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J4 ›› 2010, Vol. 45 ›› Issue (1): 89-93.

• 论文 • 上一篇    下一篇

覆盖决策信息系统的约简

许晴媛 李进金 张燕兰   

  1. 许晴媛  张燕兰:漳州师范学院计算机系, 福建 漳州 363000; 李进金:漳州师范学院数学与信息科学系,福建 漳州 363000
  • 收稿日期:2009-01-21 出版日期:2010-01-16 发布日期:2010-03-25
  • 作者简介:许晴媛(1977-),女,讲师,硕士,研究方向为粗糙集理论及其应用. Email: xqyyuan871@163.com
  • 基金资助:

    国家自然科学基金资助项目(10671173,10971186);福建省科技计划项目(2008F5066);福建省教育厅科技项目(JA09165);漳州师范学院科学研究基金资助项目(SK08005)

Reductions about covering decision information system

  1.  XU Qing-Yuan,  ZHANG Yan-Lan:Department of Computer Science and Engineering, Zhangzhou Normal University,Zhangzhou 363000, Fujian, China;  LI Jin-Jin:Department of Mathematics, Zhangzhou Normal University, Zhangzhou 363000, Fujian, China
  • Received:2009-01-21 Online:2010-01-16 Published:2010-03-25

摘要:

利用集合之间的包含度概念,讨论了覆盖决策信息系统的覆盖决策约简、覆盖分布约简、最大覆盖分布约简之间的关系,讨论了不协调覆盖决策信息系统中覆盖上、下近似约简的刻画及它们与覆盖分布约简、最大覆盖分布约简之间的关系。这些结果推广和深化了决策信息系统约简理论。

关键词: 包含度; 覆盖决策信息系统; 约简

Abstract:

By using inclusion degree between sets, the relationships among covering decision reduction, covering distribution reduction and the largest coveringdistribution reduction about covering decision information system are discussed. Also the characterizations of covering upper and lower approximation reductionabout inconsistent covering decision information system and their relationshipsto covering distribution reduction and the largest covering distribution reduction are studied. The results generalize and deepen the reduction theories of decision information system.

Key words: inclusion degree; covering decision information system; reduction

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