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Complex phenomena can be better understood when broken down into a limited number of simpler "components". Linear statistical methods such as the principal component analysis and its variants are widely used across various fields of applied…

数据分析、统计与概率 · 物理学 2025-01-13 Iacopo Tirelli , Miguel Alfonso Mendez , Andrea Ianiro , Stefano Discetti

In agricultural management, precise Ground Truth (GT) data is crucial for accurate Machine Learning (ML) based crop classification. Yet, issues like crop mislabeling and incorrect land identification are common. We propose a multi-level GT…

In this paper we present two examples of recent investigations that we have undertaken, applying Machine Learning (ML) neural networks (NN) to image datasets from outer planet missions to achieve feature recognition. Our first investigation…

In this paper we present results from the NEFOCAST project, funded by the Tuscany Region, aiming at detecting and estimating rainfall fields from the opportunistic use of the rain-induced excess attenuation incurred in the downlink channel…

信号处理 · 电气工程与系统科学 2019-07-25 Filippo Giannetti , Marco Moretti , Ruggero Reggiannini , Attilio Vaccaro

In climate science, we often want to compare across different datasets. Difficulties can arise in doing this due to inevitable mismatches that arise between observational and reanalysis data, or even between different reanalyses. This…

机器学习 · 计算机科学 2024-06-24 Jack R. P. Hanslope , Laurence Aitchison

We present BLOBCAT, new source extraction software that utilises the flood fill algorithm to detect and catalogue blobs, or islands of pixels representing sources, in two-dimensional astronomical images. The software is designed to process…

天体物理仪器与方法 · 物理学 2015-06-05 Christopher A. Hales , Tara Murphy , James R. Curran , Enno Middelberg , Bryan M. Gaensler , Ray P. Norris

We present the first application of a new foreground removal pipeline to the current leading HI intensity mapping dataset, obtained by the Green Bank Telescope (GBT). We study the 15hr and 1hr field data of the GBT observations previously…

宇宙学与河外天体物理 · 物理学 2016-10-18 L. Wolz , C. Blake , F. B. Abdalla , C. M. Anderson , T. -C. Chang , Y. -C. Li , K. W. Masui , E. Switzer , U. -L. Pen , T. C. Voytek , J. Yadav

Lens flare is a common image artifact that can significantly degrade image quality and affect the performance of computer vision systems due to a strong light source pointing at the camera. This survey provides a comprehensive overview of…

图像与视频处理 · 电气工程与系统科学 2023-10-24 Yousef Kotp , Marwan Torki

In order to keep track of the operational state of power grid, the world's largest sensor systems, smart grid, was built by deploying hundreds of millions of smart meters. Such system makes it possible to discover and make quick response to…

机器学习 · 计算机科学 2019-07-10 Jiangteng Li , Fei Wang

According to the current standard model of Cosmology, matter in the Universe arranges itself along a network of filamentary structure. These filaments connect the main nodes of this so-called 'Cosmic Web', which are clusters of galaxies.…

宇宙学与河外天体物理 · 物理学 2015-06-16 Matteo Maturi , Julian Merten

A simple Gaussian size deconvolution method is routinely used to remove the blur of observed images caused by insufficient angular resolutions of existing telescopes, thereby to estimate the physical sizes of extracted sources and…

天体物理仪器与方法 · 物理学 2023-07-26 Alexander Men'shchikov

Snow is a highly complex medium composed of ice crystals of various shapes and sizes. Knowledge of its intrinsic optical properties such as the scattering and absorption coefficient is tantamount to radiative transfer models in climate…

仪器与探测器 · 物理学 2022-05-17 Markus Allgaier , Brian J. Smith

In this paper we continue to develop the m-mode formalism, a technique for efficient and optimal analysis of wide-field transit radio telescopes, targeted at 21 cm cosmology. We extend this formalism to give an accurate treatment of the…

宇宙学与河外天体物理 · 物理学 2015-04-16 J. Richard Shaw , Kris Sigurdson , Michael Sitwell , Albert Stebbins , Ue-Li Pen

Accurate measurements of atmospheric flows at meter-scale resolution are essential for a broad range of sustainability applications, including optimal design of wind and solar farms, safe and efficient urban air mobility, monitoring of…

流体动力学 · 物理学 2023-06-14 John O. Dabiri , Michael F. Howland , Matthew K. Fu , Roni H. Goldshmid

The ability to subtract foreground contamination from low-frequency observations is crucial to reveal the underlying 21 cm signal. The traditional line-of-sight methods can deal with the removal of diffuse emission and unresolved point…

宇宙学与河外天体物理 · 物理学 2015-05-30 Xiao-Chun Mao

We investigate the performance of distributed least-mean square (LMS) algorithms for parameter estimation over sensor networks where the regression data of each node are corrupted by white measurement noise. Under this condition, we show…

系统与控制 · 计算机科学 2016-11-18 Reza Abdolee , Benoit Champagne

Smoothing and filtering two-dimensional sequences are fundamental tasks in fields such as computer vision. Conventional filtering algorithms often rely on the selection of the filtering window, limiting their applicability in certain…

信息论 · 计算机科学 2025-07-22 Xufeng Chen , Liang Yan , Xiaoshan Gao

Polar mesocyclones (PMCs) and their intense subclass polar lows (PLs) are relatively small atmospheric vortices that form mostly over the ocean in high latitudes. PLs can strongly influence deep ocean water formation since they are…

大气与海洋物理 · 物理学 2020-11-11 Mikhail Krinitskiy , Polina Verezemskaya , Svyatoslav Elizarov , Sergey Gulev

Machine learning is a useful tool for identifying radio pulses from cosmic-ray air showers and for cleaning such pulses from radio background. This can lower the detection threshold and increase the accuracy for the pulse time and…

天体物理仪器与方法 · 物理学 2025-02-28 Frank G. Schroeder , Abdul Rehman

Recent advancements in data-driven weather forecasting models have delivered deterministic models that outperform the leading operational forecast systems based on traditional, physics-based models. However, these data-driven models are…

机器学习 · 计算机科学 2025-06-02 Christopher Subich , Syed Zahid Husain , Leo Separovic , Jing Yang