arXiv Machine Learning

DISC: Domain-Integrated Similarity Cost for Time-Series Dataset

The paper introduces DISC, a Domain-Integrated Similarity Cost framework that learns to aggregate multiple similarity metrics for time‑series datasets. By calibrating on transfer observations, DISC selects, weights, and combines metrics to better predict downstream forecasting performance than any single metric. The authors demonstrate that task‑dependent similarity estimation improves alignment with actual transfer behavior in out‑of‑distribution and transfer‑learning scenarios.

arXiv AI
Sep 3

SMart: A Multi-source Multi-phase Time Series Representation Transfer Framework

SMart is a new time series representation learning framework that combines a multi-phase recurrence plot recovery task with a source dataset selector. The recovery task uses three alternative modes to guide the encoder in capturing time series dynamics, while the selector chooses multiple suitable source datasets to augment the target dataset during pre‑training. Experiments demonstrate that SMart surpasses state‑of‑the‑art models, reducing mean absolute error by up to 19.5% in regression and increasing classification accuracy by up to 1.34%.

By Fang He, Wang-chien Lee
arXiv Machine Learning
Aug 11

CPDA: Class-Conditional Path Distribution Alignment for Unsupervised Time-Series Domain Adaptation

arXiv:2608. 09193v1 Announce Type: cross Abstract: Unsupervised time-series domain adaptation (DA) addresses the challenge of transferring a classifier from a labeled source domain to an unlabeled target domain under distribution shifts induced by different users, sensors, devices, acquisition conditions, or temporal dynamics.

By Felix Ott, Christopher Mutschler
arXiv AI
Oct 9

TAM: Task-Aware Memory Distillation for Efficient Spatiotemporal Prediction

TAM (Task‑Aware Memory Distillation) is a framework that stores a frozen teacher’s knowledge in a bounded, retrievable memory, encoding latent features, forecast changes, or flow residuals. During training, the student matches the teacher’s similarity distribution over shared references or regresses observation‑conditioned residual prototypes, complementing supervised prediction and conventional distillation. Experiments on video prediction, weather forecasting, and traffic flow prediction show that TAM improves SSIM on all six video datasets and reduces MSE on five, achieving up to 1.93% MSE reduction on WeatherBench without affecting student inference cost.

By Yuqi Li, Xiaoqin Feng, Fan Xu, Weilun Feng, Chuanguang Yang, Yingli Tian, Hao Wu
arXiv Machine Learning
Oct 21

Adaptive Dual-Teacher Distillation with Subnetwork Rectification for Bridging Semantic Gaps in Black-Box Domain Adaptation

The paper introduces Adaptive Dual-Teacher Distillation with Subnetwork Rectification (DDSR), a method for black-box domain adaptation that fuses predictions from a black-box source model and a vision‑language model to generate reliable pseudo‑labels for the target domain. DDSR uses adaptive prediction fusion, subnetwork regularization to prevent overfitting, iterative refinement of pseudo‑labels and prompts, and class‑wise prototypes for self‑training. Experiments on several benchmark datasets show that DDSR outperforms existing state‑of‑the‑art approaches, even those that have access to source data or source model parameters.

By Zhe Zhang, Jing Li, Wanli Xue, Xu Cheng, Jianhua Zhang, Qinghua Hu, Shengyong Chen
arXiv AI
Jul 23

Post-Training in Time Series Foundation Models: A Unifying Framework

arXiv:2607. 20002v1 Announce Type: cross Abstract: Time series foundation models (TSFMs) have emerged as general-purpose models for time series analysis, but pretraining alone is often insufficient for reliable downstream deployment.

By Shifeng Xie, Ambroise Odonnat, Zehao Xiao, Lei Zan, Malik Tiomoko, Lujia Pan, Themis Palpanas, Boris N. Oreshkin, Chenghao Liu, Keli Zhang