| 区间值决策信息系统的启发式属性约简 |
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| 引用本文： | 梁春华,张海云.区间值决策信息系统的启发式属性约简[J].计算机工程与应用,2012,48(27):114-118. |
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| 作者姓名： | 梁春华 张海云 |
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| 作者单位： | 1. 山西省财政与税务专科学校经济信息系,太原030024;山西大学计算机与信息技术学院,太原030006
2. 山西大学计算机与信息技术学院,太原,030006 |
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| 基金项目： | 国家自然科学基金(No.71031006,No.70971080,No.60903110) |
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| 摘 要： | 区间值决策信息系统是单值信息系统的一种推广,借助于属性区间值的相似程度在区间值决策系统上引入α极大相容类的概念,定义了一种新的条件信息熵,提出了相对属性内(外)重要度的度量方法,进一步,给出基于α条件信息熵的启发式相对约简算法,通过实验验证了该算法的有效性。
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| 关 键 词： | 区间值决策系统 α极大相容类 α近似约简 相对属性重要度 |
LIANG Chunhua,ZHANG Haiyun.Heuristics attribute reduction in interval-valued decision system |
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| LIANG Chunhua
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ZHANG Haiyun.LIANG Chunhua,ZHANG Haiyun.Heuristics attribute reduction in interval-valued decision system[J].Computer Engineering and Applications,2012,48(27):114-118. |
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| Authors: | LIANG Chunhua ZHANG Haiyun |
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| Affiliation: | 1.Department of Economical Information,Shanxi Finance & Taxation College,Taiyuan 030024,China 2.School of Computer & Information Technology,Shanxi University,Taiyuan 030006,China |
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| Abstract: | Interval-valued decision information systems are generalized models of single-valued information systems.A kind of α maximal tolerance class is introduced by similarity grade of attribute’s interval-value in interval-valued decision system.This paper defines new conditional entropy among attributes in interval-valued information systems and proposes two types of measurement of relative attribute importance,which is inner attribute importance and outer attribute importance.Furthermore,a heuristic relative attribute reduction algorithm based on α conditional information entropy is given,and the validity of the algorithm is illustrated by some experiments. |
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| Keywords: | interval-valued decision system α maximal consistent class α approximation reduction relative attribute importance |
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