期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2006
卷号：6
期号：12
页码：148-153
出版社：International Journal of Computer Science and Network Security
摘要：The paper first analyses the expanded rough set models in [1,2], proposes a new variable precision limited tolerance model to deal with incomplete information systems based on variable precision limited tolerance relation, that is a more restrictive condition imposed on the similarity between objects by attribute values. It then introduces new definitions of object dependency, knowledge dependency and dependency degree. Using them as basic concepts, it does reductions. Through an example, it shows that this new reduction approach is rational and efficient.
关键词：incomplete information system, variable precision limited tolerance relation rough set model, knowledge dependency.
