The fixed point technique for electrophysical identification
نویسنده
چکیده
The shape of an inaccessible boundary between two different media is identified by applying a dc field. The electric potential is described by Fredholm’s integral equation of the first kind. Numerical processing leads to a system of nonlinear and ill-conditioned algebraic equations. Their solution causes numerical problems. A new algorithm based on the Brouwer’s fixed point theorem is proposed as a solution. Résumé. Le champ de courant continu identifie la forme d’une frontière inaccessible au milieu de deux matériaux avec des caractéristiques électrophysiques différentes. La distribution de potentiel électrique est décrite par des équations intégrales de Fredholm. Le traitement numérique des équations conduit à un système d’équations algébriques mal-conditionnées difficile à résoudre numériquement. Dans notre article, pour définir une solution, nous avons appliqué le théorème de Brouwer (théorème de point fixe). PACS. 02.70.Rw Other computational methods
منابع مشابه
A solution of nonlinear fractional random differential equation via random fixed point technique
In this paper, we investigate a new type of random $F$-contraction and obtain a common random fixed point theorem for a pair of self stochastic mappings in a separable Banach space. The existence of a unique solution for nonlinear fractional random differential equation is proved under suitable conditions.
متن کاملIdentification of bester hybrids (female Huso huso Linnaeus, 1758 and male sterlet Acipenser ruthenus Linnaeus, 1758) using AFLP molecular technique
In this study Amplified Fragment Length Polymorphism (AFLP) was applied to species identification of bester hybrids. Hybrids identification was performed by comparison of electrophoresis profiles with parental species. The simultaneous occurrence of diagnostic bands fixed in the parental species, genetic distance and identification and cluster analyses (UPGMA) allow a correct identification. ...
متن کاملExistence of solutions of infinite systems of integral equations in the Frechet spaces
In this paper we apply the technique of measures of noncompactness to the theory of infinite system of integral equations in the Fr´echet spaces. Our aim is to provide a few generalization of Tychonoff fixed point theorem and prove the existence of solutions for infinite systems of nonlinear integral equations with help of the technique of measures of noncompactness and a generalization of Tych...
متن کاملImpulsive integrodifferential Equations and Measure of noncompactness
This paper is concerned with the existence of mild solutions for impulsive integro-differential equations with nonlocal conditions. We apply the technique measure of noncompactness in the space of piecewise continuous functions and by using Darbo-Sadovskii's fixed point theorem, we prove reasults about impulsive integro-differential equations for convex-power condensing operators.
متن کاملExtended RetroauricularTemporal Flap with Conchal Cartilage for Alar or Columellar Reconstruction
Abstract Background: The retroauricular-temporal or Washio flap has been introduced for reconstruction of partial nose and cheek defects, and has many advantages. We decided to evaluate the extended use of this technique in order to repair full thickness nasal defects. Methods: Superficial temporal and retroauricular arteries are identified with Doppler flowmetry. Selection points A, B, C and ...
متن کامل