1. College of Computer Science and Electronic Engineering, Hunan University, Changsha, China
2. School of Computer Science, Liaocheng University, Liaocheng, China
3. School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK, USA
4. Department of Computer Science and Engineering, Guangdong Provincial Key Laboratory of Brain-inspired Intelligent Computation, Southern University of Science and Technology, Shenzhen, China