1. School of Big Data & Software Engineering, Chongqing University, China
2. School of Big Data & Software Engineering, Chongqing University, Chongqing, China
3. Computer Science Department, Bowling Green State University, USA
4. College of Computer Science, Chongqing University, China
5. College of Physics and Electronic Information Engineering, Henan Polytechnic University, China
6. Big Data Institute, Qilu University of Technology, Jinan, Shandong, P.R. China
7. College of Computer Science and Technology, Ocean University of China, China