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Variable precision multigranulation decision-theoretic fuzzy rough sets
DOI:10.1016/j.knosys.2015.10.007.png)
Abstract
En 中文
This paper studies variable precision multigranulation fuzzy decision-theoretic rough sets in an information system. We firstly review definitions and properties of multigranulation fuzzy rough sets. A novel membership degree based on single granulation rough sets is proposed. Then two operators based on this membership degree are defined. By employing these operators, two types of variable precision multigranulation fuzzy rough sets in an information system are proposed. Finally, inspired by three-way decisions, we propose Type-1 variable precision multigranulation decision-theoretic fuzzy rough sets. (C) 2015 Elsevier B.V. All rights reserved.
Keywords:
Multigranulation fuzzy approximation space
Variable precision rough sets
Lower and upper approximations
Three-way decisions
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