Hu, B.
Tian, X. L.
Shi, W. N.
Zhao, J. Q.
Wu, P.
Mei, S. T.
Funding for this research was provided by:
the Shaanxi Province Science and Technology Development Program (2014K15-03-02)
National Training Programs of Innovation and Entrepreneurship for Undergraduates (201610710081)
the Special Fund for Basic Scientific Research of Central Colleges, Chang’an University (310829163406)