Funding for this research was provided by:
the Program for National Natural Science Foundation of China (51578170)
the Program for National Natural Science Foundation of China (51678173)
Natural Science Foundation of Guangdong Province, China (2017A030313298)
Key Program of the National Natural Science Foundation of China and High-speed Rail Joint Foundation (U1334209)
2019 Guangzhou University Full-time Graduate “Basic Innovation” Project ( (2019GDJC-D11)
Article History
Received: 30 May 2019
Accepted: 17 June 2020
First Online: 29 June 2020
Compliance with ethical standards
:
: This manuscript has not been published or presented elsewhere in part or in entirety and is not under consideration by another journal. We have read and understood your journal’s policies, and we believe that neither the manuscript nor the study violates any of these. There are no conflicts of interest to declare.