[Zhang, J. I. N.;Qu, Peiqi] Hunan Normal Univ, Coll Informat Sci & Engn, Changsha, Peoples R China.^[Luo, Meng;Sun, Cheng] Hunan Normal Univ, Coll Math & Stat, Changsha, Peoples R China.^[Zhang, J. I. N.] Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha, Peoples R China.