| 粗糙集信息观中的绝对约简 |
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| 引用本文： | 陈凤娟,孙静.粗糙集信息观中的绝对约简[J].计算机工程与科学,2010,32(5):97-99. |
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| 作者姓名： | 陈凤娟 孙静 |
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| 作者单位： | 辽宁对外经贸学院信息技术系,辽宁,大连,116052 |
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| 摘 要： | 绝对约简是粗糙集理论研究的基本内容之一,而在粗糙集的信息观中,绝对约简的相关定理还存在着一些不足。本文分析了现有的一些关于划分与知识信息熵的关系定理以及绝对约简的充要条件定理,提出新的关于划分和条件信息熵的对应关系定理,并给出其证明过程;依据该定理提出新的粗糙集信息观的绝对约简的充要条件,并给出相关证明。
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| 关 键 词： | 粗糙集 信息熵 条件信息熵 绝对约简 |
| 收稿时间： | 2009-11-15 |
| 修稿时间： | 2010-02-09 |
Absolute Reduction in the Information View of Rough Sets |
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| CHEN Feng-juan,SUN Jing.Absolute Reduction in the Information View of Rough Sets[J].Computer Engineering & Science,2010,32(5):97-99. |
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| Authors: | CHEN Feng-juan SUN Jing |
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| Affiliation: | Department of Information Technology/a>;Liaoning University of International Business and Economics/a>;Dalian 116052/a>;China |
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| Abstract: | The absolute reduction is a basic element of the rough set theory research.In the information view of rough sets there are still some drawbacks on the relevant theorems of the absolute reduction.Some existing theorems about the relationship between division and information entropy and theorems about the necessary and sufficient conditions of absolute reduction are analyzed.Then some new theorems about the relationship between division and conditional information entropy have been proposed.And the process of... |
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| Keywords: | rough set information entropy conditional information entropy absolute reduction |
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