1. Key Laboratory of Knowledge Engineering with Big Data of the Ministry of Education, Hefei University of Technology, Hefei 230002, China
2. School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230002, China
3. National Smart Eldercare International S&T Cooperation Base, Hefei University of Technology, Hefei 230002, China
4. Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA