] 周丽[1] 

机构地区：[1]江西师范大学数学与信息科学学院,江西南昌330022

出　　处：《江西师范大学学报（自然科学版）》2011年第4期391-395,426,共6页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(60963014);江西省自然科学基金(2007GZS0186)资助项目

摘　　要：通过研究邻域覆盖、覆盖导出的划分之间的内在关系,给出了一种新的转化方法.新方法证明了由一个覆盖可唯一导出一个划分、由覆盖与其覆盖约简导出的划分一致等结论,而且得出了由覆盖导出的等价关系的上、下近似算子更加细分等优良性质;提高了集合的近似程度,能更好地用于属性约简、核的求取和规则的生成等方面研究.A new transformation was proposed by studying the inner relations between neighborhood covering and partition. R is proved that a covering could only derived a partition, a covering and its reduction derived the same partition, these deficiencies were solved. Covering approximation operators of the derived equivalence relations were less coarser, the approximation degree of a set could be improved, better for the attribute reduction, core request, rules formation and other researches.

关 键 词：覆盖粗糙集 Pawlak粗糙集 覆盖度 邻域覆盖 覆盖约简 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]