Constructive methods of rough approximation operators and multigranulation rough sets
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摘要
Four kinds of constructive methods of rough approximation operators from existing rough sets are established, and the important conclusion is obtained: some rough sets are essentially direct applications of these constructive methods. Moreover, the new notions of non-dual multigranulation rough sets and hybrid multigranulation rough sets are introduced, and some properties are investigated.
论文关键词:Rough approximation pair,Constructive method,Non-dual multigranulation rough set,Hybrid multigranulation rough set
论文评审过程:Received 12 January 2015, Revised 30 August 2015, Accepted 29 September 2015, Available online 8 October 2015, Version of Record 3 December 2015.
论文官网地址:https://doi.org/10.1016/j.knosys.2015.09.036