Now showing items 31-35 of 35
A Software Framework for Finite Difference Simulation
This paper describes a software framework for solving time dependent PDEs in simple domains using finite difference (FD) methods. The framework is designed for parallel computations on distributed and shared memory computers, ...
Discrete Empirical Interpolation for Nonlinear Model Reduction
A dimension reduction method called Discrete Empirical Interpolation (DEIM) is proposed and shown to dramatically reduce the computational complexity of the popular Proper Orthogonal Decomposition (POD) method for constructing ...
Mass Lumping for Constant-Density Acoustics
Conforming Galerkin discretization of the constant-density acoustic wave equation provides optimal order convergence even in the presence of very rough coefficients, provided that the time dependence of the data (right-hand ...
A Nonlinear Differential Semblance Strategy for Waveform Inversion: Experiments in Layered Media
This paper proposes an alternative approach to the output least-squares (OLS) seismic inversion for layered-media. The latter cannot guarantee a reliable solution for either synthetic or field data, because of the existence ...
Approximate Constant Density Acoustic Inverse Scattering Using Dip-Dependent Scaling
This abstract presents a computationally efficient method to approximate the inverse of the Hessian or normal operator arising in a linearized inverse problem for constant density acoustics model of reflection seismology. ...