Reconstruction of penetrable obstacles in the anisotropic acoustic scattering

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August 2016, 10(3): 765-780. doi: 10.3934/ipi.2016020

Reconstruction of penetrable obstacles in the anisotropic acoustic scattering

1.	Department of Mathematics, National Taiwan University, Taipei 106, Taiwan

Received February 2015 Revised April 2016 Published August 2016

Abstract
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We develop an enclosure-type reconstruction scheme to identify penetrable obstacles in acoustic waves with anisotropic medium in $\mathbb{R}^{3}$. The main difficulty of treating this problem lies in the fact that there are no complex geometrical optics solutions available for the acoustic equation with anisotropic medium in $\mathbb{R}^{3}$. Instead, we will use another type of special solutions called oscillating-decaying solutions. Even though that oscillating-decaying solutions are defined only on the half space, we are able to give necessary boundary inputs by the Runge approximation property. Moreover, since we are considering a Helmholtz-type equation, we turn to Meyers' $L^{p}$ estimate to compare the integrals coming from oscillating-decaying solutions and those from reflected solutions.

Keywords: oscillating-decaying solutions, Meyers $L^{p}$ estimates., reconstruction, Enclosure method, Runge approximation property.

Mathematics Subject Classification: Primary: 35R30; Secondary: 35J1.

Citation: Yi-Hsuan Lin. Reconstruction of penetrable obstacles in the anisotropic acoustic scattering. Inverse Problems & Imaging, 2016, 10 (3) : 765-780. doi: 10.3934/ipi.2016020

References:

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[7]	V. G. Maz'ja, Sobolev Spaces,, Springer Series in Soviet Mathematics. Springer-Verlag, (1985). doi: 10.1007/978-3-662-09922-3. Google Scholar
[8]	N. G. Meyers, Lp estimate for the gradient of solutions of second order elliptic divergence equations,, Annali Della Scuola Normale Superiore Di Pisa-Classe Di Scienze, 17 (1963), 189. Google Scholar
[9]	S. Nagayasu, G. Uhlmann and J.-N. Wang, Reconstruction of penetrable obstacles in acoustic scattering,, SIAM Journal on Mathematical Analysis, 43 (2011), 189. doi: 10.1137/09076218X. Google Scholar
[10]	G. Nakamura, Applications of the oscillating-decaying solutions to inverse problems,, In New analytic and geometric methods in inverse problems, (2004), 353. Google Scholar
[11]	G. Nakamura, G. Uhlmann and J.-N. Wang, Oscillating-decaying solutions, runge approximation property for the anisotropic elasticity system and their applications to inverse problems,, Journal de mathématiques pures et appliquées, 84 (2005), 21. doi: 10.1016/j.matpur.2004.09.002. Google Scholar
[12]	M. Sini and K. Yoshida, On the reconstruction of interfaces using complex geometrical optics solutions for the acoustic case,, Inverse Problems, 28 (2012). doi: 10.1088/0266-5611/28/5/055013. Google Scholar
[13]	J. Sylvester and G. Uhlmann, A global uniqueness theorem for an inverse boundary value problem,, Annals of Mathematics, 125 (1987), 153. doi: 10.2307/1971291. Google Scholar
[14]	H. Takuwa, G. Uhlmann and J.-N. Wang, Complex geometrical optics solutions for anisotropic equations and applications,, Journal of Inverse and Ill-posed Problems, 16 (2008), 791. doi: 10.1515/JIIP.2008.049. Google Scholar
[15]	G. Uhlmann and J.-N. Wang, Reconstructing discontinuities using complex geometrical optics solutions,, SIAM Journal on Applied Mathematics, 68 (2008), 1026. doi: 10.1137/060676350. Google Scholar

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References:

[1]	L, Hörmander, The Analysis of Linear Partial Differential Operators III: Pseudo-differential Operators, volume 274., Springer Science & Business Media, (2007). Google Scholar
[2]	M. Ikehata, How to draw a picture of an unknown inclusion from boundary measurements, Two mathematical inversion algorithms,, J. Inverse Ill-Posed Probl., 7 (1999), 255. doi: 10.1515/jiip.1999.7.3.255. Google Scholar
[3]	M. Ikehata, Enclosing a polygonal cavity in a two-dimensional bounded domain from cauchy data,, Inverse Problems, 15 (1999), 1231. doi: 10.1088/0266-5611/15/5/308. Google Scholar
[4]	M. Ikehata, The enclosure method and its applications,, In Analytic extension formulas and their applications, (2001), 87. doi: 10.1007/978-1-4757-3298-6_7. Google Scholar
[5]	P. D. Lax, A stability theorem for solutions of abstract differential equations, and its application to the study of the local behavior of solutions of elliptic equations,, Communications on Pure and Applied Mathematics, 9 (1956), 747. doi: 10.1002/cpa.3160090407. Google Scholar
[6]	B. Malgrange, Existence et approximation des solutions des équations aux dérivées partielles et des équations de convolution,, In Annales de l'institut Fourier, (1956), 271. Google Scholar
[7]	V. G. Maz'ja, Sobolev Spaces,, Springer Series in Soviet Mathematics. Springer-Verlag, (1985). doi: 10.1007/978-3-662-09922-3. Google Scholar
[8]	N. G. Meyers, Lp estimate for the gradient of solutions of second order elliptic divergence equations,, Annali Della Scuola Normale Superiore Di Pisa-Classe Di Scienze, 17 (1963), 189. Google Scholar
[9]	S. Nagayasu, G. Uhlmann and J.-N. Wang, Reconstruction of penetrable obstacles in acoustic scattering,, SIAM Journal on Mathematical Analysis, 43 (2011), 189. doi: 10.1137/09076218X. Google Scholar
[10]	G. Nakamura, Applications of the oscillating-decaying solutions to inverse problems,, In New analytic and geometric methods in inverse problems, (2004), 353. Google Scholar
[11]	G. Nakamura, G. Uhlmann and J.-N. Wang, Oscillating-decaying solutions, runge approximation property for the anisotropic elasticity system and their applications to inverse problems,, Journal de mathématiques pures et appliquées, 84 (2005), 21. doi: 10.1016/j.matpur.2004.09.002. Google Scholar
[12]	M. Sini and K. Yoshida, On the reconstruction of interfaces using complex geometrical optics solutions for the acoustic case,, Inverse Problems, 28 (2012). doi: 10.1088/0266-5611/28/5/055013. Google Scholar
[13]	J. Sylvester and G. Uhlmann, A global uniqueness theorem for an inverse boundary value problem,, Annals of Mathematics, 125 (1987), 153. doi: 10.2307/1971291. Google Scholar
[14]	H. Takuwa, G. Uhlmann and J.-N. Wang, Complex geometrical optics solutions for anisotropic equations and applications,, Journal of Inverse and Ill-posed Problems, 16 (2008), 791. doi: 10.1515/JIIP.2008.049. Google Scholar
[15]	G. Uhlmann and J.-N. Wang, Reconstructing discontinuities using complex geometrical optics solutions,, SIAM Journal on Applied Mathematics, 68 (2008), 1026. doi: 10.1137/060676350. Google Scholar

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