AUTHOR=Yang Lingling , Yuan Yuan TITLE=Multifractal analysis and modification of coal pore structures with impact of clean compound biomass surfactants JOURNAL=Frontiers in Physics VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2025.1572999 DOI=10.3389/fphy.2025.1572999 ISSN=2296-424X