Results 21 to 30 of about 584,919 (306)

Estimation of Coastal Bathymetry Using Wavelets

open access: yesJournal 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
doaj   +1 more source

Arbitrary Sampling Fourier Transform and Its Applications in Magnetic Field Forward Modeling

open access: yesApplied 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
doaj   +1 more source

Fast Fourier Transform power spectrum of radon activity

open access: yesRadiation Protection and Environment, 2018
Measurement of outdoor Radon-222 (222Rn) activity at National Atmospheric Research Laboratory (NARL), Gadanki, India, is carried out using Alpha GUARD PQ 2000 PRO from October 2011 to July 2014 and analyzed.
K Charan Kumar   +3 more
doaj   +1 more source

Fast ISAR imaging method for complex manoeuvring target based on local polynomial transform‐fast chirp Fourier transform

open access: yesIET Radar, Sonar & Navigation, 2021
In ISAR imaging, echo signals of complex manoeuvring targets have to be modelled as multi‐component cubic phase signals (m‐CPS). In this condition, the Doppler diffusion will seriously affect the quality of ISAR imaging.
Fengkai Liu   +3 more
doaj   +1 more source

Reconfigurable Hyper-Parallel Fast Fourier Transform Processor Based on Bit-Serial Computing

open access: yesIEEE Access, 2023
The upcoming 5G communication is committed to providing ultra-high throughput and ultra-low delay service. However, digital signal processing technologies will be a critical challenge with the increasing bandwidth and transmitting streams.
Tingyong Wu, Yuxin Wang, Fuqiang Li
doaj   +1 more source

Bond Characterization in Cementitious Material Binders Using Fourier-Transform Infrared Spectroscopy

open access: yesApplied Sciences, 2023
Fourier-transform infrared (FTIR) spectroscopy is a fast and simple technique for functional group identification. This work provides a review and insight into the application and interpretation of FTIR spectroscopy for cementitious binders that comprise
M. Yusuf
semanticscholar   +1 more source

An ultra-precise Fast Fourier Transform

open access: yesMeasurement: Sensors
The Fast Fourier Transform (FFT) is a cornerstone of digital signal processing, generating a computationally efficient estimate of the frequency content of a time series.
Manus Henry
doaj   +1 more source

A Multi-Resolution Texture Image Retrieval Using Fast Fourier Transform

open access: yesThe 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
doaj   +1 more source

Separation of Variables and the Computation of Fourier Transforms on Finite Groups, II [PDF]

open access: yesDiscrete 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
doaj   +1 more source

Optimizing the Fast Fourier Transform Using Mixed Precision on Tensor Core Hardware

open access: yes2018 IEEE 25th International Conference on High Performance Computing Workshops (HiPCW), 2018
The Fast Fourier Transform is a fundamental tool in scientific and technical computation. The highly parallelizable nature of the algorithm makes it a suitable candidate for GPU acceleration.
Anumeena Sorna   +4 more
semanticscholar   +1 more source

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