1. School of Automation, China University of Geosciences,Wuhan,P. R. China,430074
2. Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System,Quanzhou,P. R. China,362000
3. College of Science, Binzhou University,Binzhou,P. R. China,256600
4. School of Electrical Engineering and Automation, Hubei Normal University,Huangshi,P. R. China,435002