摘要
分析乐观多粒度粗糙集和悲观多粒度粗糙集的不足之后,提出一种可变粒度粗糙集模型,定义了可变粒度粗糙集的下、上近似集,研究了可变粒度粗糙集与这两种多粒度粗糙集的性质,证明了可变粒度粗糙集是多粒度粗糙集的泛化,最后给出几种可变粒度粗糙集的度量因子,研究了变粒度粗糙集与多粒度粗糙集度量之间的关系。
By analyzing the weakness of optimistic Muitl-granulation rough set and pessimistic Muitl-granulation rough set,the Variable granulation rough set was proposed,the lower and the upper approximation were defined.Furthermore,the properties of these three kinds of rough sets were discussed,and that the Variable granulation Rough Set is the generalization of Muitl-granulation rough set was proved.At last,some measures of those rough sets were defined,the relation of their measures was discussed.
出处
《计算机科学》
CSCD
北大核心
2011年第10期220-222,247,共4页
Computer Science
基金
国家自然科学基金重点项目(90820306)
中国博士后科学基金项目(20100481149)资助
关键词
可变粒度粗糙集
多粒度粗糙集
度量
Variable granulation rough set
Muitl-granulation rough set
Measure
