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Unlike quasi-static robotic manipulation tasks like pick-and-place, dynamic tasks such as non-prehensile manipulation pose greater challenges, especially for vision-based control. Successful control requires the extraction of features…

We introduce Masked Trajectory Models (MTM) as a generic abstraction for sequential decision making. MTM takes a trajectory, such as a state-action sequence, and aims to reconstruct the trajectory conditioned on random subsets of the same…

Machine Learning · Computer Science 2023-05-05 Philipp Wu , Arjun Majumdar , Kevin Stone , Yixin Lin , Igor Mordatch , Pieter Abbeel , Aravind Rajeswaran

With the great success of pre-trained models, the pretrain-then-finetune paradigm has been widely adopted on downstream tasks for source code understanding. However, compared to costly training a large-scale model from scratch, how to…

Software Engineering · Computer Science 2022-03-16 Deze Wang , Zhouyang Jia , Shanshan Li , Yue Yu , Yun Xiong , Wei Dong , Xiangke Liao

Trajectory data play a crucial role in many applications, ranging from network optimization to urban planning. Existing studies on trajectory data are task-specific, and their applicability is limited to the specific tasks on which they…

Machine Learning · Computer Science 2025-01-24 Qingyue Long , Can Rong , Huandong Wang , Yong Li

Imitation learning offers a promising path for robots to learn general-purpose behaviors, but traditionally has exhibited limited scalability due to high data supervision requirements and brittle generalization. Inspired by recent advances…

Machine Learning · Computer Science 2022-11-16 Soroush Nasiriany , Tian Gao , Ajay Mandlekar , Yuke Zhu

Person re-identification is indeed a challenging visual recognition task due to the critical issues of human pose variation, human body occlusion, camera view variation, etc. To address this, most of the state-of-the-art approaches are…

Computer Vision and Pattern Recognition · Computer Science 2018-07-31 Fu Xiong , Yang Xiao , Zhiguo Cao , Kaicheng Gong , Zhiwen Fang , Joey Tianyi Zhou

Understanding traffic participants' behaviour is crucial for predicting their future trajectories, aiding in developing safe and reliable planning systems for autonomous vehicles. Integrating cognitive processes and machine learning models…

Machine Learning · Computer Science 2023-06-05 Frederik S. B. Westerhout , Julian F. Schumann , Arkady Zgonnikov

As a dominant paradigm, fine-tuning a pre-trained model on the target data is widely used in many deep learning applications, especially for small data sets. However, recent studies have empirically shown that training from scratch has the…

Computer Vision and Pattern Recognition · Computer Science 2022-05-27 Ziquan Liu , Yi Xu , Yuanhong Xu , Qi Qian , Hao Li , Xiangyang Ji , Antoni Chan , Rong Jin

Recent work on time-series models has leveraged self-supervised training to learn meaningful features and patterns in order to improve performance on downstream tasks and generalize to unseen modalities. While these pretraining methods have…

Machine Learning · Computer Science 2026-04-10 Paul Quinlan , Qingguo Li , Xiaodan Zhu

Modeling large-scale time series has gained significant attention in recent years. However, its direct application in finance remains challenging due to substantial differences in data characteristics across domains. Specifically, financial…

Artificial Intelligence · Computer Science 2025-10-22 Yuanjian Xu , Anxian Liu , Jianing Hao , Zhenzhuo Li , Shichang Meng , Guang Zhang

The map-matching is an essential preprocessing step for most of the trajectory-based applications. Although it has been an active topic for more than two decades and, driven by the emerging applications, is still under development. There is…

Databases · Computer Science 2019-10-30 Pingfu Chao , Yehong Xu , Wen Hua , Xiaofang Zhou

Following its success in natural language processing and computer vision, foundation models that are pre-trained on large-scale multi-task datasets have also shown great potential in robotics. However, most existing robot foundation models…

Robotics · Computer Science 2025-03-13 Rujia Yang , Geng Chen , Chuan Wen , Yang Gao

Next-location prediction, consisting of forecasting a user's location given their historical trajectories, has important implications in several fields, such as urban planning, geo-marketing, and disease spreading. Several predictors have…

Artificial Intelligence · Computer Science 2022-03-08 Massimiliano Luca , Luca Pappalardo , Bruno Lepri , Gianni Barlacchi

When does a machine learning model predict the future of individuals and when does it recite patterns that predate the individuals? In this work, we propose a distinction between these two pathways of prediction, supported by theoretical,…

Machine Learning · Computer Science 2024-03-12 Moritz Hardt , Michael P. Kim

While Wi-Fi sensing offers a compelling, privacy-preserving alternative to cameras, its practical utility has been fundamentally undermined by a lack of robustness across domains. Models trained in one setup fail to generalize to new…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Cheng Jiang , Yihe Yan , Yanxiang Wang , Chun Tung Chou , Wen Hu

The current Air Traffic Management (ATM) system worldwide has reached its limits in terms of predictability, efficiency and cost effectiveness. Different initiatives worldwide propose trajectory-oriented transformations that require high…

Machine Learning · Computer Science 2020-05-19 Alevizos Bastas , Theocharis Kravaris , George A. Vouros

Foundation Models (FMs) are models trained on large corpora of data that, at very large scale, can generalize to new tasks without any task-specific finetuning. As these models continue to grow in size, innovations continue to push the…

Machine Learning · Computer Science 2022-12-27 Avanika Narayan , Ines Chami , Laurel Orr , Simran Arora , Christopher Ré

Recently the emergence of novel presentation attacks has drawn increasing attention to face anti-spoofing. However, existing methods tend to memorize data patterns from the training set, resulting in poor generalization to unknown attack…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Fangling Jiang , Qi Li , Weining Wang , Gang Wang , Bing Liu , Zhenan Sun

Visual grounding is the task of localising image regions from natural language queries and is critical for reasoning capable Graphical User Interface agents. Many existing methods rely on massive, noisy synthetic datasets. This work…

Artificial Intelligence · Computer Science 2025-11-17 Georgios Pantazopoulos , Eda B. Özyiğit

A large amount of data resulting from trajectories of moving objects activities are collected thanks to localization based services and some associated automated processes. Trajectories data can be used either for transactional and analysis…

Databases · Computer Science 2011-02-23 Wided Oueslati , Jalel Akaichi