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Time series domain adaptation aims to transfer the complex temporal dependence from the labeled source domain to the unlabeled target domain. Recent advances leverage the stable causal mechanism over observed variables to model the…

Machine Learning · Computer Science 2025-02-25 Ruichu Cai , Junxian Huang , Zhenhui Yang , Zijian Li , Emadeldeen Eldele , Min Wu , Fuchun Sun

We introduce an extension of the partitioned local depth (PaLD) algorithm that is adapted to online applications such as semi-supervised prediction. PaLD is best known for unsupervised, parameter-free clustering, but its robustness is based…

Machine Learning · Statistics 2026-05-25 John D. Foley , Justin T. Lee

In the era of increasingly complex AI models for time series forecasting, progress is often measured by marginal improvements on benchmark leaderboards. However, this approach suffers from a fundamental flaw: standard evaluation metrics…

Machine Learning · Computer Science 2026-05-28 Wanjin Feng , Yuan Yuan , Jingtao Ding , Yong Li

Time series classification is a critical task in various domains, such as finance, healthcare, and sensor data analysis. Unsupervised contrastive learning has garnered significant interest in learning effective representations from time…

Machine Learning · Computer Science 2025-03-24 Huili Cai , Xiang Zhang , Xiaofeng Liu

Inspired by the remarkable zero-shot generalization capacity of vision-language pre-trained model, we seek to leverage the supervision from CLIP model to alleviate the burden of data labeling. However, such supervision inevitably contains…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Junchu Huang , Weijie Chen , Shicai Yang , Di Xie , Shiliang Pu , Yueting Zhuang

Audio-Visual Video Parsing (AVVP) task aims to detect and temporally locate events within audio and visual modalities. Multiple events can overlap in the timeline, making identification challenging. While traditional methods usually focus…

Artificial Intelligence · Computer Science 2024-07-12 Jinxing Zhou , Dan Guo , Yuxin Mao , Yiran Zhong , Xiaojun Chang , Meng Wang

Spatio-Temporal Graph Neural Networks (STGNNs) have emerged as a powerful tool for modeling dynamic graph-structured data across diverse domains. However, they often fail to generalize in Spatio-Temporal Out-of-Distribution (STOOD)…

Machine Learning · Computer Science 2025-10-14 Haoyu Zhang , Wentao Zhang , Hao Miao , Xinke Jiang , Yuchen Fang , Yifan Zhang

Open-set semi-supervised learning (OSSL) leverages unlabeled data containing both in-distribution (ID) and unknown out-of-distribution (OOD) samples, aiming simultaneously to improve closed-set accuracy and detect novel OOD instances.…

Machine Learning · Computer Science 2026-01-19 You Rim Choi , Subeom Park , Seojun Heo , Eunchung Noh , Hyung-Sin Kim

Universal time series representation learning is challenging but valuable in real-world applications such as classification, anomaly detection, and forecasting. Recently, contrastive learning (CL) has been actively explored to tackle time…

Machine Learning · Computer Science 2025-02-06 Namwoo Kim , Hyungryul Baik , Yoonjin Yoon

The detection of anomalies in non-stationary time-series streams is a critical but challenging task across numerous industrial and scientific domains. Traditional models, trained offline, suffer significant performance degradation when…

Machine Learning · Computer Science 2025-09-01 Ashok Devireddy , Shunping Huang

We present STAMP (Selective Task-Aware Mechanism for Text Privacy), a new framework for task-aware text privatization that achieves an improved privacy-utility trade-off. STAMP selectively allocates privacy budgets across tokens by jointly…

Machine Learning · Computer Science 2026-03-13 Fengwei Tian , Payel Bhattacharjee , Heidi Hanson , Geoffrey D. Rubin , Joseph Y. Lo , Ravi Tandon

Complex systems are typically characterized by intricate internal dynamics that are often hard to elucidate. Ideally, this requires methods that allow to detect and classify in unsupervised way the microscopic dynamical events occurring in…

Data Analysis, Statistics and Probability · Physics 2024-11-26 Matteo Becchi , Federico Fantolino , Giovanni M. Pavan

Modern mobile devices are able to provide context-aware and personalized services to the users, by leveraging on their sensing capabilities to infer the activity and situation in which a person is currently involved. Current solutions for…

Machine Learning · Computer Science 2023-07-10 Mattia Giovanni Campana , Franca Delmastro

Change-point detection (CPD), which detects abrupt changes in the data distribution, is recognized as one of the most significant tasks in time series analysis. Despite the extensive literature on offline CPD, unsupervised online CPD still…

Machine Learning · Computer Science 2023-12-07 Zahra Atashgahi , Decebal Constantin Mocanu , Raymond Veldhuis , Mykola Pechenizkiy

Many existing models for clinical trial outcome prediction are optimized using task-specific loss functions on trial phase-specific data. While this scheme may boost prediction for common diseases and drugs, it can hinder learning of…

Machine Learning · Computer Science 2025-05-27 Yiqing Zhang , Xiaozhong Liu , Fabricio Murai

Time series anomaly detection (TSAD) is a vital yet challenging task, particularly in scenarios where labeled anomalies are scarce and temporal dependencies are complex. Recent anomaly assumption (AA) approaches alleviate the lack of…

Machine Learning · Computer Science 2025-09-09 Xudong Mou , Rui Wang , Tiejun Wang , Renyu Yang , Shiru Chen , Jie Sun , Tianyu Wo , Xudong Liu

Time series classification (TSC), the problem of predicting class labels of time series, has been around for decades within the community of data mining and machine learning, and found many important applications such as biomedical…

Computer Vision and Pattern Recognition · Computer Science 2016-05-12 Zhicheng Cui , Wenlin Chen , Yixin Chen

Recently, deep self-training approaches emerged as a powerful solution to the unsupervised domain adaptation. The self-training scheme involves iterative processing of target data; it generates target pseudo labels and retrains the network.…

Computer Vision and Pattern Recognition · Computer Science 2020-12-10 Inkyu Shin , Sanghyun Woo , Fei Pan , InSo Kweon

In text classification tasks, useful information is encoded in the label names. Label semantic aware systems have leveraged this information for improved text classification performance during fine-tuning and prediction. However, use of…

Computation and Language · Computer Science 2022-05-31 Aaron Mueller , Jason Krone , Salvatore Romeo , Saab Mansour , Elman Mansimov , Yi Zhang , Dan Roth

Leveraging pre-trained 2D image representations in behavior cloning policies has achieved great success and has become a standard approach for robotic manipulation. However, such representations fail to capture the 3D spatial information…

Robotics · Computer Science 2026-05-07 I-Chun Arthur Liu , Krzysztof Choromanski , Sandy Huang , Connor Schenck