Zobrazeno 1 - 10
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pro vyhledávání: '"GRIESMAIER, ROLAND"'
Electromagnetic waves impinging on three-dimensional helical metallic metamaterials have been shown to exhibit chiral effects of large magnitude both theoretically and in experimental realizations. Chirality here describes different responses of scat
Externí odkaz:
http://arxiv.org/abs/2208.01391
We discuss a time-harmonic inverse scattering problem for a nonlinear Helmholtz equation with compactly supported inhomogeneous scattering objects that are described by a nonlinear refractive index in unbounded free space. Assuming the knowledge of a
Externí odkaz:
http://arxiv.org/abs/2202.05533
Autor:
Griesmaier, Roland, Raumer, Hans-Georg
Experimental aeroacoustics is concerned with the estimation of acoustic source power distributions, which are for instance caused by fluid structure interactions on scaled aircraft models inside a wind tunnel, from microphone array measurements of as
Externí odkaz:
http://arxiv.org/abs/2202.03692
We consider the scattering of time-harmonic electromagnetic waves by a penetrable thin tubular scattering object in three-dimensional free space. We establish an asymptotic representation formula for the scattered wave away from the thin tubular scat
Externí odkaz:
http://arxiv.org/abs/2010.00834
Akademický článek
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Publikováno v:
In Journal of Computational Physics 15 February 2023 475
Autor:
Griesmaier, Roland, Harrach, Bastian
Publikováno v:
SIAM J. Appl. Math. 78 (5), 2533-2557, 2018
We discuss a time-harmonic inverse scattering problem for the Helmholtz equation with compactly supported penetrable and possibly inhomogeneous scattering objects in an unbounded homogeneous background medium, and we develop a monotonicity relation f
Externí odkaz:
http://arxiv.org/abs/1802.06264
Autor:
Griesmaier, Roland, Sylvester, John
Starting with far field data of time-harmonic acoustic or electromagnetic waves radiated by a collection of compactly supported sources in two-dimensional free space, we develop criteria and algorithms for the recovery of the far field components rad
Externí odkaz:
http://arxiv.org/abs/1607.05678
We consider an inverse scattering problem for time-harmonic acoustic or electromagnetic waves. The goal is to localize several small penetrable objects embedded inside an otherwise homogeneous background medium from observations of far field patterns
Externí odkaz:
http://arxiv.org/abs/1607.04017
Autor:
Griesmaier, Roland, Hanke, Martin
(Electric) polarization tensors describe part of the leading order term of asymptotic voltage perturbations caused by low volume fraction inhomogeneities of the electrical properties of a medium. They depend on the geometry of the support of the inho
Externí odkaz:
http://arxiv.org/abs/1410.4916