Guici Chert was born in 1978. He received his M.S. degree in School of Science from Wuhan University of Science and Technology in 2004. He currently is a Ph.D. candidate in Department of Control Science and Engineering in Huazhong University of Science and Technology. His current research interests include robust control and filter design for stochastic systems and stochastic systems with Markov jump.E-mail: gcichen@ yahoo.com.cn Corresponding author.Xiaoplng Wang was born in 1974. She re- ceived her B.S. and M.S. degrees in Department of Automation in Chongqing University at 1997 and 2000 and received Ph.D. degree in Department of Control Science and Engineering in Huazhong University of Science and Technology at 2003. She is working as an associate pro- fessor at Department of Control Science and En- gineering, Huazhong University of Science andTechnology. Her research interests include analysis and control for stochastic systems and complex network. E-mall: wxpwinnie@ 163.com