Real-world time series often exhibit complex interdependencies that cannot be captured in isolation. Global models that model past data from multiple related time series globally while producing series-specific forecasts locally are now common. However, their forecasts for each individual series remain isolated, failing to account for the current state of its neighbouring series. Multivariate models like multivariate attention and graph neural networks can explicitly incorporate inter-series information, thus addressing the shortcomings of global models. However, these techniques exhibit quadratic complexity per timestep, limiting scalability. This paper introduces the Context Neural Network, an efficient linear complexity approach for augmenting time series models with relevant contextual insights from neighbouring time series without significant computational overhead. The proposed method enriches predictive models by providing the target series with real-time information from its neighbours, addressing the limitations of global models, yet remaining computationally tractable for large datasets.

该研究提出了一种具有线性复杂度的Context Neural Network方法，可以有效地为时间序列模型提供和其邻近时间序列相关的上下文见解，从而丰富预测模型，解决全局模型的局限性，并且对于大型数据集具有可计算性可扩展性。

上下文神经网络：一种可扩展的多元模型用于时间序列预测