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In the context of solving inverse problems for physics applications within a Bayesian framework, we present a new approach, Markov Chain Generative Adversarial Neural Networks (MCGANs), to alleviate the computational costs associated with…

Numerical Analysis · Mathematics 2022-09-08 Nikolaj T. Mücke , Benjamin Sanderse , Sander Bohté , Cornelis W. Oosterlee

Understanding the large-scale structure of the Universe and unravelling the mysteries of dark matter are fundamental challenges in contemporary cosmology. Reconstruction of the cosmological matter distribution from lensing observables,…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-25 Jessica Whitney , Tobías Liaudat , Matt Price , Matthijs Mars , Jason D. McEwen

Time-varying non-stationary channels, with complex dynamic variations and temporal evolution characteristics, have significant challenges in channel modeling and communication system performance evaluation. Most existing methods of…

Signal Processing · Electrical Eng. & Systems 2025-03-19 Keying Guo , Ruisi He , Mi Yang , Yuxin Zhang , Bo Ai , Haoxiang Zhang , Jiahui Han , Ruifeng Chen

Conditional generation of time-dependent data is a task that has much interest, whether for data augmentation, scenario simulation, completing missing data, or other purposes. Recent works proposed a Transformer-based Time series generative…

Machine Learning · Computer Science 2022-10-06 Abdellah Madane , Mohamed-djallel Dilmi , Florent Forest , Hanane Azzag , Mustapha Lebbah , Jerome Lacaille

We propose MAD-GAN, an intuitive generalization to the Generative Adversarial Networks (GANs) and its conditional variants to address the well known problem of mode collapse. First, MAD-GAN is a multi-agent GAN architecture incorporating…

Computer Vision and Pattern Recognition · Computer Science 2018-07-17 Arnab Ghosh , Viveka Kulharia , Vinay Namboodiri , Philip H. S. Torr , Puneet K. Dokania

Simulating complex physical systems often involves solving partial differential equations (PDEs) with some closures due to the presence of multi-scale physics that cannot be fully resolved. Therefore, reliable and accurate closure models…

Computational Physics · Physics 2020-02-19 Jin-Long Wu , Karthik Kashinath , Adrian Albert , Dragos Chirila , Prabhat , Heng Xiao

We consider the problem of training generative models with a Generative Adversarial Network (GAN). Although GANs can accurately model complex distributions, they are known to be difficult to train due to instabilities caused by a difficult…

Machine Learning · Computer Science 2017-06-13 Paulina Grnarova , Kfir Y. Levy , Aurelien Lucchi , Thomas Hofmann , Andreas Krause

From the ad network standpoint, a user's activity is a multi-type sequence of temporal events consisting of event types and time intervals. Understanding user patterns in ad networks has received increasing attention from the machine…

Machine Learning · Computer Science 2021-07-26 Lun Jiang , Nima Salehi Sadghiani , Zhuo Tao , Andrew Cohen

Traditional smart meters, which measure energy usage every 15 minutes or more and report it at least a few hours later, lack the granularity needed for real-time decision-making. To address this practical problem, we introduce a new method…

Signal Processing · Electrical Eng. & Systems 2024-09-04 Hritik Gopal Shah , Behrouz Azimian , Anamitra Pal

Implicit generative models have the capability to learn arbitrary complex data distributions. On the downside, training requires telling apart real data from artificially-generated ones using adversarial discriminators, leading to unstable…

Machine Learning · Computer Science 2024-02-27 José Manuel de Frutos , Pablo M. Olmos , Manuel A. Vázquez , Joaquín Míguez

Using deep learning to analyze mechanical stress distributions has been gaining interest with the demand for fast stress analysis methods. Deep learning approaches have achieved excellent outcomes when utilized to speed up stress…

Computer Vision and Pattern Recognition · Computer Science 2021-02-24 Haoliang Jiang , Zhenguo Nie , Roselyn Yeo , Amir Barati Farimani , Levent Burak Kara

A novel approach of training data augmentation and domain adaptation is presented to support machine learning applications for cognitive radio. Machine learning provides effective tools to automate cognitive radio functionalities by…

Networking and Internet Architecture · Computer Science 2018-04-04 Kemal Davaslioglu , Yalin E. Sagduyu

Conditional generative adversarial networks (cGAN) have led to large improvements in the task of conditional image generation, which lies at the heart of computer vision. The major focus so far has been on performance improvement, while…

Machine Learning · Computer Science 2019-03-14 Grigorios G. Chrysos , Jean Kossaifi , Stefanos Zafeiriou

Entity resolution targets at identifying records that represent the same real-world entity from one or more datasets. A major challenge in learning-based entity resolution is how to reduce the label cost for training. Due to the quadratic…

Machine Learning · Computer Science 2020-12-21 Jingyu Shao , Qing Wang , Asiri Wijesinghe , Erhard Rahm

Application of realism enhancement methods, particularly in real-time and resource-constrained settings, has been frustrated by the expense of existing methods. These achieve high quality results only at the cost of long runtimes and high…

Graphics · Computer Science 2023-06-08 Arturo Salmi , Szabolcs Cséfalvay , James Imber

Recently, generative machine-learning models have gained popularity in physics, driven by the goal of improving the efficiency of Markov chain Monte Carlo techniques and of exploring their potential in capturing experimental data…

Statistical Mechanics · Physics 2021-09-03 Japneet Singh , Vipul Arora , Vinay Gupta , Mathias S. Scheurer

In the years since Goodfellow et al. introduced Generative Adversarial Networks (GANs), there has been an explosion in the breadth and quality of generative model applications. Despite this work, GANs still have a long way to go before they…

Machine Learning · Computer Science 2020-04-14 Conor Lazarou

Generative adversarial networks (GANs) are one of the greatest advances in AI in recent years. With their ability to directly learn the probability distribution of data, and then sample synthetic realistic data. Many applications have…

The solution of probabilistic inverse problems for which the corresponding forward problem is constrained by physical principles is challenging. This is especially true if the dimension of the inferred vector is large and the prior…

Machine Learning · Statistics 2023-06-09 Deep Ray , Javier Murgoitio-Esandi , Agnimitra Dasgupta , Assad A. Oberai

In this paper, we propose a new framework for mitigating biases in machine learning systems. The problem of the existing mitigation approaches is that they are model-oriented in the sense that they focus on tuning the training algorithms to…

Machine Learning · Computer Science 2019-05-27 Adel Abusitta , Esma Aïmeur , Omar Abdel Wahab