Rough set approximations in incomplete multi-scale information systems

Authors:
Shen-Ming Gu;Xiao-Hui Sun;Wei-Zhi Wu
Affiliations:
School of Mathematics, Physics and Information Science, Zhejiang Ocean University, Zhoushan, Zhejiang, China;School of Mathematics, Physics and Information Science, Zhejiang Ocean University, Zhoushan, Zhejiang, China;School of Mathematics, Physics and Information Science, Zhejiang Ocean University, Zhoushan, Zhejiang, China
Venue:
RSKT'12 Proceedings of the 7th international conference on Rough Sets and Knowledge Technology
Year:
2012

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Abstract

With the view point of granular computing, there are different granules at different levels of scale in data sets having hierarchical scale structures. In this paper, the notion of incomplete multi-scale information systems is first introduced. Using tolerance relation, the lower and upper approximations in incomplete multi-scale information systems are then defined and their properties are examined.