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Humans learn adaptively and efficiently throughout their lives. However, incrementally learning tasks causes artificial neural networks to overwrite relevant information learned about older tasks, resulting in 'Catastrophic Forgetting'.…

Machine Learning · Computer Science 2021-02-04 Gobinda Saha , Isha Garg , Aayush Ankit , Kaushik Roy

Recently, convolutional neural networks (CNNs) have set latest state-of-the-art on various human activity recognition (HAR) datasets. However, deep CNNs often require more computing resources, which limits their applications in embedded…

Computer Vision and Pattern Recognition · Computer Science 2021-08-06 Yin Tang , Qi Teng , Lei Zhang , Fuhong Min , Jun He

Machine learning models for sensor-based human activity recognition (HAR) are expected to adapt post-deployment to recognize new activities and different ways of performing existing ones. To address this need, Online Continual Learning…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Yao Zhang , Souza Leite Clayton , Yu Xiao

Artificial intelligence is a key enabler for next-generation wireless communication and sensing. Yet, today's learning-based wireless techniques do not generalize well: most models are task-specific, environment-dependent, and limited to…

Signal Processing · Electrical Eng. & Systems 2026-02-05 Vahid Yazdnian , Yasaman Ghasempour

With the popularity and development of the wearable devices such as smartphones, human activity recognition (HAR) based on sensors has become as a key research area in human computer interaction and ubiquitous computing. The emergence of…

Signal Processing · Electrical Eng. & Systems 2024-10-30 Kun Wang , Jun He , Lei Zhang

Human activity recognition (HAR) by wearable sensor devices embedded in the Internet of things (IOT) can play a significant role in remote health monitoring and emergency notification, to provide healthcare of higher standards. The purpose…

Machine Learning · Computer Science 2022-01-24 M. Abid , A. Khabou , Y. Ouakrim , H. Watel , S. Chemkhi , A. Mitiche , A. Benazza-Benyahia , N. Mezghani

Sensor-based Human Activity Recognition (HAR) underpins many ubiquitous and wearable computing applications, yet current models remain limited by scarce labels, sensor heterogeneity, and weak generalization across users, devices, and…

Signal Processing · Electrical Eng. & Systems 2026-04-10 Sizhen Bian , Mengxi Liu , Lala Shakti Swarup Ray , Bo Zhou , Bin Guo , Zhiwen Yu , Thomas Ploetz , Paul Lukowicz , Siyu Yuan , Vitor Fortes Rey

Passive sensing techniques based on Wi-Fi signals have emerged as a promising technology in advanced wireless communication systems due to their widespread application and cost-effectiveness. However, the proliferation of low-cost Internet…

Systems and Control · Electrical Eng. & Systems 2023-11-13 Junshuo Liu , Fuhai Wang , Zhe Li , Rujing Xiong , Tiebin Mi , Robert Caiming Qiu

Continual learning is an emerging topic in the field of deep learning, where a model is expected to learn continuously for new upcoming tasks without forgetting previous experiences. This field has witnessed numerous advancements, but few…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Aupendu Kar , Krishnendu Ghosh , Prabir Kumar Biswas

While fulfilling communication tasks, wireless signals can also be used to sense the environment. Among various types of sensing media, WiFi signals offer advantages such as widespread availability, low hardware cost, and strong robustness…

Computer Vision and Pattern Recognition · Computer Science 2025-12-05 Ruijing Liu , Cunhua Pan , Jiaming Zeng , Hong Ren , Kezhi Wang , Lei Kong , Jiangzhou Wang

WiFi sensing has emerged as a compelling contactless modality for human activity monitoring by capturing fine-grained variations in Channel State Information (CSI). Its ability to operate continuously and non-intrusively while preserving…

Signal Processing · Electrical Eng. & Systems 2025-11-21 Guozhen Zhu , Yuqian Hu , Weihang Gao , Wei-Hsiang Wang , Beibei Wang , K. J. Ray Liu

Human Activity Recognition (HAR) has become a spotlight in recent scientific research because of its applications in various domains such as healthcare, athletic competitions, smart cities, and smart home. While researchers focus on the…

Signal Processing · Electrical Eng. & Systems 2023-05-18 Mohammadreza Heydarian , Thomas E. Doyle

Human Activity Recognition (HAR) is essential in ubiquitous computing, with far-reaching real-world applications. While recent SOTA HAR research has demonstrated impressive performance, some key aspects remain under-explored. Firstly, HAR…

Computer Vision and Pattern Recognition · Computer Science 2024-10-30 Wen Ge , Guanyi Mou , Emmanuel O. Agu , Kyumin Lee

Continual learning aims to learn new tasks without forgetting previously learned ones. We hypothesize that representations learned to solve each task in a sequence have a shared structure while containing some task-specific properties. We…

Machine Learning · Computer Science 2020-07-22 Sayna Ebrahimi , Franziska Meier , Roberto Calandra , Trevor Darrell , Marcus Rohrbach

Future wireless communication networks are expected to be smarter and more aware of their surroundings, enabling a wide range of context-aware applications. Reconfigurable intelligent surfaces (RISs) are set to play a critical role in…

Information Theory · Computer Science 2025-03-13 Yixuan Huang , Jie Yang , Chao-Kai Wen , Shi Jin

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

Combining different sensing modalities with multiple positions helps form a unified perception and understanding of complex situations such as human behavior. Hence, human activity recognition (HAR) benefits from combining redundant and…

Machine Learning · Computer Science 2024-04-26 Hymalai Bello

Continual learning is a promising machine learning paradigm to learn new tasks while retaining previously learned knowledge over streaming training data. Till now, rehearsal-based methods, keeping a small part of data from old tasks as a…

Machine Learning · Computer Science 2023-08-04 Quanziang Wang , Renzhen Wang , Yuexiang Li , Dong Wei , Kai Ma , Yefeng Zheng , Deyu Meng

Pervasive computing allows the provision of services in many important areas, including the relevant and dynamic field of health and well-being. In this domain, Human Activity Recognition (HAR) has gained a lot of attention in recent years.…

Artificial Intelligence · Computer Science 2023-04-27 Bonpagna Kann , Sandra Castellanos-Paez , Philippe Lalanda

The challenge in WiFi-based cross-domain Behavior Recognition lies in the significant interference of domain-specific signals on gesture variation. However, previous methods alleviate this interference by mapping the phase from multiple…

Computer Vision and Pattern Recognition · Computer Science 2025-12-17 Ruobei Zhang , Shengeng Tang , Huan Yan , Xiang Zhang , Jiabao Guo