Xie, Jia
Hu, Yu-pu
Gao, Jun-tao
Gao, Wen
Funding for this research was provided by:
National Natural Science Foundation of China (61173151, 61472309, 61303217)
Fundamental Research Funds for the Central Universities, China (JB140115)
Natural Science Foundation of Shaanxi Province, China (2013JQ8002, 2014JQ8313)