Department of Computer Science;
Tianjin University of Technology;
Tianjin 300191;
China College of Information Technical Science;
Nankai University;
Tianjin 300071;
China;
College of Software;
Nankai University;
Tianjin 300071;
China;
Department of Computer Science;
Tianjin University of Technology;
Tianjin 300191;
China;
System Institute;
Chinese Academy of Sciences;
Beijing 100864;
China;