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arXiv 1110.4606math.AP
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由二维功率密度测量得到的各向异性逆扩散

Inverse anisotropic diffusion from power density measurements in two dimensions

Francois Monard, Guillaume Bal

摘要:

本文讨论了在适当的边界条件下,利用二维有界区域上椭圆型方程$\nabla \cdot γ\nabla u_i=0$的$1\leq i\leq I$解的$γ\nabla u_i\cdot\nabla u_j$与$u_i$形式的内泛函的知识,重建各向异性扩散张量$γ=(γ_{ij})_{1\leq i,j\leq 2}$.我们表明,对于I=4和适当选择的边界条件,$γ$可以唯一和稳定地重建从这样的内部泛函,这出现在耦合物理逆问题,涉及超声调制的电或光系数。显式重建程序的扩散张量,并实现数值。

英文摘要:

This paper concerns the reconstruction of an anisotropic diffusion tensor $γ=(γ_{ij})_{1\leq i,j\leq 2}$ from knowledge of internal functionals of the form $γ\nabla u_i\cdot\nabla u_j$ with $u_i$ for $1\leq i\leq I$ solutions of the elliptic equation $\nabla \cdot γ\nabla u_i=0$ on a two dimensional bounded domain with appropriate boundary conditions. We show that for I=4 and appropriately chosen boundary conditions, $γ$ may uniquely and stably be reconstructed from such internal functionals, which appear in coupled-physics inverse problems involving the ultrasound modulation of electrical or optical coefficients. Explicit reconstruction procedures for the diffusion tensor are presented and implemented numerically.

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。

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