AUTHOR=Zhou Ligang , Qiu Tiejun , Rong Yanhai , Peng Shuang , Li Wei , Xie Longjie TITLE=An economic analysis method for ship charging and swapping station in smart grid JOURNAL=Frontiers in Energy Research VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2025.1536201 DOI=10.3389/fenrg.2025.1536201 ISSN=2296-598X