fractional Fourier transform
The fractional Fourier transform and quadratic field magnetic resonance imaging
... The fractional Fourier transform (FrFT) is an extension of the Fourier transform first developed by Kober [1] in the late thirties and rediscovered by Namias [2] in the late ...the ...
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Application of the fractional Fourier transform to image reconstruction in MRI
... difficult to achieve, particularly for short bore magnets and higher fields. When the passive or active shimming are not enough, or when the inhomogeneity comes from differences in susceptibility between adjacent regions ...
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Metodología de reconocimiento de patrones basada en máscaras binarias vía transformada fraccional de FourierPattern recognition methodology based on binary masks from the fractional Fourier transform
... the fractional Fourier transform was implemented, which is a generalization of the conventional Fourier ...the fractional Fourier transform of the spectral image, which is ...
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Correlación bidimensional para el reconocimiento de objetos mediante la transformada fraccional de FourierBidimensional correlation for objects recognition using the fractional Fourier transform
... Este trabajo tiene como principal objetivo el reconocimiento de imágenes digitales mediante una metodología denominada “correlación fraccional”, la cual consiste en realizar correlaciones utilizando la transformada ...
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Continuous vs. discrete fractional Fourier transforms
... Fractional Fourier–Kravchuk transforms of nite-oscillator Kravchuk coherent states are shown in ...the fractional Fourier integral transform of a Gaussian with the same center and width ...
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Images encryption system based on a fractional joint transform correlator and nonlinear filtering
... de Fourier (fractional Fourier transform, FrFT) con un orden fraccionario específico, que viene definido entre otros parámetros por la distancia focal y la posición de la lente en el montaje, ...
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TítuloVehicle Classification using the Discrete Fourier Transform with Traffic Inductive Sensors
... Abstract: Inductive Loop Detectors (ILDs) are the most commonly used sensors in traffic management systems. This paper shows that some spectral features extracted from the Fourier Transform (FT) of ...
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Time and spatial filtering for echo reduction in antenna measurements
... The classical time gating method is based on the Fourier Transform from frequency domain to time domain. Each sample (for different positions of AUT and/or antenna probe) is acquired at several frequencies. ...
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Matemáticas avanzadas para ingeniería-O'Neil
... Después de la publicación del artículo se encontró que algunos de los conceptos fundamentales del método, o similares a él, ya habían aparecido en otros contextos. El mismo Tukey ha contado que Phillip Rudnick, del ...
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An extension of some properties for the Fourier transform operator on $L^p(\mathbb{R})$ spaces
... R ) + L 2 ( R ). Thus, the Fourier transform cannot be fixed on HK( R ) by means of equation (2.2). On the other hand, L p ( R ) 6⊂ HK( R ), for 1 6= p > 0, so L p ( R ) + L ∞ ( R ) 6⊂ HK( R ). In this ...
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Fourier-Transform spectrometer implemented in silicon-based spiral waveguides
... In this work we present the design, fabrication and characterization of a Fourier-Transform micro- spectrometer implemented with planar waveguides. The device comprises an array of 32 Mach- Zehnder ...
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Fourier transform microwave spectroscopy of Ac Ser NH2: the role of side chain interactions in peptide folding
... was prepared by pressing the compound’s fine powder mixed with a small amount of commercial binders and was placed in the ablation nozzle. A picosecond Nd:YAG laser (10 mJ per pulse, 20 ps pulse width) was used as a ...
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A Parallel Framework with Block Matrices of a Discrete Fourier Transform for Vector Valued Discrete Time Signals
... Copyright © 2015 Pablo Soto-Quiros. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the ...
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A thermostable laccase from Thermus sp. 2.9 and its potential for delignifcation of Eucalyptus biomass
... Laccases are multicopper oxidases that are being studied for their potential application in pretreatment strategies of lignocellulosic feedstocks for bioethanol production. Here, we report the expression and ...
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Water-Induced Structural Changes in Crown Ethers from Broadband Rotational Spectroscopy
... Fast Fourier transformation to the frequency domain yielded the rotational spectrum of all polar species sufficiently abundant in our jet, such as conformers, clusters with different amounts of water molecules ...
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Picolinic and Isonicotinic Acids: A Fourier Transform Microwave Spectroscopy Study
... 8 have been studied using broadband chirped pulse (CP-FTMW) and narrowband 9 molecular beam (MB-FTMW) Fourier transform microwave spectroscopies. Two 10 conformers of picolinic acid, s-cis-I and s-cis-II, ...
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Contribución a la cancelación de errores en medida de antenas en campo próximo mediante técnicas de filtrado
... términos de error más importantes (“18-term error budget”), que se ha utilizado ampliamente en análisis posteriores y ha sido aceptado entre expertos. En este artículo, el impacto de cada error de campo cercano respecto ...
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Fourier analysis and the fast Fourier transform
... Fast Fourier Transform ...of Fourier transforms of vast data sets, such as those describing large-size two-dimensional images, in amazingly short ...of Fourier analysis, namely the (continu- ...
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Capitulo 11 Aplicaciones con la DFT (V13_02_02)
... de Fourier, designada con frecuencia por la abreviatura DFT (del inglés Discrete Fourier Transform), y a la que en ocasiones se denomina transformada de Fourier finita, es una operación ...
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Temperature drift compensation in Fourier-transform integrated micro-spectrometers
... En este trabajo, analizamos el efecto de las variaciones de temperatura en un micro-espectrómetro de transformada de Fourier espacialmente heterodino integrado en un chip de silicio sobre aislante. El dispositivo ...
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