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In recent years, radio frequency (RF) sensing has gained increasing popularity due to its pervasiveness, low cost, non-intrusiveness, and privacy preservation. However, realizing the promises of RF sensing is highly nontrivial, given…

信号处理 · 电气工程与系统科学 2021-10-29 Tianyue Zheng , Zhe Chen , Shuya Ding , Jun Luo

The "search for extraterrestrial intelligence" (SETI) commensal surveys aim to scan the sky to find possible technosignatures from the extraterrestrial intelligence (ETI). The mitigation of radio frequency interference (RFI) is an important…

天体物理仪器与方法 · 物理学 2023-08-21 Yu-Chen Wang , Zhen-Zhao Tao , Zhi-Song Zhang , Cheqiu Lyu , Tingting Zhang , Tong-Jie Zhang , Dan Werthimer

The lack of low frequency information and a good initial model can seriously affect the success of full waveform inversion (FWI), due to the inherent cycle skipping problem. Computational low frequency extrapolation is in principle the most…

地球物理 · 物理学 2022-10-14 Hongyu Sun , Laurent Demanet

This paper presents the first, 15-PetaFLOP Deep Learning system for solving scientific pattern classification problems on contemporary HPC architectures. We develop supervised convolutional architectures for discriminating signals in…

Direction of arrival (DoA) estimation of targets improves with the number of elements employed by a phased array radar antenna. Since larger arrays have high associated cost, area and computational load, there is recent interest in thinning…

信号处理 · 电气工程与系统科学 2019-02-05 Ahmet M. Elbir , Kumar Vijay Mishra , Yonina C. Eldar

The (inverse) discrete Fourier transform (DFT/IDFT) is often perceived as essential to orthogonal frequency-division multiplexing (OFDM) systems. In this paper, a deep complex-valued convolutional network (DCCN) is developed to recover bits…

信号处理 · 电气工程与系统科学 2021-05-07 Zhongyuan Zhao , Mehmet C. Vuran , Fujuan Guo , Stephen D. Scott

We quantify the effect of radio frequency interference (RFI) on measurements of the 21-cm power spectrum during the Epoch of Reionization (EoR). Specifically, we investigate how the frequency structure of RFI source emission generates…

天体物理仪器与方法 · 物理学 2020-09-09 Michael J. Wilensky , Nichole Barry , Miguel F. Morales , Bryna J. Hazelton , Ruby Byrne

Deep neural networks (DNNs) are so over-parametrized that recent research has found them to already contain a subnetwork with high accuracy at their randomly initialized state. Finding these subnetworks is a viable alternative training…

计算机视觉与模式识别 · 计算机科学 2021-11-25 Ángel López García-Arias , Masanori Hashimoto , Masato Motomura , Jaehoon Yu

Machine learning research in GNSS radio frequency interference (RFI) detection often lacks a clear empirical justification for the choice of deep learning architectures over simpler machine learning approaches. In this work, we argue for a…

信号处理 · 电气工程与系统科学 2025-04-15 Viktor Ivanov , Richard C. Wilson , Maurizio Scaramuzza

Hyperparameter selection is an essential aspect of the machine learning pipeline, profoundly impacting models' robustness, stability, and generalization capabilities. Given the complex hyperparameter spaces associated with Neural Networks…

机器学习 · 计算机科学 2024-10-18 Ruinan Wang , Ian Nabney , Mohammad Golbabaee

A novel unsupervised deep learning method is developed to identify individual-specific large scale brain functional networks (FNs) from resting-state fMRI (rsfMRI) in an end-to-end learning fashion. Our method leverages deep Encoder-Decoder…

计算机视觉与模式识别 · 计算机科学 2020-12-14 Hongming Li , Yong Fan

GPR full-waveform inversion optimizes the subsurface property model iteratively to match the entire waveform information. However, the model gradients derived from wavefield continuation often contain errors, such as ghost values and…

地球物理 · 物理学 2024-10-14 Peng Jiang , Kun Wang , Jiaxing Wang , Zeliang Feng , Shengjie Qiao , Runhuai Deng , Fengkai Zhang

Dense pixel matching problems such as optical flow and disparity estimation are among the most challenging tasks in computer vision. Recently, several deep learning methods designed for these problems have been successful. A sufficiently…

计算机视觉与模式识别 · 计算机科学 2023-11-02 Ali Salehi , Madhusudhanan Balasubramanian

As radio telescopes become more sensitive, the damaging effects of radio frequency interference (RFI) become more apparent. Near radio telescope arrays, RFI sources are often easily removed or replaced; the challenge lies in identifying…

天体物理仪器与方法 · 物理学 2018-08-01 Daniel Czech , Amit Mishra , Michael Inggs

A new L-band 7 feed array at the 100-m telescope is used to perform an unbiased, fully sampled HI survey of the whole northern hemisphere - the Effelsberg-Bonn HI Survey (EBHIS). The use of state-of-the-art digital Fast Fourier Transform…

天体物理仪器与方法 · 物理学 2010-07-15 L. Flöer , B. Winkel , J. Kerp

Phase retrieval, or the process of recovering phase information in reciprocal space to reconstruct images from measured intensity alone, is the underlying basis to a variety of imaging applications including coherent diffraction imaging…

计算机视觉与模式识别 · 计算机科学 2018-11-15 Mathew J. Cherukara , Youssef S. G. Nashed , Ross J. Harder

We introduce deep learning technique to predict the beam propagation factor M^2 of the laser beams emitting from few-mode fiber for the first time, to the best of our knowledge. The deep convolutional neural network (CNN) is trained with…

图像与视频处理 · 电气工程与系统科学 2019-07-16 Yi An , Jun Li , Liangjin Huang , Jinyong Leng , Lijia Yang , Pu Zhou

Traditionally, fast radio transient searches are conducted on dedispersed time series using thresholding techniques based on the statistical properties of the data. However, peaks in dedispersed time series do not directly provide…

天体物理仪器与方法 · 物理学 2025-11-25 Sergio Belmonte Diaz , Rene P. Breton , Zafiirah Hosenie , Ben W. Stappers

Deep learning techniques have revolutionized the field of machine learning and were recently successfully applied to various classification problems in noninvasive electroencephalography (EEG). However, these methods were so far only rarely…

Modern machine learning tools such as deep neural networks (DNNs) are playing a revolutionary role in many fields such as natural language processing, computer vision, and the internet of things. Once they are trained, deep learning models…

机器学习 · 计算机科学 2022-01-19 Arjun Parthasarathy , Bhaskar Krishnamachari