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Grade serves as a fundamental quantitative index, and the graded rough set model is a basic model. Thus, this paper aims to investigate an original logical difference in the graded rough set model. According to the specific logical requirement on the grade index, the logical difference is put forward based on the graded lower and upper approximation operators; the new concept has the practical logical...
Knowledge and classifications are related together by the theory of rough sets which claim is that knowledge is deep-seated in the classification abilities of human beings. In this paper, relative partition granularity, a quantitative representation for the relative classification ability of conditional attributes relative to decision attribute was defined. The equivalence between some basic concepts...
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