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arXiv 1111.5051math.AP
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由解的知识重构标量二阶椭圆型方程的系数

Reconstruction of coefficients in scalar second-order elliptic equations from knowledge of their solutions

Guillaume Bal, Gunther Uhlmann

摘要:

本文研究了有界区域上一类二阶纯量椭圆型方程的复系数的重构问题。我们表明,对于足够大的数量的解决方案和相应的边界条件的开集,所有的系数可以唯一和稳定地重建一个良好的特征规范变换。我们还表明,在某些特定的情况下,这样的解决方案等于$I_n=\frac12n(n+3)$的最小数量是足够的唯一和全球重建的未知系数。该理论在几种耦合物理医学成像模式中得到应用,包括光声断层扫描、瞬态弹性成像和磁共振弹性成像。

英文摘要:

This paper concerns the reconstruction of possibly complex-valued coefficients in a second-order scalar elliptic equation posed on a bounded domain from knowledge of several solutions of that equation. We show that for a sufficiently large number of solutions and for an open set of corresponding boundary conditions, all coefficients can be uniquely and stably reconstructed up to a well characterized gauge transformation. We also show that in some specific situations, a minimum number of such available solutions equal to $I_n=\frac12n(n+3)$ is sufficient to uniquely and globally reconstruct the unknown coefficients. This theory finds applications in several coupled-physics medical imaging modalities including photo-acoustic tomography, transient elastography, and magnetic resonance elastography.

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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