DocumentCode
2905380
Title
Global roughness of approximation and boundary rough sets
Author
Yang, Yingjie ; John, Robert
Author_Institution
Centre for Comput. Intell., De Montfort Univ., Leicester
fYear
2008
fDate
1-6 June 2008
Firstpage
1106
Lastpage
1111
Abstract
This paper defines a new parameter for describing the uncertainty of rough sets. Different from the roughness of a rough set, a global roughness measures the uncertainty of rough sets with respect to the entire information system. This is essential especially for a special rough set - boundary rough sets.We give the definition of global roughness of approximation and boundary rough sets, and analyse their properties. Some examples are also provided to show the complementary features of global roughness and roughness of rough sets.
Keywords
approximation theory; rough set theory; approximation rough sets; boundary rough sets; global roughness; rough sets uncertainty; Decision making; Fuzzy sets; Information systems; Measurement uncertainty; Rough sets; Set theory;
fLanguage
English
Publisher
ieee
Conference_Titel
Fuzzy Systems, 2008. FUZZ-IEEE 2008. (IEEE World Congress on Computational Intelligence). IEEE International Conference on
Conference_Location
Hong Kong
ISSN
1098-7584
Print_ISBN
978-1-4244-1818-3
Electronic_ISBN
1098-7584
Type
conf
DOI
10.1109/FUZZY.2008.4630508
Filename
4630508
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