Results 41 to 50 of about 1,798 (292)
Method for high-resolution SAR imaging based on inverse radon transform
The Journal of Engineering, 2019 The influence of high-frequency platform vibration needs to be considered in the synthetic aperture radar (SAR) signal processing, especially at the case that the carrier frequency is in high frequency band.
Zhaofa Wang, Yong Wang, Liang Xu
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Translation invariant Radon transforms [PDF]
, 1991 E.~T. Quinto proved that for a generalized Radon transform $R$ on ${opr}^n$ the translation invariance of the operator $R^tcirc R$ implies the invertibility of $R$. In this paper an other concept of the translation invariance is defined.
Kurusa Árpád
core
All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security
Advanced Materials, EarlyView.An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak +4 more
wiley +1 more source
Radon transforms and the SYK model
Journal of High Energy PhysicsMotivated by recent work on the Sachdev-Ye-Kitaev (SYK) model, we consider the effect of Radon or X-ray transformations, on the Laplace eigenfunctions in hyperbolic Bolyai-Lobachevsky space.
Michael Stone
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Radon-type transforms for holomorphic functions in the lie ball
, 2019 In this paper, we consider holomorphic functions on the m-dimensional Lie ball LB(0,1) which admit a square integrable extension on the Lie sphere. We then define orthogonal projections of this set onto suitable subsets of functions defined in lower ...
Sabadini I. +3 more
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Why Is the Mechanism Underlying the Chiral‐Induced Selectivity Effect Still Challenging?
Advanced Materials, EarlyView.The chiral‐induced spin selectivity (CISS) effect is observed in many experimental configurations and for different materials. However, there are theoretical challenges in attempting to explain those results. A qualitative framework for explaining all the results is presented.
Ron Naaman, Yossi Paltiel
wiley +1 more source
Inversion Formulas for the Spherical Radon-Dunkl Transform
Symmetry, Integrability and Geometry: Methods and Applications, 2009 The spherical Radon-Dunkl transform R_κ, associated to weight functions invariant under a finite reflection group, is introduced, and some elementary properties are obtained in terms of h-harmonics.
Zhongkai Li, Futao Song
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Scattered Radiation Emission Imaging: Principles and Applications
International Journal of Biomedical Imaging, 2011 Imaging processes built on the Compton scattering effect have been under continuing investigation since it was first suggested in the 50s. However, despite many innovative contributions, there are still formidable theoretical and technical challenges to ...
M. K. Nguyen +3 more
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Tailoring Phonon‐Driven Responses in α‐MoO3 through Isotopic Enrichment
Advanced Materials, EarlyView.ABSTRACT The implementation of polaritonic materials into nanoscale devices requires selective tuning of parameters to realize desired spectral or thermal responses. One robust material, α‐MoO3, an orthorhombic crystal boasting three distinct phonon dispersions, provides three polaritonic dispersions of hyperbolic phonon polaritons (HPhPs) across the ...
Thiago S. Arnaud +31 more
wiley +1 more source
The Radon transform on Abelian Groups
Journal of Combinatorial Theory, Series A, 1987 Let A be a finite group and let B be a subset of A. For any function \(f: A\to {\mathbb{C}}\), one can define the function \(F_ B: A\to {\mathbb{C}}\), called the Radon transform of f with respect to B by \(F_ B(a):=\sum_{b\in B}f(ab)\). The problem we address in this note is: for which subsets B is the Radon transform invertible ?
Peter Frankl, Ronald L. Graham
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