摘要
在S-粗集理论的基础上,给出单向IS-粗集(one direction improper singular rough sets)的概念及其数学结构,并讨论了单向IS-粗集上、下近似算子的性质及IS-粗集与S-粗集和Z.Pawlak粗集的关系.
Based on the theory of S - rough sets, this paper puts forward concepts of one direction improper S - rough sets and its general mathematics structures. Discussed above, under approximate operator nature of one direction improper singular rough sets, and the relationship of improper singular rough sets, singular rough sets and rough sets.
出处
《商丘师范学院学报》
CAS
2009年第6期33-36,共4页
Journal of Shangqiu Normal University
基金
河南省自然科学基金资助项目(0511013700)
河南省教育厅自然科学基金资助项目(200510483002)
关键词
S-粗集
单向IS-粗集
α-迁移
近似算子
singular rough sets
one direction improper singular rough sets
α-transfer
approximate operator
