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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/46293


    Title: Electromagnetic imaging for an imperfectly conducting cylinder buried in a three-layer structure by the genetic algorithm
    Authors: Lee, Y. S.;Chiu, Chien-ching;Lin, Y. S.
    Contributors: 淡江大學電機工程學系
    Date: 2004
    Issue Date: 2010-03-26 21:56:15 (UTC+8)
    Publisher: Cambridge, MA: Electromagnetics Academy
    Abstract: The imaging of an imperfectly conducting cylinder buried in a three-layer structure by the genetic algorithm is investigated. An imperfectly conducting cylinder of unknown shape and conductivity buriedin the secondla yer scatters the incident wave from the first layer or the thirdla yer. We measure the scatteredfieldin the first andthird layers. Based on the boundary condition and the recorded scattered field, a set of nonlinear integral equations is derived and the imaging problem is reformulatedin to an optimization problem. The genetic algorithm is then employedto findout the global extreme solution of the cost function. Numerical results demonstrated that, even when the initial guess is far away from the exact one, goodreconstruction can be obtained. In such a case, the gradient-based methods often get trapped in a local extreme. In addition, the effect of uniform noise on the reconstruction is investigated.
    Relation: Progress In Electromagnetics Research 48, pp.27-44
    DOI: 10.2528/PIER03120304
    Appears in Collections:[電機工程學系暨研究所] 期刊論文

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