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Nyström-discretized Magnetic Field Integral Equation for 2D Electromagnetic Scattering
(2014-05-04) [Poster]
Preconditioned Inexact Newton for Nonlinear Sparse Electromagnetic Imaging
(2014-05-04) [Poster]
Newton-type algorithms have been extensively studied in nonlinear microwave imaging due to their quadratic convergence rate and ability to recover images with high contrast values. In the past, Newton methods have been implemented in conjunction with smoothness promoting optimization/regularization schemes. However, this type of regularization schemes are known to perform poorly when applied in imagining domains with sparse content or sharp variations. In this work, an inexact Newton algorithm is formulated and implemented in conjunction with a linear sparse optimization scheme. A novel preconditioning technique is proposed to increase the convergence rate of the optimization problem. Numerical results demonstrate that the proposed framework produces sharper and more accurate images when applied in sparse/sparsified domains.
Highly Accurate Discontinuous Galerkin Method for the Maxwell Equations
(2014-05-04) [Poster]
A Novel Time Domain Method for Simulating Dissipative Electromagnetic Field Interactions
(2014-05-04) [Poster]
On the DC Loop Modes in the Solution of the Time Domain Electric Field Integral Equation
(2014-05-04) [Poster]
