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Time series classification (TSC) is the most import task in time series mining as it has several applications in medicine, meteorology, finance cyber security, and many others. With the ever increasing size of time series datasets, several…

机器学习 · 计算机科学 2023-12-12 Muhammad Marwan Muhammad Fuad

We present a simple, yet effective, approach to Semi-Supervised Learning. Our approach is based on estimating density-based distances (DBD) using a shortest path calculation on a graph. These Graph-DBD estimates can then be used in any…

机器学习 · 计算机科学 2012-02-20 Avleen S. Bijral , Nathan Ratliff , Nathan Srebro

Text-attributed graphs (TAGs) present unique challenges for direct processing by Language Learning Models (LLMs), yet their extensive commonsense knowledge and robust reasoning capabilities offer great promise for node classification in…

机器学习 · 计算机科学 2024-02-07 Rui Li , Jiwei Li , Jiawei Han , Guoyin Wang

Automated Human Activity Recognition has long been a problem of great interest in human-centered and ubiquitous computing. In the last years, a plethora of supervised learning algorithms based on deep neural networks has been suggested to…

计算机视觉与模式识别 · 计算机科学 2022-10-10 Bulat Khaertdinov , Stylianos Asteriadis

Multivariate time series (MTS) classification is widely applied in fields such as industry, healthcare, and finance, aiming to extract key features from complex time series data for accurate decision-making and prediction. However, existing…

机器学习 · 计算机科学 2025-06-19 Mingsen Du , Meng Chen , Yongjian Li , Cun Ji , Shoushui Wei

Semi-supervised semantic segmentation (SSSS) is vital in computational pathology, where dense annotations are costly and limited. Existing methods often rely on pixel-level consistency, which propagates noisy pseudo-labels and produces…

图像与视频处理 · 电气工程与系统科学 2025-11-14 Ha-Hieu Pham , Minh Le , Han Huynh , Nguyen Quoc Khanh Le , Huy-Hieu Pham

Asynchronous Time Series is a multivariate time series where all the channels are observed asynchronously-independently, making the time series extremely sparse when aligning them. We often observe this effect in applications with complex…

机器学习 · 计算机科学 2022-08-25 Vijaya Krishna Yalavarthi , Johannes Burchert , Lars Schmidt-Thieme

In the realm of time series analysis, accurately measuring similarity is crucial for applications such as forecasting, anomaly detection, and clustering. However, existing metrics often fail to capture the complex, multidimensional nature…

机器学习 · 计算机科学 2024-05-13 Yuhan Liu , Ke Tu

Time series data has been demonstrated to be crucial in various research fields. The management of large quantities of time series data presents challenges in terms of deep learning tasks, particularly for training a deep neural network.…

机器学习 · 计算机科学 2024-06-11 Zhanyu Liu , Ke Hao , Guanjie Zheng , Yanwei Yu

Conventional time series classification approaches based on bags of patterns or shapelets face significant challenges in dealing with a vast amount of feature candidates from high-dimensional multivariate data. In contrast, deep neural…

机器学习 · 计算机科学 2023-06-07 Raneen Younis , Abdul Hakmeh , Zahra Ahmadi

Similarity search on time series is a frequent operation in large-scale data-driven applications. Sophisticated similarity measures are standard for time series matching, as they are usually misaligned. Dynamic Time Warping or DTW is the…

信息检索 · 计算机科学 2016-10-25 Chen Luo , Anshumali Shrivastava

The nearest neighbor method together with the dynamic time warping (DTW) distance is one of the most popular approaches in time series classification. This method suffers from high storage and computation requirements for large training…

机器学习 · 计算机科学 2017-03-27 Brijnesh Jain , David Schultz

The ubiquity of sequences in many domains enhances significant recent interest in sequence learning, for which a basic problem is how to measure the distance between sequences. Dynamic time warping (DTW) aligns two sequences by nonlinear…

机器学习 · 计算机科学 2017-03-06 Zhichen Gong , Huanhuan Chen

Computing the discrepancy between time series of variable sizes is notoriously challenging. While dynamic time warping (DTW) is popularly used for this purpose, it is not differentiable everywhere and is known to lead to bad local optima…

机器学习 · 计算机科学 2021-03-01 Mathieu Blondel , Arthur Mensch , Jean-Philippe Vert

The Dynamic Time Warping (DTW) distance is a popular similarity measure for polygonal curves (i.e., sequences of points). It finds many theoretical and practical applications, especially for temporal data, and is known to be a robust,…

Despite the rapid progress on research in adversarial robustness of deep neural networks (DNNs), there is little principled work for the time-series domain. Since time-series data arises in diverse applications including mobile health,…

机器学习 · 计算机科学 2023-05-10 Taha Belkhouja , Yan Yan , Janardhan Rao Doppa

Most existing semi-supervised graph-based clustering methods exploit the supervisory information by either refining the affinity matrix or directly constraining the low-dimensional representations of data points. The affinity matrix…

机器学习 · 计算机科学 2022-09-07 Huaming Ling , Chenglong Bao , Xin Liang , Zuoqiang Shi

The recently proposed self-ensembling methods have achieved promising results in deep semi-supervised learning, which penalize inconsistent predictions of unlabeled data under different perturbations. However, they only consider adding…

机器学习 · 计算机科学 2018-03-29 Yucen Luo , Jun Zhu , Mengxi Li , Yong Ren , Bo Zhang

Time series classification(TSC) has always been an important and challenging research task. With the wide application of deep learning, more and more researchers use deep learning models to solve TSC problems. Since time series always…

机器学习 · 计算机科学 2021-01-27 Shibo Zhou , Yu Pan

Many smart grid applications involve data mining, clustering, classification, identification, and anomaly detection, among others. These applications primarily depend on the measurement of similarity, which is the distance between different…

信号处理 · 电气工程与系统科学 2025-10-20 Rui Yuan , Hossein Ranjbar , S. Ali Pourmousavi , Wen L. Soong , Andrew J. Black , Jon A. R. Liisberg , Julian Lemos-Vinasco