Browsing by Subject "Newton minimization"
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Item Open Access Electromagnetic imaging of three-dimensional dielectric objects with Newton minimization(IEEE, 2014) Etminan, Aslan; Sadeghi, Alireza; Gürel, LeventWe present a general framework for detecting the shape and electrical properties of unknown objects by using the Newton minimization approach for solving inverse-scattering problems. This procedure is performed by evolving an initial-guess object iteratively until the cost function decreases to a desired value. Rapid convergence of this method is demonstrated by some numerical results.Item Open Access Microwave imaging of three-dimensional conducting objects using the newton minimization approach(IEEE, 2013) Etminan, A.; Gürel, LeventIn this work, we present a framework to detect the shape of unknown perfect electric conducting objects by using inverse scattering and microwave imaging. The initialguess object, which evolves to achieve the target, is modeled by triangles such that vertices of the triangles are the unknowns of our problem.Item Open Access Shape reconstruction of three-dimensional conducting objects via near-field measurements(IEEE, 2014) Etminan, Aslan; Gürel, LeventA general framework for the shape reconstruction of conducting objects is presented with the Newton minimization approach. Using a fully numerical method, the initial-guess object is evolved to reconstruct the target. The object is modeled by triangles such that the vertices are the unknowns of the inverse-scattering problem. The cost function is minimized as the evolving object converges to the actual target in merely tens of iterations.