%0 Journal Article
%T Knowledge Reduction of Set-valued Information Systems Based on Dominance Relation<br>集值信息系统基于优势关系下的知识约简
%A CHEN Zi-chun
%A LIU Peng-huiQIN Ke-yun
%A <br>陈子春
%A 刘鹏惠
%A 秦克云
%J 计算机科学
%D 2009
%I 
%X We proposed two different types of dominance relations in set-valued information systems by the distribution of set-valued when all attributes were considered as criterions, and generalized the dominance relations in classical information systems. The judgment of knowledge reduction and relative reduction of each object were studied for two types of dominance relations in set valued information systems, from which we defined discernibility function based on discernibility matrix, and got approach computing knowledge reduction and relative reduction of each object.
%K Set-valued information systems
%K Dominance relation
%K Discernibility function
%K Knowledge reduction<br>集值信息系统
%K 优势关系
%K 区分函数
%K 知识约简
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=D19E710BBC30F663DF764AB8E11B88E8&yid=DE12191FBD62783C&vid=933658645952ED9F&iid=59906B3B2830C2C5&sid=5BC9492E1D772407&eid=4609832E4B5C797B&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=11