| 不完备模糊决策信息系统的粗集模型与精度约简 |
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| 引用本文： | 魏大宽,周献中,黄兵.不完备模糊决策信息系统的粗集模型与精度约简[J].计算机科学,2006,33(6):182-185. |
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| 作者姓名： | 魏大宽 周献中 黄兵 |
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| 作者单位： | 湖南科技学院信息工程学院,永州425006;南京理工大学自动化系,南京210094;南京大学工程管理学院,南京210093;南京审计学院计算机科学与技术系,南京210029 |
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| 基金项目： | 国家自然科学基金;江苏省教育厅自然科学基金 |
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| 摘 要： | 在不完备信息系统和模糊决策信息系统概念及其粗集模型的基础上，本文提出了不完备模糊决策信息系统的概念，给出了不完备模糊决策信息系统的粗糙集模型，它既不同于不完备近似空间上的信息系统又不同于完备空间上的模糊决策信息系统。该模型是完备模糊决策信息系统和经典决策信息系统粗糙集模型的推广。文中还给出了系统的精度约简概念及其约简算法。
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| 关 键 词： | 粗糙集 相容关系 不完备信息系统 模糊决策信息系统 精度约简 |
Rough Set Model and Precision Reduction in Incomplete and Fuzzy Decision Information Systems |
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| WEI Da-Kuan,ZHOU Xian-Zhong,HUANG Bing.Rough Set Model and Precision Reduction in Incomplete and Fuzzy Decision Information Systems[J].Computer Science,2006,33(6):182-185. |
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| Authors: | WEI Da-Kuan ZHOU Xian-Zhong HUANG Bing |
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| Affiliation: | School of Information Engineering, Hunan University of Science and Engineering, Yongzhou 425006;school of Engineering Management, Nanjing University, Nanjing 210093;Department of Computer Science and Technology, Naniing Audit University, Nanjing 210029;Department of Automation, Nanjing University of Science and Technology, Nanjing 210094 |
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| Abstract: | Incomplete space and fuzzy decision information system exist in many applications, and their models and methods for knowledge reduction are not equivalent to incomplete Pawlak space information system or fuzzy decision inT formation system in complete space. This paper proposes the concept of incomplete and fuzzy decision information sys- tems based on incomplete approximation space and fuzzy decision information systerrL, and gives the rough set model of incomplete and fuzzy decision information systems by the tolerance relation. The model generalizes rough set model of complete fuzzy decision information systems and traditional decision information systems. In this paper the concept of precision reduction and the simple algorithm are presented. |
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| Keywords: | Rough set Tolerance relation Incomplete information system Fuzzy decision system Precision reduction |
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