[Yang, Bing; Liu, Tingting] Hubei Univ, Sch Educ, 368 Youyi Rd, Wuhan 430062, Hubei, Peoples R China.
[Subramanian, Sriram; Liu, Tingting; Zhang, Zhaoli; Liu, Hai] Cent China Normal Univ, Natl Engn Res Ctr E Learning, Wuhan 430079, Peoples R China.
[Ju, Jianping] Hubei Business Coll, Sch Artificial Intelligence, Wuhan 430079, Peoples R China.
[Tang, Jianyin] Changchun Univ Sci & Technol, Sch Electromech Engn, Changchun 130022, Peoples R China.
[Liu, Hai] UCL, UCL Interact Ctr, London, England.