Two-direction improper singular rough sets with variable precision and its application
Guo Zhi-lin · Journal of Naval University of Engineering · 2008
This paper presented the concepts of improper singular rough sets based on the theory of singular rough sets,and established the general mathematics structures of two-direction improper singular rough sets and the two-direction improper singular rough sets with variable precision.After dealing with its approximate operator nature,this paper gave an example to show the application of the two-direction improper singular rough sets with variable precision.