Qiu, Zhaowen
Li, Xiaoxia
Hao, Yanzhao
Deng, Shunxi
Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities (310822152006, 310822151024)
the Chinese National Natural Science Fund (51478045)
the Key Project of Major Problems in Science and Technology in Shaanxi Province, China (2012KTZB03-01-04)