Tan, Xiangyun
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (F2024105020)
Fundamental Research Funds for the Central Universities (2024JBZY003)
Beijing Natural Science Foundation (L221012)
Science and Technology Research and Development Plan of China Railway (P2023S006)
Article History
Accepted: 24 July 2025
First Online: 19 August 2025
Declarations
:
: The authors have no competing interests to declare that are relevant to the content of this article.
: This study does not involve human participants or animals, and therefore did not require ethical approval. All data used in this research were obtained from publicly available sources and were handled in accordance with relevant ethical guidelines.