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arXiv math-ph/0111016math-phcs.NAmath.MPmath.NA
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通过稳定性指标方法的逆散射

Inverse Scattering by the Stability Index Method

S. Gutman, A. G. Ramm, W. Scheid

AI总结:

提出一种基于稳定性指标的新数值方法,用于固定能量数据的逆散射问题,通过计算数据稳定性指标判断反演稳定性并实现唯一性识别。

摘要:

提出了一种求解固定能量数据逆散射问题的新数值方法。该方法包含一个新概念:反演问题的稳定性指标。这是一个从数据计算得到的数字,显示反演的稳定程度。如果该指标很小,则反演提供一组差异很小的势,实际上可以用一个势代表这组势。如果该指标大于某个阈值,则实际上可以得出结论:给定数据下反演是不稳定的,势无法从数据中唯一确定。考虑了几个模型势函数的固定能量相移反演。结果表明了所提方法的实际效率。该方法具有普遍性,适用于非常广泛的逆问题。

英文摘要:

A novel numerical method for solving inverse scattering problem with fixed-energy data is proposed. The method contains a new important concept: the stability index of the inversion problem. This is a number, computed from the data, which shows how stable the inversion is. If this index is small, then the inversion provides a set of potentials which differ so little, that practically one can represent this set by one potential. If this index is larger than some threshold, then practically one concludes that with the given data the inversion is unstable and the potential cannot be identified uniquely from the data. Inversion of the fixed-energy phase shifts for several model potentials is considered. The results show practical efficiency of the proposed method. The method is of general nature and is applicable to a very wide variety of the inverse problems.

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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