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Erschienen in: Journal of Scientific Computing 3/2021

01.06.2021

The Quasi-reversibility Method to Numerically Solve an Inverse Source Problem for Hyperbolic Equations

verfasst von: Thuy T. Le, Loc H. Nguyen, Thi-Phong Nguyen, William Powell

Erschienen in: Journal of Scientific Computing | Ausgabe 3/2021

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Abstract

We propose a numerical method to solve an inverse source problem of computing the initial condition of hyperbolic equations from the measurements of Cauchy data. This problem arises in thermo- and photo-acoustic tomography in a bounded cavity, in which the reflection of the wave makes the widely-used approaches, such as the time reversal method, not applicable. In order to solve this inverse source problem, we approximate the solution to the hyperbolic equation by its Fourier series with respect to a special orthonormal basis of \(L^2\). Then, we derive a coupled system of elliptic equations for the corresponding Fourier coefficients. We solve it by the quasi-reversibility method. The desired initial condition follows. We rigorously prove the convergence of the quasi-reversibility method as the noise level tends to 0. Some numerical examples are provided. In addition, we numerically prove that the use of the special basic above is significant.

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Metadaten
Titel
The Quasi-reversibility Method to Numerically Solve an Inverse Source Problem for Hyperbolic Equations
verfasst von
Thuy T. Le
Loc H. Nguyen
Thi-Phong Nguyen
William Powell
Publikationsdatum
01.06.2021
Verlag
Springer US
Erschienen in
Journal of Scientific Computing / Ausgabe 3/2021
Print ISSN: 0885-7474
Elektronische ISSN: 1573-7691
DOI
https://doi.org/10.1007/s10915-021-01501-3

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