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In recent years, there has been a trend in the field of Reinforcement Learning (RL) towards large action models trained offline on large-scale datasets via sequence modeling. Existing models are primarily based on the Transformer…

Advances in deep learning for human activity recognition have been relatively limited due to the lack of large labelled datasets. In this study, we leverage self-supervised learning techniques on the UK-Biobank activity tracker dataset--the…

Signal Processing · Electrical Eng. & Systems 2024-06-21 Hang Yuan , Shing Chan , Andrew P. Creagh , Catherine Tong , Aidan Acquah , David A. Clifton , Aiden Doherty

The aim of this work is to investigate the use of Incrementally Input-to-State Stable ($\delta$ISS) deep Long Short Term Memory networks (LSTMs) for the identification of nonlinear dynamical systems. We show that suitable sufficient…

Systems and Control · Electrical Eng. & Systems 2024-10-28 Fabio Bonassi , Alessio La Bella , Giulio Panzani , Marcello Farina , Riccardo Scattolini

This paper looks into the technology classification problem for a distributed wireless spectrum sensing network. First, a new data-driven model for Automatic Modulation Classification (AMC) based on long short term memory (LSTM) is…

Networking and Internet Architecture · Computer Science 2018-07-12 Sreeraj Rajendran , Wannes Meert , Domenico Giustiniano , Vincent Lenders , Sofie Pollin

Most real-world datasets, and particularly those collected from physical systems, are full of noise, packet loss, and other imperfections. However, most specification mining, anomaly detection and other such algorithms assume, or even…

Machine Learning · Computer Science 2019-04-12 Ilia Sucholutsky , Apurva Narayan , Matthias Schonlau , Sebastian Fischmeister

Human Activity Recognition (HAR) has gained significant importance with the growing use of sensor-equipped devices and large datasets. This paper evaluates the performance of three categories of models : classical machine learning, deep…

Computer Vision and Pattern Recognition · Computer Science 2025-01-16 Md Meem Hossain , The Anh Han , Safina Showkat Ara , Zia Ush Shamszaman

Spatio-temporal contexts are crucial in understanding human actions in videos. Recent state-of-the-art Convolutional Neural Network (ConvNet) based action recognition systems frequently involve 3D spatio-temporal ConvNet filters, chunking…

Computer Vision and Pattern Recognition · Computer Science 2018-05-09 Yunfeng Wang , Wengang Zhou , Qilin Zhang , Xiaotian Zhu , Houqiang Li

In the recent years there has been a growing interest in techniques able to automatically recognize activities performed by people. This field is known as Human Activity recognition (HAR). HAR can be crucial in monitoring the wellbeing of…

Computer Vision and Pattern Recognition · Computer Science 2020-09-02 Anna Ferrari , Daniela Micucci , Marco Mobilio , Paolo Napoletano

Activity recognition computer vision algorithms can be used to detect the presence of autism-related behaviors, including what are termed "restricted and repetitive behaviors", or stimming, by diagnostic instruments. The limited data that…

Computer Vision and Pattern Recognition · Computer Science 2021-01-12 Peter Washington , Aaron Kline , Onur Cezmi Mutlu , Emilie Leblanc , Cathy Hou , Nate Stockham , Kelley Paskov , Brianna Chrisman , Dennis P. Wall

Deep neural networks have achieved great success in computer vision, speech recognition and many other areas. The potential of recurrent neural networks especially the Long Short-Term Memory (LSTM) for open set communication signal…

Signal Processing · Electrical Eng. & Systems 2020-02-28 Youwei Guo , Hongyu Jiang , Jing Wu , Jie Zhou

Recurrent Neural Networks (RNNs) with Long Short-Term Memory units (LSTM) are widely used because they are expressive and are easy to train. Our interest lies in empirically evaluating the expressiveness and the learnability of LSTMs in the…

Neural and Evolutionary Computing · Computer Science 2015-11-24 Wojciech Zaremba , Ilya Sutskever

Human activity recognition based on wearable sensor data has been an attractive research topic due to its application in areas such as healthcare and smart environments. In this context, many works have presented remarkable results using…

Computer Vision and Pattern Recognition · Computer Science 2019-02-04 Artur Jordao , Antonio C. Nazare , Jessica Sena , William Robson Schwartz

For decades, track association has been a challenging problem in marine surveillance, which involves the identification and association of vessel observations over time. However, the Automatic Identification System (AIS) has provided a new…

Machine Learning · Computer Science 2023-04-05 Md Asif Bin Syed , Imtiaz Ahmed

This paper presents the ARN-LSTM architecture, a novel multi-stream action recognition model designed to address the challenge of simultaneously capturing spatial motion and temporal dynamics in action sequences. Traditional methods often…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Chuanchuan Wang , Ahmad Sufril Azlan Mohmamed , Mohd Halim Bin Mohd Noor , Xiao Yang , Feifan Yi , Xiang Li

Humans are able to intuitively deduce actions that took place between two states in observations via deductive reasoning. This is because the brain operates on a bidirectional communication model, which has radically improved the accuracy…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Victor Adewopo , Nelly Elsayed , Kelly Anderson

Designing a scheme that can achieve a good performance in predicting single person activities and group activities is a challenging task. In this paper, we propose a novel robust and efficient human activity recognition scheme called ReHAR,…

Computer Vision and Pattern Recognition · Computer Science 2018-02-28 Xin Li , Mooi Choo Chuah

Deep operator networks (DeepONets, DONs) offer a distinct advantage over traditional neural networks in their ability to be trained on multi-resolution data. This property becomes especially relevant in real-world scenarios where…

Machine Learning · Computer Science 2023-10-05 Katarzyna Michałowska , Somdatta Goswami , George Em Karniadakis , Signe Riemer-Sørensen

Recent approaches in depth-based human activity analysis achieved outstanding performance and proved the effectiveness of 3D representation for classification of action classes. Currently available depth-based and RGB+D-based action…

Computer Vision and Pattern Recognition · Computer Science 2016-04-12 Amir Shahroudy , Jun Liu , Tian-Tsong Ng , Gang Wang

We propose the use of self-supervised learning for human activity recognition with smartphone accelerometer data. Our proposed solution consists of two steps. First, the representations of unlabeled input signals are learned by training a…

Signal Processing · Electrical Eng. & Systems 2021-09-03 Setareh Rahimi Taghanaki , Michael Rainbow , Ali Etemad

Human activity recognition based on video streams has received numerous attentions in recent years. Due to lack of depth information, RGB video based activity recognition performs poorly compared to RGB-D video based solutions. On the other…

Computer Vision and Pattern Recognition · Computer Science 2018-12-18 Krishanu Sarker , Mohamed Masoud , Saeid Belkasim , Shihao Ji
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