WANG Hong-Xia Received her B. Sc. degree in applied mathematics in 2003, and the M. Sc. degree in computational mathematics in 2005, both from Harbin Institute of Technology. Now, she is a Ph.D. candidate in control science and engineering at Harbin Institute of Technology. Her research interest covers H∞ preview control, H∞ control, and time delay systems. E-mail: whxl123@126.com ZHANG Huan-Shui Received his Ph.D. degree from Northeastern University in 1997. From 1998 to 2001, he worked as a postdoctoral fellow at Nanyang Technological University, Singa- pore, and from 2001 to 2003 a research fellow at Hong Kong Polytechnic University. Since 1999, he has been a professor at Shandong University. His research interest covers optimal estimation, robust filtering and control, time delay systems, singular systems, wireless communication, and signal processing. Corresponding author of this paper. E-mail: hszhang@sdu.edu.cn