1. Internet of things perception and big data analysis key Laboratory of Nanchong City, China West Normal University, Nanchong, SiChuan, China
2. School of Computer, China West Normal University, Nanchong, SiChuan, China
3. Key Laboratory of Hunan Province for Internet of Things and Information Security, Xiangtan University, Xiangtan, Hunan, China
4. University of Sydney and Shanghai AI Laboratory, Shanghai, China