| 一种基于变精度粗糙集的规则提取方法研究 |
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| 引用本文： | 杜昌平,周德云.一种基于变精度粗糙集的规则提取方法研究[J].西北工业大学学报,2006,24(3):380-383. |
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| 作者姓名： | 杜昌平 周德云 |
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| 作者单位： | 西北工业大学,电子信息学院,陕西,西安,710072 |
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| 基金项目： | 教育部“新世纪优秀人才支持计划”(05XE0151)资助 |
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| 摘 要： | 主要研究了变精度粗糙集的下近似集,得到了变精度粗糙集的下近似集和属性集合基数之间的关系,提出了一种易实现的变精度粗糙集决策表约简算法。该算法分2步进行决策表约简计算:①计算决策表核;②在决策表核的基础上计算决策表最小约简。仿真实验结果表明所提出的变精度粗糙集约简算法计算简单、容易实现。
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| 关 键 词： | 变精度粗糙集 决策表 属性 |
| 文章编号： | 1000-2758(2006)03-380-04 |
| 收稿时间： | 2005-09-05 |
| 修稿时间： | 2005年9月5日 |
Better Method for Determining Features in Decision Table Based on the Variable Precision Rough Set (VPRS) Theory |
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| Du Changping,Zhou Deyun.Better Method for Determining Features in Decision Table Based on the Variable Precision Rough Set (VPRS) Theory[J].Journal of Northwestern Polytechnical University,2006,24(3):380-383. |
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| Authors: | Du Changping Zhou Deyun |
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| Abstract: | Purpose.Refs.11 and 12 presented methods for determining features in decision table based on rough set theory.In our opinion,the features in decision table can be determined much better by using VPRS theory and the theorem suggested and proved by us in this paper.In the full paper,we explain our method in much detail;here we give only a briefing.Theorem 1 in the full paper,result of our research on VPRS,enables us to make our method for determining features in decision table much faster and much easier to implement.The above conclusion that our method for determining features in decision table is much better than those in Refs.11 and 12 is based on a detailed discussion of the complexities of the three different methods in the full paper.Simulation results,as summarized in Tables 1 and 2 in the full paper,confirm the validity of the above-mentioned conclusion. |
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| Keywords: | variable precision rough set(VPRS) decision table feature |
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