| 不完备模糊系统的优势关系粗糙集与知识约简 |
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| 引用本文： | 魏利华,唐振民,杨习贝,祁云嵩.不完备模糊系统的优势关系粗糙集与知识约简[J].计算机科学,2009,36(6):192-195. |
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| 作者姓名： | 魏利华 唐振民 杨习贝 祁云嵩 |
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| 作者单位： | 1. 南京理工大学计算机科学与技术学院,南京;210094;德雷塞尔大学信息科学与技术学院,费城,PA19104
2. 南京理工大学计算机科学与技术学院,南京;210094 |
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| 基金项目： | 国家自然科学基金，浙江省教育厅科学研究项目 |
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| 摘 要： | 以不完备模糊决策系统为研究对象,根据拓展的优势关系,构建了粗糙模糊集模型,以获取不完备模糊决策系统中的"at least"和"atmost"决策规则.为了获取简化的"at least"和"at most"规则,在不完备模糊决策系统中,提出了两种相对约简(相对下近似约简与相对上近似约简)的概念,给出了求得这两种约简的判定定理及区分函数,并进行了实例分析.
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| 关 键 词： | 不完备模糊决策系统 优势关系 粗糙模糊集 决策规则 相对约简 |
| 收稿时间： | 2008/7/24 0:00:00 |
| 修稿时间： | 2008/10/21 0:00:00 |
Dominance-based Rough Set Approach and Knowledge Reductions in Incomplete Fuzzy System |
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| WEI Li-hua,TANG Zhen-min,YANG Xi-bei,QI Yun-song.Dominance-based Rough Set Approach and Knowledge Reductions in Incomplete Fuzzy System[J].Computer Science,2009,36(6):192-195. |
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| Authors: | WEI Li-hua TANG Zhen-min YANG Xi-bei QI Yun-song |
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| Affiliation: | School of Computer Science and Technology;Nanjing University of Science and Technology;Nanjing 210094;China;College of Information Science & Technology;Drexel University;Philadelphia;Pa 19104;USA |
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| Abstract: | A rough fuzzy set model was constructed in the incomplete fuzzy decision system by using an extended dominance relation.By the proposed rough fuzzy approximation,all "at least" and "at most" decision rules can be generated from the incomplete fuzzy decision system.Moreover,to obtain the simplified "at least" and "at most" rules,two types of knowledge reductions,the relative lower and upper approximate reducts are proposed.These two types of reducts are minimal subsets of the attributes,which preserve the me... |
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| Keywords: | Incomplete fuzzy decision system Dominance relation Rough fuzzy set Decision rules Relative reduct |
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