| 面向不完备信息系统的粗糙集方法研究 |
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| 引用本文： | 孙成敏,刘大有,孙舒杨. 面向不完备信息系统的粗糙集方法研究[J]. 小型微型计算机系统, 2007, 28(10): 1869-1873 |
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| 作者姓名： | 孙成敏 刘大有 孙舒杨 |
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| 作者单位： | 1. 吉林大学,计算机科学与技术学院,吉林,长春,130012
2. 吉林大学,符号计算与知识工程教育部重点实验室,吉林,长春,130012 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;国家高技术研究发展计划(863计划);吉林省科技发展计划;吉林省科技发展计划 |
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| 摘 要： | 给出了关于传统粗糙集的基本概念以及不完备信息系统的定义,归纳了信息系统中的空值情形.基于粗糙集的不可识别关系,介绍了几种已有的扩展关系:相容关系、非对称相似关系、量化相容关系和限制相容关系.结合量化和限制相容关系特点,文中提出了限制量化相容关系,并证明在特定条件下,限制量化相容关系是限制相容关系的改进.限制量化相容关系通过量化计算对相容关系作了进一步限制,使之更加合理实用.
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| 关 键 词： | 粗糙集 不完备信息系统 空值 相容关系 限制量化相容关系 |
| 文章编号： | 1000-1220（2007）10-1869-05 |
| 修稿时间： | 2006-07-10 |
Rough Set Method Studies in Incomplete Information System |
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| SUN Cheng-min,LIU Da-you,SUN Shu-yang. Rough Set Method Studies in Incomplete Information System[J]. Mini-micro Systems, 2007, 28(10): 1869-1873 |
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| Authors: | SUN Cheng-min LIU Da-you SUN Shu-yang |
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| Affiliation: | College of Computer Science and Technology, Jilin University, Changchun 130012, China;Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, Jilin University, Changchun 130012, China |
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| Abstract: | The basic notions on classical rough set theory and definitions of incomplete information system are given and cases of blank values in information system are summed up.Based on indiscernibility relation in rough set,several known relations extended are introduced,such as tolerance relation,non-symmetry similar relation,valued tolerance relation and limited tolerance relation.Combining the characteristic of valued tolerance relation with of limited tolerance relation,this paper presents limited-valued tolerance relation.The paper proves that limited-valued tolerance relation is improvement of limited tolerance relation given special condition.The relation further limits the tolerance relation through valued calculation to make it more rational and practical. |
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| Keywords: | rough set incomplete information system blank value tolerance relation limited valued tolerance relation |
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