arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.00891math.PRcs.LGmath.FAstat.ML
收藏

平稳过程的核自协方差算子:估计与收敛性

Kernel Autocovariance Operators of Stationary Processes: Estimation and Convergence

Freie Universität Berlin(柏林自由大学);Heriot–Watt University(赫瑞瓦特大学);Zuse Intitute Berlin(柏林祖斯研究所)

Mattes Mollenhauer, Stefan Klus, Christof Schütte, Péter Koltai

AI总结:

本文研究再生核希尔伯特空间中平稳过程自协方差算子的经验估计收敛性,在遍历和强混合条件下给出渐近结果与有限样本误差界,并应用于核主成分分析、条件均值嵌入及马尔可夫转移算子的非参数估计。

摘要:

我们考虑嵌入到再生核希尔伯特空间中的波兰空间上平稳随机过程的自协方差算子。我们研究了这些算子的经验估计在过程实现上于各种条件下的收敛方式。特别地,我们考察了遍历过程和强混合过程,并获得了若干渐近结果以及有限样本误差界。我们以核主成分分析在依赖数据下的一致性结果以及转移概率的条件均值嵌入的形式提供了理论的应用。最后,我们使用我们的方法来研究马尔可夫转移算子的非参数估计,并强调我们的理论如何为包括基于核的动态模式分解在内的一大类谱分析方法给出一致性分析。

英文摘要:

We consider autocovariance operators of a stationary stochastic process on a Polish space that is embedded into a reproducing kernel Hilbert space. We investigate how empirical estimates of these operators converge along realizations of the process under various conditions. In particular, we examine ergodic and strongly mixing processes and obtain several asymptotic results as well as finite sample error bounds. We provide applications of our theory in terms of consistency results for kernel PCA with dependent data and the conditional mean embedding of transition probabilities. Finally, we use our approach to examine the nonparametric estimation of Markov transition operators and highlight how our theory can give a consistency analysis for a large family of spectral analysis methods including kernel-based dynamic mode decomposition.

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。

↑