This research was financially supported by Natural Science Foundation of China (NSFC Grant No. 51778504, Multiple circulations co-driven by lake breeze and urban heat islands in inner cities for enhancing air environment; NSFC Grant No. 51304233, Multi-physics diffusion of leaked natural gas and backward time inverse identification of leakage sources; NSFC Grant No. 51208192, Instability theory and inverse convection design of air flow patterns in the large space), Hunan Provincial Natural Science Foundation for Distinguished Young Scholars supported by Hunan Provincial Government (Grant No. 14JJ1002, Multiple fluid mechanisms of urban ventilation and its safety through source identification), Research Project supported by The Education Department of Hunan Province (Indoor thermal environment and thermal comfort in Hunan transition seasons, Grant No. 14C0321). Prof. F.Y. Zhaoand Prof. H.Q. Wang would also like to acknowledge the financial support from the Collaborative Innovation Center for Building Energy Conservation and Environment Control, Zhuzhou, Hunan Province, China.
