The Models of Variable Precision Multigranulation Rough Sets

Autor:	Huili Dou, Suping Xu, Xibei Yang, Jiyue Fan
Rok vydání:	2012
Předmět:	Discrete mathematics Binary relation Rough set Algorithm Mathematics Variable precision
Zdroj:	Rough Sets and Knowledge Technology ISBN: 9783642318993 RSKT
Popis:	Multigranulation rough set is a new expansion of the classical rough set since the former use a family of the binary relations instead of a single binary relation for the constructing of approximations. In this paper, the basic idea of the variable precision rough set is introduced into the multigranulation environment and then the concept of the variable precision multigranulation rough set is proposed. Similar to the classical multigranulation rough set, the optimistic and pessimistic variable precision multigranulation rough sets are defined, respectively. Not only the properties of the variable precision multigranulation rough sets are investigated, but also the relationships among the variable precision rough set, multigranulation rough set and the variable precision multigranulation rough set are examined.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::59d91774f6953791176b82d5eef4208f https://doi.org/10.1007/978-3-642-31900-6_57 Zobrazit plný text záznamu