School of Computer Science and Engineering;
Tianjin University of Technology;
Tianjin 300384;
China;
School of Computer Science;
University of Lincoln;
Lincoln LN67TS;
UK;
School of Automation;
Guangdong University of Petrochemical Technology;
Maoming 525000;
China;
School of Mathematics and Information Science;
Guangzhou University;
Guangzhou 510006;
China;