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arXiv 2005.14398physics.geo-phstat.CO
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蒙特卡罗模拟器

Informed Proposal Monte Carlo

Sarouyeh Khoshkholgh, Andrea Zunino, Klaus Mosegaard

摘要:

任何求解反问题的搜索或采样算法都需要指导才能有效。许多算法都是动态地收集和应用关于问题的信息,并且在这方面已经取得了很大的改进。然而,作为没有免费午餐定理的结果,我们可以确保搜索和采样算法的性能显着提高的唯一方法是尽可能多地构建有关问题的信息。在特殊情况下的马尔可夫链蒙特卡罗抽样(MCMC),我们审查如何做到这一点,通过选择的建议分布,我们展示了这种方式添加更多的信息的问题时,可以特别有效的近似物理模型的问题。一个高度非线性的逆散射问题与高维模型空间作为一个例子,通过这种方法的效率增益。

英文摘要:

Any search or sampling algorithm for solution of inverse problems needs guidance to be efficient. Many algorithms collect and apply information about the problem on the fly, and much improvement has been made in this way. However, as a consequence of the the No-Free-Lunch Theorem, the only way we can ensure a significantly better performance of search and sampling algorithms is to build in as much information about the problem as possible. In the special case of Markov Chain Monte Carlo sampling (MCMC) we review how this is done through the choice of proposal distribution, and we show how this way of adding more information about the problem can be made particularly efficient when based on an approximate physics model of the problem. A highly nonlinear inverse scattering problem with a high-dimensional model space serves as an illustration of the gain of efficiency through this approach.

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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