中文摘要：

Lijuan Xu was born in 1983. She is currently working toward the M.E. degree in control theory and control engineering in the College of Information Engineering, Yangzhou University. Her current research interests include stochastic control and robust control. E-mail： xulijuandh@ 126.com Corresponding author.Tianping Zhang was born in 1964. He received the B.S. degree in mathematics from Yangzhou Teachers College, in 1986, the M.S. degree in operations research and control theory from East China Normal University, in 1992, and the Ph.D. degree in automatic control theory and applica- tions from Southeast University, in 1996. He is now a professor in the College of InformationEngineering, Yangzhou University. His current research interests include fuzzy control, adaptive control, and nonlinear control. E-mail： tpzhang@yzu.edu.cn Yang Yi was born in 1980. He received the M.S. degree in computer science from Yangzhou Uni- versity, in 2005 and the Ph.D. degree in control theory and control engineering from Southeast University, in 2008. He is now a lecturer in the College of Information Engineering, Yangzhou University. His research interests include stochastic control and adanfive control.E-mail： yiyangcontrol@ 163.com