1. iSMART, College of Architecture and Urban Planning, Qingdao University of Technology, Qingdao 266033, China
2. Faculty of Environmental Engineering, The University of Kitakyushu, Fukuoka 808-0135, Japan
3. Piaggio Fast Forward Co., Ltd., Boston, MA 02129, USA
4. School of Architecture, Tianjin Chengjian University, Tianjin 300380, China