%0 Journal Article
%T Simplified Algorithms for Knowledge Reductions in Information Systems<br>信息系统知识约简简便算法
%A SHAO Ming-Wen ZHANG Wen-Xiu WU Wei-Zhi
%A <br>邵明文
%A 张文修
%A 吴伟志
%J 计算机科学
%D 2003
%I 
%X In this paper, by using discernibility attribute matrices, give the sufficient and necessary conditions for justfying an attribute is absolute,relative and superfluous,and then simplified approaches to knowledge reductions in information systems and consistent target information systems are presented,from which the cost for computing the reductions is reduced.
%K Information systems
%K Consistent target information systems
%K Attributes
%K Knowledge reductions<br>知识约简
%K 信息系统
%K 简便算法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=82DE9880D8350097&yid=D43C4A19B2EE3C0A&vid=340AC2BF8E7AB4FD&iid=708DD6B15D2464E8&sid=C5154311167311FE&eid=D3E34374A0D77D7F&journal_id=1002-137X&journal_name=计算机科学&referenced_num=6&reference_num=11