[Sun, Cheng] Hunan Normal Univ, Sch Math & Stat, Changsha 410081, Peoples R China.
[Zhang, Jin; Sun, Cheng] Hunan Normal Univ, Key Lab Comp & Stochast Math, Minist Educ, Changsha 410081, Peoples R China.
[Qu, Peiqi; Zhang, Jin; Wu, Xingjin; Zhang, Shiwen] Hunan Normal Univ, Coll Informat Sci & Engn, Changsha 410081, Peoples R China.
[Zhang, Jin; Feng, Peng] Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha 410114, Peoples R China.
[Zhang, Jin; Tao, Zhanya] Hunan Leran Intelligent Technol Ltd, Changsha 410221, Peoples R China.