Funding for this research was provided by:
National Natural Science Foundation of China (61373116)
Shaanxi Science and Technology Co-ordinate Innovation Project (2016KTZDGY04-01)
General projects in the industrial field of Shaanxi (2018GY-013)
Xianyang science and technology project (2017k01-25-2)
Special Research Fund of Shaanxi Educational Committee (16JK1706)
Article History
Received: 16 July 2018
Accepted: 21 December 2019
First Online: 20 January 2020