摘要
在近似空间中,分别以集合的上下近似以及元素的隶属度定义了两个集合间的相似度度量,讨论了两种相似度的性质,并对两种相似度进行了比较.
First, we give two methods of measuring the rough similarity degree between two rough sets by using ap proximation sets and the membership of elements respectively; then, we discuss the properties of these two rough sim ilarity degrees in detail; at last, the difference between the two kinds of rough similarity degree is discussed.
出处
《数学理论与应用》
2012年第3期35-42,共8页
Mathematical Theory and Applications
基金
湖南省科技厅基金项目(2010FJ4136)
湖南省教育厅项目基金(10C0403)
关键词
粗糙集、模糊集、近似空间、相似度、上下近似
Rough Set Fuzzy Set Approximation Space Similarity Degree Lower and Upper Approximation
