1. School of Information Science and Engineering, Yunnan University, Kunming 650091, China.
2. School of Information Science and Engineering, Yunnan University, Kunming 650091, China, and also with the School of Automation, Southeast University, Nanjing 210096, China.
3. School of Mathematics, Southeast University, Nanjing 210096, China, and also with the Yonsei Frontier Laboratory, Yonsei University, Seoul 03722, South Korea (e-mail: jdcao@seu.edu.cn)
4. Department of Innovative Technologies, National Research Tomsk State University, 634050 Tomsk, Russia.