1. School of Mathematical Science, Heilongjiang University, Harbin, People's Republic of China
2. School of Engineering, University of South Wales, Pontypridd, UK
3. Heilongjiang Provincial Key Laboratory of the Theory and Computation of Complex Systems, Heilongjiang University, Harbin, People's Republic of China
4. School of Automation, Harbin University of Science and Technology, Harbin, People's Republic of China