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Upsurging abnormal activities in crowded locations such as airports, train stations, bus stops, shopping malls, etc., urges the necessity for an intelligent surveillance system. An intelligent surveillance system can differentiate between…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Shahriar Jahan , Roknuzzaman , Md Robiul Islam

Supervised Learning is a way of developing Artificial Intelligence systems in which a computer algorithm is trained on labeled data inputs. Effectiveness of a Supervised Learning algorithm is determined by its performance on a given dataset…

Computers and Society · Computer Science 2024-10-29 Shubhi Bansal , Atharva Tendulkar , Nagendra Kumar

Human activity recognition (HAR) based on multimodal sensors has become a rapidly growing branch of biometric recognition and artificial intelligence. However, how to fully mine multimodal time series data and effectively learn accurate…

Computer Vision and Pattern Recognition · Computer Science 2022-05-25 Jialiang Wang , Haotian Wei , Yi Wang , Shu Yang , Chi Li

Human activity recognition using deep learning techniques has become increasing popular because of its high effectivity with recognizing complex tasks, as well as being relatively low in costs compared to more traditional machine learning…

Computer Vision and Pattern Recognition · Computer Science 2022-04-29 Wei Zhong Tee , Rushit Dave , Naeem Seliya , Mounika Vanamala

Recent curriculum reinforcement learning for large language models (LLMs) typically rely on difficulty-based annotations for data filtering and ordering. However, such methods suffer from local optimization, where continual training on…

Machine Learning · Computer Science 2025-10-01 Ming Yang , Xiaofan Li , Zhiyuan Ma , Dengliang Shi , Jintao Du , Yu Cheng , Weiguo Zheng

Wearables are fundamental to improving our understanding of human activities, especially for an increasing number of healthcare applications from rehabilitation to fine-grained gait analysis. Although our collective know-how to solve Human…

Machine Learning · Computer Science 2020-07-15 Alireza Abedin , Mahsa Ehsanpour , Qinfeng Shi , Hamid Rezatofighi , Damith C. Ranasinghe

Deep learning based approaches have achieved significant progresses in different tasks like classification, detection, segmentation, and so on. Ensemble learning is widely known to further improve performance by combining multiple…

Computer Vision and Pattern Recognition · Computer Science 2019-05-17 Danlu Chen , Xu-Yao Zhang , Wei Zhang , Yao Lu , Xiuli Li , Tao Mei

Wearable-based Human Activity Recognition (HAR) is a key task in human-centric machine learning due to its fundamental understanding of human behaviours. Due to the dynamic nature of human behaviours, continual learning promises HAR systems…

Machine Learning · Computer Science 2024-01-05 Chi Ian Tang , Lorena Qendro , Dimitris Spathis , Fahim Kawsar , Akhil Mathur , Cecilia Mascolo

Deep Neural Networks (DNNs) are prone to overfitting and hence have high variance. Overfitted networks do not perform well for a new data instance. So instead of using a single DNN as classifier we propose an ensemble of seven independent…

Machine Learning · Computer Science 2021-05-11 Anmol Jain , Aishwary Kumar , Seba Susan

Anatomical movements of the human body can change the channel state information (CSI) of wireless signals in an indoor environment. These changes in the CSI signals can be used for human activity recognition (HAR), which is a predominant…

Human-Computer Interaction · Computer Science 2022-05-04 Hojjat Salehinejad , Shahrokh Valaee

This paper presents a novel hybrid deep learning framework designed to enhance the robustness of CSI-based Human Activity Recognition (HAR) within bandwidth-constrained Wi-Fi sensing environments. The core of our proposed methodology is a…

Signal Processing · Electrical Eng. & Systems 2026-02-10 Alison M. Fernandes , Hermes I. Del Monego , Bruno S. Chang , Anelise Munaretto , Hélder M. Fontes , Rui Campos

Supervised Deep Learning (DL) models are currently the leading approach for sensor-based Human Activity Recognition (HAR) on wearable and mobile devices. However, training them requires large amounts of labeled data whose collection is…

Machine Learning · Computer Science 2023-04-20 Luca Arrotta , Gabriele Civitarese , Samuele Valente , Claudio Bettini

Motion sensors integrated into wearable and mobile devices provide valuable information about the device users. Machine learning and, recently, deep learning techniques have been used to characterize sensor data. Mostly, a single task, such…

Machine Learning · Computer Science 2023-11-15 Egemen İşgüder , Özlem Durmaz İncel

Extreme learning machine (ELM) as a neural network algorithm has shown its good performance, such as fast speed, simple structure etc, but also, weak robustness is an unavoidable defect in original ELM for blended data. We present a new…

Machine Learning · Computer Science 2014-09-24 Bo Han , Bo He , Rui Nian , Mengmeng Ma , Shujing Zhang , Minghui Li , Amaury Lendasse

Cross-dataset Human Activity Recognition (HAR) suffers from limited model generalization, hindering its practical deployment. To address this critical challenge, inspired by the success of DoReMi in Large Language Models (LLMs), we…

Machine Learning · Computer Science 2025-03-19 Lulu Ban , Tao Zhu , Xiangqing Lu , Qi Qiu , Wenyong Han , Shuangjian Li , Liming Chen , Kevin I-Kai Wang , Mingxing Nie , Yaping Wan

Deep neural networks are in the limelight of machine learning with their excellent performance in many data-driven applications. However, they can lead to inaccurate predictions when queried in out-of-distribution data points, which can…

Machine Learning · Computer Science 2023-03-01 Yana Stoyanova , Soroush Ghandi , Maryam Tavakol

Human Activity Recognition (HAR) plays a critical role in a wide range of real-world applications, and it is traditionally achieved via wearable sensing. Recently, to avoid the burden and discomfort caused by wearable devices, device-free…

Networking and Internet Architecture · Computer Science 2021-10-29 Zhe Chen , Chao Cai , Tianyue Zheng , Jun Luo , Jie Xiong , Xin Wang

Ambient sensor-based human activity recognition (HAR) in smart homes remains challenging due to the need for real-time inference, spatially grounded reasoning, and context-aware temporal modeling. Existing approaches often rely on…

Machine Learning · Computer Science 2025-11-11 Zishuai Liu , Weihang You , Jin Lu , Fei Dou

Various health-care applications such as assisted living, fall detection, etc., require modeling of user behavior through Human Activity Recognition (HAR). Such applications demand characterization of insights from multiple…

Machine Learning · Computer Science 2020-12-07 Gautham Krishna Gudur , Satheesh K. Perepu

Generalizable protein function prediction is increasingly constrained by the growing mismatch between exponentially expanding sequences of environmental proteins and the comparatively slow accumulation of experimentally verified functional…

Quantitative Methods · Quantitative Biology 2026-02-27 Ashley Babjac , Adrienne Hoarfrost