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Träfflista för sökning "LAR1:lu ;pers:(Kristensson Gerhard)"

Sökning: LAR1:lu > Kristensson Gerhard

  • Resultat 61-70 av 268
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61.
  • Gustavsson, Magnus, et al. (författare)
  • Multiple scattering by a collection of randomly located obstacles - numerical implementation of the coherent fields
  • 2016
  • Ingår i: Journal of Quantitative Spectroscopy & Radiative Transfer. - : Elsevier BV. - 0022-4073. ; 185, s. 95-100
  • Tidskriftsartikel (refereegranskat)abstract
    • A numerical implementation of a method to analyze scattering by randomly located obstacles in a slab geometry is presented. In general, the obstacles can be of arbitrary shape, but, in this first implementation, the obstacles are dielectric spheres. The coherent part of the reflected and transmitted intensity at normal incidence is treated. Excellent agreement with numerical results found in the literature of the effective wave number is obtained. Moreover, comparisons with the results of the Bouguer–Beer (B–B) law are made. The present theory also gives a small reflected coherent field, which is not predicted by the Bouguer–Beer law, and these results are discussed in some detail.
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62.
  • Gustavsson, Magnus, et al. (författare)
  • Multiple scattering by a collection of randomly located obstacles Part II: Numerical implementation - coherent fields
  • 2014
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • A numerical implementation of a rigorous theory to analyze scattering by randomly located obstacles is presented. In general, the obstacles can be of quite arbitrary shape, but, in this first implementation, the obstacles are dielectric spheres. The coherent part of the reflected and transmitted intensity at normal incidence is treated. Excellent agreement with numerical results found in the literature of the effective wave number is obtained. Moreover, comparisons with the results of the Radiative Transfer Equation (RTE) are made. The present theory also gives a small reflected coherent field, which is not predicted by the RTE, and these results are discussed in some detail.
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63.
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67.
  • Ioannidis, Andreas, et al. (författare)
  • On the dispersion equation for a homogeneous, bi-isotropic waveguide of arbitrary cross-section
  • 2009
  • Ingår i: Microwave and Optical Technology Letters. - : Wiley. - 0895-2477 .- 1098-2760. ; 51:11, s. 2701-2705
  • Tidskriftsartikel (refereegranskat)abstract
    • In this article, we consider the propagation problem inside a waveguide filled with a homogeneous bi-isotropic material. The cross section of the waveguide is assumed arbitrary. By using the classical theory for the 2D Helmholtz equation in the cross section and the null-field approach, we obtain the dispersion equation in an implicit form. The final equation is a potential candidate for the solution of the direct and the inverse propagation problems.
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68.
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69.
  • Ioannidis, Andreas, et al. (författare)
  • On the Well-Posedness of the Maxwell System for Linear Bianisotropic Media
  • 2012
  • Ingår i: SIAM Journal on Mathematical Analysis. - : Society for Industrial & Applied Mathematics (SIAM). - 0036-1410 .- 1095-7154. ; 44:4, s. 2459-2473
  • Tidskriftsartikel (refereegranskat)abstract
    • The time-dependent Maxwell system is supplemented with the constitutive relations of linear bianisotropic media and is treated as a neutral integro-differential equation in a Hilbert space. By using the theory of abstract Volterra equations and strongly continuous semigroups we obtain general well-posedness results for the corresponding mathematical problem.
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70.
  • Ioannidis, Andreas, et al. (författare)
  • On the well-posedness of the Maxwell system for linear bianisotropic media
  • 2010
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The time dependent Maxwell system is supplemented with the constitutive relations of linear bianisotropc media and is treated as a neutral integro-differential equation in a Hilbert space. By using the theory of abstract Volterra equations and strongly continuous semigroups we obtain general well-posedness results for the corresponding mathematical problem.
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