Reconstruction of Planar Conductivities in Subdomains from Incomplete Data

Reconstruction of Planar Conductivities in Subdomains from Incomplete Data
复制标题

从不完整数据重建子域中的平面电导率

DOI:
10.1137/10079241x
复制
发表时间:
2010
期刊:
SIAM J. Appl. Math.
影响因子:
--
通讯作者:
A. Timonov
A. Timonov
中科院分区:
--
文献类型:
--
作者:
A. Nachman;A. Tamasan;A. Timonov

文献摘要

参考文献

被引文献

相似文献

我们考虑根据边界上施加的电压电势 f 产生的电流密度场 $|J|$ 大小的内部知识来恢复足够平滑的各向同性电导率的问题。在任何维度 $n\geq2$ 中,我们证明等势集是由 $|J|$ 确定的共形度量中的全局面积最小化器。在二维中,假设边界电压几乎是二比一,我们证明了最小化问题的唯一性。这会产生从不完整数据重建的两个结果。在第一种情况下,$|J|$ 在所有 $\Omega$ 中都是已知的,但几乎二比一的 f 仅在边界的子区间上是已知的。第二种情况假设 $|J|$ 仅在适当的子域 $\tilde{\Omega}$ 中已知:只要 $\tilde{\Omega}$ 包含连接边界点的整个等势曲线,我们的方法就可以工作。基于求解测地线系统的两点边值问题,我们给出了判断 $\tilde{\Omega}$ 是否满足该命题的过程...
We consider the problem of recovering a sufficiently smooth isotropic conductivity from interior knowledge of the magnitude of the current density field $|J|$ generated by an imposed voltage potential f on the boundary. In any dimension $n\geq2$, we show that equipotential sets are global area minimizers in the conformal metric determined by $|J|$. In two dimensions, assuming the boundary voltage is almost two-to-one, we prove uniqueness of the minimization problem. This yields two results on reconstruction from incomplete data. In the first case, $|J|$ is known in all of $\Omega$, but the almost two-to-one f is know only on subintervals of the boundary. The second case assumes that $|J|$ is known only in an appropriate subdomain $\tilde{\Omega}$: our method works provided that $\tilde{\Omega}$ contains entire equipotential curves joining boundary points. Based on solving two point boundary value problems for the geodesic system, we give a procedure to determine whether $\tilde{\Omega}$ satisfies this pro...
DOI: 10.1137/070686408
发表时间: 2008-06
期刊: SIAM J. Appl. Math.
影响因子: --
作者:
H. Ammari;E. Bonnetier;Yves Capdeboscq;M. Tanter;M. Fink
通讯作者: H. Ammari;E. Bonnetier;Yves Capdeboscq;M. Tanter;M. Fink
DOI: 10.1017/s0956792509007888
发表时间: 2009-06-01
影响因子: 1.9
作者:
Ammari, Habib;Capdeboscq, Yves;Kozhemyak, Anastasia
通讯作者: Kozhemyak, Anastasia