Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Ferrari,André"'
Publikováno v:
Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave
The design of starshades, i.e. external occulters for stellar coronography, relies on the fast and precise computation of their associated diffraction patterns of incoming plane waves in the telescope aperture plane. We present here a method based on
Externí odkaz:
http://arxiv.org/abs/2411.03254
Publikováno v:
Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave
Solar and stellar externally occulted coronagraphs share similar concepts, but are actually very different because of geometric characteristics. Solar occulters were first developed with a simple geometric model of diffraction perpendicular to the oc
Externí odkaz:
http://arxiv.org/abs/2411.03144
Autor:
Borsoi, Ricardo Augusto, Richard, Cédric, Ferrari, André, Chen, Jie, Bermudez, José Carlos Moreira
The automatic detection of changes or anomalies between multispectral and hyperspectral images collected at different time instants is an active and challenging research topic. To effectively perform change-point detection in multitemporal images, it
Externí odkaz:
http://arxiv.org/abs/2006.14033
Change-points in time series data are usually defined as the time instants at which changes in their properties occur. Detecting change-points is critical in a number of applications as diverse as detecting credit card and insurance frauds, or intrus
Externí odkaz:
http://arxiv.org/abs/2002.02704
Detecting abrupt changes in streaming graph signals is relevant in a variety of applications ranging from energy and water supplies, to environmental monitoring. In this paper, we address this problem when anomalies activate localized groups of nodes
Externí odkaz:
http://arxiv.org/abs/1910.06561
This article investigates the quality of the estimator of the linear Monge mapping between distributions. We provide the first concentration result on the linear mapping operator and prove a sample complexity of $n^{-1/2}$ when using empirical estima
Externí odkaz:
http://arxiv.org/abs/1905.10155
Publikováno v:
Monthly Notices of the Royal Astronomical Society 2019
In the era of big data, radio astronomical image reconstruction algorithms are challenged to estimate clean images given limited computing resources and time. This article is driven by the need for large scale image reconstruction for the future Squa
Externí odkaz:
http://arxiv.org/abs/1905.08468
Publikováno v:
In Pattern Recognition January 2023 133
In radio astronomy, accurate calibration is of crucial importance for the new generation of radio interferometers. More specifically, because of the potential presence of outliers which affect the measured data, robustness needs to be ensured. On the
Externí odkaz:
http://arxiv.org/abs/1807.11738
In this paper, we aim to design robust estimation techniques based on the compound-Gaussian (CG) process and adapted for calibration of radio interferometers. The motivation beyond this is due to the presence of outliers leading to an unrealistic tra
Externí odkaz:
http://arxiv.org/abs/1807.11382