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
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
A. Timonov
中科院分区:
文献类型:
--
作者:
A. Nachman;A. Tamasan;A. Timonov
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
影响因子:
1.9
作者:
Ammari, Habib;Capdeboscq, Yves;Kozhemyak, Anastasia
通讯作者:
Kozhemyak, Anastasia