1. Innovative Information Industry Research Center, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong, China
2. Shenzhen Key Laboratory of Internet Information Collaboration, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong, China
3. Department of Computer Science and Information Engineering, National University of Kaohsiung, Kaohsiung, Taiwan
4. Department of Computer Science and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
5. Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan
6. Department of Industrial and Information Management, National Cheng Kung University, Tainan, Taiwan