JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2021, Vol. 56 ›› Issue (11): 31-37.doi: 10.6040/j.issn.1671-9352.4.2021.033

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Rules acquisition based on OE-approximate concept lattice in incomplete formal decision contexts

CHANG Li-na1,3*, WEI Ling2,3   

  1. 1. Department of Mathematics, Changzhi University, Changzhi 046011, Shanxi, China;
    2. School of Mathematics, Northwest University, Xian 710127, Shaanxi, China;
    3. Institute of Concepts, Cognition and Intelligence, Northwest University, Xian 710127, Shaanxi, China
  • Online:2021-11-20 Published:2021-11-15

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Abstract: First, OE-consistency of incomplete formal decision contexts is defined through the finer relation between the object-induced three-way condition approximate concept lattice and the object-induced three-way decision approximate concept lattice. Then, object induced three-way rules acquisition method is proposed based on the OE-consistent incomplete formal decision contexts, rules are acquired and interpreted from positive and negative perspectives respectively. Moreover, the judgement theorem of redundant rules and the extraction algorithm of irredundant rule sets are given. Finally, three-way rules acquisition method with confidence is proposed by using the inclusion degree theory, which provide more details and make the acquired rules more complete.

Key words: concept lattice, incomplete formal decision context, rules acquisition, consistency, object-induced three-way approximate concept

CLC Number: 

  • O29
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