1. School of Automation and Information Engineering, Sichuan University of Science and Engineering, Yibin 644000, China
2. Artificial Intelligence Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Yibin 644000, China
3. Sichuan Shuneng Electric Power Company Ltd., Chengdu 610000, China
4. School of Engineering and Technology, The Open University of Sichuan, Chengdu 610073, China
5. Engineering Research Center of Integration and Application of Digital Learning Technology, Ministry of Education, Beijing 100039, China