Results 31 to 40 of about 656,052 (290)
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
doaj +1 more source
Fast computation of magnetostatic fields by Non-uniform Fast Fourier Transforms [PDF]
Applied Physics Letters 93, 13 (2008) 132508, 2008 The bottleneck of micromagnetic simulations is the computation of the long-ranged magnetostatic fields. This can be tackled on regular N-node grids with Fast Fourier Transforms in time N logN, whereas the geometrically more versatile finite element methods (FEM) are bounded to N^4/3 in the best case.
arxiv +1 more source
Correcting soft errors online in fast fourier transform [PDF]
, 2017 While many algorithm-based fault tolerance (ABFT) schemes have been proposed to detect soft errors offline in the fast Fourier transform (FFT) after computation finishes, none of the existing ABFT schemes detect soft errors online before the computation ...
Chen, Jieyang +9 more
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Obtaining the Quantum Fourier Transform from the Classical FFT with QR Decomposition [PDF]
, 2010 We present the detailed process of converting the classical Fourier Transform algorithm into the quantum one by using QR decomposition. This provides an example of a technique for building quantum algorithms using classical ones.
Barenco +12 more
core +2 more sources
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 +6 more sources
Multi‐institutional study on image quality for a novel CBCT solution on O‐ring linac
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Introduction This work presents a multi‐institutional study on image quality provided by a novel cone beam computed tomography (CBCT). The main goal is to investigate the consistency of imaging performance across multiple institutions.
Luis Agulles‐Pedrós +11 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Sleep spindles are an electrophysiological fingerprint of the sleeping human brain. They can be described in terms of duration, frequency, amplitude, and density, and vary widely according to age and sex. Spindles play a role in sleep and wake functions and are altered in several neurological and psychiatric disorders.
Julien Coelho +8 more
wiley +1 more source
Fast algorithms for nonuniform Chirp-Fourier transform
AIMS MathematicsThe Chirp-Fourier transform is one of the most important tools of the modern signal processing. It has been widely used in the fields of ultrasound imaging, parameter estimation, and so on.
Yannan Sun , Wenchao Qian
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Large-Scale Discrete Fourier Transform on TPUs
IEEE Access, 2021 In this work, we present two parallel algorithms for the large-scale discrete Fourier transform (DFT) on Tensor Processing Unit (TPU) clusters. The two parallel algorithms are associated with two DFT formulations: one formulation, denoted as KDFT, is ...
Tianjian Lu +4 more
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Higher Order Convergent Fast Nonlinear Fourier Transform
, 2017 It is demonstrated is this letter that linear multistep methods for integrating ordinary differential equations can be used to develop a family of fast forward scattering algorithms with higher orders of convergence.
Vaibhav, Vishal
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