CAJ | 학술논문

属性约简是知识发现的重要课题，也是粗糙集理论的核心问题之一。主要通过定义关系矩阵、上（下）分布矩阵、模糊上（下）分布矩阵和决策矩阵，用矩阵算法计算信息系统中变精度粗糙集模型的上（下）分布约简和模糊目标信息系统中的上（下）分布约简以及决策约简。
속성약간시지식발현적중요과제，야시조조집이론적핵심문제지일。주요통과정의관계구진、상（하）분포구진、모호상（하）분포구진화결책구진，용구진산법계산신식계통중변정도조조집모형적상（하）분포약간화모호목표신식계통중적상（하）분포약간이급결책약간。
Attribute reduction is one of the most key issues of knowledge discovery. It is also a core problem in the rough set theory. The main objective of the paper is to propose a series of matrices, such as the relation matrix, the upper(lower) distribution matrix, the fuzzy upper(lower)distribution matrix and the decision matrix. Then, the matrix algorithm of the upper(lower)distribution reduction in variable precision rough sets and the matrix algorithm of the fuzzy upper(lower) distribution reduction, the decision reduction in the fuzzy decision information system are obtained.