[Li, Wenjie] Kunming Univ Sci & Technol, Dept Syst & Appl Math, Kunming 650093, Yunnan, Peoples R China.
[Ji, Jinchen] Univ Technol Sydney Broadway, Sch Mech & Mechatron Engn, Ultimo, NSW, Australia.
[Huang, Lihong] Changsha Univ, Coll Math & Comp Sci, Changsha, Peoples R China.
[Huang, Lihong] Changsha Univ Sci & Technol, Sch Math & Stat, Changsha, Peoples R China.
[Cai, Zuowei] Hunan Womens Univ, Dept Informat Technol, Changsha, Peoples R China.