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| 集值决策信息系统的知识约简与规则提取 | |
| 引用本文： | 宋笑雪,解争龙,张文修.集值决策信息系统的知识约简与规则提取[J].计算机科学,2007,34(4):182-184. |
| 作者姓名： | 宋笑雪 解争龙 张文修 |
| 作者单位： | 1. 西安交通大学理学院信息与系统科学研究所,西安710049;咸阳师范学院计算机系,咸阳712000 2. 咸阳师范学院计算机系,咸阳712000 3. 西安交通大学理学院信息与系统科学研究所,西安710049 |
| 基金项目： | 国家重点基础研究发展计划(973计划) , 咸阳师范学院校科研和教改项目 |
| 摘 要： | 本文用集值信息系统描述不完备信息系统。在集值信息系统中定义了两种不同的关系：相容关系和优势关系，给出了两种不同关系下集合的上下近似概念及其性质。研究了集值决策信息系统在两种不同关系下的广义决策约简，得到了广义决策约简的判定定理和辨识矩阵，从而得到了约简的具体操作方法。最后，基于两种关系从集值决策信息系统提取了最优广义决策规则，并进行了讨论。 |
| 关 键 词： | 集值信息系统 知识约简 辨识矩阵 决策规则 |
Knowledge Reduction and Rule Extraction in Set-valued Decision Information System |
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| SONG Xiao-Xue,XIE Zheng-Long,ZHANG Wen-Xiu.Knowledge Reduction and Rule Extraction in Set-valued Decision Information System[J].Computer Science,2007,34(4):182-184. | |
| Authors: | SONG Xiao-Xue XIE Zheng-Long ZHANG Wen-Xiu |
| Abstract: | In this paper we describe the incomplete information system by the set-valued information system. The two relations are defined in set-valued decision information system: the tolerance relation and the dominance relation. The rough approximation on these relations is defined, and the different properties of a set-valued information system based on these two relations are studied. Then we give the judgment theorems and the discernibility matrices of the generalized decision reduction in set-valued decision information system based on these relations, from which we provide a material approach to knowledge reduction. Finally, the optimal generalized decision rules are discussed based on these two relations. |
| Keywords: | Set-valued information system Knowledge reduction Discernibility matrices Decision rule |
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