| 双论域上的决策粗糙集模型及其刻画 |
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| 引用本文： | 司彦飞,刘超,吴明芬.双论域上的决策粗糙集模型及其刻画[J].五邑大学学报(自然科学版),2014(2):19-24. |
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| 作者姓名： | 司彦飞 刘超 吴明芬 |
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| 作者单位： | 五邑大学计算机学院,广东江门529020 |
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| 基金项目： | 国家自然科学基金资助项目（No.11271040）;广东省自然科学基金资助项目（S201101000368I）;江门市科技计划项目（20120030093981,20120030096094,20130100230255）;中国科学院计算技术研究所智能信息处理重点实验室开放课题资助项目（LIP2010-5） |
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| 摘 要： | 在决策粗糙集的基础上,对论域进行了拓展,构造了双论域上的决策粗糙集模型.依据条件概率构造了双论域上决策粗糙集的上、下近似集,并得到相应的正域、负域和边界域的定义;讨论了双论域上决策粗糙集模型的一些基本性质;通过实例给出了双论域上决策粗糙集模型在医疗诊断系统中的应用.
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| 关 键 词： | 决策粗糙集模型 广义近似空间 (α β)-上近似 (α β)-下近似 |
The Characterization of Decision-Theoretic Rough Set Model Based on Double Universes |
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| SI Yan-fei,LIU Chao,WU Ming-fen.The Characterization of Decision-Theoretic Rough Set Model Based on Double Universes[J].Journal of Wuyi University(Natural Science Edition),2014(2):19-24. |
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| Authors: | SI Yan-fei LIU Chao WU Ming-fen |
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| Institution: | (School of Computer Science, Wuyi University, Jiangmen 529020, China) |
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| Abstract: | Based on the decision-theoretic rough set model, the universe of the model is extended, and a decision-theoretic rough set model based on double universes is defined. First, the upper （lower） approximation sets of the model are constructed according to conditional probability. Second, three disjoint regions called positive region, boundary region and negative region are defined. Then, some basic properties are discussed. Finally, a practical example that adopts the double-universe model in diagnostic systems is provided. |
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| Keywords: | decision-theoretic rough set models generalized approximation spaces （α β）-upper approximation （α β）-lower approximation |
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