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Microwave, submillimetre-wave, and far-infrared phased arrays are of considerable importance for astronomy. We consider the behaviour imaging phased arrays and interferometric phased arrays from a functional perspective. It is shown that…

天体物理学 · 物理学 2009-11-11 Stafford Withington , George Saklatvala , Michael P. Hobson

Automated fiber placement (AFP) is an advanced manufacturing technology that increases the rate of production of composite materials. At the same time, the need for adaptable and fast inline control methods of such parts raises. Existing…

计算机视觉与模式识别 · 计算机科学 2019-10-14 Sebastian Zambal , Christoph Heindl , Christian Eitzinger , Josef Scharinger

The scarcity and low diversity of well-annotated automotive radar datasets often limit the performance of deep-learning-based environmental perception. To overcome these challenges, we propose a conditional generative framework for…

计算机视觉与模式识别 · 计算机科学 2026-01-13 Zhaoze Wang , Changxu Zhang , Tai Fei , Christopher Grimm , Yi Jin , Claas Tebruegge , Ernst Warsitz , Markus Gardill

Estimation of the Discrete-Time Fourier Transform (DTFT) at points of a finite domain arises in many imaging applications. A new approach to this task, the Golden Angle Linogram Fourier Domain (GALFD), is presented, together with a…

Spectral graph embedding plays a critical role in graph representation learning by generating low-dimensional vector representations from graph spectral information. However, the embedding space of traditional spectral embedding methods…

机器学习 · 计算机科学 2026-05-19 Changjie Sheng , Zhichao Zhang , Yangfan He

X-ray interferometry is an emerging imaging modality with a wide variety of potential clinical applications, including lung imaging. A grating interferometer uses a diffraction grating to produce a periodic interference pattern and measures…

Novel view synthesis with sparse inputs poses great challenges to Neural Radiance Field (NeRF). Recent works demonstrate that the frequency regularization of Positional Encoding (PE) can achieve promising results for few-shot NeRF. In this…

计算机视觉与模式识别 · 计算机科学 2024-10-24 Qingshan Xu , Xuanyu Yi , Jianyao Xu , Wenbing Tao , Yew-Soon Ong , Hanwang Zhang

Phase fractions, compositions and energies of the stable phases as a function of macroscopic composition, temperature, and pressure (X-T-P) are the principle correlations needed for the design of new materials and improvement of existing…

材料科学 · 物理学 2020-02-04 Noah H Paulson , Brandon J Bocklund , Richard A Otis , Zi-Kui Liu , Marius Stan

Wavefront sensing involves estimating the phase and intensity of light, enabling a wide range of imaging applications, from adaptive optics and astronomy to biomedical imaging. Since conventional image sensors can only measure the spatial…

图像与视频处理 · 电气工程与系统科学 2026-04-07 Nebiyou Yismaw , Vishwanath Saragadam , Aswin C. Sankaranarayanan , M. Salman Asif

The task of dynamic flow estimation is to construct an approximation of an evolving flow---and particularly, its response to disturbances---using measurements from available sensors. Building from previous work by Darakananda et al.~(Phys…

流体动力学 · 物理学 2021-05-19 Mathieu Le Provost , Jeff D. Eldredge

Fusion experiments rely heavily on the measurement of the line-integrated electron density by interferometry for density feed-back control. In recent years the discharge length has increased dramatically and is continuing to rise, resulting…

仪器与探测器 · 物理学 2019-11-14 K. J. Brunner , J. Knauer , J. Meineke , M. Stern , M. Hirsch , B. Kursinski , R. C. Wolf , the W7-X team

NeRF acquisition typically requires careful choice of near planes for the different cameras or suffers from background collapse, creating floating artifacts on the edges of the captured scene. The key insight of this work is that background…

计算机视觉与模式识别 · 计算机科学 2023-06-16 Julien Philip , Valentin Deschaintre

Electrocardiogram (ECG) analysis plays a crucial role in diagnosing cardiovascular diseases, but accurate interpretation of these complex signals remains challenging. This paper introduces a novel multimodal framework(GAF-FusionNet) for ECG…

计算机视觉与模式识别 · 计算机科学 2025-01-07 Jiahao Qin , Feng Liu

Spectrographs nominally contain a degree of quasi-static optical aberrations resulting from the quality of manufactured component surfaces, imperfect alignment, design residuals, thermal effects, and other other associated phenomena…

天体物理仪器与方法 · 物理学 2021-07-28 Eric B. Bechter , Andrew J. Bechter , Justin R. Crepp , Jonathan Crass

Radio interferometers are phased arrays producing high-resolution images from the covariance matrix of measurements. Calibration of such instruments is necessary and is a critical task. This is how the estimation of instrumental errors is…

天体物理仪器与方法 · 物理学 2023-09-26 Yassine Mhiri , Mohammed Nabil El Korso , Arnaud Breloy , Pascal Larzabal

Electrostatic field matching (EFM) has recently appeared as a novel physics-inspired paradigm for data generation and transfer using the idea of an electric capacitor. However, it requires modeling electrostatic fields using neural…

机器学习 · 计算机科学 2026-03-04 Stepan I. Manukhov , Alexander Kolesov , Vladimir V. Palyulin , Alexander Korotin

Dynamic graph signal processing provides a principled framework for analyzing time-varying data defined on irregular graph domains. However, existing joint time-vertex transforms such as the joint time-vertex fractional Fourier transform…

信号处理 · 电气工程与系统科学 2025-11-21 Manjun Cui , Ziqi Yan , Yangfan He , Zhichao Zhang

Radiative transfer effects need to be taken into account when analysing spectral line observations. When the data are not sufficient for detailed modelling, simpler methods are needed. The escape probability formalism (EPF) is one such…

天体物理仪器与方法 · 物理学 2025-04-16 Mika Juvela

The limited dynamic range of the detector can impede coherent diffractive imaging (CDI) schemes from achieving diffraction-limited resolution. To overcome this limitation, a straightforward approach is to utilize high dynamic range (HDR)…

图像与视频处理 · 电气工程与系统科学 2024-06-11 Shantanu Kodgirwar , Lars Loetgering , Chang Liu , Aleena Joseph , Leona Licht , Daniel S. Penagos Molina , Wilhelm Eschen , Jan Rothhardt , Michael Habeck

3D-aware image generative modeling aims to generate 3D-consistent images with explicitly controllable camera poses. Recent works have shown promising results by training neural radiance field (NeRF) generators on unstructured 2D images, but…

计算机视觉与模式识别 · 计算机科学 2022-08-24 Yu Deng , Jiaolong Yang , Jianfeng Xiang , Xin Tong