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This paper is concerned with inverse acoustic source problems in an unbounded domain with dynamical boundary surface data of Dirichlet kind. The measurement data are taken at a surface far away from the source support. We prove uniqueness…

偏微分方程分析 · 数学 2021-01-22 Guanghui Hu , Yavar Kian , Yue Zhao

We are concerned with time-dependent inverse source problems in elastodynamics. The source term is supposed to be the product of a spatial function and a temporal function with compact support. We present frequency-domain and time-domain…

偏微分方程分析 · 数学 2018-04-04 Gang Bao , Guanghui Hu , Yavar Kian , Tao Yin

We consider the inverse source problem of determining a source term depending on both time and space variable for fractional and classical diffusion equations in a cylindrical domain from boundary measurements. With suitable boundary…

偏微分方程分析 · 数学 2020-01-08 Yavar Kian , Masahiro Yamamoto

This paper is devoted to the inverse problem of determining the spatially dependent source in a time fractional diffusion-wave equation, with the aid of extra measurement data at subboundary. Uniqueness result is obtained by using the…

偏微分方程分析 · 数学 2021-12-08 Xing Cheng , Zhiyuan Li

This article is devoted to the analysis of inverse source problems for Stokes systems in unbounded domains where the corresponding velocity flow is observed on a surface. Our main objective is to study the unique determination of general…

偏微分方程分析 · 数学 2024-08-01 Adel Blouza , Léo Glangetas , Yavar Kian , Van-Sang Ngo

This paper is concerned with an inverse wavenumber/frequency-dependent source problem for the Helmholtz equation. In two and three dimensions, the unknown source term is supposed to be compactly supported in spatial variables but…

数值分析 · 数学 2024-04-02 Mengjie Zhao , Suliang Si , Guanghui Hu

We consider the inverse problem of determining the Lam\'{e} parameters and the density of a three-dimensional elastic body from the local time-harmonic Dirichlet-to-Neumann map. We prove uniqueness and Lipschitz stability of this inverse…

偏微分方程分析 · 数学 2014-12-12 Elena Beretta , Maarten V. de Hoop , Elisa Francini , Sergio Vessella , Jian Zhai

We consider the inverse boundary value problem of recovering piecewise homogeneous elastic tensor and piecewise homogeneous mass density from a localized lateral Dirichlet-to-Neumann or Neumann-to-Dirichlet map for the elasticity equation…

偏微分方程分析 · 数学 2019-03-05 Cătălin I. Cârstea , Gen Nakamura , Lauri Oksanen

We study the inverse problem of recovering a spatially dependent variable order in a time-fractional diffusion model from the boundary flux measurement generated by a single boundary excitation. It arises in the identification of…

偏微分方程分析 · 数学 2026-02-27 Jiho Hong , Bangti Jin , Yavar Kian

Motivated by the work of Aldroubi et al., we investigate the stability of the source term of the discrete dynamical system indexing over a non-uniform discrete set arising from spectral pairs in infinite-dimensional separable Hilbert…

泛函分析 · 数学 2026-04-13 Ruchi , Lalit Kumar Vashisht

This paper is concerned with the inverse problem of determining the time and space dependent source term of diffusion equations with constant-order time-fractional derivative in $(0,2)$. We examine two different cases. In the first one, the…

偏微分方程分析 · 数学 2021-06-28 Yavar Kian , Eric Soccorsi , Qi Xue , Masahiro Yamamoto

We discuss the identification of a time-dependent potential in a time-fractional diffusion model from a boundary measurement taken at a single point. Theoretically, we establish a conditional Lipschitz stability for this inverse problem.…

数值分析 · 数学 2024-07-23 Siyu Cen , Kwancheol Shin , Zhi Zhou

The manuscript is concerned with uniqueness and stability for inverse source problem of determining spatially varying factor $f(x)$ of a source term given by $R(t)f(x)$ with suitable given $R(t)$ in the right hand side of the Schr\"odinger…

偏微分方程分析 · 数学 2022-12-29 Oleg Imanuvilov , M. Yamamoto

We analyze the stability of an inverse problem for determining the time-dependent matrix potential appearing in the Dirichlet initial-boundary value problem for the wave equation in an unbounded cylindrical waveguide. The observation is…

偏微分方程分析 · 数学 2024-09-04 Nitesh Kumar , Tanmay Sarkar , Manmohan Vashisth

In this work we investigate the unique identifiability and stable recovery of a spatially dependent variable-order in the subdiffusion model from the boundary flux measurement. We establish several new unique identifiability results from…

偏微分方程分析 · 数学 2025-12-30 Jiho Hong , Bangti Jin , Yavar Kian

We consider a unique continuation problem for the wave equation given data in a volumetric subset of the space time domain. In the absence of data on the lateral boundary of the space-time cylinder we prove that the solution can be…

数值分析 · 数学 2025-10-24 Erik Burman , Lauri Oksanen , Janosch Preuss , Ziyao Zhao

We study the inverse source problem for a class of viscoelastic systems from a single boundary measurement in a general spatial dimension. We give specific reconstruction formula and stability estimate for the source in terms of the…

偏微分方程分析 · 数学 2020-04-24 Walton Green , Shitao Liu

This work considers the inverse dynamic source problem arising from the time-domain fluorescence diffuse optical tomography (FDOT). We recover the dynamic distributions of fluorophores in biological tissue by the one single boundary…

数值分析 · 数学 2024-05-14 Chunlong Sun , Mengmeng Zhang , Zhidong Zhang

This paper concerns the inverse source problems for the time-harmonic elastic and electromagnetic wave equations. The goal is to determine the external force and the electric current density from boundary measurements of the radiated wave…

偏微分方程分析 · 数学 2018-08-17 Gang Bao , Peijun Li , Yue Zhao

We consider an inverse boundary value problem for a semilinear wave equation on a time-dependent Lorentzian manifold with time-like boundary. The time-dependent coefficients of the nonlinear terms can be recovered in the interior from the…

偏微分方程分析 · 数学 2021-01-27 Peter Hintz , Gunther Uhlmann , Jian Zhai
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