DocumentCode
2621227
Title
Information granules in general and complete coverings
Author
Wu, Chen ; Yang, Xibei
Author_Institution
Dept. of Comput. Sci. & Technol., Nanjing Univ. of Sci. & Technol., China
Volume
2
fYear
2005
fDate
25-27 July 2005
Firstpage
675
Abstract
Two different operations of information granules are defined in the general coverings on a universe in this paper and different levels of granularity of coverings are studied based on the operations. Besides, general covering and complete covering according to a compatible relation are established in rough set theory in incomplete information systems, respectively. Complete covering is compared with general covering and then a necessary and sufficient theorem is proved to ensure a covering to be a complete covering. Some other significant results are also gained.
Keywords
information systems; rough set theory; complete covering; general covering; incomplete information system; information granule; rough set theory; Computer science; Information systems; Problem-solving; Set theory; Virtual colonoscopy; Virtual manufacturing;
fLanguage
English
Publisher
ieee
Conference_Titel
Granular Computing, 2005 IEEE International Conference on
Print_ISBN
0-7803-9017-2
Type
conf
DOI
10.1109/GRC.2005.1547376
Filename
1547376
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