One direction S-rough decision and its decision model
Kaiquan Shi, Yu-Quan Chi · 2005
This paper presents one direction S-rough decision and its decision model and characteristics. One direction S-rough decision is the combination of S-rough decision on (R,F)/sub /spl deg//(X/spl deg/) and S-rough decision on (R,F)/spl deg/(X/spl deg/) ; (R,F)/sub /spl deg//(X/spl deg/), (R,F)/spl deg/(X/spl deg/) are common sets with dynamic characteristics; (R,F)/sub /spl deg//(X/spl deg/), (R,F)/spl deg/(X/spl deg/) are the lower approximation and upper approximation of S-sets (singular sets) X/spl deg//spl sub/U respectively.