计算机科学与探索 ›› 2012, Vol. 6 ›› Issue (3): 281-286.DOI: 10.3778/j.issn.1673-9418.2012.03.009

• 学术研究 • 上一篇    

横贯拟阵与覆盖粗糙集

王石平, 祝 峰, 闵 帆, 汤建国   

  1. 1. 电子科技大学 数学科学学院, 成都 611731
    2. 漳州师范学院 粒计算重点实验室, 福建 漳州 363000
    3. 电子科技大学 计算机科学与工程学院, 成都 611731
  • 出版日期:2012-03-01 发布日期:2012-03-01

Transversal Matroid and Covering-Based Rough Sets

WANG Shiping, ZHU Feng, MIN Fan, TANG Jianguo   

  1. 1. School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China 2. Lab of Granular Computing, Zhangzhou Normal University, Zhangzhou, Fujian 363000, China 3. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
  • Online:2012-03-01 Published:2012-03-01

摘要: 通过结合拟阵理论, 建立了覆盖粗糙集的横贯拟阵结构; 在此结构下, 建立了覆盖与正规拟阵间的联系, 揭示了覆盖变化与相应的横贯拟阵变化的关系; 进一步给出了由任一拟阵导出覆盖的方法, 且研究了该方法和覆盖产生横贯拟阵的方法之间的联系; 证明了一个论域上的覆盖可由它产生的横贯拟阵导出, 当且仅当此覆盖是划分。

关键词: 粗糙集, 覆盖, 横贯拟阵, 正规拟阵

Abstract: This paper constructs the transversal matroidal structure of covering-based rough sets. It establishes a close relationship between coverings and normal matroids, and indicates the change relationship between coverings and transversal matroids in the matroidal structure. On the other hand, it provides an approach to induce a covering from a matroid, specifically, studies the relationship between two inductions. Finally, it proves that a covering can be induced by the transversal matroid induced by the covering if and only if the covering coincides with a partition.

Key words: rough sets, covering, transversal matroid, normal matroid