AUTHOR=Meng Dajiang , Zhang Ruwei , Gu Yuan , Zhang Baojin , Lu Yunqian , Lin Jiangnan , Wang Lijie TITLE=Estimation of gas hydrate and free gas saturation using the rock physics model based on constrained least squares and trust region method in the Shenhu Area, South China Sea JOURNAL=Frontiers in Earth Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1582129 DOI=10.3389/feart.2025.1582129 ISSN=2296-6463