1. CINTRA CNRS/NTU/THALES, UMI 3288Research Techno Plaza 50 Nanyang Drive, Border X Block Singapore 637553 Singapore
2. School of Electrical and Electronic EngineeringNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
3. School of AutomationHangzhou Dianzi University Hangzhou Zhejiang 310018 China
4. Department of Biomedical EngineeringThe Chinese University of Hong Kong New Territories Hong Kong SAR 999077 China