1. Department of Mathematics, Harbin University, Harbin 150086, China
2. Heilongjiang Provincial Key Laboratory of the Intelligent Perception and Intelligent Software, Harbin University, Harbin 150080, China
3. School of Mathematical Science, Heilongjiang University, Harbin 150080, China
4. Heilongjiang Provincial Key Laboratory of the Theory and Computation of Complex Systems, Heilongjiang University, Harbin 150080, China