摘要
分析了变精度粗糙集模型约简异常出现的原因,结合变精度粗糙集模型特征,将特定β值上的约简扩展为区间约简,并从分类质量、β相对正域和决策类三个层次分别对约简进行描述,研究了它们与约简异常之间的关系。区间约简评价因子的提出,对评价及选择区间约简有重要指导意义。
The reason for reducts anomalies is analyzed based on variable precision rough sets in this paper.The definition of reducts extends from particular β value to β interval corresponding to the characteristics of variable precision rough sets.Reducts are defined and studied from different hiberarchy.viz, the quality of classification,relative positive-region and decision classes, different hiberarchy has different anomalies.A kind of measure for interval reducts is also given in the paper,it is useful for evaluating and selecting interval reducts.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第12期173-176,198,共5页
Computer Engineering and Applications
基金
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60474041)
湖南省自然科学基金(the Natural Science Foundation of Hunan Province of China under Grant No.06JJ20075)。
关键词
变精度粗糙集模型
约简异常
区间约简
Variable Precision Rough Sets Model(VPRSM)
reducts anomalies
interval reducts
作者简介
周杰(1982-),硕士,研究领域:粗糙集理论及应用,数据挖掘;E-mail :jie_jpu@tom.com王加阳(1963-),教授,研究领域:粗糙集理论,智能计算,决策支持;罗安(1957-),教授、博导,研究领域:智能控制,电力系统自动化。