[1] Fujian Agr & Forestry Univ, Coll Comp & Informat Sci, Fuzhou 350002, Peoples R China
[2] Great Bay Univ, Dept Math, Dongguan 523000, Guangdong, Peoples R China
[3] Great Bay Univ, Dept Phys, Dongguan 523000, Guangdong, Peoples R China
[4] Huazhong Univ Sci & Technol, Ctr Math Sci, Wuhan 430074, Hubei, Peoples R China
[5] IIT, Dept Appl Math, Chicago, IL 60616 USA