[Lu, Chun] Cent China Normal Univ, Minist Educ, Educ Informatizat Strategy Res Base, Wuhan, Hubei, Peoples R China.
[Yang, Wei; Yang, Xiao] Cent China Normal Univ, Natl Engn Res Ctr Elearning, Wuhan, Hubei, Peoples R China.
[Wu, Longkai] Cent China Normal Univ, Fac Artificial Intelligence Educ, Wuhan, Hubei, Peoples R China.
[Lu, Chun; Wu, Longkai; Yang, Wei; Yang, Xiao] Cent China Normal Univ, Sci Hall, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.