期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2008
卷号：8
期号：5
页码：292-296
出版社：International Journal of Computer Science and Network Security
摘要：Incomplete information systems are expanded with the significance of objects in order to combine factors such as decision maker��s preferences and prior domain knowledge, etc. In the expanded incomplete information systems, information granules have their own significance, some basic concepts in rough set theory such as accuracy measure, rough entropies of knowledge and a set are both established and proved to be monotonous. Weightily, the concepts of knowledge dependency and knowledge dependency for decision are not only established but also deeply investigated. Furthermore, the measurement of knowledge dependency is described by mathematical formula strictly, some interesting results about the measurement of knowledge dependency are gained with the changing of knowledge.
关键词：rough set; incomplete information system; knowledge dependency; entropy
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