MGRS: A multi-granulation rough set

Y Qian, J Liang, Y Yao, C Dang - Information sciences, 2010 - Elsevier
The original rough set model was developed by Pawlak, which is mainly concerned with the
approximation of sets described by a single binary relation on the universe. In the view of …

Multi-granulation rough sets based on tolerance relations

W Xu, Q Wang, X Zhang - Soft Computing, 2013 - Springer
The original rough set model is primarily concerned with the approximations of sets
described by a single equivalence relation on the universe. Some further investigations …

Rough set method based on multi-granulations

YH Qian, JY Liang - 2006 5th IEEE international conference on …, 2006 - ieeexplore.ieee.org
The original rough set model is concerned primarily with the approximation of sets described
by single binary relation on universe. In the view of granular computing, classical rough set …

Rough set models in multigranulation spaces

Y Yao, Y She - Information Sciences, 2016 - Elsevier
There exist several approaches to rough set approximations in a multigranulation space,
namely, a family of equivalence relations. In this paper, we propose a unified framework to …

Incomplete multigranulation rough set

Y Qian, J Liang, C Dang - … and Cybernetics-Part A: Systems and …, 2009 - ieeexplore.ieee.org
The original rough-set model is primarily concerned with the approximations of sets
described by a single equivalence relation on a given universe. With granular computing …

Generalized multigranulation rough sets and optimal granularity selection

W Xu, W Li, X Zhang - Granular Computing, 2017 - Springer
Multigranulation rough set theory is a desirable direction in the field of rough set, in which
upper and lower approximations are approximated by multiple granular structures. However …

Handling missing values in rough set analysis of multi-attribute and multi-criteria decision problems

S Greco, B Matarazzo, R Słowinski - New Directions in Rough Sets, Data …, 1999 - Springer
Rough sets proved to be very useful for analysis of decision problems concerning objects
described in a data table by a set of condition attributes and by a set of decision attributes. In …

On the structure of the multigranulation rough set model

Y She, X He - Knowledge-Based Systems, 2012 - Elsevier
The original rough set model, ie, Pawlak's single-granulation rough set model has been
extended to a multigranulation rough set model, where two kinds of multigranulation …

NMGRS: Neighborhood-based multigranulation rough sets

G Lin, Y Qian, J Li - International Journal of Approximate Reasoning, 2012 - Elsevier
Recently, a multigranulation rough set (MGRS) has become a new direction in rough set
theory, which is based on multiple binary relations on the universe. However, it is worth …

Pessimistic rough set based decisions: a multigranulation fusion strategy

Y Qian, S Li, J Liang, Z Shi, F Wang - Information Sciences, 2014 - Elsevier
Multigranulation rough sets (MGRS) is one of desirable directions in rough set theory, in
which lower/upper approximations are approximated by granular structures induced by …