Zhang, Rui
Tang, Sheng
Liu, Wu
Zhang, Yongdong
Li, Jintao
Funding for this research was provided by:
National Nature Science Foundation of China (61173054)
Beijing Natural Science Foundation (4152050)
863 Project (2014AA015202)
the Funds for Creative Research Groups of China under Grant (61421061)
the Cosponsored Project of Beijing Committee of Education