%0 Journal Article
%T Knowledge Reduction and Rule Extraction in Set-valued Decision Information System<br>集值决策信息系统的知识约简与规则提取
%A SONG Xiao-Xue
%A XIE Zheng-Long
%A ZHANG Wen-Xiu
%A <br>宋笑雪
%A 解争龙
%A 张文修
%J 计算机科学
%D 2007
%I 
%X In this paper we describe the incomplete information system by the set-valued information system. The two relations are defined in set-valued decision information system: the tolerance relation and the dominance relation. The rough approximation on these relations is defined, and the different properties of a set-valued information system based on these two relations are studied. Then we give the judgment theorems and the discernibility matrices of the generalized decision reduction in set-valued decision information system based on these relations, from which we provide a material approach to knowledge reduction. Finally, the optimal generalized decision rules are discussed based on these two relations.
%K Set-valued information system
%K Knowledge reduction
%K Discernibility matrices
%K Decision rule<br>集值信息系统
%K 知识约简
%K 辨识矩阵
%K 决策规则
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=02E84595AB692951A09442CB878A4368&yid=A732AF04DDA03BB3&vid=339D79302DF62549&iid=E158A972A605785F&sid=B1F98368A47B8888&eid=798FBE8DE1A255B1&journal_id=1002-137X&journal_name=计算机科学&referenced_num=3&reference_num=7