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arXiv 0901.2754math.AP
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heat equation的封闭方法

The enclosure method for the heat equation

Masaru Ikehata, Mishio Kawashita

摘要:

本文将原来用于椭圆型方程的封闭方法推广到抛物型方程的反初边值问题。为此目的,考虑了一类控制方程为热传导方程的初边值反问题。给出了一种显式方法,该方法在固定的观测时间内,从侧边界上的适当热流的温度中,求出嵌入导热体中的未知间断在给定方向上的支撑函数的近似值。

英文摘要:

This paper shows how the enclosure method which was originally introduced for elliptic equations can be applied to inverse initial boundary value problems for parabolic equations. For the purpose a prototype of inverse initial boundary value problems whose governing equation is the heat equation is considered. An explicit method to extract an approximation of the value of the support function at a given direction of unknown discontinuity embedded in a heat conductive body from the temperature for a suitable heat flux on the lateral boundary for a fixed observation time is given.

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