教師資料查詢 | 類別: 期刊論文 | 教師: 丘建青 Chiu Chien-ching (瀏覽個人網頁)

標題:Image and conductivity reconstruction of a variable conducting cylinder in a half-space
學年93
學期2
出版(發表)日期2005/05/01
作品名稱Image and conductivity reconstruction of a variable conducting cylinder in a half-space
作品名稱(其他語言)
著者Chien, Wei; Chiu, Chien-ching; 李慶烈; Li, Ching-lieh
單位
出版者Amsterdam: IOS Press
著錄名稱、卷期、頁數International Journal of Applied Electromagnetics and Mechanics 21(2), pp.51-62
摘要In this paper we address an inverse scattering problem whose aim is to determine the geometrical and the physical properties of a variable conducting cylindrical body buried in a half-space. The variable conductivity boundary leads to a mathematically ill-posed nonlinear equation. To overcome this difficulty, the attained system of nonlinear integral equations is reformulated into an optimization problem and solved by using the genetic algorithm. The genetic algorithm is employed to search the global extreme of the object function, such that the shape and the variable conductivity of the scatterer can be reconstructed. Even when the initial guess is far away from the exact one, the genetic algorithm can avoid the local extreme and attain to a global extreme solution sucessfully. In such a case, the gradient-based methods often get stuck in a local extreme. It is found that multiple incident waves from different directions permit good reconstruction of the shape and, to a lesser extent, the conductivity in the presence of noise for the measured data. Numerical results are given to show the effectiveness of the genetic algorithm.
關鍵字
語言英文
ISSN1383-5416
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
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