@presentation {fang2017SINBADFpfg, title = {PDE-free Gauss-Newton Hessian for Wavefield Reconstruction Inversion}, year = {2017}, publisher = {SINBAD}, abstract = {In this work, we present a PDE-free Gauss-Newton Hessian for Wavefield Reconstruction Inversion. With this PDE-free Gauss-Newton Hessian, we can compute matrix-vector products without additional PDE solves. Thus, we are able to use the second order optimization method Gauss-Newton method with a roughly equal computational cost of first-order methods such as the gradient-descent method.}, keywords = {Presentation, SINBAD, SINBADFALL2017, SLIM}, url = {https://slim.gatech.edu/Publications/Public/Conferences/SINBAD/2017/Fall/fang2017SINBADFpfg/fang2017SINBADFpfg.pdf}, url2 = {https://slim.gatech.edu/Publications/Public/Conferences/SINBAD/2017/Fall/fang2017SINBADFpfg/fang2017SINBADFpfg.mov}, author = {Zhilong Fang and Felix J. Herrmann} }