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arXiv 2605.23402cs.LGcs.AI
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非平稳概率时间序列预测的参数先验映射框架

Parametric Prior Mapping Framework for Non-stationary Probabilistic Time Series Forecasting

School of Computer Science and Engineering(计算机科学与工程学院)

Jinglin Li, Jun Tan, QI Fang, Ning Gui

AI总结:

提出参数先验映射(PPM)框架,通过将参数化结构先验注入生成模型,结合混合目标训练,在非平稳概率多变量时间序列预测中实现精度与计算效率的平衡。

摘要:

在概率多变量时间序列(MTS)预测中有效建模非平稳动态需要在表达性和鲁棒性之间取得平衡。现有参数方法受益于强归纳偏置但缺乏灵活性,而深度生成模型在没有大量数据和计算的情况下难以捕捉复杂的时间依赖性。我们引入了参数先验映射(PPM),这是一个将参数化结构先验注入生成建模过程的框架。具体来说,PPM利用参数化估计器推导出一个动态的自适应先验,通过可学习的映射指导复杂预测分布的学习。这种设计使模型能够保留参数方法的效率,同时利用生成模型的表达能力。通过混合目标训练,PPM产生精确的预测,并具有良好校准的不确定性估计。实验结果表明,PPM在处理非平稳数据方面优于现有基线,在精度和计算效率之间提供了更好的权衡。代码可在https://github.com/ljl8336/PPM获取。

英文摘要:

Effectively modeling non-stationary dynamics in probabilistic multivariate time series(MTS) forecasting requires balancing expressiveness with robustness. Existing parametric approaches benefit from strong inductive biases but lack flexibility, whereas deep generative models struggle to capture complex temporal dependencies without extensive data and computation. We introduce Parametric Prior Mapping (PPM), a framework that injects parametric structural priors into a generative modeling process. Specifically, PPM utilizes a parametric estimator to derive a dynamic, adaptive prior that guides the learning of a complex predictive distribution via a learnable mapping. This design allows the model to retain the efficiency of parametric methods while exploiting the expressive power of generative models. Trained with a hybrid objective, PPM yields precise forecasts with well-calibrated uncertainty estimates. Empirical results show that PPM outperforms existing baselines in handling non-stationary data, offering a superior trade-off between accuracy and computational efficiency. The code is available at https://github.com/ljl8336/PPM.

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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