1. Tianjin Key Laboratory for Advanced Signal Processing and College of Science, Civil Aviation University of China, Tianjin, People's Republic of China
2. Department of Mathematics, Hangzhou Normal University, Hangzhou, People's Republic of China
3. Research Center for Interneural Computing, China Medical University Hospital, China Medical University, Taichung, Taiwan
4. Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan