| 信息系统中知识的距离及基于知识距离的属性约简算法 |
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| 引用本文： | 郭林鹏,周观民,徐久成. 信息系统中知识的距离及基于知识距离的属性约简算法[J]. 河南师范大学学报(自然科学版), 2008, 36(5) |
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| 作者姓名： | 郭林鹏 周观民 徐久成 |
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| 作者单位： | 河南师范大学,计算机与信息技术学院,河南,新乡,453007;济源职业技术学院,机电系,河南,济源,454650 |
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| 基金项目： | 河南省自然科学基金，河南省高等学校新世纪优秀人才支持计划 |
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| 摘 要： | 从粒度计算的观点出发,给出了信息系统中知识距离的定义,指出利用知识距离可以度量信息系统中知识的粗糙性,分析了其相关性质.提出了一种基于知识距离的启发式属性约简算法,算法不需求核,对无核的特殊信息系统计算约简更加有效.
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| 关 键 词： | 粗糙集理论 信息系统 知识距离 属性约简 |
Knowledge Distance in Information Systems and Attribute Reduction Algorithm Based on It |
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| GUO Lin-peng,ZHOU Guan-min,XU Jiu-cheng. Knowledge Distance in Information Systems and Attribute Reduction Algorithm Based on It[J]. Journal of Henan Normal University(Natural Science), 2008, 36(5) |
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| Authors: | GUO Lin-peng ZHOU Guan-min XU Jiu-cheng |
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| Abstract: | Referring the concept of the symmetric difference of sets,from the viewpoint of the granular computing,knowledge distance in information systems is defined in the paper,and its properties are studied too.Moreover,the knowledge distance is used to measure the roughness of knowledge.An attribute reduction algorithm based on knowledge distance is proposed,and it is especially effective to information system without core. |
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| Keywords: | rough set information systems knowledge distance attributes reduction |
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