CASIA OpenIR  > 09年以前成果
 Reduct and attribute order Han, SQ; Wang, J Source Publication JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 2004-07-01 Volume 19Issue:4Pages:429-449 Subtype Article Abstract Based on the principle of discernibility matrix, a kind of reduction algorithm with attribute order has been developed and its solution has been proved to be complete for reduct and unique for a given attribute order. Being called the reduct problem, this algorithm can be regarded as a mapping R = Reduct(S) from the attribute order space Theta to the reduct space R for an information system , where U is the universe and C and D are two sets of condition and decision attributes respectively. This paper focuses on the reverse problem of reduct problem S = Order(R), i.e., for a given reduct R of an information system, we determine the solution of S = Order(R) in the space Theta. First, we need to prove that there is at least one attribute order S such that S = Order(R). Then, some decision rules are proposed, which can be used directly to decide whether the pair of attribute orders has the same reduct. The main method is based on the fact that an attribute order can be transformed into another one by moving the attribute for limited times. Thus, the decision of the pair of attribute orders can be altered to the decision of the sequence of neighboring pairs of attribute orders. Therefore, the basic theorem of neighboring pair of attribute orders is first proved, then, the decision theorem of attribute order is proved accordingly by the second attribute. Keyword Reduct Attribute Order Rough Set WOS Headings Science & Technology ; Technology Indexed By SCI Language 英语 WOS Research Area Computer Science WOS Subject Computer Science, Hardware & Architecture ; Computer Science, Software Engineering WOS ID WOS:000222789900001 Citation statistics Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS] Document Type 期刊论文 Identifier http://ir.ia.ac.cn/handle/173211/9986 Collection 09年以前成果 Affiliation Chinese Acad Sci, Inst Automat, Lab Complex Syst & Intelligence Sci, Beijing 100080, Peoples R China Recommended CitationGB/T 7714 Han, SQ,Wang, J. Reduct and attribute order[J]. JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY,2004,19(4):429-449. APA Han, SQ,&Wang, J.(2004).Reduct and attribute order.JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY,19(4),429-449. MLA Han, SQ,et al."Reduct and attribute order".JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 19.4(2004):429-449.
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