کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
396040 | 666107 | 2007 | 8 صفحه PDF | دانلود رایگان |
One of the key problems of knowledge discovery is knowledge reduction. This paper proposes a new method for knowledge reduction in information systems. First, two families of closed sets CrCr and CRCR are defined, where r and R are equivalence relations defined on the attribute set and its power set, respectively. The properties of CrCr and CRCR are also discussed. The necessary and sufficient condition for Cr=CRCr=CR is then given and employed to construct an approach to attribute reduction in information systems. It is also proved that under the condition Cr=CRCr=CR, the proposed approach to knowledge reduction is equivalent to the well-accepted one in reference [W.X. Zhang, Y. Leung, W.Z. Wu, Information Systems and Knowledge Discovery, Science Publishing Company, Beijing, 2003].
Journal: Information Sciences - Volume 177, Issue 15, 1 August 2007, Pages 3178–3185