Omar Ghattas - Publications

Affiliations: 
Carnegie Mellon University, Pittsburgh, PA 
Area:
Applied Mechanics, Computer Science, Mathematics

65 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2019 Chen P, Villa U, Ghattas O. Taylor approximation and variance reduction for PDE-constrained optimal control under uncertainty Journal of Computational Physics. 385: 163-186. DOI: 10.1016/J.Jcp.2019.01.047  0.373
2018 Wang K, Bui-Thanh T, Ghattas O. A Randomized Maximum A Posteriori Method for Posterior Sampling of High Dimensional Nonlinear Bayesian Inverse Problems Siam Journal On Scientific Computing. 40: A142-A171. DOI: 10.1137/16M1060625  0.471
2018 Crestel B, Stadler G, Ghattas O. A comparative study of structural similarity and regularization for joint inverse problems governed by PDEs Inverse Problems. 35: 024003. DOI: 10.1088/1361-6420/Aaf129  0.37
2017 Rudi J, Stadler G, Ghattas O. Weighted BFBT Preconditioner for Stokes Flow Problems with Highly Heterogeneous Viscosity Siam Journal On Scientific Computing. 39: S272-S297. DOI: 10.1137/16M108450X  0.389
2017 Alger N, Villa U, Bui-Thanh T, Ghattas O. A Data Scalable Augmented Lagrangian KKT Preconditioner for Large-Scale Inverse Problems Siam Journal On Scientific Computing. 39: A2365-A2393. DOI: 10.1137/16M1084365  0.353
2017 Alexanderian A, Petra N, Stadler G, Ghattas O. Mean-Variance Risk-Averse Optimal Control of Systems Governed by PDEs with Random Parameter Fields Using Quadratic Approximations Siam/Asa Journal On Uncertainty Quantification. 5: 1166-1192. DOI: 10.1137/16M106306X  0.401
2017 Crestel B, Alexanderian A, Stadler G, Ghattas O. A-optimal encoding weights for nonlinear inverse problems, with application to the Helmholtz inverse problem Inverse Problems. 33: 074008. DOI: 10.1088/1361-6420/Aa6D8E  0.465
2017 Chen P, Villa U, Ghattas O. Hessian-based adaptive sparse quadrature for infinite-dimensional Bayesian inverse problems Computer Methods in Applied Mechanics and Engineering. 327: 147-172. DOI: 10.1016/J.Cma.2017.08.016  0.373
2016 Zhu H, Petra N, Stadler G, Isaac T, Hughes TJR, Ghattas O. Inversion of geothermal heat flux in a thermomechanically coupled nonlinear Stokes ice sheet model Cryosphere. 10: 1477-1494. DOI: 10.5194/Tc-10-1477-2016  0.422
2016 Alexanderian A, Gloor PJ, Ghattas O. On Bayesian A- and D-optimal experimental designs in infinite dimensions Bayesian Analysis. 11: 671-695. DOI: 10.1214/15-Ba969  0.369
2016 Zhu H, Li S, Fomel S, Stadler G, Ghattas O. A Bayesian approach to estimate uncertainty for full-waveform inversion using a priori information from depth migration Geophysics. 81: R307-R323. DOI: 10.1190/Geo2015-0641.1  0.647
2015 Bui-Thanh T, Ghattas O. A scalable algorithm for map estimators in Bayesian inverse problems with Besov priors Inverse Problems and Imaging. 9: 27-53. DOI: 10.3934/Ipi.2015.9.27  0.474
2015 Zhu H, Li S, Fomel S, Stadler G, Ghattas O. Uncertainty estimation for full waveform inversion with a prior information from depth migration Seg Technical Program Expanded Abstracts. 34: 1409-1414. DOI: 10.1190/Segam2015-5834647.1  0.64
2015 Rudi J, Malossi ACI, Isaac T, Stadler G, Gurnis M, Staar PWJ, Ineichen Y, Bekas C, Curioni A, Ghattas O. An extreme-scale implicit solver for complex PDEs: Highly heterogeneous flow in earth's mantle International Conference For High Performance Computing, Networking, Storage and Analysis, Sc. 15. DOI: 10.1145/2807591.2807675  0.305
2015 Isaac T, Petra N, Stadler G, Ghattas O. Scalable and efficient algorithms for the propagation of uncertainty from data through inference to prediction for large-scale problems, with application to flow of the Antarctic ice sheet Journal of Computational Physics. 296: 348-368. DOI: 10.1016/J.Jcp.2015.04.047  0.394
2015 Wilcox LC, Stadler G, Bui-Thanh T, Ghattas O. Discretely Exact Derivatives for Hyperbolic PDE-Constrained Optimization Problems Discretized by the Discontinuous Galerkin Method Journal of Scientific Computing. 63: 138-162. DOI: 10.1007/S10915-014-9890-5  0.353
2014 Petra N, Martin J, Stadler G, Ghattas O. A Computational Framework for Infinite-Dimensional Bayesian Inverse Problems, Part II: Stochastic Newton MCMC with Application to Ice Sheet Flow Inverse Problems Siam Journal On Scientific Computing. 36: A1525-A1555. DOI: 10.1137/130934805  0.449
2014 Alexanderian A, Petra N, Stadler G, Ghattas O. A-Optimal design of experiments for infinite-dimensional Bayesian linear inverse problems with regularized l0-Sparsification Siam Journal On Scientific Computing. 36: A2122-A2148. DOI: 10.1137/130933381  0.381
2014 Bui-Thanh T, Ghattas O. An Analysis of Infinite Dimensional Bayesian Inverse Shape Acoustic Scattering and Its Numerical Approximation Siam/Asa Journal On Uncertainty Quantification. 2: 203-222. DOI: 10.1137/120894877  0.433
2014 Worthen J, Stadler G, Petra N, Gurnis M, Ghattas O. Towards adjoint-based inversion for rheological parameters in nonlinear viscous mantle flow Physics of the Earth and Planetary Interiors. 234: 23-34. DOI: 10.1016/J.Pepi.2014.06.006  0.376
2014 Bui-Thanh T, Ghattas O. A PDE-constrained optimization approach to the discontinuous Petrov-Galerkin method with a trust region inexact Newton-CG solver Computer Methods in Applied Mechanics and Engineering. 278: 20-40. DOI: 10.1016/J.Cma.2014.04.018  0.448
2013 Bui-Thanh T, Ghattas O. Analysis of the Hessian for inverse scattering problems. Part III: Inverse medium scattering of electromagnetic waves in three dimensions Inverse Problems and Imaging. 7: 1139-1155. DOI: 10.3934/Ipi.2013.7.1139  0.431
2013 Bui-Thanh T, Ghattas O, Martin J, Stadler G. A computational framework for infinite-dimensional bayesian inverse problems part I: The linearized case, with application to global seismic inversion Siam Journal On Scientific Computing. 35. DOI: 10.1137/12089586X  0.488
2013 Bui-Thanh T, Demkowicz L, Ghattas O. A unified discontinuous Petrov-Galerkin method and its analysis for Friedrichs' systems Siam Journal On Numerical Analysis. 51: 1933-1958. DOI: 10.1137/110854369  0.361
2013 Bui-Thanh T, Demkowicz L, Ghattas O. Constructively well-posed approximation methods with unity inf-sup and continuity constants for partial differential equations Mathematics of Computation. 82: 1923-1952. DOI: 10.1090/S0025-5718-2013-02697-X  0.361
2012 Petra N, Zhu H, Stadler G, Hughes TJR, Ghattas O. An inexact Gauss-Newton method for inversion of basal sliding and rheology parameters in a nonlinear Stokes ice sheet model Journal of Glaciology. 58: 889-903. DOI: 10.3189/2012Jog11J182  0.33
2012 Bui-Thanh T, Ghattas O, Higdon D. Adaptive hessian-based nonstationary gaussian process response surface method for probability density approximation with application to bayesian solution of large-scale inverse problems Siam Journal On Scientific Computing. 34. DOI: 10.1137/110851419  0.395
2012 Martin J, Wilcox LC, Burstedde C, Ghattas O. A Stochastic Newton MCMC Method for Large-Scale Statistical Inverse Problems with Application to Seismic Inversion Siam Journal On Scientific Computing. 34: A1460-A1487. DOI: 10.1137/110845598  0.454
2012 Bui-Thanh T, Ghattas O. Analysis of an hp-nonconforming discontinuous galerkin spectral element method for wave propagation Siam Journal On Numerical Analysis. 50: 1801-1826. DOI: 10.1137/110828010  0.38
2012 Sundar H, Biros G, Burstedde C, Rudi J, Ghattas O, Stadler G. Parallel geometric-algebraic multigrid on unstructured forests of octrees International Conference For High Performance Computing, Networking, Storage and Analysis, Sc. DOI: 10.1109/SC.2012.91  0.486
2012 Tan BT, Ghattas O. Analysis of the Hessian for inverse scattering problems: II. Inverse medium scattering of acoustic waves Inverse Problems. 28. DOI: 10.1088/0266-5611/28/5/055001  0.416
2012 Allaire D, Biros G, Chambers J, Ghattas O, Kordonowy D, Willcox K. Dynamic data driven methods for self-aware aerospace vehicles Procedia Computer Science. 9: 1206-1210. DOI: 10.1016/j.procs.2012.04.130  0.533
2011 Yang S, Stadler G, Moser R, Ghattas O. A shape hessian-based boundary roughness analysis of navier-stokes flow Siam Journal On Applied Mathematics. 71: 333-355. DOI: 10.1137/100796789  0.32
2011 Flath HP, Wilcox LC, AkçElik V, Hill J, Van Bloemen Waanders B, Ghattas O. Fast algorithms for bayesian uncertainty quantification in large-scale linear inverse problems based on low-rank partial hessian approximations Siam Journal On Scientific Computing. 33: 407-432. DOI: 10.1137/090780717  0.622
2010 Lieberman C, Willcox K, Ghattas O. Parameter and state model reduction for large-scale statistical inverse problems Siam Journal On Scientific Computing. 32: 2523-2542. DOI: 10.1137/090775622  0.44
2010 Wilcox LC, Stadler G, Burstedde C, Ghattas O. A high-order discontinuous Galerkin method for wave propagation through coupled elastic-acoustic media Journal of Computational Physics. 229: 9373-9396. DOI: 10.1016/J.Jcp.2010.09.008  0.397
2010 Askan A, Akcelik V, Bielak J, Ghattas O. Parameter sensitivity analysis of a nonlinear least-squares optimization-based anelastic full waveform inversion method Comptes Rendus - Mecanique. 338: 364-376. DOI: 10.1016/J.Crme.2010.07.002  0.762
2010 Galbally D, Fidkowski K, Willcox K, Ghattas O. Non-linear model reduction for uncertainty quantification in large-scale inverse problems International Journal For Numerical Methods in Engineering. 81: 1581-1608. DOI: 10.1002/Nme.2746  0.374
2010 Biegler L, Biros G, Ghattas O, Heinkenschloss M, Keyes D, Mallick B, Marzouk Y, Tenorio L, van Bloemen Waanders B, Willcox K. Large-Scale Inverse Problems and Quantification of Uncertainty Large-Scale Inverse Problems and Quantification of Uncertainty. DOI: 10.1002/9780470685853  0.583
2009 Burstedde C, Ghattas O. Algorithmic strategies for full waveform inversion: 1D experiments Geophysics. 74. DOI: 10.1190/1.3237116  0.382
2009 Burstedde C, Ghattas O, Stadler G, Tu T, Wilcox LC. Parallel scalable adjoint-based adaptive solution of variable-viscosity Stokes flow problems Computer Methods in Applied Mechanics and Engineering. 198: 1691-1700. DOI: 10.1016/J.Cma.2008.12.015  0.317
2008 Bui-Thanh T, Willcox K, Ghattas O. Model reduction for large-scale systems with high-dimensional parametric input space Siam Journal On Scientific Computing. 30: 3270-3288. DOI: 10.1137/070694855  0.391
2008 Epanomeritakis I, Akçelik V, Ghattas O, Bielak J. A Newton-CG method for large-scale three-dimensional elastic full-waveform seismic inversion Inverse Problems. 24. DOI: 10.1088/0266-5611/24/3/034015  0.386
2008 Tenorio L, Haber E, Symes WW, Stark PB, Cox D, Ghattas O. Guest Editors' introduction to the special section on statistical and computational issues in inverse problems Inverse Problems. 24. DOI: 10.1088/0266-5611/24/3/034001  0.303
2008 Bashir O, Willcox K, Ghattas O, van Bloemen Waanders B, Hill J. Hessian-based model reduction for large-scale systems with initial-condition inputs International Journal For Numerical Methods in Engineering. 73: 844-868. DOI: 10.1002/Nme.2100  0.615
2007 Bui-Thanh T, Willcox K, Ghattas O. Parametric reduced-order models for probabilistic analysis of unsteady aerodynamic applications Collection of Technical Papers - Aiaa/Asme/Asce/Ahs/Asc Structures, Structural Dynamics and Materials Conference. 4: 4235-4249. DOI: 10.2514/1.35850  0.436
2007 Askan A, Akcelik V, Bielak J, Ghattas O. Full waveform inversion for seismic velocity and anelastic losses in heterogeneous structures Bulletin of the Seismological Society of America. 97: 1990-2008. DOI: 10.1785/0120070079  0.761
2007 Lee LQ, Akcelik V, Chen S, Ge L, Prudencio E, Schussman G, Uplenchwar R, Ng C, Ko K, Luo X, Shephard M, Ng E, Li X, Yang C, Husbands P, ... ... Ghattas O, et al. Enabling technologies for petascale electromagnetic accelerator simulation Journal of Physics: Conference Series. 78. DOI: 10.1088/1742-6596/78/1/012040  0.688
2007 Bui-Thanh T, Willcox K, Ghattas O, van Bloemen Waanders B. Goal-oriented, model-constrained optimization for reduction of large-scale systems Journal of Computational Physics. 224: 880-896. DOI: 10.1016/J.Jcp.2006.10.026  0.402
2007 Akcelik V, Biros G, Ghattas O. Minisymposium 1: Domain Decomposition Methods for Simulation-constrained Optimization Lecture Notes in Computational Science and Engineering. 55: 153.  0.758
2006 Biros G, Ghattas O. Parallel Lagrange-Newton-Krylov-Schur methods for PDE-constrained optimization. Part II: The Lagrange-Newton solver and its application to optimal control of steady viscous flows Siam Journal On Scientific Computing. 27: 714-739. DOI: 10.1137/S1064827502415661  0.671
2006 Biros G, Ghattas O. Parallel Lagrange-Newton-Krylov-Schur methods for PDE-constrained optimization. Part I: The Krylov-Schur solver Siam Journal On Scientific Computing. 27: 687-713. DOI: 10.1137/S106482750241565X  0.671
2006 Akcelik V, Biros G, Draganescu A, Ghattas O, Hill J, Van Bloemen Waanders B. Inversion of airborne contaminants in a regional model Lecture Notes in Computer Science (Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 3993: 481-488. DOI: 10.1007/11758532_64  0.715
2005 Akçelik V, Biros G, Ghattas O, Keyes D, Ko K, Lee LQ, Ng EG. Adjoint methods for electromagnetic shape optimization of the low-loss cavity for the international linear collider Journal of Physics: Conference Series. 16: 435-445. DOI: 10.1088/1742-6596/16/1/059  0.618
2004 Akçelik V, Bielak J, Biros G, Epanomeritakis I, Ghattas O, Kallivokas LF, Kim EJ. A framework for online inversion-based 3D site characterization Lecture Notes in Computer Science (Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 3038: 717-724.  0.54
2003 Akçelik V, Bielak J, Biros G, Epanomeritakis I, Fernández A, Ghattas O, Kim EJ, López J, O'Hallaron D, Tu T, Urbanic J. High resolution forward and inverse earthquake modeling on terascale computers Proceedings of the 2003 Acm/Ieee Conference On Supercomputing, Sc 2003. DOI: 10.1145/1048935.1050202  0.602
2003 Akçelik V, Biros G, Ghattas O, Long KR, Van Bloemen Waanders B. A variational finite element method for source inversion for convective-diffusive transport Finite Elements in Analysis and Design. 39: 683-705. DOI: 10.1016/S0168-874X(03)00054-4  0.748
2002 Malcevic I, Ghattas O. Dynamic-mesh finite element method for Lagrangian computational fluid dynamics Finite Elements in Analysis and Design. 38: 965-982. DOI: 10.1016/S0168-874X(02)00088-4  0.335
2001 Akcelik V, Jaramaz B, Ghattas O. Nearly Orthogonal Two-Dimensional Grid Generation with Aspect Ratio Control Journal of Computational Physics. 171: 805-821. DOI: 10.1006/Jcph.2001.6811  0.742
1998 Ghattas O, Li X. Domain decomposition methods for sensitivity analysis of a nonlinear aeroelasticity problem International Journal of Computational Fluid Dynamics. 11: 113-130. DOI: 10.1080/10618569808940868  0.393
1998 Bao H, Bielak J, Ghattas O, Kallivokas LF, O'Hallaron DR, Shewchuk JR, Xu J. Large-scale simulation of elastic wave propagation in heterogeneous media on parallel computers Computer Methods in Applied Mechanics and Engineering. 152: 85-102.  0.335
1997 Ghattas O, Bark JH. Optimal control of two- and three-dimensional incompressible Navier-Stokes flows Journal of Computational Physics. 136: 231-244. DOI: 10.1006/Jcph.1997.5744  0.39
1996 Orozco CE, Ghattas ON. Infeasible path optimal design methods with applications to aerodynamic shape optimization Aiaa Journal. 34: 217-224.  0.347
1995 Ghattas O, Li X. A variational finite element method for stationary nonlinear fluid-solid interaction Journal of Computational Physics. 121: 347-356. DOI: 10.1016/S0021-9991(95)90204-X  0.406
1992 Orozco CE, Ghattas ON. Massively parallel aerodynamic shape optimization Computing Systems in Engineering. 3: 311-320. DOI: 10.1016/0956-0521(92)90116-Z  0.384
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