1. School of Electrical and Information Engineering, Anhui University of Technology, Ma'anshan, Anhui, China
2. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan, Anhui, China
3. Co-Innovation Center for Information Supply & Assurance Technology, Anhui University of Technology, Hefei, Anhui, China
4. Department of the Built Environment, National University of Singapore, Singapore