The performance of a machine learning model degrades when it is applied to data from a similar but different domain than the data it has initially been trained on. To mitigate this domain shift problem, domain adaptation (DA) techniques search for an optimal transformation that converts the (current) input data from a source domain to a target domain to learn a domain-invariant representations that reduces domain discrepancy. This paper proposes a novel supervised domain adaptation based on two steps. First, we search for an optimal class-dependent transformation from the source to the target domain from a few samples. We consider optimal transport methods such as the earth mover distance with Laplacian regularization, Sinkhorn transport and correlation alignment. Second, we use embedding similarity techniques to select the corresponding transformation at inference. We use correlation metrics and maximum mean discrepancy with higher-order moment matching techniques. We conduct an extensive evaluation on time-series datasets with domain shift including simulated and various online handwriting datasets to demonstrate the performance.

本文提出一种新的基于监督学习的域适应技术，利用最优传输方法和嵌入相似性技术，从少量样本中搜索最优类别相关转换，并在推理中选择相应的转换，能够减小领域差异，并在多个包括模拟和手写数据集的领域漂移时间序列数据集上进行了广泛的评估。

领域自适应时间序列分类以减轻协变量漂移