Approximation of class unions based on dominance-matrix within dominance-based rough set approach

Authors:
Ming Li;Baowei Zhang;Tong Wang;Li Zhao
Affiliations:
School of Computer and Communication, Lanzhou University of Technology, Lanzhou, P.R. China;School of Computer and Communication, Lanzhou University of Technology, Lanzhou, P.R. China;School of Computer and Communication, Lanzhou University of Technology, Lanzhou, P.R. China;School of Computer and Communication, Lanzhou University of Technology, Lanzhou, P.R. China
Venue:
ACII'05 Proceedings of the First international conference on Affective Computing and Intelligent Interaction
Year:
2005

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Abstract

Dominance-based Rough Set Approach (DRSA) is an extension of classical Rough Set Theory (RST). Approximation of class unions is a very important approach in DRSA. Aiming at the disadvantage of the classical method we presented a new methodology for approximation of class unions based on dominance-matrix. It only needs to calculate the dominance-matrix and does not need to consider the preference relations one by one. Thus it greatly simplifies the process. Besides it is intuitive and efficient. The example illustrates its feasibility and efficiency.