Equivalence and approximate equivalence problem in cognitive learning
FAN Jian-cong 1,LIANG Yong-quan 1,TANG Lei-yu 2,RUAN Jiu-hong 3
Computer Engineering and Applications . 2008, (21): 96 -98 .  DOI: 10.3778/j.issn.1002-8331.2008.21.026