arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.04737math.APcs.NAmath.NA
收藏

电阻抗断层成像中有限电极的唯一性和Lipschitz稳定性

Uniqueness and Lipschitz stability in Electrical Impedance Tomography with finitely many electrodes

Institute for Mathematics, Goethe-University Frankfurt(法兰克福歌德大学数学研究所)

Bastian Harrach

AI总结:

该研究扩展了线性重建问题中的唯一性结果,证明了在有限数量电极测量下,任意有限维子集中的分段解析函数导电率可唯一确定,并证明了Lipschitz稳定性,同时推导了连续模型中的类比结果。

摘要:

在电阻抗断层成像(EIT)中,针对完全电极模型(CEM)的线性化重建问题,Lechleiter和Rieder(2008 Inverse Problems 24 065009)证明了在固定划分上具有分段多项式导电率的情况下,使用足够多的电极可以唯一确定导电率。我们扩展了这一结果到非线性情况,证明在足够多的电极测量下,任意有限维子集中的分段解析函数导电率可唯一确定。我们还证明了Lipschitz稳定性,并推导了连续模型中的类比结果,其中有限数量的测量确定了边界部分上的Neumann-to-Dirichlet算子的有限维Galerkin投影。

英文摘要:

For the linearized reconstruction problem in Electrical Impedance Tomography (EIT) with the Complete Electrode Model (CEM), Lechleiter and Rieder (2008 Inverse Problems 24 065009) have shown that a piecewise polynomial conductivity on a fixed partition is uniquely determined if enough electrodes are being used. We extend their result to the full non-linear case and show that measurements on a sufficiently high number of electrodes uniquely determine a conductivity in any finite-dimensional subset of piecewise-analytic functions. We also prove Lipschitz stability, and derive analogue results for the continuum model, where finitely many measurements determine a finite-dimensional Galerkin projection of the Neumann-to-Dirichlet operator on a boundary part.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑