1. School of Computer Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
2. School of Electrical and Information Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
3. Beijing Key Laboratory of Intelligent Processing for Building Big Data, Beijing 100044, China
4. Institute of Materials, China Academy of Engineering Physics, Mianyang, Sichuan 621907, China