[Bao, Kangbo] Lanzhou Univ Finance & Econ, Sch Informat Engn & Artificial Intelligence, Lanzhou 730020, Peoples R China.
[Zhang, Xinan; Bao, Kangbo; Zhang, XA] Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Peoples R China.
[Liang, Guizhen] Xinxiang Univ, Sch Math & Informat Sci, Xinxiang 453003, Henan, Peoples R China.
[Tian, Tianhai] Monash Univ, Sch Math Sci, Melbourne, Vic 3800, Australia.