[1] School of Mathematics and Computer Science, Yunnan Minzu University, Kunming,650500, China
[2] Hubei International Science and Technology Cooperation Base of Fish Passage, China Three Gorges University, Yichang,443002, China
[3] Laboratory for Industrial and Applied Mathematics, York University, Toronto,M3J1P3, Canada
[4] Department of Applied Mathematics, University of Waterloo, Waterloo,N2L3G1, Canada