南京大学学报(自然科学版) ›› 2022, Vol. 58 ›› Issue (1): 71–81.doi: 10.13232/j.cnki.jnju.2022.01.008

• • 上一篇    下一篇

用证据理论刻画协调的具有多尺度决策的信息系统的最优尺度选择

于子淳1, 吴伟志1,2()   

  1. 1.浙江海洋大学信息工程学院, 舟山, 316022
    2.浙江省海洋大数据挖掘与应用重点实验室(浙江海洋大学), 舟山, 316022
  • 收稿日期:2021-07-12 出版日期:2022-01-30 发布日期:2022-02-22
  • 通讯作者: 吴伟志 E-mail:wuwz@zjou.edu.cn
  • 作者简介:E⁃mail:wuwz@zjou.edu.cn
  • 基金资助:
    国家自然科学基金(61976194)

Using evidence theory to characterize optimal scale selections in consistent information systems with multi⁃scale decisions

Zichun Yu1, Weizhi Wu1,2()   

  1. 1.School of Information Engineering,Zhejiang Ocean University,Zhoushan,316022,China
    2.Key Laboratory of Oceanographic Big Data Mining and Application of Zhejiang Province,Zhejiang Ocean University,Zhoushan,316022,China
  • Received:2021-07-12 Online:2022-01-30 Published:2022-02-22
  • Contact: Weizhi Wu E-mail:wuwz@zjou.edu.cn

摘要:

作为人工智能领域的一个重要方向,粒计算在数据挖掘和知识发现方面的研究呈现较大优势.针对具有多尺度决策的信息系统的知识获取问题,提出用证据理论研究具有多尺度决策的信息系统的最优尺度选择问题.首先介绍具有多尺度决策的信息系统及其尺度选择的概念,阐明尺度选择的全体构成一个格结构;其次,给出具有多尺度决策的信息系统在不同尺度选择下信息粒的表示及其相互关系;最后,定义协调的具有多尺度决策的信息系统的最优尺度选择概念,并用证据理论中的信任函数和似然函数刻画最优尺度选择的特征.

关键词: 粒计算, 具有多尺度决策的信息系统, 粗糙集, 证据理论

Abstract:

As an important direction in research fields of artificial intelligence,granular computing has great advantages in data mining and knowledge discovery. To solve the problem of knowledge acquisition in information systems with multi?scale decisions,the optimal scale selection problem of information systems with multi?scale decisions is discussed from the perspective of Dempster?Shafer theory of evidence. The concepts of information systems with multi?scale decisions and their scale selections are first introduced. It is shown that the set of all scale selections constitutes a lattice structure. Information granules under different scale selections in information systems with multi?scale decisions are then described and their relationships are presented. Finally,the notion of optimal scale selections in consistent information systems with multi?scale decisions is defined. It is proved that belief and plausibility functions in the Dempster?Shafer theory of evidence can be used to characterize optimal scale selections in consistent information systems with multi?scale decisions.

Key words: granular computing, information systems with multi?scale decisions, rough sets, theory of evidence

中图分类号: 

  • TP18

表1

一个具有多尺度决策的信息系统"

Ua11a12a21a22a31a32d1d2
x19E9E8Gn1
x29E9E7Gn1
x37G8G7Gc1
x48G6M8Gu1
x58G6M5Bu1
x66M6M2Uo0
x76M5B5Bc1
x86M2U4Bo0
x99E6M5Bu1
x109E6M4Bc1
x118G6M8Gu1
x126M5B5Bc1

图1

尺度选择的格结构"

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