Funding for this research was provided by:
National Science Foundation of China (51872238)
National Science Foundation of China (21806129)
Fundamental Research Funds for the Central Universities (310201911cx019)
Fundamental Research Funds for the Central Universities (3102018zy045)
Fundamental Research Funds for the Central Universities (3102019AX11)
Natural Science Basic Research Plan in Shaanxi Province of China (2020JM-118)
Natural Science Basic Research Plan in Shaanxi Province of China (2017JQ5116)
Article History
Received: 21 May 2020
Accepted: 12 June 2020
First Online: 22 June 2020