1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, P. R. China
2. Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore
3. School of Fashion and Textiles, The Hong Kong Polytechnic University, 999077 Hong Kong S.A.R., China
4. School of Public Security and Emergency Management, Anhui University of Science and Technology, Hefei, Anhui 231131, P. R. China