Gao, Xing Hui
Ma, Le Rong
Zhou, Hai Yun
Funding for this research was provided by:
National Natural Science Foundation of China under grant (11071053)
Natural Science Basic Research Plan in Shaanxi Province of China (2014JM2-1003, 2016JM6082)
Scientic research project of Yan’an University (YD2016-12)
Article History
Received: 2 September 2016
Accepted: 14 March 2018
First Online: 11 April 2018