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Fermi Gamma-ray Space Telescope has detected a diverse range of gamma-ray transients since its launch in 2008. Over the years, Fermi has accumulated an extensive public archive of transient events. Traditional classification methods for…

高能天体物理现象 · 物理学 2026-03-31 Arpan Aryam John , Krushna Govind Shete , Shabnam Iyyani , Saptarshi Bej

A novel application of machine-learning (ML) based image processing algorithms is proposed to analyze an all-sky map (ASM) obtained using the Fermi Gamma-ray Space Telescope. An attempt was made to simulate a one-year ASM from a…

高能天体物理现象 · 物理学 2021-06-02 Shogo Sato , Jun Kataoka , Soichiro Ito , Jun'ichi Kotoku , Masato Taki , Asuka Oyama , Takaya Toyoda , Yuki Nakamura , Marino Yamamoto

Automating the detection of anomalous events within long video sequences is challenging due to the ambiguity of how such events are defined. We approach the problem by learning generative models that can identify anomalies in videos using…

计算机视觉与模式识别 · 计算机科学 2016-12-16 Jefferson Ryan Medel , Andreas Savakis

Blazars are active galactic nuclei with relativistic jets pointed almost directly at Earth. Blazars are characterized by strong, apparently stochastic flux variability at virtually all observed wavelengths and timescales, from minutes to…

高能天体物理现象 · 物理学 2023-02-16 Aryeh Brill

We reconstruct the extra-galactic gamma-ray source-count distribution, or $dN/dS$, of resolved and unresolved sources by adopting machine learning techniques. Specifically, we train a convolutional neural network on synthetic 2-dimensional…

宇宙学与河外天体物理 · 物理学 2024-05-16 Aurelio Amerio , Alessandro Cuoco , Nicolao Fornengo

We present a new method to interpret the $\gamma$-ray data of our inner Galaxy as measured by the Fermi Large Area Telescope (Fermi LAT). We train and test convolutional neural networks with simulated Fermi-LAT images based on models tuned…

高能天体物理现象 · 物理学 2018-05-29 Sascha Caron , Germán A. Gómez-Vargas , Luc Hendriks , Roberto Ruiz de Austri

The Large Area Telescope on the Fermi gamma-ray Space Telescope (FGST, ex-GLAST) provides unprecedented sensitivity for all-sky monitoring of gamma-ray activity. It is an adequate telescope to detect transient sources, since the observatory…

高能天体物理现象 · 物理学 2010-08-25 Sylvain Chaty

In this paper, we propose a novel method for video anomaly detection motivated by an existing architecture for sequence-to-sequence prediction and reconstruction using a spatio-temporal convolutional Long Short-Term Memory (convLSTM). As in…

计算机视觉与模式识别 · 计算机科学 2022-05-19 Hanh Thi Minh Tran , David Hogg

In the era of time-domain, multi-messenger astronomy, the detection of transient events on the high-energy electromagnetic sky has become more important than ever. Previous attempts to systematically search for onboard-untriggered events in…

天体物理仪器与方法 · 物理学 2022-09-21 F. Kunzweiler , B. Biltzinger , J. Greiner , J. M. Burgess

The recent advances in Gravitational-wave astronomy have greatly accelerated the study of Multimessenger astrophysics. There is a need for the development of fast and efficient algorithms to detect non-astrophysical transients and noises…

信号处理 · 电气工程与系统科学 2020-09-28 Rahul Nigam , Amit Mishra , Pranath Reddy

Over the past 16 years, the Fermi Large Area Telescope (LAT) has significantly advanced our view of the GeV gamma-ray sky, yet several key questions remain - such as the composition of the isotropic gamma-ray background, the origin of the…

高能天体物理现象 · 物理学 2025-05-07 Christopher Eckner , Noemi Anau Montel , Florian List , Francesca Calore , Christoph Weniger

This work addresses the challenge of short-term precipitation forecasting by applying Convolutional Long Short-Term Memory (ConvLSTM) neural networks to weather radar data from the Royal Netherlands Meteorological Institute (KNMI). The…

机器学习 · 计算机科学 2023-12-05 Petros Demetrakopoulos

Anomaly detection in videos aims at reporting anything that does not conform the normal behaviour or distribution. However, due to the sparsity of abnormal video clips in real life, collecting annotated data for supervised learning is…

计算机视觉与模式识别 · 计算机科学 2019-10-22 Yiwei Lu , Mahesh Kumar Krishna Reddy , Seyed shahabeddin Nabavi , Yang Wang

A significant point-like component from the small scale (or discrete) structure in the H2 interstellar gas might be present in the Fermi-LAT data, but modeling this emission relies on observations of rare gas tracers only available in…

高能天体物理现象 · 物理学 2023-03-29 Alexander Shmakov , Mohammadamin Tavakoli , Pierre Baldi , Christopher M. Karwin , Alex Broughton , Simona Murgia

As a substantial amount of multivariate time series data is being produced by the complex systems in Smart Manufacturing, improved anomaly detection frameworks are needed to reduce the operational risks and the monitoring burden placed on…

机器学习 · 计算机科学 2022-01-25 Tareq Tayeh , Sulaiman Aburakhia , Ryan Myers , Abdallah Shami

Modern astronomical surveys deliver immense volumes of transient detections, yet distinguishing real astrophysical signals (for example, explosive events) from bogus imaging artefacts remains a challenge. Convolutional neural networks are…

天体物理仪器与方法 · 物理学 2025-10-09 Fiorenzo Stoppa , Turan Bulmus , Steven Bloemen , Stephen J. Smartt , Paul J. Groot , Paul Vreeswijk , Ken W. Smith

In this research paper, we study the capability of artificial neural network models to emulate storm surge based on the storm track/size/intensity history, leveraging a database of synthetic storm simulations. Traditionally, Computational…

机器学习 · 计算机科学 2022-04-21 Ehsan Adeli , Luning Sun , Jianxun Wang , Alexandros A. Taflanidis

Despite the growing number of gamma-ray sources detected by Fermi-LAT, about one third of the sources in each survey remains of uncertain type. We present a new deep neural network approach for the classification of unidentified or…

高能天体物理现象 · 物理学 2021-09-28 Thorben Finke , Michael Krämer , Silvia Manconi

Exploration of time domain is now a vibrant area of research in astronomy, driven by the advent of digital synoptic sky surveys. While panoramic surveys can detect variable or transient events, typically some follow-up observations are…

Effectively modeling long spatiotemporal sequences is challenging due to the need to model complex spatial correlations and long-range temporal dependencies simultaneously. ConvLSTMs attempt to address this by updating tensor-valued states…

机器学习 · 计算机科学 2023-10-31 Jimmy T. H. Smith , Shalini De Mello , Jan Kautz , Scott W. Linderman , Wonmin Byeon
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