[1] Ningbo Univ, Ningbo Collaborat Innovat Ctr Nonlinear Harzard S, Ningbo 315211, Zhejiang, Peoples R China
[2] Ningbo Univ, Fac Sci, Ningbo 315211, Zhejiang, Peoples R China
[3] China Univ Min & Technol, Dept Math, Beijing 100083, Peoples R China
[4] E China Normal Univ, Shanghai Key Lab Trustworthy Comp, Shanghai 200062, Peoples R China