1. School of Mechanical and Electrical Engineering Beijing Information Science and Technology University Beijing China
2. Department of Head & Neck Surgery Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Peking University Cancer Hospital & Institute Beijing China
3. School of Automation Beijing University of Posts and Telecommunications Beijing China
4. Beijing Key Laboratory of Rehabilitation Technical Aids for Old‐Age Disability and Key Laboratory of Neuro‐functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs National Research Center for Rehabilitation Technical Aids Beijing China