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具有M估计的分层时间序列预测的鲁棒最优协调

Robust optimal reconciliation for hierarchical time series forecasting with M-estimation

School of Economics and Management, Beihang University(北京航空航天大学经济管理学院);Data Management Department, Industrial and Commercial Bank of China Limited(中国工商银行股份有限公司数据管理部);MOE Key Laboratory of Complex System Analysis and Management Decision, Beihang University(北京航空航天大学复杂系统分析与管理决策教育部重点实验室);Department of Mathematics, The University of Manchester(曼彻斯特大学数学系)

Zhichao Wang, Shanshan Wang, Wei Cao, Fei Yang

AI总结:

本文提出了一种基于M估计的鲁棒协调方法,用于改进分层时间序列预测中对异常值的鲁棒性,并通过实验证明其在处理异常情况和无异常情况下的有效性。

摘要:

聚合约束,源于地理或部门划分,在大量的时间序列中经常出现。这些受约束序列的连贯预测预计要符合由聚合规则组织的层次结构。为了提高其对潜在不规则序列的鲁棒性,我们探索了分层时间序列(HTS)预测的鲁棒协调过程。我们通过最小化一个稳健损失函数,将M估计用于获得协调预测,该损失函数将受聚合约束的一组基础预测转换为。相关的最小化过程通过修改的牛顿-拉夫森算法通过局部二次近似进行开发和实现。进行了广泛的数值实验来评估所提出方法的性能,结果表明其在处理大量异常情况(例如,具有非正态误差的序列)时的可行性。所提出的鲁棒协调在HTS中没有异常值时也表现出色。最后,我们通过澳大利亚国内旅游的实数据研究展示了所提出方法的实际应用。

英文摘要:

Aggregation constraints, arising from geographical or sectoral division, frequently emerge in a large set of time series. Coherent forecasts of these constrained series are anticipated to conform to their hierarchical structure organized by the aggregation rules. To enhance its resilience against potential irregular series, we explore the robust reconciliation process for hierarchical time series (HTS) forecasting. We incorporate M-estimation to obtain the reconciled forecasts by minimizing a robust loss function of transforming a group of base forecasts subject to the aggregation constraints. The related minimization procedure is developed and implemented through a modified Newton-Raphson algorithm via local quadratic approximation. Extensive numerical experiments are carried out to evaluate the performance of the proposed method, and the results suggest its feasibility in handling numerous abnormal cases (for instance, series with non-normal errors). The proposed robust reconciliation also demonstrates excellent efficiency when no outliers exist in HTS. Finally, we showcase the practical application of the proposed method in a real-data study on Australian domestic tourism.

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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