[Zhang, Zhaoli; Liu, Hai] Cent China Normal Univ, Natl Engn Res Ctr E Learning, Wuhan 430079, Peoples R China.
[Li, Duantengchuan] Wuhan Univ, Sch Comp Sci, Wuhan 430072, Peoples R China.
[Zheng, Chao; Shen, Xiaoxuan; Xiong, Neal N.] Cent China Normal Univ, Natl Engn Lab Educ Big Data, Wuhan 430079, Peoples R China.
[Lin, Ke] Harbin Inst Technol, Dept Control Sci & Engn, Shenzhen 518055, Peoples R China.
[Wang, Jiazhang] Northwestern Univ, Evanston, IL 60208 USA.