Computer Science

Computer Science ›› 2022, Vol. 49 ›› Issue (6): 172-179.doi: 10.11896/jsjkx.220200067

• Database & Big Data & Data Science • Previous Articles     Next Articles

Optimal Scale Selection in Random Multi-scale Ordered Decision Systems

FANG Lian-hua1, LIN Yu-mei1, WU Wei-zhi1,2   

  1. 1 General Education Center,Quanzhou University of Information Engineering,Quanzhou,Fujian 362000,China
    2 School of Information Engineering,Zhejiang Ocean University,Zhoushan,Zhejiang 316022,China
  • Received:2022-02-14 Revised:2022-03-05 Online:2022-06-15 Published:2022-06-08
  • About author:FANG Lian-hua,born in 1986,master,lecturer.Her main research interests include rough set and general topology.
    WU Wei-zhi,born in 1964,Ph.D,professor.His main research interests include rough set,granular computing,data mining and artificial intelligence.
  • Supported by:
    National Natural Science Foundation of China(61976194,62076221),Education and Scientific Research Project for Young and Middle-aged Teachers in Fujian Province(JAT200799) and Research on Teaching Reform of Vocational Education in Fujian Province(GB2020036).

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Abstract: Aiming at the knowledge acquisition problem of multi-scale ordered information system obtained from random experiments,concepts of random multi-scale ordered information systems and dominance-equivalence-relations-based random multi-scale ordered decision systems are first introduced.Information granules in random multi-scale ordered information systems as well as lower and upper approximations of sets with respect to dominance relations induced by conditional attribute set under different scales are then described.Their relationships are also clarified.Finally,concepts of several types of optimal scales in random multi-scale ordered information systems and dominance-equivalence-relations-based random multi-scale ordered decision systems are defined.It is proved that belief and plausibility functions in the Dempster-Shafer theory of evidence can be used to characterize some optimal scales in random multi-scale ordered information systems and dominance-equivalence-relations-based random multi-scale ordered decision systems,respectively.

Key words: Belief functions, Granular computing, Multi-scale ordered information systems, Optimal scale, Rough sets

CLC Number: 

  • TP182
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