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Resonant scattering of fast particles off low frequency plasma waves is a major process determining transport characteristics of energetic particles in the heliosphere and contributing to their acceleration. Usually, only Alfv\'en waves are…

高能天体物理现象 · 物理学 2017-02-20 Cedric Schreiner , Patrick Kilian , Felix Spanier

A successful ground array Radio Frequency (RF)-only self-trigger on 10 high-energy cosmic ray events is demonstrated with 256 dual-polarization antennas of the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA). This RF-only…

Spike-and-wave discharges (SWDs) are the electroencephalographic hallmark of absence epilepsy, yet their manual identification in multi-day recordings remains labour-intensive and error-prone. We present a lightweight hybrid pipeline that…

信号处理 · 电气工程与系统科学 2025-09-25 Antonio Quintero Rincon , Nicolas Masino , Veronica Marsico , Hadj Batatia

Kinetic simulations and theory demonstrate that whistler waves can excite oblique, short-wavelength fluctuations through secondary drift instabilities if a population of sufficiently cold plasma is present. The excited modes lead to heating…

等离子体物理 · 物理学 2021-04-20 Vadim Roytershteyn , Gian Luca Delzanno

Few-shot image classification is a challenging task in the field of machine learning, involving the identification of new categories using a limited number of labeled samples. In recent years, methods based on local descriptors have made…

计算机视觉与模式识别 · 计算机科学 2024-08-29 Bingchen Yan

Anomaly detection has many important applications, such as monitoring industrial equipment. Despite recent advances in anomaly detection with deep-learning methods, it is unclear how existing solutions would perform under…

声音 · 计算机科学 2022-04-06 Bingqing Chen , Luca Bondi , Samarjit Das

Spike-and-wave discharge (SWD) pattern classification in electroencephalography (EEG) signals is a key problem in signal processing. It is particularly important to develop a SWD automatic detection method in long-term EEG recordings since…

信号处理 · 电气工程与系统科学 2020-11-02 Antonio Quintero-Rincón , Valeria Muro , Carlos D'Giano , Jorge Prendes , Hadj Batatia

AI is foreseen to be a centerpiece in next generation wireless networks enabling enabling ubiquitous communication as well as new services. However, in real deployment, feature distribution changes may degrade the performance of AI models…

Deep learning is applied to many complex tasks in the field of wireless communication, such as modulation recognition of spectrum waveforms, because of its convenience and efficiency. This leads to the problem of a malicious third party…

机器学习 · 计算机科学 2022-01-24 Haidong Xie , Jia Tan , Xiaoying Zhang , Nan Ji , Haihua Liao , Zuguo Yu , Xueshuang Xiang , Naijin Liu

M-dwarf flare stars like AD Leo are laboratories for studying intense magnetic activities. The coherent radio bursts they produce are powerful probes of stellar coronal plasma and magnetic fields. In this study, we present high-resolution…

太阳与恒星天体物理 · 物理学 2026-04-02 Wenjie Zou , Hui Tian , Jiale Zhang , Yuhang Gao

Blazars are a subclass of active galactic nuclei with relativistic jets pointing toward the observer. They are notable for their flux variability at all observed wavelengths and timescales. Together with simultaneous measurements at lower…

高能天体物理现象 · 物理学 2025-02-21 Hermann Stolte , Jonas Sinapius , Iftach Sadeh , Elisa Pueschel , Matthias Weidlich , David Berge

We present a theoretical background for the data analysis of the gravitational-wave signals from spinning neutron stars for Earth-based laser interferometric detectors. We introduce a detailed model of the signal including both the…

广义相对论与量子宇宙学 · 物理学 2009-12-30 Piotr Jaranowski , Andrzej Królak , Bernard F. Schutz

Avalanche photo detection is commonly used in applications which require single photon sensitivity. We examine the limits of using avalanche photo diodes (APD) for characterising photon statistics at high data rates. To identify the regime…

量子物理 · 物理学 2009-11-13 H. B. Coldenstrodt-Ronge , C. Silberhorn

Scattered light noise affects the sensitivity of gravitational waves detectors. The characterization of such noise is needed to mitigate it. The time-varying filter empirical mode decomposition algorithm is suitable for identifying signals…

天体物理仪器与方法 · 物理学 2022-09-21 Stefano Bianchi , Alessandro Longo , Guillermo Valdes , Gabriela González , Wolfango Plastino

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

Radar sensors can be used for analyzing the induced frequency shifts due to micro-motions in both range and velocity dimensions identified as micro-Doppler ($\boldsymbol{\mu}$-D) and micro-Range ($\boldsymbol{\mu}$-R), respectively.…

计算机视觉与模式识别 · 计算机科学 2018-06-13 Sherif Abdulatif , Qian Wei , Fady Aziz , Bernhard Kleiner , Urs Schneider

Modern applications such as voice recognition rely on the ability to compare signals to pre-recorded ones to classify them. However, this comparison typically needs to ignore differences due to signal noise, temporal offset, signal…

机器学习 · 计算机科学 2022-06-16 Arvind Seshan

Far-field characterization of small objects is severely constrained by the diffraction limit. Existing tools achieving sub-diffraction resolution often utilize point-by-point image reconstruction via scanning or labelling. Here, we present…

A web-based tool called ADFilter was developed to process collision events using autoencoders based on a deep unsupervised neural network. The autoencoders are trained on a small fraction of either collision data or Standard Model Monte…

高能物理 - 唯象学 · 物理学 2025-03-26 Sergei V. Chekanov , Wasikul Islam , Rui Zhang , Nicholas Luongo

Low-Gain Avalanche Detectors are gathering interest in the High-Energy Physics community thanks to their fast-timing and radiation-hardness properties, which are planned to be exploited, for example, in timing detectors for the upgrades of…

仪器与探测器 · 物理学 2019-05-07 Gabriele Giacomini , Wei Chen , Francesco Lanni , Alessandro Tricoli
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