Funding for this research was provided by:
Science and Technology Co-ordination and Innovation Project of Shaanxi Province in China (2016KTZDSF03-02)
National Key Research and Development Program of China (2017YFD0800501)
the innovative talents promotion plan in Shaanxi Province of China (2018KJXX-033)
Chinese Postdoctoral Science Foundation (2018M631166)
Fundamental Research Funds for the Central Universities of China (xjj2018250)
National Science Foundation of China (51909205)
Chinese Postdoctoral Science Foundation (2019T120914)
Article History
Received: 18 May 2019
Accepted: 20 January 2020
First Online: 31 January 2020