计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (1): 33-35.DOI: 10.3778/j.issn.1002-8331.2009.01.009

• 博士论坛 • 上一篇    下一篇

不协调集值决策信息系统的属性约简

宋笑雪1,2,张文修1   

  1. 1.西安交通大学 理学院 信息与系统科学研究所,西安 710049
    2.咸阳师范学院 计算机系,陕西 咸阳 712000
  • 收稿日期:2008-05-13 修回日期:2008-06-18 出版日期:2009-01-01 发布日期:2009-01-01
  • 通讯作者: 宋笑雪

Knowledge reduction in inconsistent set-valued decision information system

SONG Xiao-xue1,2,ZHANG Wen-xiu1   

  1. 1.Institute of Information and System Science,Faculty of Science,Xi’an Jiaotong University,Xi’an 710049,China
    2.Department of Computer,Xianyang Normal College,Xianyang,Shaanxi 712000,China
  • Received:2008-05-13 Revised:2008-06-18 Online:2009-01-01 Published:2009-01-01
  • Contact: SONG Xiao-xue

摘要: 给出了不协调集值决策信息系统的两种属性约简方法:分配约简和部分一致约简。分配约简保持所有对象的可能决策类不变,部分一致约简保持部分对象的一致决策不变。给出了这些约简的判定定理和辨识矩阵,从而得到了属性约简的具体操作方法。

关键词: 集值决策信息系统, 知识约简, 可辨识矩阵

Abstract: This paper presents two types of the reduction in an inconsistent set-valued decision information system (DIS).The judgment theorem and the discernibility matrix of the possible reduct and the partly-accordant reduct are given,from which we provide a material approach to knowledge reduction.A possible consistent set is a subset of the attribute set that preserves all possible decision classes.A partly-accordant consistent set is a subset of the attribute set that preserves accordant decision classes of partly object.

Key words: set-valued decision information system, knowledge reduction, discernibility matrices