Chengyuan Chu

Chinese Academy of Sciences, Peping, Beijing, China

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Publications (1)0.2 Total impact

  • Source
    Jiye Liang · Yuhua Qian · Chengyuan Chu · Deyu Li · Junhong Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, the concept of a granulation order is proposed in an information system. The positive approximation of a set under a granulation order is defined. Some properties of positive approximation are obtained. For a set of the universe in an information system, its approximation accuracy is monotonously increasing under a granulation order. This means that a proper family of granulations can be chosen for a target concept approximation according to the user requirements. An algorithm based on positive approximation is designed for decision rule mining, and its application is illustrated by an example.
    Full-text · Chapter · Sep 2005

Publication Stats

14 Citations
0.20 Total Impact Points


  • 2005
    • Chinese Academy of Sciences
      • Institute of Computing Technology
      Peping, Beijing, China