| 核心元素的特征及其在决策树生成中的应用 |
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| 引用本文： | 张梅,徐萍. 核心元素的特征及其在决策树生成中的应用[J]. 陕西师范大学学报(自然科学版), 2004, 32(1): 15-17 |
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| 作者姓名： | 张梅 徐萍 |
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| 作者单位： | [1]西安交通大学管理学院 [2]西安交通大学理学院,陕西西安710049 |
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| 基金项目： | 973国家重大基金资助项目(2002CB312206) |
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| 摘 要： | 利用粗糙集约简的辨识矩阵，给出属性是核心元素的充要条件为该属性是辨识矩阵中单元素集．利用上近似与下近似给出了判断是否核心元素的两个充分条件，指出利用核心元素简化决策树比用熵函数ID3方法简化的决策树更简单．
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| 关 键 词： | 核心元素 粗糙集 决策树 辨识矩阵 约简 |
| 文章编号： | 1672-4291(2004)01-0015-03 |
| 修稿时间： | 2003-08-25 |
Characters of core and its applications to decision tree |
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| ZHANG Mei,XU Ping. Characters of core and its applications to decision tree[J]. Journal of Shaanxi Normal University: Nat Sci Ed, 2004, 32(1): 15-17 |
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| Authors: | ZHANG Mei XU Ping |
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| Affiliation: | ZHANG Mei~1,XU Ping~2 |
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| Abstract: | The sufficient and necessary conditions of the core elements in attributes using reductions from the discernibility matrix of rough set is given. They are the sets with only a single element. Two sufficient conditions are obtained by lower and upper approximations. The results showing that the decision-tree by the core elements is simpler than that by the method ID_3 with entropy function. |
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| Keywords: | rough set decision tree core reduction |
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