AUTHOR=Xie Fahao , Zhang Le , Zheng Shanshui , Xu Aijun , Li Zhitao , Dai Jiaxin , Xu Lang TITLE=SOM neural network-based port function analysis: a case study in 21st-century Maritime Silk Road JOURNAL=Frontiers in Marine Science VOLUME=11 YEAR=2025 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2024.1522071 DOI=10.3389/fmars.2024.1522071 ISSN=2296-7745