摘要
利用论域U上任意粗糙集的近似精度ρR(X)定义了基于近似精度的粗糙隶属函数,实现了对任意粗糙集边界域中元素更为准确的刻划.用模糊集的隶属函数进一步揭示了粗糙集的本质.
The rough membership function based on the approximation precision ρR (X) is defined by the approximation precision of the any rough set on the universe. It can describe the elements in the boundary region of rough sets more precisionly. Meanwhile, the essence of rough sets is presented by the membership function of fuzzy sets.
出处
《西北师范大学学报(自然科学版)》
CAS
2006年第4期23-26,共4页
Journal of Northwest Normal University(Natural Science)
基金
国家自然科学基金重点资助项目(40235053)
甘肃省自然科学基金资助项目(3ZS041-A25-004)
西北师范大学重点学科基金资助项目
关键词
模糊集
粗糙集
分明集
粗糙隶属函数
fuzzy set
rough set
crisp sets
rough membership function