摘要
可变精度粗糙集和多粒度粗糙集都是在不可分辨关系的基础上对经典粗糙集进行扩展.为了融合这两种扩展模型各自的优点,在多粒度环境中,构建了可变精度多粒度粗糙集,其中包括可变精度多粒度乐观近似和可变精度多粒度悲观近似两种形式.讨论了可变精度多粒度粗糙集的相关性质,并对可变精度多粒度粗糙集和经典的多粒度粗糙集进行了对比分析.最后得出结论,在多粘度框架下,采用变精度的方法,可以进一步提高近似精度.
As the two important expansions of the classical rough set, variable precision rough set and muhigran- ulation rough set are both constructed on the basis of the indiscernibility relations. To integrate the good points of these two expanded rough sets, in the multigranulation environment, the variable precision multigranulation rough set models are proposed, which include＇ variable precision multigranulation optimistic approximation and muhigranulation rough sets are discussed, but also the relationship between variable precision muhigranulation rough set and the classical muhigranulation rough set are deeply investigated. Finally, it is concludeel that under multigraualatiov frame, the accuracy tff approximation can be improved by the variable precision approach.
出处
《江苏科技大学学报（自然科学版）》
CAS
2012年第1期65-69,共5页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家自然科学基金资助项目(61100116)
江苏省自然科学基金资助项目(BK2011492)
江苏省高校自然科学基金资助项目(11KJB520004)
中国博士后科学基金资助项目(20100481149)
江苏省博士后科学基金资助项目(1101137C)
关键词
多粒度粗糙集
可变精度粗糙集
可变精度多粒度粗糙集
multigranulation rough set
variable precision rough set
variable precision multigranulation rough set
作者简介
窦慧莉(1980-),女,江苏连云港人,讲师,研究方向为粒计算与智能信息处理.E-mail:douhuili@163.com.
