Computer Science ›› 2017, Vol. 44 ›› Issue (6): 245-249.doi: 10.11896/j.issn.1002-137X.2017.06.042

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Variable Multi-cost Based Decision Theoretic Rough Sets

CHEN Yu-jin, LI Xu-wu, JIA Ying-jie and ZHANG Xin   

  • Online:2018-11-13 Published:2018-11-13

Abstract: By analyzing the limitations of the optimistic multi-cost decision-theoretic rough set and pessimistic multi-cost decision-theoretic rough set,the fusion rules of variable precision multi-cost matrix was proposed and its decision-theoretic rough set was established.By introducing nonlinear mapping function called sigmoid,variable domain expands to real number domain.Furthermore,the properties and relations of these kinds of rough sets were discussed and the measure and cost relations of them were analyzed.Finally,The experimental results show the effectiveness of the model.

Key words: Decision-theoretic rough set,Variable precision,Multi-cost

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