A New Method for Calculation of the Approximations under the Probabilistic Rough Sets
The rough set theory (RST) can deal with the approximations of an arbitrary subset of a universe by two definable subsets called, respectively, the lower and the upper approximations. Probabilistic rough sets (PRS) model is an extension of RST. In this paper, we propose a new matrix view of PRS and give the matrix representation of the lower and upper approximations of PRS. According to this matrix view, a new method is obtained for calculation of the lower and upper approximations under PRS. An example is given to illustrate processes of calculating the approximations of a concept based on the matrix point of view.
Junbo Zhang Tianrui Li Lei Wang
School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
国际会议
The 2010 International Conference on Intelligent Systems and Knowledge Engineering(第五届智能系统与知识工程国际会议)
杭州
英文
73-76
2010-11-15（万方平台首次上网日期，不代表论文的发表时间）