Rough approximation of fuzzy concepts in weak approximation spaces

摘要：

The purpose of this paper is to present a new approach determining the rough approximations of fuzzy concepts in fuzzy decision systems. Based on the hierarchical characteristic of fuzzy sets, aλ- weak fuzzy approximation space and a CNλ-fuzzy rough set, determined by an inclusion function and a near function, are introduced. Some properties of the near function and CNλ-fuzzy rough sets are investigated. Therefore, the lower and upper approximations of a fuzzy decision concept can be derived from the description of inclusion nearness with respect to the fuzzy decision concept.

作者: Ping Wei Hong-Ru Li

作者单位: Department of Mathematics and Information Sciences, Yantai University Yantai, Shandong 264005, P. R. China

会议类型: 国际会议

会议名称: 2007年第三届语义和知识网格国际会议(Third International Conference on Semantics,Knowledge,and Grid)(SKG 2007)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-10-29（万方平台首次上网日期，不代表论文的发表时间）