Inverse impedance boundary problem via the conformal mapping method: the case of small impedances

نویسندگان

  • F. Ben Hassen
  • Y. Boukari
  • H. Haddar
چکیده

RÉSUMÉ. Haddar and Kress [9] ont étendu l’utilisation de la méthode des applications conformes [2, 8] pour construire le bord intérieur Γi d’un domaine doublement connexe à partir de données de Cauchy sur le bord extérieur d’une fonction harmonique qui satisfait une condition homogène d’impédance sur Γi. Cependant, l’analyse de la méthode montre la non-convergence de l’algorithme proposé dans [9] dans le cas des faibles impédances. Dans ce travail, nous proposons des modifications de cet algorithme afin d’obtenir un schéma d’inversion convergent et stable dans ce cas. La méthode est ensuite validée par des exemples numériques qui incluent également le cas d’impédances variables.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Conformal Mapping Method in Inverse Obstacle Scattering

s of MMA2013 & AMOE2013, May 27–30, 2013, Tartu, Estonia c © 2013 University of Tartu A CONFORMAL MAPPING METHOD IN INVERSE OBSTACLE SCATTERING RAINER KRESS Institut für Numerische und Angewandte Mathematik, Universität Göttingen Lotzestraße 16–18, 37083 Göttingen, Germany E-mail: [email protected] In a series of papers Akduman [1], Haddar [2] and Kress [5] have employed a conformal ...

متن کامل

An inverse method for in-situ estimation of acoustic surface impedance targeting inverse sounr rendering in rooms

We propose two methods based on the inverse boundary element method (IBEM) for the estimation of acoustic impedances of the interior surfaces of a room. The algorithms take as input the geometrical model of the space, a set of sound field pressures measured at random points and the vibration strength of the sound source. A first approach is a constrained leastsquares method that attempts to fin...

متن کامل

کنترل بهینة شار حرارتی سطحی در یک جسم دوبعدی با خواص وابسته به دما

In this paper the optimal control of boundary heat flux in a 2-D solid body with an arbitrary shape is performed in order to achieve the desired temperature distribution at a given time interval. The boundary of the body is subdivided into a number of components. On each component a time-dependent heat flux is applied which is independent of the others. Since the thermophysical properties are t...

متن کامل

MIXED BOUNDARY VALUE PROBLEM FOR A QUARTER-PLANE WITH A ROBIN CONDITION

We consider a mixed boundary value problem for a quarter-plane with a Robin condition on one edge. We have developed two procedures, one based on the advanced theory of dual integral equations and the other, in our opinion simpler technique, relying on conformal mapping. Both of the procedures are of interest, because the former may be easier to adapt to other boundary value problems.

متن کامل

On Simultaneous Identification of the Shape and Generalized Impedance Boundary Condition in Obstacle Scattering

Abstract. We consider the inverse obstacle scattering problem of determining both the shape and the “equivalent impedance” from far field measurements at a fixed frequency. In this work, the surface impedance is represented by a second order surface differential operator (refer to as generalized impedance boundary condition) as opposed to a scalar function. The generalized impedance boundary co...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010