[Wang, Xu;Wang, Minghua;Wang, Yan] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang, Peoples R China.^[Wang, Minghua] Univ South China, Cooperat Innovat Ctr Nucl, Fuel Cycle Technol & Equipment, Hengyang, Peoples R China.^[Yi, Lingzhi] Univ South China, Sch Civil Engn, Hengyang, Peoples R China.