CAJ | 학술논문

在集值信息系统中,把所有属性看成是一种准则,然后利用属性集值的取值分布定义了两种不同的优势关系,它们都是经典信息系统上优势关系的推广.针对这两种优势关系,给出了集值信息系统的知识约简与对象的相对约简的判定,定义了基于区分矩阵的区分函数,并利用布尔推理方法得到了这两种优势关系下的知识约简与对象的相对约简的具体操作方法.
재집치신식계통중,파소유속성간성시일충준칙,연후이용속성집치적취치분포정의료량충불동적우세관계,타문도시경전신식계통상우세관계적추엄.침대저량충우세관계,급출료집치신식계통적지식약간여대상적상대약간적판정,정의료기우구분구진적구분함수,병이용포이추리방법득도료저량충우세관계하적지식약간여대상적상대약간적구체조작방법.
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 dis-cernibility matrix,and got approach computing knowledge reduction and relative reduction of each object