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Temporally indexed data are essential in a wide range of fields and of interest to machine learning researchers. Time series data, however, are often scarce or highly sensitive, which precludes the sharing of data between researchers and…

机器学习 · 计算机科学 2024-07-10 Alexander Nikitin , Letizia Iannucci , Samuel Kaski

SDForger is a flexible and efficient framework for generating high-quality multivariate time series using LLMs. Leveraging a compact data representation, SDForger provides synthetic time series generation from a few samples and…

Test-time scaling improves the reasoning capabilities of large language models (LLMs) by allocating extra compute to generate longer Chains-of-Thoughts (CoTs). This enables models to tackle more complex problem by breaking them down into…

人工智能 · 计算机科学 2026-03-03 Adel Javanmard , Baharan Mirzasoleiman , Vahab Mirrokni

Recent years have witnessed a growing interest for time series foundation models, with a strong emphasis on the forecasting task. Yet, the crucial task of out-of-domain imputation of missing values remains largely underexplored. We propose…

机器学习 · 计算机科学 2025-11-11 Etienne Le Naour , Tahar Nabil , Ghislain Agoua

A State Space Model (SSM) is a foundation model in time series analysis, which has recently been shown as an alternative to transformers in sequence modeling. In this paper, we theoretically study the generalization of SSMs and propose…

机器学习 · 计算机科学 2024-05-07 Fusheng Liu , Qianxiao Li

Although pre-trained transformers and reprogrammed text-based LLMs have shown strong performance on time series tasks, the best-performing architectures vary widely across tasks, with most models narrowly focused on specific areas, such as…

机器学习 · 计算机科学 2024-11-27 Shanghua Gao , Teddy Koker , Owen Queen , Thomas Hartvigsen , Theodoros Tsiligkaridis , Marinka Zitnik

Transformer-based architectures dominate time series modeling by enabling global attention over all timestamps, yet their rigid 'one-size-fits-all' context aggregation fails to address two critical challenges in real-world data: (1)…

机器学习 · 计算机科学 2025-09-30 Xiaowen Ma , Shuning Ge , Fan Yang , Xiangyu Li , Yun Chen , Mengting Ma , Wei Zhang , Zhipeng Liu

Particle accelerators are complex facilities that produce large amounts of structured data and have clear optimization goals as well as precisely defined control requirements. As such they are naturally amenable to data-driven research…

加速器物理 · 物理学 2023-03-01 Sichen Li , Andreas Adelmann

Real-world time series come with text: metadata, descriptions, news, reports. Yet time series foundation models process numerical sequences in isolation, and the multimodal text-and-time-series models that attempt to bridge the two all…

机器学习 · 计算机科学 2026-05-21 Paul Quinlan , Jeremy Levasseur , Qingguo Li , Xiaodan Zhu

Modern sequential recommender systems, ranging from lightweight transformer-based variants to large language models, have become increasingly prominent in academia and industry due to their strong performance in the next-item prediction…

信息检索 · 计算机科学 2025-08-11 Danil Gusak , Anna Volodkevich , Anton Klenitskiy , Alexey Vasilev , Evgeny Frolov

Spatio-temporal forecasting plays a crucial role in various sectors such as transportation systems, logistics, and supply chain management. However, existing methods are limited by their ability to handle large, complex datasets. To…

机器学习 · 计算机科学 2024-08-27 Sakhinana Sagar Srinivas , Chidaksh Ravuru , Geethan Sannidhi , Venkataramana Runkana

Effective imputation is a crucial preprocessing step for time series analysis. Despite the development of numerous deep learning algorithms for time series imputation, the community lacks standardized and comprehensive benchmark platforms…

Symbolic encoding has been used in multi-operator learning as a way to embed additional information for distinct time-series data. For spatiotemporal systems described by time-dependent partial differential equations, the equation itself…

机器学习 · 计算机科学 2024-09-19 Derek Jollie , Jingmin Sun , Zecheng Zhang , Hayden Schaeffer

Large reasoning models (LRMs) have exhibited the capacity of enhancing reasoning performance via internal test-time scaling. Building upon this, a promising direction is to further scale test-time compute to unlock even greater reasoning…

人工智能 · 计算机科学 2025-06-10 Jian Wang , Boyan Zhu , Chak Tou Leong , Yongqi Li , Wenjie Li

Conventional forecasting methods rely on unimodal time series data, limiting their ability to exploit rich textual information. Recently, large language models (LLMs) and time series foundation models (TSFMs) have demonstrated powerful…

机器学习 · 计算机科学 2025-05-16 Chengsen Wang , Qi Qi , Zhongwen Rao , Lujia Pan , Jingyu Wang , Jianxin Liao

Imputing missing values in multivariate time series remains challenging, especially under diverse missing patterns and heavy missingness. Existing methods suffer from suboptimal performance as corrupted temporal features hinder effective…

机器学习 · 计算机科学 2026-04-07 Dongik Park , Hyunwoo Ryu , Suahn Bae , Keondo Park , Hyung-Sin Kim

In contemporary data-driven environments, the generation and processing of multivariate time series data is an omnipresent challenge, often complicated by time delays between different time series. These delays, originating from a multitude…

机器学习 · 计算机科学 2024-08-26 Jiajie Wang , Zhiyuan Jerry Lin , Wen Chen

Accurate spatiotemporal pattern analysis is critical in fields such as urban traffic, meteorology, and public health monitoring. However, existing methods face performance bottlenecks, typically yielding only incremental gains and often…

机器学习 · 计算机科学 2026-05-20 Jing Chen , Shixiang Pan , Yujie Fan , Haocheng Ye , Haitao Xu , Wenqiang Xu

Time-Series Mining (TSM) is an important research area since it shows great potential in practical applications. Deep learning models that rely on massive labeled data have been utilized for TSM successfully. However, constructing a…

机器学习 · 计算机科学 2024-10-07 Qianli Ma , Zhen Liu , Zhenjing Zheng , Ziyang Huang , Siying Zhu , Zhongzhong Yu , James T. Kwok

Time series forecasting remains a critical challenge across various domains, often complicated by high-dimensional data and long-term dependencies. This paper presents a novel transformer architecture for time series forecasting,…

机器学习 · 计算机科学 2025-02-12 Yanlong Wang , Jian Xu , Fei Ma , Shao-Lun Huang , Danny Dongning Sun , Xiao-Ping Zhang
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