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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/55012

    Title: Time Domain Inverse Scattering for a Homogenous Dielectric Cylinder by Asynchronous Particle Swarm Optimization
    Authors: Li, Ching-Lieh;Chiu, Chien-Ching;Huang, Chung-Hsin
    Contributors: 淡江大學電機工程學系
    Keywords: inverse scattering;time domain;FDTD;subgridding FDTD;APSO
    Date: 2011-05
    Issue Date: 2013-03-12 11:25:33 (UTC+8)
    Publisher: Conshohocken: ASTM International
    Abstract: In this paper, we propose a time domain inverse scattering technique for reconstructing the electromagnetic properties of a homogeneous dielectric cylinder based on the finite difference time domain method and the asynchronous particle swarm optimization (APSO). The homogeneous dielectric cylinder with unknown electromagnetic properties is illuminated by transverse magnetic pulse and the scattered field is recorded outside. By minimizing the discrepancy between the measured and estimated scattered field data, the location, shape, and permittivity of the dielectric cylinder are reconstructed. The inverse problem is resolved by an optimization approach and the global searching scheme APSO is then employed to search the parameter space. A set of representative numerical results is presented for demonstrating that the proposed approach is able to efficiently reconstruct the electromagnetic properties of the homogeneous dielectric scatterer even when the initial guess is far away from the exact one. In addition, the effects of Gaussian noises on imaging reconstruction are also investigated.
    Relation: Journal of Testing and Evaluation 39(3), JTE102868(7pages)
    DOI: 10.1520/JTE102868
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Journal Article

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