1. Institute of Applied Mathematics, Shandong University of Technology, Zibo, Shandong, 255049, PRC
2. Lab of Math for Nonlinear Sci, Fudan University, Shanghai, 200433, PRC
3. Institute of Mathematics, Fudan University, Shanghai, 200433, PRC
4. Zibo Managing Office of Water Resources, Zibo, Shandong, 255032, PRC