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Data augmentation methods in combination with deep neural networks have been used extensively in computer vision on classification tasks, achieving great success; however, their use in time series classification is still at an early stage.…

Statistical Finance · Quantitative Finance 2020-10-29 Elizabeth Fons , Paula Dawson , Xiao-jun Zeng , John Keane , Alexandros Iosifidis

Due to the data shortage problem, which is one of the major problems in the field of machine learning, the accuracy level of many applications remains well below the expected. It prevents researchers from producing new artificial…

Signal Processing · Electrical Eng. & Systems 2023-02-28 Okan Düzyel , Mehmet Kuntalp

One of the frontier issues that severely hamper the development of automatic snore sound classification (ASSC) associates to the lack of sufficient supervised training data. To cope with this problem, we propose a novel data augmentation…

Machine Learning · Computer Science 2019-04-01 Zixing Zhang , Jing Han , Kun Qian , Christoph Janott , Yanan Guo , Bjoern Schuller

This paper investigates methods for improving generative data augmentation for deep learning. Generative data augmentation leverages the synthetic samples produced by generative models as an additional dataset for classification with small…

Machine Learning · Computer Science 2023-10-24 Shin'ya Yamaguchi , Daiki Chijiwa , Sekitoshi Kanai , Atsutoshi Kumagai , Hisashi Kashima

The Cloud paradigm is at a critical point in which the existing energy-efficiency techniques are reaching a plateau, while the computing resources demand at Data Center facilities continues to increase exponentially. The main challenge in…

Machine Learning · Computer Science 2023-06-19 Jaime Pérez , Patricia Arroba , José M. Moya

A hybrid two-stage machine learning architecture that addresses the problem of excessive false positives (false alarms) in solar flare prediction systems is investigated. The first stage is a convolutional neural network (CNN) model based…

Solar and Stellar Astrophysics · Physics 2022-05-09 Varad Deshmukh , Natasha Flyer , Kiera Van Der Sande , Thomas Berger

Machine learning (ML) methods are becoming popular tools for the prediction and design of novel materials. In particular, neural network (NN) is a promising ML method, which can be used to identify hidden trends in the data. However, these…

Over the past few decades, many applications of physics-based simulations and data-driven techniques (including machine learning and deep learning) have emerged to analyze and predict solar flares. These approaches are pivotal in…

Solar and Stellar Astrophysics · Physics 2024-02-07 Anli Ji , Berkay Aydin

In heliophysics research, predicting solar flares is crucial due to their potential to impact both space-based systems and Earth's infrastructure substantially. Magnetic field data from solar active regions, recorded by solar imaging…

Machine Learning · Computer Science 2024-11-19 Onur Vural , Shah Muhammad Hamdi , Soukaina Filali Boubrahimi

This paper introduces Structured Noise Space GAN (SNS-GAN), a novel approach in the field of generative modeling specifically tailored for class-conditional generation in both image and time series data. It addresses the challenge of…

Machine Learning · Computer Science 2023-12-21 Hamidreza Gholamrezaei , Alireza Koochali , Andreas Dengel , Sheraz Ahmed

It is important to predict how the Global Mean Temperature (GMT) will evolve in the next few decades. The ability to predict historical data is a necessary first step toward the actual goal of making long-range forecasts. This paper…

Applications · Statistics 2023-03-14 Debdarsan Niyogi , J. Srinivasan

Time Series Classification (TSC) has drawn a lot of attention in literature because of its broad range of applications for different domains, such as medical data mining, weather forecasting. Although TSC algorithms are designed for…

Machine Learning · Computer Science 2021-10-12 Syed Rawshon Jamil

Generative data augmentation, which scales datasets by obtaining fake labeled examples from a trained conditional generative model, boosts classification performance in various learning tasks including (semi-)supervised learning, few-shot…

Machine Learning · Computer Science 2023-05-30 Chenyu Zheng , Guoqiang Wu , Chongxuan Li

Traditional data cleaning identifies dirty data by classifying original data sequences, which is a class$-$imbalanced problem since the proportion of incorrect data is much less than the proportion of correct ones for most diagnostic…

Machine Learning · Computer Science 2017-10-25 Jian Liu , Ting Lan , Hong Qin

Data augmentation is a technique to improve the generalization ability of machine learning methods by increasing the size of the dataset. However, since every augmentation method is not equally effective for every dataset, you need to…

Machine Learning · Computer Science 2022-05-31 Daisuke Oba , Shinnosuke Matsuo , Brian Kenji Iwana

In recent years, neural networks achieved much success in various applications. The main challenge in training deep neural networks is the lack of sufficient data to improve the model's generalization and avoid overfitting. One of the…

Machine Learning · Computer Science 2021-08-24 Mohammad Akyash , Hoda Mohammadzade , Hamid Behroozi

Deep learning has recently been applied to automatically classify the modulation categories of received radio signals without manual experience. However, training deep learning models requires massive volume of data. An insufficient…

Signal Processing · Electrical Eng. & Systems 2019-12-11 Liang Huang , Weijian Pan , You Zhang , LiPing Qian , Nan Gao , Yuan Wu

Effective training of neural networks requires much data. In the low-data regime, parameters are underdetermined, and learnt networks generalise poorly. Data Augmentation alleviates this by using existing data more effectively. However…

Machine Learning · Statistics 2018-03-23 Antreas Antoniou , Amos Storkey , Harrison Edwards

Solar flare forecasting research using machine learning (ML) has focused on high resolution magnetogram data from the SDO/HMI era covering Solar Cycle 24 and the start of Solar Cycle 25, with some efforts looking back to SOHO/MDI for data…

Solar and Stellar Astrophysics · Physics 2023-08-30 Kiera van der Sande , Andrés Muñoz-Jaramillo , Subhamoy Chatterjee

Solar flares not only pose risks to outer space technologies and astronauts' well being, but also cause disruptions on earth to our hight-tech, interconnected infrastructure our lives highly depend on. While a number of machine-learning…

Machine Learning · Computer Science 2022-06-16 Junzhi Wen , Md Reazul Islam , Azim Ahmadzadeh , Rafal A. Angryk