Computer Science ›› 2016, Vol. 43 ›› Issue (1): 73-76.doi: 10.11896/j.issn.1002-137X.2016.01.017

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Updating Approximations for a Type of Covering-based Rough Sets

LI Chang-qing and ZHANG Yan-lan   

  • Online:2018-12-01 Published:2018-12-01

Abstract: Rough set theory is a useful tool for data mining.The covering-based rough set theory is one of the most important parts of the rough set theory.An updating algorithm was presented for a pair of covering approximation operators with the increase of objects.Two living examples were employed to evaluate the effectiveness of the proposed method.

Key words: Covering-based rough set,Covering upper (lower) approximation operator,Temporal dynamics

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