1. Department of Information Technology, Hunan Police Academy, Changsha, Hunan, China
2. Big Data Development and Research Center, Guangzhou College of Technology and Business, Guangzhou, China
3. College of Computer Science and Electronic Engineering, Hunan University, Changsha, Hunan, China
4. Department of Computer Science and Information Engineering, Providence University, Taichung, Taiwan
5. School of Computer Science and Engineering, Anhui University of Science and Technology, Huainan, China