School of Educational Information Technology;
Central China Normal University;
Wuhan;
Hubei;
China 430079;
School of Educational Information Technology;
Central China Normal University;
Wuhan;
Hubei;
China 430079;
Department of Electronic and Information Engineering;
Changsha Normal University;
Changsha;
Hunan;
China 410100;
School of Educational Information Technology;
Central China Normal University;
Wuhan;
Hubei;
China 430079;
School of Educational Information Technology;
Central China Normal University;
Wuhan;
Hubei;
China 430079;