Results 21 to 30 of about 105,617 (259)
Arbitrary Sampling Fourier Transform and Its Applications in Magnetic Field Forward Modeling
Applied Sciences, 2022 Numerical simulation and inversion imaging are essential in geophysics exploration. Fourier transform plays a vital role in geophysical numerical simulation and inversion imaging, especially in solving partial differential equations.
Shikun Dai +4 more
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Estimation of Coastal Bathymetry Using Wavelets
Journal of Marine Science and Engineering, 2020 When waves propagate in coastal areas at depths lower than one half the wavelength, they exhibit a different signature at the sea surface and the observed wavelength pattern enables inferring bathymetries.
Diogo Santos +3 more
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REVISED FAST FOURIER TRANSFORM
Radio Electronics, Computer Science, Control, 2014 The problem of realisation of the Discrete Fourier Transform in on-line is analysed because of non-efficient consuming a time for a new recalculation of spectrum samples if one discrete-time signal sample or even some small portion of samples in period are replaced by new sample or by new samples, respectively.
openaire +4 more sources
3D Non-Uniform Fast Fourier Transform Program Optimization
Applied SciencesMRI (magnetic resonance imaging) technology aims to map the internal structure image of organisms. It is an important application scenario of Non-Uniform Fast Fourier Transform (NUFFT), which can help doctors quickly locate the lesion site of patients ...
Kai Nie +4 more
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FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei +3 more
wiley +1 more source
A Multi-Resolution Texture Image Retrieval Using Fast Fourier Transform
The Journal of Engineering Research, 2010 Texture is an important visual property that characterizes a wide range of natural and artificial images which makes it a useful feature for retrieving images. Several approaches have been proposed to describe the texture contents of an image.
A. Abdesselam
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Separation of Variables and the Computation of Fourier Transforms on Finite Groups, II [PDF]
Discrete Mathematics & Theoretical Computer Science, 2020 We present a general diagrammatic approach to the construction of efficient algorithms for computingthe Fourier transform of a function on a finite group.
David Maslan +2 more
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FEBS Open Bio, EarlyView.This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill +4 more
wiley +1 more source
PhotonicsThe previously proposed cascaded inverse fast Fourier transform/fast Fourier transform (IFFT/FFT)-based point-to-multipoint (P2MP) flexible optical transceivers have the potential to equip future intensity modulation and direct detection (IMDD) optical ...
Lin Chen +7 more
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Frequency analyses of human voice using fast Fourier transform
Iraqi Journal of Physics, 2019 Quantitative analysis of human voice has been subject of interest and the subject gained momentum when human voice was identified as a modality for human authentication and identification. The main organ responsible for production of sound is larynx and
Jinan F. Mahdi
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