1. Department of Automatic Control Engineering, Feng Chia University, Taichung 40724, Taiwan
2. Ph.D. Program of Electrical and Communications Engineering, Feng Chia University, Taichung 40724, Taiwan
3. Department of Anesthesiology, Changhua Christian Hospital, Changhua 50051, Taiwan
4. Artificial Intelligence Development Center, Changhua Christian Hospital, Changhua 50051, Taiwan
5. College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China