1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
2. The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, People's Republic of China
3. Division of Science, Engineering and Health Studies, College of Professional and Continuing Education, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China