Results 101 to 110 of about 3,320 (281)
On Determination Method for Resolution of Secondary Electron Images in Scanning Electron Microscopy
Advanced Science, EarlyView.An idealized SEM, termed Rayleigh's microscope, is constructed by Monte Carlo simulation to represent imaging conditions that just satisfy the Rayleigh criterion. Based on this physically defined model, sharpness–resolution conversion curves are established and combined with the Rose criterion, enabling automated resolution evaluation from practical ...
Tongfang Yang, Yanbo Zou, Zejun Ding
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On the Grunbaum Commutor Based Discrete Fractional Fourier Transform,” [PDF]
, 2004 The basis functions of the continuous fractional Fourier transform (FRFT) are linear chirp signals that are suitable for time-frequency analysis of signals with chirping timefrequency content.
Balu Santhanam, Juan G Vargas-Rubio
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ML Workflows for Screening Degradation‐Relevant Properties of Forever Chemicals
Advanced Science, EarlyView.The environmental persistence of per‐ and polyfluoroalkyl substances (PFAS) necessitates efficient remediation strategies. This study presents physics‐informed machine learning workflows that accurately predict critical degradation properties, including bond dissociation energies and polarizability.
Pranoy Ray +3 more
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Fractional Dirac Operators for Edge Detection
Fractal and FractionalThe Dirac operator links harmonic analysis, physics and hypercomplex signal representations. However, most Dirac-based imaging methods remain integer order and lack spectral adaptability.
Rong Huang, Ren Hu, Pan Lian
doaj +1 more source
Advanced Science, EarlyView.A graphene oxide/collagen scaffold is developed for chronic massive rotator cuff tear repair. The scaffold improves compressive stability, supports reparative mesenchymal differentiation, and modulates the immune microenvironment. In chronic MRCT models, it reduces muscle degeneration, enhances tendon–bone regeneration, and improves functional recovery,
Renwen Wan +24 more
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Fractional Fourier transform of the Gaussian and fractional domain signal support [PDF]
, 2003 The fractional Fourier transform (FrFT) provides an important extension to conventional Fourier theory for the analysis and synthesis of linear chirp signals. It is a parameterised transform which can be used to provide extremely compact representations.
Capus, C.
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On single-step HSS iterative method with circulant preconditioner for fractional diffusion equations
Advances in Difference Equations, 2019 By exploiting Toeplitz-like structure and non-Hermitian dense property of the discrete coefficient matrix, a new double-layer iterative method called SHSS-PCG method is employed to solve the linear systems originating from the implicit finite difference ...
Mu-Zheng Zhu, Guo-Feng Zhang, Ya-E Qi
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Continuous vs. discrete fractional Fourier transforms
Journal of Computational and Applied Mathematics, 1999 The authors consider discrete finite versions of the fractional integral Fourier transform, namely a fractionalization of the discrete Fourier transform (DFT) and the fractional Fourier-Kravchuk transform [cf. \textit{N. M. Atakishiyev} and \textit{K. B. Wolf}, Fractional Fourier-Kravchuk transform, J. Opt. Soc. Am. A 14, 1467-1477 (1997)].
Atakishiyev, Natig M. +2 more
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Harnessing Phase Separation for the Development of High‐Performance Hydrogels
Advanced Science, EarlyView.ABSTRACT Hydrogels are indispensable for the development of next‐generation bioelectronics, soft robotics, and biomedical devices, where their mechanical properties determine performance and reliability. Among strategies to enhance hydrogel mechanics, phase separation enables controlled heterogeneity resulting in gel networks that are reinforced by ...
Yue Shao +3 more
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The Discrete fractional fourier transform
, 2016 Cataloged from PDF version of article.
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