A Granular Reduction Algorithm Based on Covering Rough Sets

Tian Yang, Zhaowen Li, Xiaoqing Yang
2012 Journal of Applied Mathematics  
The granular reduction is to delete dispensable elements from a covering. It is an efficient method to reduce granular structures and get rid of the redundant information from information systems. In this paper, we develop an algorithm based on discernability matrixes to compute all the granular reducts of covering rough sets. Moreover, a discernibility matrix is simplified to the minimal format. In addition, a heuristic algorithm is proposed as well such that a granular reduct is generated rapidly.
more » ... ct is generated rapidly.
doi:10.1155/2012/970576 fatcat:thq5ynf5irgydplyuu43yrz2ya