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Spatiotemporal neural networks have shown great promise in urban scenarios by effectively capturing temporal and spatial correlations. However, urban environments are constantly evolving, and current model evaluations are often limited to…

机器学习 · 计算机科学 2024-10-10 Hongjun Wang , Jiyuan Chen , Tong Pan , Zheng Dong , Lingyu Zhang , Renhe Jiang , Xuan Song

Human activity recognition (HAR) with wearables is one of the serviceable technologies in ubiquitous and mobile computing applications. The sliding-window scheme is widely adopted while suffering from the multi-class windows problem. As a…

计算机视觉与模式识别 · 计算机科学 2023-10-16 Songpengcheng Xia , Lei Chu , Ling Pei , Jiarui Yang , Wenxian Yu , Robert C. Qiu

Activity recognition using built-in sensors in smart and wearable devices provides great opportunities to understand and detect human behavior in the wild and gives a more holistic view of individuals' health and well being. Numerous…

信号处理 · 电气工程与系统科学 2020-11-16 Mehrdad Fazli , Kamran Kowsari , Erfaneh Gharavi , Laura Barnes , Afsaneh Doryab

Wearable computing and context awareness are the focuses of study in the field of artificial intelligence recently. One of the most appealing as well as challenging applications is the Human Activity Recognition (HAR) utilizing smart…

机器学习 · 计算机科学 2018-10-26 Mingtao Dong , Jindong Han

Out-of-distribution (OOD) detection is the task of identifying inputs that deviate from the training data distribution. This capability is essential for safely deploying deep computer vision models in open-world environments. In this work,…

计算机视觉与模式识别 · 计算机科学 2025-03-25 Wenxi Chen , Raymond A. Yeh , Shaoshuai Mou , Yan Gu

Out-of-distribution (OOD) detection is essential for determining when a supervised model encounters inputs that differ meaningfully from its training distribution. While widely studied in classification, OOD detection for regression and…

机器学习 · 统计学 2025-12-16 Min Lu , Hemant Ishwaran

Detecting out-of-distribution (OOD) data is a critical challenge in machine learning due to model overconfidence, often without awareness of their epistemological limits. We hypothesize that ``neural collapse'', a phenomenon affecting…

There has been much recent research on human activity re\-cog\-ni\-tion (HAR), due to the proliferation of wearable sensors in watches and phones, and the advances of deep learning methods, which avoid the need to manually extract features…

机器学习 · 计算机科学 2022-09-20 Louis Mahon , Thomas Lukasiewicz

Query-driven learned estimators are accurate, flexible, and lightweight alternatives to traditional estimators in query optimization. However, existing query-driven approaches struggle with the Out-of-distribution (OOD) problem, where the…

数据库 · 计算机科学 2024-12-10 Rui Li , Kangfei Zhao , Jeffrey Xu Yu , Guoren Wang

Applying machine learning to increasingly high-dimensional problems with sparse or biased training data increases the risk that a model is used on inputs outside its training domain. For such out-of-distribution (OOD) inputs, the model can…

机器学习 · 计算机科学 2025-03-10 Juniper Tyree , Andreas Rupp , Petri S. Clusius , Michael H. Boy

Recent years have witnessed the rapid development of human activity recognition (HAR) based on wearable sensor data. One can find many practical applications in this area, especially in the field of health care. Many machine learning…

机器学习 · 计算机科学 2019-05-16 H. D. Nguyen , K. P. Tran , X. Zeng , L. Koehl , G. Tartare

Out-of-distribution (OOD) detection is crucial for the deployment of machine learning models in the open world. While existing OOD detectors are effective in identifying OOD samples that deviate significantly from in-distribution (ID) data,…

机器学习 · 计算机科学 2024-12-10 Hao Fu , Prashanth Krishnamurthy , Siddharth Garg , Farshad Khorrami

Detecting human presence indoors with millimeter-wave frequency-modulated continuous-wave (FMCW) radar faces challenges from both moving and stationary clutter. This work proposes a robust and real-time capable human presence and…

信号处理 · 电气工程与系统科学 2024-03-28 Sabri Mustafa Kahya , Muhammet Sami Yavuz , Eckehard Steinbach

Most recent work on vision-based human activity recognition (HAR) focuses on designing complex deep learning models for the task. In so doing, there is a requirement for large datasets to be collected. As acquiring and processing large…

计算机视觉与模式识别 · 计算机科学 2020-04-30 Bruce X. B. Yu , Yan Liu , Keith C. C. Chan

The safe deployment of machine learning and AI models in open-world settings hinges critically on the ability to detect out-of-distribution (OOD) data accurately, data samples that contrast vastly from what the model was trained with.…

机器学习 · 计算机科学 2025-05-23 Andrija Djurisic , Rosanne Liu , Mladen Nikolic

Human Activity Recognition (HAR) using on-body devices identifies specific human actions in unconstrained environments. HAR is challenging due to the inter and intra-variance of human movements; moreover, annotated datasets from on-body…

计算机视觉与模式识别 · 计算机科学 2022-12-05 Shrutarv Awasthi , Fernando Moya Rueda , Gernot A. Fink

In neuroscience, identifying distinct patterns linked to neurological disorders, such as Alzheimer's and Autism, is critical for early diagnosis and effective intervention. Graph Neural Networks (GNNs) have shown promising in analyzing…

机器学习 · 计算机科学 2025-02-05 Jiaxing Xu , Yongqiang Chen , Xia Dong , Mengcheng Lan , Tiancheng Huang , Qingtian Bian , James Cheng , Yiping Ke

Human Activity Recognition (HAR) is one of the central problems in fields such as healthcare, elderly care, and security at home. However, traditional HAR approaches face challenges including data scarcity, difficulties in model…

计算机视觉与模式识别 · 计算机科学 2024-07-16 Xi Chen , Julien Cumin , Fano Ramparany , Dominique Vaufreydaz

Out-of-distribution (OOD) generalization is critical for machine learning models deployed in the real world. However, achieving this can be fundamentally challenging, as it requires the ability to learn invariant features across different…

机器学习 · 计算机科学 2024-11-05 Haoyue Bai , Yifei Ming , Julian Katz-Samuels , Yixuan Li

Human Activity Recognition (HAR) using wearable sensor data has become a central task in mobile computing, healthcare, and human-computer interaction. Despite the success of traditional deep learning models such as CNNs and RNNs, they often…

机器学习 · 计算机科学 2025-05-27 Yunbo Liu , Xukui Qin , Yifan Gao , Xiang Li , Chengwei Feng