[1] Nanjing Univ Posts & Telecommun, Sch Comp, Nanjing 210003, Peoples R China
[2] Fuyang Normal Univ, Coll Informat Engn, Fuyang 236041, Peoples R China
[3] Nanjing Univ Informat Sci & Technol, Sch Comp & Software, Nanjing 210044, Peoples R China
[4] Fuyang Normal Univ, Coll Comp & Informat Engn, Fuyang 236041, Peoples R China
[5] New Valley Univ, Fac Sci, Dept Math, El Kharga 72511, Egypt