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The Polarisation Sky Survey of the Universe's Magnetism (POSSUM) will conduct a sensitive $\sim$1 GHz radio polarization survey covering 20 000 square degrees of the Southern sky with the Australian Square Kilometre Array Pathfinder…

Extremely flat and inverted radio spectra as observed in galactic nuclei and BL Lac sources are still a challenge for fast particle acceleration models. Continuous acceleration by electric fields in reconnection regions can result in almost…

天体物理学 · 物理学 2009-11-06 G. T. Birk , A. R. Crusius--Waetzel , H. Lesch

Classifying large scale networks into several categories and distinguishing them according to their fine structures is of great importance with several applications in real life. However, most studies of complex networks focus on properties…

计算机视觉与模式识别 · 计算机科学 2022-09-07 Ruyue Xin , Jiang Zhang , Yitong Shao

Radio spectrum monitoring in contested environments motivates the need for reliable automatic signal classification technology. Prior work highlights deep learning as a promising approach, but existing models depend on brute-force Doppler…

信号处理 · 电气工程与系统科学 2025-11-19 Avi Bagchi , Dwight Hutchenson

The state-of-the-art in semantic segmentation is currently represented by fully convolutional networks (FCNs). However, FCNs use large receptive fields and many pooling layers, both of which cause blurring and low spatial resolution in the…

计算机视觉与模式识别 · 计算机科学 2016-05-26 Gedas Bertasius , Jianbo Shi , Lorenzo Torresani

Although Convolutional Neural Networks (CNNs) have achieved promising results in image classification, they still are vulnerable to affine transformations including rotation, translation, flip and shuffle. The drawback motivates us to…

计算机视觉与模式识别 · 计算机科学 2023-12-14 Zijie Tan , Guanfang Dong , Chenqiu Zhao , Anup Basu

Modern high-sensitivity radio telescopes are discovering an increased number of resolved sources with intricate radio structures and fainter radio emissions. These sources often present a challenge because source detectors might identify…

天体物理仪器与方法 · 物理学 2024-06-12 Lara Alegre , Philip Best , Jose Sabater , Huub Rottgering , Martin Hardcastle , Wendy Williams

Deep learning algorithms offer a powerful means to automatically analyze the content of medical images. However, many biological samples of interest are primarily transparent to visible light and contain features that are difficult to…

计算机视觉与模式识别 · 计算机科学 2017-09-22 Roarke Horstmeyer , Richard Y. Chen , Barbara Kappes , Benjamin Judkewitz

Giant radio galaxies (GRGs) are physically large radio sources that extend well beyond their host galaxy environment. Their polarization properties are affected by the poorly constrained magnetic field that permeates the intergalactic…

We have obtained the polarization data cube of the VRO 42.05.01 supernova remnant at 1240 MHz using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Three-dimensional Faraday Synthesis is applied to the FAST data to derive…

星系天体物理 · 物理学 2023-06-05 Li Xiao , Ming Zhu , Xiao-Hui Sun , Peng Jiang , Chun Sun

A claimed detection of cosmological tensor perturbations from inflation via B-mode polarization of the cosmic microwave background requires distinguishing other possible B-mode sources. One such potential source of confusion is primordial…

宇宙学与河外天体物理 · 物理学 2022-09-21 Yilun Guan , Arthur Kosowsky

Considering the spatially separated polarization radiation and Faraday rotation regions to simulate complex interstellar media, we study synchrotron polarization gradient techniques' measurement capabilities. We explore how to trace the…

高能天体物理现象 · 物理学 2021-07-14 Ru-Yue Wang , Jian-Fu Zhang , Alex Lazarian , Hua-Ping Xiao , Fu-Yuan Xiang

Optical neural networks are emerging as a powerful and versatile tool for processing optical signals directly in the optical domain with superior speed, integrability, and functionality. Their application to optical polarization enables…

光学 · 物理学 2025-06-24 Alessandro Petrini , Claudio Conti , Davide Pierangeli

Astrophysical images in the GeV band are challenging to analyze due to the strong contribution of the background and foreground astrophysical diffuse emission and relatively broad point spread function of modern space-based instruments. In…

计算机视觉与模式识别 · 计算机科学 2020-12-09 Mariia Drozdova , Anton Broilovskiy , Andrey Ustyuzhanin , Denys Malyshev

This paper addresses the problem of depth estimation from a single still image. Inspired by recent works on multi- scale convolutional neural networks (CNN), we propose a deep model which fuses complementary information derived from…

计算机视觉与模式识别 · 计算机科学 2017-04-10 Dan Xu , Elisa Ricci , Wanli Ouyang , Xiaogang Wang , Nicu Sebe

We investigate the origin of the high Faraday rotation measures (RMs) found for polarized radio galaxies in clusters. The two most likely origins are, magnetic fields local to the source, or magnetic fields located in the foreground…

天体物理学 · 物理学 2009-11-07 T. A. Ensslin , C. Vogt , T. E. Clarke , G. B. Taylor

Out of the estimated few trillion galaxies, only around a million have been detected through radio frequencies, and only a tiny fraction, approximately a thousand, have been manually classified. We have addressed this disparity between…

天体物理仪器与方法 · 物理学 2023-10-10 Mir Sazzat Hossain , Sugandha Roy , K. M. B. Asad , Arshad Momen , Amin Ahsan Ali , M Ashraful Amin , A. K. M. Mahbubur Rahman

The polarisation dynamics of nuclear spins weakly coupled to an NV center is highly sensitive to the parameters of the microwave control and the nuclear Larmor frequency. What is commonly regarded as a challenge, we propose here as a…

量子物理 · 物理学 2018-10-24 Q. Chen , Z. -Y. Wang , B. Tratzmiller , I. Schwartz , M. B. Plenio

Most current semantic segmentation methods rely on fully convolutional networks (FCNs). However, their use of large receptive fields and many pooling layers cause low spatial resolution inside the deep layers. This leads to predictions with…

计算机视觉与模式识别 · 计算机科学 2017-05-09 Gedas Bertasius , Lorenzo Torresani , Stella X. Yu , Jianbo Shi

I/Q modulation classification is a unique pattern recognition problem as the data for each class varies in quality, quantified by signal to noise ratio (SNR), and has structure in the complex-plane. Previous work shows treating these…

计算机视觉与模式识别 · 计算机科学 2020-10-22 Jakob Krzyston , Rajib Bhattacharjea , Andrew Stark
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