This session welcomes all papers related to inverse problem, joint inversion, machine learning, machine learning enhanced inversion/imaging, and their applications, etc. Topics include electromagnetic, seismic, acoustic, fluid dynamic and etc. Papers on advancements in inversion method to achieve high resolution imaging with high efficiency, joint inversion method, optimization method, machine learning, and machine learning enhanced inversion/imaging, are very welcomed. Applications include but not limit to solving partial differential equations, chip design optimization, antenna design optimization, inverse design of nanostructures and photonic metamaterials, medical imaging, electrical impedance tomography (EIT), non-destructive evaluation and remote sensing.