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Time series forecasting is not just numerical extrapolation, but often requires reasoning with unstructured contextual data such as news or events. While specialized Time Series Foundation Models (TSFMs) excel at forecasting based on…

Deep neural networks (DNNs) have achieved state-of-the-art results on time series classification (TSC) tasks. In this work, we focus on leveraging DNNs in the often-encountered practical scenario where access to labeled training data is…

Machine Learning · Computer Science 2021-03-05 Jyoti Narwariya , Pankaj Malhotra , Lovekesh Vig , Gautam Shroff , Vishnu Tv

The zero-shot evaluation of time series foundation models (TSFMs) for classification typically uses a frozen encoder followed by a task-specific classifier. However, this practice violates the training-free premise of zero-shot deployment…

Machine Learning · Computer Science 2026-02-03 Juntao Fang , Shifeng Xie , Shengbin Nie , Yuhui Ling , Yuming Liu , Zijian Li , Keli Zhang , Lujia Pan , Themis Palpanas , Ruichu Cai

Test-time adaptation (TTA) has gained increasing popularity due to its efficacy in addressing ``distribution shift'' issue while simultaneously protecting data privacy. However, most prior methods assume that a paired source domain model…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Aiming Zhang , Tianyuan Yu , Liang Bai , Jun Tang , Yanming Guo , Yirun Ruan , Yun Zhou , Zhihe Lu

Language-guided segmentation transcends the scope limitations of traditional semantic segmentation, enabling models to segment arbitrary target regions based on natural language instructions. Existing approaches typically adopt a two-stage…

Computer Vision and Pattern Recognition · Computer Science 2026-05-14 Chao Hao , Jun Xu , Ji Du , Shuo Ye , Ziyue Qiao , Xiaodong Cun , Guangcong Wang , Xubin Zheng , Zitong Yu

Given the significant potential of large language models (LLMs) in sequence modeling, emerging studies have begun applying them to time-series forecasting. Despite notable progress, existing methods still face two critical challenges: 1)…

Artificial Intelligence · Computer Science 2025-01-09 Pengfei Wang , Huanran Zheng , Qi'ao Xu , Silong Dai , Yiqiao Wang , Wenjing Yue , Wei Zhu , Tianwen Qian , Xiaoling Wang

Large Language Models (LLMs) have demonstrated remarkable capabilities across a wide range of natural language processing tasks. These capabilities stem primarily from the self-attention mechanism, which enables modeling of long-range…

Computation and Language · Computer Science 2026-01-05 Zeng You , Yaofo Chen , Shuhai Zhang , Zhijie Qiu , Tingyu Wu , Yingjian Li , Yaowei Wang , Mingkui Tan

Recent Transformer-based large language models (LLMs) demonstrate in-context learning ability to perform various functions based solely on the provided context, without updating model parameters. To fully utilize the in-context capabilities…

Machine Learning · Computer Science 2026-02-06 Jiecheng Lu , Yan Sun , Shihao Yang

Learning time-series representations when only unlabeled data or few labeled samples are available can be a challenging task. Recently, contrastive self-supervised learning has shown great improvement in extracting useful representations…

Machine Learning · Computer Science 2023-09-06 Emadeldeen Eldele , Mohamed Ragab , Zhenghua Chen , Min Wu , Chee-Keong Kwoh , Xiaoli Li , Cuntai Guan

Large language models are increasingly deployed as multi-agent systems, where specialized roles communicate and collaborate through structured interactions to solve complex tasks that often exceed the capacity of a single agent. However,…

Computation and Language · Computer Science 2026-01-28 Yimeng Wang , Jiaxing Zhao , Hongbin Xie , Hexing Ma , Yuzhen Lei , Shuangxue Liu , Xuan Song , Zichen Zhang , Haoran Zhang

In the time-series domain, an increasing number of works combine text with temporal data to leverage the reasoning capabilities of large language models (LLMs) for various downstream time-series understanding tasks. This enables a single…

Computation and Language · Computer Science 2025-11-11 Zhirui Zhang , Changhua Pei , Tianyi Gao , Zhe Xie , Yibo Hao , Zhaoyang Yu , Longlong Xu , Tong Xiao , Jing Han , Dan Pei

Time series foundation models have shown impressive performance on a variety of tasks, across a wide range of domains, even in zero-shot settings. However, most of these models are designed to handle short univariate time series as an…

Machine Learning · Computer Science 2024-09-23 Nina Żukowska , Mononito Goswami , Michał Wiliński , Willa Potosnak , Artur Dubrawski

Time Series Classification (TSC) is a long-standing research problem that has gained increasing attention in recent years with the rapid growth of large-scale temporal data. Despite substantial progress enabled by deep learning, designing…

Machine Learning · Computer Science 2026-05-22 Xianhao Song , Yuang Zhang , Yuqi She , Liping Wang , Xuemin Lin

Time series data are integral to critical applications across domains such as finance, healthcare, transportation, and environmental science. While recent work has begun to explore multi-task time series question answering (QA), current…

Test-Time Scaling (TTS) is a promising approach to progressively elicit the model's intelligence during inference. Recently, training-based TTS methods, such as continued reinforcement learning (RL), have further surged in popularity, while…

Computation and Language · Computer Science 2025-09-10 Kaiyan Chang , Yonghao Shi , Chenglong Wang , Hang Zhou , Chi Hu , Xiaoqian Liu , Yingfeng Luo , Yuan Ge , Tong Xiao , Jingbo Zhu

The ubiquity of time series data creates a strong demand for general-purpose foundation models, yet developing them for classification remains a significant challenge, largely due to the high cost of labeled data. Foundation models capable…

Machine Learning · Computer Science 2025-11-27 Chin-Chia Michael Yeh , Uday Singh Saini , Junpeng Wang , Xin Dai , Xiran Fan , Jiarui Sun , Yujie Fan , Yan Zheng

Time-series question answering (TSQA) tasks face significant challenges due to the lack of labeled data. Alternatively, with recent advancements in large-scale models, vision-language models (VLMs) have demonstrated the potential to analyze…

Machine Learning · Computer Science 2025-10-01 Takuya Fujimura , Kota Dohi , Natsuo Yamashita , Yohei Kawaguchi

Time series data is fundamental to decision-making across many domains including healthcare, finance, power systems, and logistics. However, analyzing this data correctly often requires incorporating unstructured contextual information,…

Machine Learning · Computer Science 2026-03-17 Felix Parker , Nimeesha Chan , Chi Zhang , Kimia Ghobadi

Time Series Classification (TSC) encompasses two settings: classifying entire sequences or classifying segmented subsequences. The raw time series for segmented TSC usually contain Multiple classes with Varying Duration of each class (MVD).…

Artificial Intelligence · Computer Science 2025-04-24 Junru Chen , Tianyu Cao , Jing Xu , Jiahe Li , Zhilong Chen , Tao Xiao , Yang Yang

Thematic Analysis (TA) is a widely used qualitative method that provides a structured yet flexible framework for identifying and reporting patterns in clinical interview transcripts. However, manual thematic analysis is time-consuming and…

Computation and Language · Computer Science 2025-09-23 Seungjun Yi , Joakim Nguyen , Huimin Xu , Terence Lim , Joseph Skrovan , Mehak Beri , Hitakshi Modi , Andrew Well , Liu Leqi , Mia Markey , Ying Ding