arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2212.03079stat.ME
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局部平稳随机场的Model-Based和Model-Free点预测算法

Model-Based and Model-Free point prediction algorithms for locally stationary random fields

Srinjoy Das, Yiwen Zhang, Dimitris N. Politis

摘要:

无模型预测原理已成功地应用于一般的回归问题,以及涉及平稳和局部平稳时间序列的问题。在本文中,我们演示了无模型预测如何应用于处理仅局部平稳的随机场,即,可以假设它们仅在其整个定义区域上的有限部分上是静止的。我们构建了一步领先点预测器,并使用包含趋势和/或异方差的模型比较了无模型预测和基于模型预测的性能。这两个方面的文件,无模型和模型为基础的,是新颖的随机场的背景下,是本地(但不是全球)平稳。我们展示了我们的基于模型和无模型点预测方法在合成数据以及CIFAR-10数据集图像中的应用,在后一种情况下,我们最好的无模型点预测结果优于使用基于模型的预测获得的结果。

英文摘要:

The Model-free Prediction Principle has been successfully applied to general regression problems, as well as problems involving stationary and locally stationary time series. In this paper we demonstrate how Model-Free Prediction can be applied to handle random fields that are only locally stationary, i.e., they can be assumed to be stationary only across a limited part over their entire region of definition. We construct one-step-ahead point predictors and compare the performance of Model-free to Model-based prediction using models that incorporate a trend and/or heteroscedasticity. Both aspects of the paper, Model-free and Model-based, are novel in the context of random fields that are locally (but not globally) stationary. We demonstrate the application of our Model-based and Model-free point prediction methods to synthetic data as well as images from the CIFAR-10 dataset and in the latter case show that our best Model-free point prediction results outperform those obtained using Model-based prediction.

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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