%0 Journal Article
%T Algorithm of upper and lower approximations based on matrix<br>基于矩阵的粗糙集上、下近似求解算法*
%A LIU Cai-hui
%A MIAO Duo-qian
%A <br>刘财辉
%A 苗夺谦
%J 计算机应用研究
%D 2011
%I 
%X This paper mainly discuss the problem about the calculation of upper and lower approximations in Rough Set Theory. Because a relation can be represented by a matrix and matrix operations are simple and intuitive, a new method about the calculation of upper and lower approximations was proposed based on relation martix and martix operations.The theoretical proof shows that the method is feasible and effective.
%K Rough Set Theory
%K The upper and lower approximations
%K Martix operations
%K Variable Precision<br>粗糙集理论
%K 上下近似
%K 矩阵运算
%K 可变精度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=3BC98A73740A2A21221FCD5795522CE2&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=99C22CF1E519BF36&eid=2AAEC1E50A125188&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=9