关键词: 覆盖粗糙集, 邻域覆盖粗糙集, 集值覆盖粗糙集, 区间值覆盖粗糙集, 复合覆盖粗糙集

Abstract: Because the classical covering rough sets can only apply to single data type in the covering domain, composite covering rough sets are presented. Firstly, based on the study of the neighborhood covering rough sets, the set-valued covering rough sets and the interval-valued covering rough sets, composite covering rough sets are presented by establishing a variety of coverage relations, includes neighborhood covering relation, set-valued covering relation, the interval-valued covering relation, which are under the composite data model. The relevant concepts and properties are presented. Secondly, the model are applied to the domain covering problem of a variety of data types, for example symbol data, interval-valued data, set-valued data, number data etc. Finally, an example is given to illustrate the application of the model in composite information system for further deep understanding of the related concepts in composite covering rough sets.

Key words: covering rough sets, neighborhood covering rough sets, set-valued covering rough sets, interval-valued covering rough sets, composite covering rough sets