We recently derived a very general representation formula for the boundary voltage perturbations caused by internal conductivity inhomogeneities of low volume fraction (cf. Capdeboscq and Vogelius (2003)). In this paper we show how this representation formula may be used to obtain very accurate estimates for the size of the inhomogeneities in terms of multiple boundary measurements. As demonstrated by our computational experiments, these estimates are significantly better than previously known (single measurement) estimates, even for moderate volume fractions.
@article{M2AN_2003__37_2_227_0, author = {Capdeboscq, Yves and Vogelius, Michael S.}, title = {Optimal asymptotic estimates for the volume of internal inhomogeneities in terms of multiple boundary measurements}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique}, volume = {37}, year = {2003}, pages = {227-240}, doi = {10.1051/m2an:2003024}, mrnumber = {1991198}, zbl = {1137.35347}, language = {en}, url = {http://dml.mathdoc.fr/item/M2AN_2003__37_2_227_0} }
Capdeboscq, Yves; Vogelius, Michael S. Optimal asymptotic estimates for the volume of internal inhomogeneities in terms of multiple boundary measurements. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 37 (2003) pp. 227-240. doi : 10.1051/m2an:2003024. http://gdmltest.u-ga.fr/item/M2AN_2003__37_2_227_0/
[1] Optimal size estimates for the inverse conductivity problem with one measurement. Proc. Amer. Math. Soc. 128 (2000) 53-64. | Zbl 0944.35108
, and ,[2] Detecting cavities by electrostatic boundary measurements. Preprint (2002). | MR 1943396 | Zbl 1010.35117
, and ,[3] A new formula for the reconstruction of conductivity inhomogeneities. Preprint (2002).
and ,[4] Boundary integral formulae for the reconstruction of electric and electromagnetic inhomogeneities of small volume. ESAIM: Cont. Opt. Calc. Var. 9 (2003) 49-66. | Numdam | Zbl 1075.78010
, and ,[5] Asymptotic formulas for steady state voltage potentials in the presence of thin inhomogeneities. A rigorous error analysis. Preprint (2002). | MR 2020923 | Zbl 1089.78003
, and ,[6] Numerical implementation of two noniterative methods for locating inclusions by impedance tomography. Inverse Problems 16 (2000) 1029-1042. | Zbl 0955.35076
and ,[7] A direct impedance tomography algorithm for locating small inhomogeneities. Numer. Math. 93 (2003) 635-654. | Zbl 1016.65079
, and ,[8] A general representation formula for boundary voltage perturbations caused by internal conductivity inhomogeneities of low volume fraction. ESAIM: M2AN 37 (2003) 159-173. | Numdam | Zbl 1137.35346
and ,[9] Identification of conductivity imperfections of small diameter by boundary measurements. Continuous dependence and computational reconstruction. Inverse Problems 14 (1998) 553-595. | Zbl 0916.35132
, and ,[10] On the uniqueness in the inverse conductivity problem with one measurement. Indiana Univ. Math. J. 38 (1989) 553-580. | Zbl 0703.35165
and ,[11] Identification of small flaws in conductors using magnetostatic measurements. Math. Comput. Simulation 50 (1999) 457-471.
and ,[12] A numerical method for finding the convex hull of polygonal cavities using the enclosure method. Inverse Problems 18 (2002) 111-124. | Zbl 0992.35118
and ,[13] The inverse conductivity problem with one measurement: stability and estimation of size. SIAM J. Math. Anal. 28 (1997) 1389-1405. | Zbl 0888.35131
, and ,[14] On bounding the effective conductivity of anisotropic composites, in Homogenization and Effective Moduli of Materials and Media, J.L. Ericksen, D. Kinderlehrer, R. Kohn and J.-L. Lions Eds., Springer-Verlag, IMA Vol. Math. Appl. 1 (1986) 97-125. | Zbl 0631.73012
and ,[15] A real time algorithm for the location search of discontinuous conductivities with one measurement. Comm. Pure Appl. Math. 55 (2002) 1-29. | Zbl 1032.78005
, and ,[16] Inequalities for electric and elastic polarization tensors with applications to random composites. J. Mech. Phys. Solids 41 (1993) 809-833. | MR 1214019 | Zbl 0797.73046
,