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arXiv 2602.16906math.AP
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反问题研究:建模电解槽的准线性椭圆系统

Inverse problems for quasi-linear elliptic systems modeling electrolysers

University of Genoa(热那亚大学)

Giovanni S. Alberti, Wadim Gerner, Matteo Santacesaria

AI总结:

本文研究电解槽中电化学过程的反问题,通过耦合的准线性椭圆PDE系统,探讨如何利用边界和内部测量数据唯一重建非线性扩散系数和电势关系。

摘要:

我们研究了电解槽中电化学过程,其由耦合的二阶准线性椭圆PDE系统建模。在此背景下,我们研究一个反问题,旨在重建非线性扩散系数和定义电势的 phenomenological 关系。我们的主要结果表明,仅靠边界测量不足以重建这些非线性量。然而,我们显示,结合边界和内部测量可以实现其唯一重建。为此,我们扩展了标量准线性Calderón问题中的线性化结果,[Sun, Math. Z. 221 (1996)],到具有非局部非线性性的PDE系统中。与Calderón情况不同,广义线性化不“冻结”系数。我们显示内部测量正是实现此冻结所需,从而实现唯一重建。

英文摘要:

We investigate the electrochemical processes within an electrolyser cell, which are modelled by a coupled system of second-order quasi-linear elliptic PDEs. In this context, we study an inverse problem aiming to reconstruct both the non-linear diffusion coefficients and the phenomenological relation defining the electric potential. Our main results state that boundary measurements alone are not enough to reconstruct these non-linear quantities. However, we show that a combination of boundary and interior measurements allow for their unique reconstruction. To achieve this result we generalise a linearisation result in the context of the scalar quasi-linear Calderón problem, [Sun, Math. Z. 221 (1996)], to the setting of a system of PDEs with non-local nonlinearities. In contrast to the Calderón case, the generalised linearisation does not "freeze" the coefficients. We show that interior measurements are precisely what is required to achieve this freezing and thus enable the unique reconstruction.

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