Wu, Xiang-Long
Liu, Liu
Li, You-Jia
Luo, Jie
Gai, Dong-Wei
Lu, Ting-Li
Mei, Qi-Bing https://orcid.org/0000-0001-7460-5115
Funding for this research was provided by:
the National Natural Science Foundation of China (21202130)
the Fundamental Research Funds for the Central Universities (3102014JCQ15005)
the Natural Science Foundation Research Project of Shaanxi Province (2015JM2067)
the Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University (Z2017239)
the national innovation experiment program for university students (201610699258)
Article History
Received: 28 September 2017
Accepted: 10 February 2018
First Online: 2 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.