[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R China
[3] GCCST Joint Stock Co Ltd, Gansu 730090, Peoples R China
[4] Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China