Corresponding author.Dan Zhao was born in 1979. He received his M.S. degree in operational research and control theory from Northeastern University in 2008. His current research interests include guaranteed cost control and intelligent large-scale system control. E-mail: zhaodan0601101 @yahoo.com.cn Qingling Zhang was born in 1956. He received his Ph.D. degree in control theory and control engineering from Northeastern University in 1995. His current research interests are descriptor system control and guaranteed cost control. E-mail: qlzhang@mail.neu.edu.cn Hell Hu was born in 1979. She received her Ph.D. degree in control theory and control engineering from Northeastern University in 2009. Her current research interests are non-fragile control and ro- bust control. E-mail: huheli2002 @ yahoo.com.cn Chunyuan Zhao was born in 1963. He received his MBA degree from Liaoning University in 2004. His current research interests are descriptor system and nonlinear control. E-mail: zcy2581 @ 163.com