1. Computer College, Qinghai Normal University, Xining 810008, China
2. The State Key Laboratory of Tibetan Intelligent Information Processing and Application, Xining 810008, China
3. Beijing Key Laboratory of Internet Culture and Digital Dissemination Research, Beijing Information Science and Technology University, Beijing 100101, China
4. Key Laboratory of Internet of Things of Qinghai Province, Xining 810016, China
5. Academy of Plateau Science and Sustainability, Xining 810016, China