1. Institute of Advanced Technology, Nanjing University of Posts and Telecommunications, Nanjing, China
2. College of Automation, Nanjing University of Posts and Telecommunications, Nanjing, China
3. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
4. Old Dominion University, Norfolk, VA, USA
5. Key Laboratory of Knowledge Engineering with Big Data (the Ministry of Education of China), Hefei University of Technology, Hefei, China