1. School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan, China
2. Shandong Labor Vocational and Technical College, Jinan, China
3. Joint SDU-NTU Centre for Artificial Intelligence Research (C-FAIR), Shandong University, Jinan, China
4. Department of Weizhong Children’s Rehabilitation Center, Jinan, China