摘要
针对不完备决策信息系统问题,在分析已有粗糙集及其扩展方法局限性的基础上,提出了一种基于变精度容差关系的扩展粗糙集方法。该方法通过判断对象之间不可分辨可能性的大小来划分容差类,进而得到相应的上、下近似集,并在理论与实例中与基于容差关系、相似关系、限制容差关系等的扩展粗糙集进行了比较分析,论证了该方法的合理性和有效性。
After analyzing the limitation of the rough set and extended rough set approaches for incomplete decision information systems, a new extended rough set approach based on variable-precision tolerance relation is presented. This approach classifies the objects according to their indiscernible probability and defines the upper and lower approximation. Both theoretical analysis and experimental results are made to validate it by comparing it with tolerance relation, similarity relation and limited tolerance relation.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第3期477-480,共4页
Systems Engineering and Electronics
基金
湖南省社会科学基金(05YB74)
湖南省软科学计划项目(06FJ4126)资助课题
关键词
不完备决策信息系统
容差关系
相似关系
限制容差关系
修正限制容差关系
变精度容差关系
incomplete decision information systems
tolerance relation
similarity relation
limited tolerance relation
modified tolerance relation
variable-precision tolerance relation
