[Rafia, Ghoul;He, Jing] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha, Hunan, Peoples R China.^[Sana, Djaidja] Fac Med Algiers Mohamed Maherzi Ex Laperine, Dept Med, Algiers, Algeria.^[Ebrahim, As-Shareef] Cent China Normal Univ, Dept Math, Wuhan, Hubei, Peoples R China.