arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2406.16627math.NAcs.NA
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高维函数空间中的随机积分算法

A Random Integration Algorithm for High-dimensional Function Spaces

Jiujiang University(九江学院);Zhejiang University of Technology(浙江工业大学);Sun Yat-sen University(中山大学)

Liang Chen, Minqiang Xu, Haizhang Zhang

AI总结:

本文提出了一种高维函数空间中具有高收敛阶和多项式可处理性的随机积分算法,适用于稀疏频率或快速衰减傅里叶系数的函数,并通过数值实验验证了其有效性。

摘要:

我们介绍了一种新颖的随机积分算法,该算法在收敛阶和多项式可处理性方面表现出色,适用于具有稀疏频率或快速衰减傅里叶系数的函数。具体而言,在周期性各向同性Sobolev空间和具有紧支集的各向同性Sobolev空间中,我们的方法达到了几乎最优的均方误差(RMSE)界。与之前的几乎最优算法不同,我们的方法具有多项式可处理性,确保样本数量不随维度增加而指数级增长。我们的积分算法还为加权Korobov空间提供了几乎最优的界。此外,该算法无需事先知道权重,这与组件对组件算法不同。在Wiener代数中,我们的算法的样本复杂度与傅里叶系数的衰减率无关。通过数值实验验证了该积分的有效性。

英文摘要:

We introduce a novel random integration algorithm that boasts both high convergence order and polynomial tractability for functions characterized by sparse frequencies or rapidly decaying Fourier coefficients. Specifically, for integration in periodic isotropic Sobolev space and the isotropic Sobolev space with compact support, our approach attains a nearly optimal root mean square error (RMSE) bound. In contrast to previous nearly optimal algorithms, our method exhibits polynomial tractability, ensuring that the number of samples does not scale exponentially with increasing dimensions. Our integration algorithm also enjoys nearly optimal bound for weighted Korobov space. Furthermore, the algorithm can be applied without the need for prior knowledge of weights, distinguishing it from the component-by-component algorithm. For integration in the Wiener algebra, the sample complexity of our algorithm is independent of the decay rate of Fourier coefficients. The effectiveness of the integration is confirmed through numerical experiments.

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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