Notice of Retraction: Algorithms and algorithm analysis of logical difference operation of grade lower approximation operator and variable precision upper approximation operator
2011 ◽
Vol 204-210
◽
pp. 2015-2018
Keyword(s):
Keyword(s):
2010 ◽
Vol 30
(8)
◽
pp. 1991-1994
◽
Keyword(s):