Subsystem based generalizations of rough set approximations

Authors:
Yiyu Yao;Yaohua Chen
Affiliations:
Department of Computer Science, University of Regina, Regina, Saskatchewan, Canada;Department of Computer Science, University of Regina, Regina, Saskatchewan, Canada
Venue:
ISMIS'05 Proceedings of the 15th international conference on Foundations of Intelligent Systems
Year:
2005

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Abstract

Subsystem based generalizations of rough set approximations are investigated. Instead of using an equivalence relation, an arbitrary binary relation is used to construct a subsystem. By exploring the relationships between subsystems and different types of binary relations, we examine various classes of generalized approximation operators. The structures of subsystems and the properties of approximation operators are analyzed.