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Pulsar surveys generate millions of candidates per run, overwhelming manual inspection. This thesis builds a deep learning pipeline for radio pulsar candidate selection that fuses array-derived features with image diagnostics. From…

天体物理仪器与方法 · 物理学 2025-10-31 Manideep Pendyala

Inverse medium scattering is an ill-posed, nonlinear wave-based imaging problem arising in medical imaging, remote sensing, and non-destructive testing. Machine learning (ML) methods offer increased inference speed and flexibility in…

In this article, we argue that models based on machine learning (ML) can be very effective in estimating the non-linear matter power spectrum ($P(k)$). We employ the prediction ability of the supervised ML algorithms to build an estimator…

宇宙学与河外天体物理 · 物理学 2015-07-17 Irshad Mohammed , Janu Verma

Machine Learning (ML) has become a promising tool for improving the quality of atomistic simulations. Using formaldehyde as a benchmark system for intramolecular interactions, a comparative assessment of ML models based on state-of-the-art…

The paper presents an innovative methodology for designing frequency selective surface (FSS) based radar absorbing materials using machine learning (ML) technique. In conventional electromagnetic design, unit cell dimensions of FSS are used…

信号处理 · 电气工程与系统科学 2025-02-26 Vijay Kumar Sutrakar , Anjana P K , Sajal Kesharwani , Siddharth Bisariya

Magnet errors in storage rings significantly degrade beam performance, impacting the brightness and stability of the light source. Therefore, beam-based correction is crucial for the safe operation of machines and the stability of radiated…

加速器物理 · 物理学 2025-12-18 Jianhao Xu

Self-supervised learning (SSL) models have achieved considerable improvements in automatic speech recognition (ASR). In addition, ASR performance could be further improved if the model is dedicated to audio content information learning…

音频与语音处理 · 电气工程与系统科学 2022-12-08 Genshun Wan , Tan Liu , Hang Chen , Jia Pan , Cong Liu , Zhongfu Ye

We report results obtained from a systematic analysis of X-ray lags in a sample of black hole X-ray binaries, with the aim of assessing the presence of reverberation lags and studying their evolution during outburst. We used XMM-Newton and…

高能天体物理现象 · 物理学 2015-10-13 B. De Marco , G. Ponti , T. Muñoz-Darias , K. Nandra

Black hole accretion flows show rapid X-ray variability. The Power Spectral Density (PSD) of this is typically fit by a phenomenological model of multiple Lorentzians for both the broad band noise and Quasi-Periodic Oscillations (QPOs). Our…

高能天体物理现象 · 物理学 2015-05-30 Adam Ingram , Chris Done

The power spectral density (PSD) represents a key property quantifying the stochastic or random noise type fluctuations in variable sources like Active Galactic Nuclei (AGN). In recent years, estimates of the PSD have been refined by…

高能天体物理现象 · 物理学 2020-10-05 Nachiketa Chakraborty , Frank M. Rieger

We use a recently released SDSS catalog of X-ray emitting AGNs in conjunction with the FIRST 20cm radio survey to investigate the black hole fundamental plane relationship between the 1.4GHz radio luminosity ($L_r$), 0.1-2.4 keV X-ray…

天体物理学 · 物理学 2009-11-13 Zhao-Yu Li , Xue-Bing Wu , Ran Wang

Prediction of late reverberation component using multi-channel linear prediction (MCLP) in short-time Fourier transform (STFT) domain is an effective means to enhance reverberant speech. Traditionally, a speech power spectral density (PSD)…

音频与语音处理 · 电气工程与系统科学 2018-12-05 Srikanth Raj Chetupalli , Thippur V. Sreenivas

The classification of the optical spectra of active galactic nuclei (AGN) into different types is well founded on AGN physics, but it involves some degree of human oversight and cannot be reliably scaled to large data sets. Machine learning…

星系天体物理 · 物理学 2021-08-04 T. Peruzzi , M. Pasquato , S. Ciroi , M. Berton , P. Marziani , E. Nardini

For reentry or near space communication, owing to the influence of the time-varying plasma sheath channel environment, the received IQ baseband signals are severely rotated on the constellation. Researches have shown that the frequency of…

信号处理 · 电气工程与系统科学 2019-05-31 Haoyan Liu , Yanming Liu , Ming Yang , Xiaoping Li

The model-based library (MBL) method has already been established for the accurate measurement of critical dimension (CD) of semiconductor linewidth from a critical dimension scanning electron microscope (CD-SEM) image. In this work the MBL…

计算物理 · 物理学 2023-11-28 P. Guo , H. Miao , Y. B. Zou , S. F. Mao , Z. J. Ding

We try to identify the sources and systematics of the uncertainty of the masses of the central black holes in active galactic nuclei (AGNs) which have been obtained by reverberation-mapping methods. We characterize the broad H$\beta$…

天体物理学 · 物理学 2010-01-07 Suzy Collin , Toshihiro Kawaguchi , Brad Peterson , Marianne Vestergaard

Detecting substructure within strongly lensed images is a promising route to shed light on the nature of dark matter. However, it is a challenging task, which traditionally requires detailed lens modeling and source reconstruction, taking…

宇宙学与河外天体物理 · 物理学 2022-02-15 Bryan Ostdiek , Ana Diaz Rivero , Cora Dvorkin

We present the first X-ray reverberation mass measurement of a stellar-mass black hole. Accreting stellar-mass and supermassive black holes display characteristic spectral features resulting from reprocessing of hard X-rays by the accretion…

高能天体物理现象 · 物理学 2019-07-10 Guglielmo Mastroserio , Adam Ingram , Michiel van der Klis

Background reduction in the SuperCDMS dark matter experiment depends on removing surface events within individual detectors by identifying the location of each incident particle interaction. Position reconstruction is achieved by combining…

高能物理 - 实验 · 物理学 2024-04-18 P. B. Cushman , M. C. Fritts , A. D. Chambers , A. Roy , T. Li

Context: Automated software defect prediction (SDP) methods are increasingly applied, often with the use of machine learning (ML) techniques. Yet, the existing ML-based approaches require manually extracted features, which are cumbersome,…

软件工程 · 计算机科学 2022-10-06 Görkem Giray , Kwabena Ebo Bennin , Ömer Köksal , Önder Babur , Bedir Tekinerdogan