1. Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
2. Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
3. Fujian Provincial Key Laboratory of Big Data Mining and Applications, Fujian University of Technology, Fuzhou 350118, China
4. College of Computer and Data Science, Fuzhou University, Fuzhou 350116, China