Properties of the Second Type of Covering-Based Rough Sets

William Zhu
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引用次数: 48

Abstract

To deal with the vagueness and granularity in information systems, researchers proposed several methods such as fuzzy theory and rough set theory. This paper studies a class of covering-based generalized rough sets. In this setting, a covering can generate a lower approximation operation and an upper approximation operation, but some of common properties of classical lower and upper approximation operations are no longer satisfied. We investigate conditions for a covering under which these properties hold for the second type of covering-based lower and upper approximation operations
第二类基于覆盖的粗糙集的性质
针对信息系统的模糊性和粒度性,研究人员提出了模糊理论和粗糙集理论等方法。研究了一类基于覆盖的广义粗糙集。在这种情况下,覆盖可以生成下近似操作和上近似操作,但经典下近似操作和上近似操作的一些共同性质不再满足。我们研究了覆盖的条件,在这些条件下,这些性质对于第二类基于覆盖的上下近似运算是成立的
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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