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Each time-series has its own linear trend, the directionality of a timeseries, and removing the linear trend is crucial to get the more intuitive matching results. Supporting the linear detrending in subsequence matching is a challenging…

Databases · Computer Science 2015-05-19 Myeong-Seon Gil , Yang-Sae Moon , Bum-Soo Kim

Trajectory classification tasks became more complex as large volumes of mobility data are being generated every day and enriched with new sources of information, such as social networks and IoT sensors. Fast classification algorithms are…

Machine Learning · Computer Science 2021-02-10 Tarlis Portela , Jonata Tyska , Vania Bogorny

With the advent of large language models (LLMs), managing scientific literature via LLMs has become a promising direction of research. However, existing approaches often overlook the rich structural and semantic relevance among scientific…

Social and Information Networks · Computer Science 2025-12-19 Jiasheng Zhang , Jialin Chen , Ali Maatouk , Ngoc Bui , Qianqian Xie , Leandros Tassiulas , Jie Shao , Hua Xu , Rex Ying

Discovering the governing equations of dynamical systems is a central problem across many scientific disciplines. As experimental data become increasingly available, automated equation discovery methods offer a promising data-driven…

Machine Learning · Computer Science 2026-04-07 Amirmohammad Ziaei Bideh , Jonathan Gryak

An emerging topic in large language models (LLMs) is their application to time series forecasting, characterizing mainstream and patternable characteristics of time series. A relevant but rarely explored and more challenging question is…

Machine Learning · Computer Science 2024-08-08 Manqing Dong , Hao Huang , Longbing Cao

We present a novel method for hierarchical topic detection where topics are obtained by clustering documents in multiple ways. Specifically, we model document collections using a class of graphical models called hierarchical latent tree…

Computation and Language · Computer Science 2016-12-22 Peixian Chen , Nevin L. Zhang , Tengfei Liu , Leonard K. M. Poon , Zhourong Chen , Farhan Khawar

Change detection in multivariate time series has applications in many domains, including health care and network monitoring. A common approach to detect changes is to compare the divergence between the distributions of a reference window…

Machine Learning · Statistics 2015-11-12 Hoang-Vu Nguyen , Jilles Vreeken

Topic modelling, as a well-established unsupervised technique, has found extensive use in automatically detecting significant topics within a corpus of documents. However, classic topic modelling approaches (e.g., LDA) have certain…

Computation and Language · Computer Science 2024-03-27 Yida Mu , Chun Dong , Kalina Bontcheva , Xingyi Song

The discovery of patterns that accurately discriminate one class label from another remains a challenging data mining task. Subgroup discovery (SD) is one of the frameworks that enables to elicit such interesting hypotheses from labeled…

Data Structures and Algorithms · Computer Science 2017-12-07 Guillaume Bosc , Jean-François Boulicaut , Chedy Raïssi , Mehdi Kaytoue

Time Series Motif Discovery (TSMD), which aims at finding recurring patterns in time series, is an important task in numerous application domains, and many methods for this task exist. These methods are usually evaluated qualitatively. A…

Machine Learning · Computer Science 2024-12-13 Daan Van Wesenbeeck , Aras Yurtman , Wannes Meert , Hendrik Blockeel

Finding a template in a search image is one of the core problems many computer vision, such as semantic image semantic, image-to-GPS verification \etc. We propose a novel quality-aware template matching method, QATM, which is not only used…

Computer Vision and Pattern Recognition · Computer Science 2019-04-11 Jiaxin Cheng , Yue Wu , Wael Abd-Almageed , Premkumar Natarajan

Time series prediction is of great significance in many applications and has attracted extensive attention from the data mining community. Existing work suggests that for many problems, the shape in the current time series may correlate an…

Artificial Intelligence · Computer Science 2017-12-05 Yuanduo He , Xu Chu , Juguang Peng , Jingyue Gao , Yasha Wang

Detecting repeated variable-length patterns, also called variable-length motifs, has received a great amount of attention in recent years. Current state-of-the-art algorithm utilizes fixed-length motif discovery algorithm as a subroutine to…

Data Structures and Algorithms · Computer Science 2018-02-15 Yifeng Gao , Jessica Lin

The scientific reasoning ability of large language models (LLMs) has recently attracted significant attention. Time series, as a fundamental modality in scientific data, presents unique challenges that are often overlooked in current…

Metaphor detection, a critical task in natural language processing, involves identifying whether a particular word in a sentence is used metaphorically. Traditional approaches often rely on supervised learning models that implicitly encode…

Computation and Language · Computer Science 2024-12-30 Yujie Lin , Jingyao Liu , Yan Gao , Ante Wang , Jinsong Su

Network motif provides a way to uncover the basic building blocks of most complex networks. This task usually demands high computer processing, specially for motif with 5 or more vertices. This paper presents an extended methodology with…

Data Structures and Algorithms · Computer Science 2018-04-27 Luis A. A. Meira , Vinícius R. Máximo , Alvaro L. Fazenda , Arlindo F. da Conceição

Calculating semantic textual similarity is a foundational task in natural language processing. Current large language models (LLMs) based methods typically rely on extracting last-layer hidden states with fixed dimensions to compute…

Computation and Language · Computer Science 2026-05-29 Kaijie Zheng , Weiqin Wang , Yile Wang , Hui Huang

Large Vision Language Models (LVLMs) have shown remarkable capabilities in multimodal tasks like visual question answering or image captioning. However, inconsistencies between the visual information and the generated text, a phenomenon…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Laura Fieback , Jakob Spiegelberg , Hanno Gottschalk

Understanding and distinguishing temporal patterns in time series data is essential for scientific discovery and decision-making. For example, in biomedical research, uncovering meaningful patterns in physiological signals can improve…

Machine Learning · Computer Science 2025-12-16 Yu-Chia Huang , Juntong Chen , Dongyu Liu , Kwan-Liu Ma

Comprehensive understanding of time series remains a significant challenge for Large Language Models (LLMs). Current research is hindered by fragmented task definitions and benchmarks with inherent ambiguities, precluding rigorous…

Artificial Intelligence · Computer Science 2026-04-21 Yueyang Ding , HaoPeng Zhang , Rui Dai , Yi Wang , Tianyu Zong , Kaikui Liu , Xiangxiang Chu