教師資料查詢 | 類別: 期刊論文 | 教師: 李慶烈 Li Ching-lieh (瀏覽個人網頁)

標題:Image Reconstruction of the Buried Metallic Cylinder Using FDTD Method and SSGA
學年96
學期1
出版(發表)日期2008/01/01
作品名稱Image Reconstruction of the Buried Metallic Cylinder Using FDTD Method and SSGA
作品名稱(其他語言)
著者Sun, C. H.; Chiu, C. C.; Lin, C. J.
單位淡江大學電機工程學系
出版者Cambridge: Electromagnetics Academy
著錄名稱、卷期、頁數Progress in Electromagnetics Research 85, pp.195-210
摘要This paper presents an image reconstruction approach based on the time-domain and steady state genetic algorithm (SSGA) for a 2-D perfectly conducting cylinder buried in a half-space. The computational method combines the finite difference time domain (FDTD) method and the steady state genetic algorithms (SSGA) to determine the shape and location of the subsurface scatterer with arbitrary cross section. The subgirdding technique is implemented in the FDTD code for modeling the shape of the cylinder more closely. In order to describe an unknown 2-D cylinder with arbitrary cross section more effectively, the shape function is expanded by closed cubic-spline function instead of frequently used trigonometric series. The inverse problem is reformulatedin to an optimization problem and the global searching scheme SSGA with closedcubic-spline is then employed to search the parameter space. Numerical results show that the shadowing effect for the inverse problem in a half space results in poor image reconstruction on the backside of the cylinder. We propose the two-step strategy to overcome the shadowing effect. It is found that goodimaging quality could be attainedbasedon the proposed strategy.
關鍵字Algorithms;Computational methods;Cylinders (shapes);Diesel engines;Finite difference time domain method;Fourier series;Function evaluation;Genetic algorithms;Global optimization;Image processing;Image reconstruction;Inverse problems;Probability density function;Repair;Restoration;Splines;Arbitrary cross sections;Do-mains;FDTD codes;FDTD methods;Finite difference time domains;Global searching;Half spaces;Imaging qualities;Metallic cylinders;Numerical results;Optimization problems;Parameter spaces;Perfectly conducting cylinders;Shadowing effects;Shape functions;Spline functions;Steady states;Trigonometric series;Time domain analysis
語言英文
ISSN1070-4698
期刊性質國外
收錄於EI
產學合作
通訊作者
審稿制度
國別英國
公開徵稿
出版型式紙本
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