| 集值信息系统基于邻域关系的属性约简 |
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| 引用本文： | 陈子春,秦克云.集值信息系统基于邻域关系的属性约简[J].计算机科学,2010,37(4):205. |
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| 作者姓名： | 陈子春 秦克云 |
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| 作者单位： | 1. 西南交通大学数学学院,成都,610013;西华大学数学与计算机学院,成都,610039
2. 西南交通大学数学学院,成都,610013 |
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| 基金项目： | 国家自然科学基金资助项目(60474022);;四川省重大科技专项配套资金项目(2008GZ0118)资助 |
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| 摘 要： | 集值信息系统是完备信息系统的广义形式,其中的一些对象在某些属性下的取值可能不止一个,反映的是信息的不确定性。在集值信息系统上引入对象的邻域关系,并以每个对象的邻域作为基本集,建立了集值信息系统的粗糙集方法。为了简化知识的表示,进一步在集值信息系统上提出了邻域协调集与邻域约简的概念,并讨论了这种邻域协调集的性质与判定。最后通过区分函数得到了计算集值信息系统邻域约简的方法。
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| 关 键 词： | 集值信息系统 邻域 邻域约简 区分函数 |
| 收稿时间： | 2009/5/14 0:00:00 |
| 修稿时间： | 2009/7/27 0:00:00 |
Attribute Reduction of Set-valued Information Systems Based on Neighborhood Relation |
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| CHEN Zi-chun,QIN Ke-yun.Attribute Reduction of Set-valued Information Systems Based on Neighborhood Relation[J].Computer Science,2010,37(4):205. |
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| Authors: | CHEN Zi-chun QIN Ke-yun |
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| Affiliation: | School of Mathematics/a>;Southwest Jiaotong University/a>;Chengdu 610013/a>;China;School of Mathematics and Computer/a>;Xihua University/a>;Chengdu 610039/a>;China |
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| Abstract: | Set-valued information systems,in which some objects may have more than one value for an attribute,are generalized complete information systems.Introducing a neighborhood relation to set-valued information systems,we established a rough set approach based on the neighborhood of every object as elementary set.Furthermore,in order to simplify knowledge representation,we proposed the concept of neighborhood consistent set and neighborhood reduction,and discussed the properties and judgments of neighborhood con... |
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| Keywords: | Set-valued information system Neighborhood Neighborhood reduction Discernibility function |
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