National Engineering Research Center for E-Learning, Huazhong Normal University, Wuhan 430079, China
School of Media and Communication, Wuhan Textile University, Wuhan 430079, China
[Shi, Fuqian] College of Information and Engineering, Wenzhou Medical College, Wenzhou 325035, China
[Zhao, Chengling] Department of Information Technology, Huazhong Normal University, Wuhan 430079, China
[Wan, Liyong] National Engineering Research Center for E-Learning, Huazhong Normal University, Wuhan 430079, China, School of Media and Communication, Wuhan Textile University, Wuhan 430079, China