To whom correspondence should be addressed. E-mail : wzqian@ uestc, edu. cn, qinzg@ uestc.edu. cn Qian Weizhong, born in 1976. He received his B.S. and M.S. degrees from University of Electronic Science and Technology of China (UESTC), Cheng- du, in 1999 and 2002 respectively. He is currently pursuing the Ph. D. degree with the Department of Computer Science and Engineering, UESTC. His research interests include bioinformatics and intelligent computing.