Hua Mingang was born in 1980. He is a Ph.D. candidate of the College of Automation Science and Engineering, South China University of Technology. His current interests include stability of stochastic system and stochastic neural networks. E-mail: mghua@yahoo.cn Deng Feiqi was born in 1961. He is a professor and director for Ph.D. student in South China University of Technology. His current interests include system engineering, stability and robust control of stochastic large-scale system. Peng Yunjian was born in 1974. He is a teacher in South China University of Technology. His current interests include stability and control of stochastic power system.