| 不协调信息系统快速属性分布约简方法 |
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| 引用本文： | 蒋云良,杨章显,刘勇.不协调信息系统快速属性分布约简方法[J].自动化学报,2012,38(3):382-388. |
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| 作者姓名： | 蒋云良 杨章显 刘勇 |
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| 作者单位： | 1.湖州师范学院信息与工程学院 湖州 313000; |
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| 基金项目： | 国家自然科学基金(60803053,60872057,61173123);浙江省自然科学基金项目(R1090244,Y1100070,Y1101237,Y1110944);浙江省公益技术应用研究项目(2011C23132);“信息处理与自动化技术”浙江省重中之重学科开放基金(201100803)资助~~ |
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| 摘 要： | 以条件信息熵为属性选择准则, 设计了基于哈希(Hash)分类的启发式后向贪心算法, 该算法以时间复杂度O (|A| |U| )求解不协调信息系统的分布约简, 其中|A| 是条件属性个数, |U| 是记录数, 并通过实验验证该算法的高效率.
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| 关 键 词： | 不协调信息系统 分布约简 条件信息熵 哈希 |
| 收稿时间： | 2011-4-11 |
| 修稿时间： | 2011-10-28 |
Quick Distribution Reduction Algorithm in Inconsistent Information System |
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| JIANG Yun-Liang,YANG Zhang-Xian,LIU Yong.Quick Distribution Reduction Algorithm in Inconsistent Information System[J].Acta Automatica Sinica,2012,38(3):382-388. |
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| Authors: | JIANG Yun-Liang YANG Zhang-Xian LIU Yong |
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| Affiliation: | 1.School of Information and Engineering, Huzhou Teachers College, Huzhou 313000;2.National Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027;3.School of Computer Science, Hangzhou Dianzi University, Hangzhou 310018 |
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| Abstract: | In this paper, the conditional entropy based criteria is adopted to select proper attribute distribution reduction in an inconsistent information system. The quick distribution reduction algorithm proposed in this paper employees a hash based heuristic backward greedy policy, which could achieve a time complexity of O(|A| |U| ), where |A| is the number of conditional attributes in the inconsistent information system, and |U| is the number of records in the inconsistent information system. At last, the efficiency of the quick distribution reduction algorithm is proved by comparable experiments. |
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| Keywords: | Inconsistent information system distribution reduction conditional information entropy hash |
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