[1] China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China
[2] Shandong Univ Technol, Sch Sci, Zibo 255049, Peoples R China
[3] Yantai Univ, Sch Math & Informat Sci, Yantai 264005, Peoples R China
[4] Curtin Univ, Dept Math & Stat, Perth, WA 6845, Australia
[5] Zhongnan Univ Econ & Law, Dept Math, Wuhan 430073, Peoples R China