[Gu, Weili] Cent S Univ, Sch Energy & Power Engn, Changsha, Hunan, Peoples R China.^Univ South China, Dept Urban Construct, Hengyang, Hunan, Peoples R China.^[Peng, Haoming] Hunan Inst Technol, Architecture & Engn Dept, Hengyang, Hunan, Peoples R China.