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Retrieval-Augmented Generation (RAG) has emerged as a powerful approach for enhancing large language models' question-answering capabilities through the integration of external knowledge. However, when adapting RAG systems to specialized…

Computation and Language · Computer Science 2026-01-19 Xin Sun , Zhongqi Chen , Qiang Liu , Shu Wu , Bowen Song , Weiqiang Wang , Zilei Wang , Liang Wang

Human Activity Recognition (HAR) models often suffer from performance degradation in real-world applications due to distribution shifts in activity patterns across individuals. Test-Time Adaptation (TTA) is an emerging learning paradigm…

Computer Vision and Pattern Recognition · Computer Science 2024-02-08 Shuoyuan Wang , Jindong Wang , HuaJun Xi , Bob Zhang , Lei Zhang , Hongxin Wei

Unsupervised Domain Adaptation (UDA) aims to harness labeled source data to train models for unlabeled target data. Despite extensive research in domains like computer vision and natural language processing, UDA remains underexplored for…

Machine Learning · Computer Science 2025-07-29 Hassan Ismail Fawaz , Ganesh Del Grosso , Tanguy Kerdoncuff , Aurelie Boisbunon , Illyyne Saffar

Medical imaging datasets often vary due to differences in acquisition protocols, patient demographics, and imaging devices. These variations in data distribution, known as domain shift, present a significant challenge in adapting imaging…

Computer Vision and Pattern Recognition · Computer Science 2026-03-16 Doron Serebro , Tammy Riklin-Raviv

Domain adaptation (DA) aims to transfer the knowledge learned from a source domain to an unlabeled target domain. Some recent works tackle source-free domain adaptation (SFDA) where only a source pre-trained model is available for…

Computer Vision and Pattern Recognition · Computer Science 2021-10-11 Shiqi Yang , Yaxing Wang , Joost van de Weijer , Luis Herranz , Shangling Jui

Source-free domain adaptation is a crucial machine learning topic, as it contains numerous applications in the real world, particularly with respect to data privacy. Existing approaches predominantly focus on Euclidean data, such as images…

Machine Learning · Computer Science 2024-10-23 Junyu Luo , Yiyang Gu , Xiao Luo , Wei Ju , Zhiping Xiao , Yusheng Zhao , Jingyang Yuan , Ming Zhang

Computer vision has flourished in recent years thanks to Deep Learning advancements, fast and scalable hardware solutions and large availability of structured image data. Convolutional Neural Networks trained on supervised tasks with…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Antono D'Innocente

3D-aware image generation necessitates extensive training data to ensure stable training and mitigate the risk of overfitting. This paper first considers a novel task known as One-shot 3D Generative Domain Adaptation (GDA), aimed at…

Computer Vision and Pattern Recognition · Computer Science 2024-10-14 Ziqiang Li , Yi Wu , Chaoyue Wang , Xue Rui , Bin Li

Distribution shift presents a significant challenge in machine learning, where models often underperform during the test stage when faced with a different distribution than the one they were trained on. This paper focuses on domain shifts,…

Machine Learning · Computer Science 2024-03-19 Huaxiu Yao , Xinyu Yang , Xinyi Pan , Shengchao Liu , Pang Wei Koh , Chelsea Finn

Cross-user variability poses a significant challenge in sensor-based Human Activity Recognition (HAR) systems, as traditional models struggle to generalize across users due to differences in behavior, sensor placement, and data…

Machine Learning · Computer Science 2025-06-04 Xiaozhou Ye , Kevin I-Kai Wang

Similarity measures for time series are important problems for time series classification. To handle the nonlinear time distortions, Dynamic Time Warping (DTW) has been widely used. However, DTW is not learnable and suffers from a trade-off…

Computer Vision and Pattern Recognition · Computer Science 2023-09-14 Shinnosuke Matsuo , Xiaomeng Wu , Gantugs Atarsaikhan , Akisato Kimura , Kunio Kashino , Brian Kenji Iwana , Seiichi Uchida

Sensor-based Human Activity Recognition (HAR) is crucial in ubiquitous computing, analysing behaviours through multi-dimensional observations. Despite research progress, HAR confronts challenges, particularly in data distribution…

Signal Processing · Electrical Eng. & Systems 2025-03-05 Xiaozhou Ye , Kouichi Sakurai , Nirmal Nair , Kevin I-Kai Wang

In speaker-independent speech emotion recognition, the training and testing samples are collected from diverse speakers, leading to a multi-domain shift challenge across the feature distributions of data from different speakers.…

Sound · Computer Science 2024-01-19 Cheng Lu , Yuan Zong , Hailun Lian , Yan Zhao , Björn Schuller , Wenming Zheng

Most approaches that model time-series data in human activity recognition based on body-worn sensing (HAR) use a fixed size temporal context to represent different activities. This might, however, not be apt for sets of activities with…

Computer Vision and Pattern Recognition · Computer Science 2018-05-22 Vishvak S Murahari , Thomas Ploetz

Domain adaptation (DA) techniques help deep learning models generalize across data shifts for point cloud semantic segmentation (PCSS). Test-time adaptation (TTA) allows direct adaptation of a pre-trained model to unlabeled data during…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Puzuo Wang , Wei Yao , Jie Shao , Zhiyi He

Deep learning-based semantic segmentation models achieve impressive results yet remain limited in handling distribution shifts between training and test data. In this paper, we present SDGPA (Synthetic Data Generation and Progressive…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Jun Luo , Zijing Zhao , Yang Liu

Federated learning methods enable us to train machine learning models on distributed user data while preserving its privacy. However, it is not always feasible to obtain high-quality supervisory signals from users, especially for vision…

Computer Vision and Pattern Recognition · Computer Science 2021-08-18 Chun-Han Yao , Boqing Gong , Yin Cui , Hang Qi , Yukun Zhu , Ming-Hsuan Yang

Since real-world machine systems are running in non-stationary environments, Continual Test-Time Adaptation (CTTA) task is proposed to adapt the pre-trained model to continually changing target domains. Recently, existing methods mainly…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Jiaming Liu , Senqiao Yang , Peidong Jia , Renrui Zhang , Ming Lu , Yandong Guo , Wei Xue , Shanghang Zhang

LiDAR semantic segmentation provides 3D semantic information about the environment, an essential cue for intelligent systems during their decision making processes. Deep neural networks are achieving state-of-the-art results on large public…

Computer Vision and Pattern Recognition · Computer Science 2021-12-06 Inigo Alonso , Luis Riazuelo , Luis Montesano , Ana C. Murillo

As graph representation learning often suffers from label scarcity problems in real-world applications, researchers have proposed graph domain adaptation (GDA) as an effective knowledge-transfer paradigm across graphs. In particular, to…

Machine Learning · Computer Science 2024-12-31 Boshen Shi , Yongqing Wang , Fangda Guo , Bingbing Xu , Huawei Shen , Xueqi Cheng