Time Domain Image Reconstruction for Homogenous Dielectric Objects by Dynamic Differential Evolution
學年 98
學期 2
出版(發表)日期 2010-05-01
作品名稱 Time Domain Image Reconstruction for Homogenous Dielectric Objects by Dynamic Differential Evolution
作品名稱(其他語言)
著者 Sun, Chi-Hsien; Chiu, Chien-Ching; Li, Ching-Lieh; Huang, Chung-Hsin
單位 淡江大學電機工程學系
出版者 Philadelphia: Taylor & Francis Inc.
著錄名稱、卷期、頁數 Electromagnetics 30(4), pp.309-323
摘要 This article presents the studies of the microwave image reconstruction of two-dimensional homogeneous dielectric cylinders that are based on the finite difference time domain method and dynamic differential evolution. For forward scattering, the finite difference time domain method is employed to calculate the scattered E-fields; for inverse scattering, the dynamic differential evolution scheme is utilized to determine the shape, location, and permittivity of the cylindrical scatterers with an arbitrary cross-section. The subgirdding technique is implemented for the finite difference time domain code in order to more smoothly model the shape of the cylinder. In addition, in order to more effectively describe an unknown cylinder with an arbitrary cross-section during the course of searching, the closed cubic-spline expansion is adopted to represent the scatterer contour instead of the frequently used trigonometric series. Numerical results demonstrate that, even when the initial guess is far from exact, good reconstruction can be obtained. In addition, the effects of Gaussian noise on the reconstruction results are investigated. Numerical results show that even the measured scattered fields are contaminated with Gaussian noise, and dynamic differential evolution is able to yield good reconstructed quality.
關鍵字 time domain inverse scattering; finite difference time domain; sub-gridding technique; dynamic differential evolution; homogenous dielectric cylinder
語言 en
ISSN 0272-6343
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度
國別 USA
公開徵稿
出版型式 紙本
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