1. Doctor, School of Computer Science, Chongqing Univ., Chongqing 400044, China.
2. Lecturer, College of Engineering, IT and Environment, Charles Darwin Univ., Sydney, NSW 2027, Australia. ORCID: .
3. Senior Lecturer, School of Software and Electrical Engineering, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia.
4. Professor, School of Computer Science, Chongqing Univ., Chongqing 400044, China (corresponding author).