TERMIUM Plus^®

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Application of the Cooley-Tukey algorithm to Fourier transforms.  3, record 1, English, - fast%20Fourier%20transform

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Algorithme qui calcule la transformation de Fourier discrète avec précision et efficacité sur les ordinateurs numériques.  2, record 1, French, - transformation%20de%20Fourier%20rapide

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Método particular de la transformación de Fourier que permite su cálculo en un tiempo corto.  2, record 1, Spanish, - transformaci%C3%B3n%20de%20Fourier%20r%C3%A1pida

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It is the most performed digital signal processing operation. See Fast Fourier Transform(FFT), Fourier transform.  3, record 2, English, - discrete%20Fourier%20transform

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inverse discrete Fourier transform(IDFT).  4, record 2, English, - discrete%20Fourier%20transform

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Dans la pratique et avec la généralisation des techniques de numérisation, on remplace souvent la fonction dont on veut calculer la transformée de Fourier par un échantillonnage. L'intégrale de Fourier est alors remplacée par une somme finie appelée transformée de Fourier discrète.  4, record 2, French, - transform%C3%A9e%20de%20Fourier%20discr%C3%A8te

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Actualmente el [espectrómetro] más utilizado es el espectrómetro Raman de transformada de Fourier [...].  1, record 3, Spanish, - espectr%C3%B3metro%20Raman%20de%20transformada%20de%20Fourier

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Une parmi les différentes approches pour implémenter la FFT [transformée de Fourier rapide] consiste à concevoir un processeur de transformée de Fourier rapide (FFT) qui fournit un débit de débit élevé [...] en appliquant l'approche pipeline de huit voies pour les applications de réseau sans fil [...]  2, record 4, French, - processeur%20de%20transform%C3%A9e%20de%20Fourier%20rapide

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In the commonly used segment Fourier transform method for rainbow hologram reconstruction, the computation of 2D [two dimensional] Fourier transform on each hologram segment is very time consuming.  2, record 5, English, - hologram%20segment

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A … joint transform correlator where separate lenses are used to Fourier transform the object and template images.  2, record 6, English, - dual%2Daxis%20correlator

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SITELLE will be an imaging Fourier transform spectrometer capable of obtaining the visible(350 nm – 950 nm) spectrum of every source of light in a field of view of 15 arcminutes, with 100% spatial coverage and a spectral resolution ranging from R=1(deep panchromatic image) to R=104(for gas dynamics).  1, record 7, English, - SITELLE

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La spectroscopie par transformée de Fourier (STF) est une [...] technique permettant de mesurer le spectre d'absorption, de diffusion, ou d'émission d'un solide, d'un liquide ou d'un gaz. [...] elle exploite le concept d'espace de Fourier.  1, record 8, French, - spectroscopie%20par%20transform%C3%A9e%20de%20Fourier

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La spectroscopie par transformée de Fourier est la technique de choix pour mesurer un spectre infrarouge. [Toutefois,] le principe de mesure ne restreint pas l'application de la STF à l'infrarouge [...]  1, record 8, French, - spectroscopie%20par%20transform%C3%A9e%20de%20Fourier

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El fundamento de las técnicas por transformada de Fourier está en el interferómetro que Michelson y Moreley construyeron hace más de un siglo (1887) para demostrar el movimiento de la Tierra con relación al éter, con el cual intentaban poner de manifiesto cómo la velocidad de propagación de la luz con respecto a la Tierra variaba con la dirección.  1, record 8, Spanish, - espectroscopia%20por%20transformada%20de%20Fourier

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FT-IR is used to obtain an absorption or transmission of a solid or liquid. An FT-IR spectrometer simultaneously collects data over a wide spectral range.  2, record 9, English, - Fourier%20transform%20infrared%20spectrometer

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Fourier transform infrared spectrometer; FTIR : designation and abbreviation extracted from the "Disarmament and Peace Keeping" glossary with the permission of the United Nations Office at Geneva.  4, record 9, English, - Fourier%20transform%20infrared%20spectrometer

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Un spectromètre FTIR permet de collecter simultanément les données spectrales sur un spectre large.  4, record 9, French, - spectrom%C3%A8tre%20infrarouge%20%C3%A0%20transform%C3%A9e%20de%20Fourier

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spectromètre infrarouge à transformée de Fourier; spectromètre infrarouge par transformée de Fourier; IRTF : désignations et abréviation tirées du lexique «Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.  5, record 9, French, - spectrom%C3%A8tre%20infrarouge%20%C3%A0%20transform%C3%A9e%20de%20Fourier

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A spectrometer in which radiation is separated into its component wavenumbers by Fourier transformation of the interferogram produced by an interferometer.  3, record 10, English, - Fourier%20transform%20spectrometer

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Fourier transform spectrometer; FTS : designation and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).  4, record 10, English, - Fourier%20transform%20spectrometer

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spectromètre à transformée de Fourier; FTS : désignation et abréviation uniformisées par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 10, French, - spectrom%C3%A8tre%20%C3%A0%20transform%C3%A9e%20de%20Fourier

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Un espectrómetro por transformada de Fourier consta de tres elementos básicos: una fuente luminosa, un interferómetro de Michelson y un detector.  1, record 10, Spanish, - espectr%C3%B3metro%20por%20transformada%20de%20Fourier

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… a technique that is used to obtain an infrared spectrum of absorption, emission, photoconductivity or Raman scattering of a solid, liquid or gas.  2, record 11, English, - Fourier%20transform%20infrared%20spectroscopy

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[…] technique utilisée pour obtenir un spectre infrarouge d'absorption, d'émission, de photoconductivité ou de diffusion Raman d'un solide, liquide ou gaz.  8, record 11, French, - spectroscopie%20infrarouge%20%C3%A0%20transform%C3%A9e%20de%20Fourier

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La espectroscopía infrarrojo por transformada de Fourier (FTIR) es una técnica que se basa en detectar las vibraciones moleculares; la información se obtiene al hacer incidir radiación infrarroja, a una energía en particular, a través de una muestra y se determina la fracción absorbida de la radiación incidente.  2, record 11, Spanish, - espectroscopia%20infrarrojo%20por%20transformar%20de%20Fourier

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A plot of the magnitude and phase of the Fourier transform of a function.  2, record 12, English, - Fourier%20spectrum

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Si l'on «écoutait» […] un système stochastique, notre oreille pourrait distinguer éventuellement des notes de hauteur (de fréquence) bien définies, mais nous entendrions en outre un «bruit» un peu comparable à celui d'un torrent. Si l'on représente sur un graphe l'énergie de vibration en fonction de la fréquence, on obtient le spectre de Fourier […]  2, record 12, French, - spectre%20de%20Fourier

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Appareil [permettant d'obtenir] le spectre d’absorption, d'émission, [de] photoconductivité ou [de] diffusion dans l'infrarouge d'un échantillon solide, liquide ou gazeux.  2, record 14, French, - spectrophotom%C3%A8tre%20infrarouge%20%C3%A0%20transform%C3%A9e%20de%20Fourrier

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L'enregistrement holographique utilise la propriété de réduction des données caractéristique des représentations interférentielles et exprimées mathématiquement par la méthode des transformations de Fourier.  2, record 15, French, - m%C3%A9thode%20des%20transformations%20de%20Fourier

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The capability for accurate mass measurements is an important attribute of Fourier transform mass spectrometry(FTMS). Unlike other instrumental methods in mass spectrometry, FTMS... offers significant opportunities to improve mass measurement accuracy …  3, record 16, English, - Fourier%20transform%20mass%20spectrometry

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To study systems with large mass-to-charge ratios or systems that have very complicated isotope patterns, we need a spectrometer with the ability to accurately determine masses so we can be sure we are studying the right ion. For this we use a Fourier transform ion cyclotron resonance mass spectrometer(FT-ICR MS). In this technique, the mass-to-charge ratio(m/z) of an ion can be experimentally determined by measuring the frequency at which the ion processes in a magnetic field.  1, record 17, English, - Fourier%20transform%20ion%20cyclotron%20resonance%20mass%20spectrometer

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Fourier transform ion cyclotron resonance mass spectrometry … determines the [mass-to-charge] ratio of ions by measuring the cyclotron frequency of the ions in a fixed magnetic field. The method differs significantly from other mass spectrometry techniques in that the ions are indirectly detected by the measurement of the cyclotron(rotational) frequency that they produce as they rotate in a magnetic field.  1, record 18, English, - Fourier%20transform%20ion%20cyclotron%20resonance%20mass%20spectrometry

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A space which is linear, metric and complete.  2, record 19, English, - Hilbert%20space

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In mathematics, a Hilbert space is an inner product space that is complete with respect to the norm defined by the inner product. Hilbert spaces serve to clarify and generalize the concept of Fourier expansion and certain linear transformations such as the Fourier transform.  3, record 19, English, - Hilbert%20space

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En théorie quantique, espace linéaire, métrique et complet des états d'un système physique.  2, record 19, French, - espace%20de%20Hilbert

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Selon D. Hilbert [...] l'état d'un tel système peut être stationnaire (son attracteur est un point fixe), périodique (son attracteur est un cycle limite), quasi périodique (son attracteur est un tore) ou chaotique (son attracteur est étrange). Chaque état peut être représenté par un vecteur normé. Le produit scalaire hilbertien de deux vecteurs fournit l'amplitude de probabilité de la transition entre les deux états physiques qu'ils représentent. Tout espace préhilbertien séparé de dimension finie est un espace hilbertien.  2, record 19, French, - espace%20de%20Hilbert

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espace hilbertien complexe, espace hilbertien muni de la norme euclidienne, espace hilbertien réel  2, record 19, French, - espace%20de%20Hilbert

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In coherent optical data processing the input to the processor is a two-dimensional transmittance variation that may be proportional to the irradiance variation or the amplitude variation of the signal. The processor is usually a Fourier transform processor...  1, record 20, English, - Fourier%20transform%20processor

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Processing of MRI data is usually performed in an array processor using the Fast Fourier Transform(FFT) algorithm. These computational requirements generally require the input data to be in a matrix whose dimensions are a power of 2, such as 128x128, 256x256, or 512x512. If the acquired k-space data does not complete this matrix, it is customary to fill in the missing cells with zeroes, a technique called zero padding, zero filling, or zero-interpolation filling(ZIP).  2, record 21, English, - zero%20filling

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Remplissage des lignes ou des portions non utilisées du plan de Fourier par des zéros [...]  1, record 21, French, - remplissage%20par%20des%20z%C3%A9ros

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A type of two-way frequency transform for identifying and removing unwanted spatial frequency components in an image.  3, record 23, English, - Fourier%20transform

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The Fourier process is normally used to identify and remove systematic noise spikes, such as regular lines that may have been introduced by a faulty image collection device. The process works as a two-way operation. First the forward transform creates a pair of intermediate raster objects that reveal abnormal data variability. After the values in those raster objects have been edited to remove the data spikes, the inverse transformation creates a raster object with the same image as the original, but with lines or other noise removed.  3, record 23, English, - Fourier%20transform

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Fourier transform; FT : term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).  4, record 23, English, - Fourier%20transform

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Type de transformée de fréquence bidirectionnelle qui identifie et enlève les composantes de fréquence spatiale non désirées dans une image.  3, record 23, French, - transform%C3%A9e%20de%20Fourier

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[La transformée] de Fourier permet d'avoir des informations fréquentielles et bidirectionnelles sur les fluctuations des données à l'intérieur de la fenêtre d'analyse.  4, record 23, French, - transform%C3%A9e%20de%20Fourier

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transformée de Fourier; TF : terme et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 23, French, - transform%C3%A9e%20de%20Fourier

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Comparer «trans-Fourier directe  3, record 24, French, - int%C3%A9grale%20de%20Fourier

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SCISAT-1 is the first new Canadian scientific satellite since the ISIS-II mission in 1971.... The satellite will be carrying a customized Canadian-built Fourier Transform Spectrometer(ACE-FTS) as part of the Atmospheric Chemistry Experiment(ACE) mission, which will run at least two years.(The feasibility of including a second scientific instrument, Measurements of Aerosol Extinction in the Stratosphere and Troposhere Retrieved by Occulation(MAESTRO), is being evaluated.) The ACE mission's goal is to take a variety of measurements in the Earth's stratosphere and troposhere to advance scientist's understanding of ozone depletion, particularly above Canada and the Arctic region.  2, record 25, English, - SCISAT%2D1%20satellite

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Les instruments scientifiques canadiens à bord du satellite SCISAT-1 aideront les chercheurs canadiens et internationaux à étudier le phénomène de la réduction de la couche d'ozone dans l'atmosphère.  1, record 25, French, - satellite%20SCISAT%2D1

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La recherche entreprise sur l'ozone par la mission SCISAT sera dirigée par Peter Bernath, de l'Université de Waterloo, à la tête d'une équipe scientifique internationale de chercheurs. Le spectromètre à transformée de Fourier (ACE-FTS), construit par ABB Bomem de Québec, est le principal instrument de la mission de l'expérience sur la chimie atmosphérique (ACE) effectuée à bord de SCISAT. MAESTRO (Mesure de l'extinction des aérosols par occultation dans la stratosphère et dans la troposphère) [...]  3, record 25, French, - satellite%20SCISAT%2D1

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Energy dispersive extended X-ray absorption fine structure spectroscopy(ED-XAFS), diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS) and mass spectrometry(MS), have been combined for the structure-function study of Rh and RhPd supported catalysts for the reduction of NO by CO.  1, record 26, English, - energy%20dispersive%20extended%20X%2Dray%20absorption%20fine%20structure%20spectroscopy

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L'EXAFS dispersif permet d'obtenir en une seule mesure la totalité d'un spectre EXAFS. L'utilisation de barrettes de photodiode comme détecteur permet d'utiliser le faisceau intense du rayonnement synchrotron et de réduire ainsi le temps de mesure. Ceci permet des études cinétiques comme dans le cas de la pré-précipitation des alliages Al-Zn.  2, record 26, French, - EXAFS%20dispersif

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EXAFS [...] méthode d'analyse spectroscopique utilisant le rayonnement synchrotron [qui] apporte des informations sur des composés et leur voisinage proche, contrairement à des méthodes telles que la diffraction de rayons X (XRD) qui nécessite une structure régulière du matériau.  3, record 26, French, - EXAFS%20dispersif

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Migrating from single pixel FTS to IFTS merely consists in adding pixels at the output. In the seventies, solar observatories already equipped with FTS have tested multi-pixels detectors with mitigated success.  2, record 27, English, - single%20pixel%20Fourier%20transform%20spectrometer

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Fourier-transform spectrometer(FTS) : A spectrometer to measure the concentration, or determine the nature of particularly complex chemical substances by the use of the Fourier transform.  3, record 27, English, - single%20pixel%20Fourier%20transform%20spectrometer

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spectromètre à transformée de Fourier à pixel unique : équivalent proposé par le fabricant ABB.COM.  1, record 27, French, - spectrom%C3%A8tre%20%C3%A0%20transform%C3%A9e%20de%20Fourier%20%C3%A0%20pixel%20unique

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Mathematical space in which the Fourier transform of the image is presented.  2, record 28, English, - k%2Dspace

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Simply speaking, k-space is the temporary image space in which data from digitized MR [magnetic resonance] signals are stored during data acquisition. When k-space is full (at the end of the scan), the data are mathematically processed to produce a final image. Thus k-space holds raw data before reconstruction.  3, record 28, English, - k%2Dspace

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The interest of a ground based Slit Aperture Telescope(SAT) which operates with a long thin pupil has been underlined for applications in the field of high angular resolution observations by speckle-interferometric techniques. The SAT lies halfway between the Michelson stellar interferometer and the standard telescope with circular aperture. The authors present the principle of an image processing algorithm which could be used associated with a space-SAT for astronomical image reconstruction. A full coverage of the two dimensional Fourier plane of the astronomical object can be obtained by rotating the SAT around its optical axis. The method of image reconstruction is analogous to those used in computerized tomography and uses Fast Fourier Transform algorithm. The interest of the use of a rotating space-SAT among synthetic apertures is its capability of giving a reconstructed image of the astronomical object simultaneously in several light wavelengths, each colored image being comparable with the others for fruitful astrophysical applications.  3, record 29, English, - slit%20aperture%20telescope

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Le télescope à pupille fente fournit des images unidimensionnelles et opère en synthèse d'ouverture. En l'absence de turbulence atmosphérique, l'image focale fournie par un télescope à pupille fente est quasiment une projection unidimensionnelle de l'objet observé. Après une rotation complète autour de son axe optique, on obtient un ensemble de projections de l'objet observé qui n'est autre que la transformée de Radon de l'objet.  1, record 29, French, - t%C3%A9lescope%20%C3%A0%20pupille%20fente

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... the capability to perform vibrational spectroscopic measurements during reaction with Fourier transform infrared(FTIR) spectroscopy is available in the atmospheric pressure reactor.  1, record 30, English, - atmospheric%20pressure%20reactor

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The study of the non-radiative de-excitation processes which take place after samples have absorbed radiation and the release of this absorbed energy by thermal transfer ... producing an acoustic signal which can be detected and measured.  1, record 31, English, - photoacoustic%20spectroscopy

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CANMET scientists characterized coal samples using Fourier transform infrared spectroscopy and surface techniques such as photo-acoustic and diffuse reflectance spectroscopies.  2, record 31, English, - photoacoustic%20spectroscopy

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En spectroscopie photo-acoustique, l'échantillon est placé dans une cellule remplie de gaz où est situé un microphone. L'échantillon est irradié par le faisceau laser continu [...] Le microphone va détecter le changement de pression du gaz lié à la variation de température causée par l'échauffement périodique de l'échantillon avec lequel il est en contact.  2, record 31, French, - spectroscopie%20photo%2Dacoustique

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Les chercheurs du CANMET ont caractérisé des échantillons de charbon en utilisant la spectroscopie infrarouge à transformer de Fourier ainsi que des techniques de mesures superficielles comme la spectroscopie photo-acoustique et la spectroscopie de réflectance diffuse.  3, record 31, French, - spectroscopie%20photo%2Dacoustique

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CANMET scientists characterized coal samples using Fourier transform infrared spectroscopy and surface techniques such as photo-acoustic and diffuse reflectance spectroscopies.  2, record 32, English, - diffuse%20reflectance%20spectroscopy

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Les chercheurs du CANMET ont caractérisé des échantillons de charbon en utilisant la spectroscopie infrarouge à transformer de Fourier ainsi que des techniques de mesures superficielles comme la spectroscopie photo-acoustique et la spectroscopie de réflectance diffuse.  3, record 32, French, - spectroscopie%20par%20r%C3%A9flectance%20diffuse

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Treatment of Fourier transform spectra, when the experimental conditions have varied during the recording of the interferogram(signal non-linearity, variation of the source intensity, changes inside the absorption cell...).  2, record 33, English, - absorption%20cell

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Traitement de spectres par transformation de Fourier, lorsque les conditions expérimentales ont varié pendant l'enregistrement de l'interférogramme (non linéarité du signal, variation de l'intensité de la source, changements à l'intérieur de la cuve d'absorption...).  2, record 33, French, - cuve%20d%27absorption

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The removal of water following washing of coal.  3, record 34, English, - dewatering

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Understanding the behaviour of oxidized coals during upgrading and dewatering processes enables researchers to develop techniques to improve recovery ratios. CANMET scientists characterized coal samples using Fourier transform infrared spectroscopy and surface techniques such as photo-acoustic and diffuse reflectance spectroscopies.  4, record 34, English, - dewatering

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Vibrating screens are used to remove free water, with larger particles over 1 cm (1/2 in) diameter dried to about 4%, and smaller particles dried to about 10%. Additional water removal can be by centrifugal action as well as heated air drying.  3, record 34, English, - dewatering

Record 34,  Textual support,  French

Record number: 34, Textual support number: 1 CONT

La compréhension du comportement des charbons oxydés pendant l'amélioration et la déshydratation permet aux chercheurs de mettre au point des techniques visant à améliorer le taux de récupération. Les chercheurs du CANMET ont caractérisé des échantillons de charbon en utilisant la spectroscopie infrarouge à transformée de Fourier ainsi que des techniques de mesures superficielles comme la spectroscopie photo-acoustique et la spectroscopie de réflectance diffuse.  1, record 34, French, - d%C3%A9shydratation

Record 34,  Textual support,  Spanish

Record 35,  Textual support,  English

Record number: 35, Textual support number: 1 DEF

Image transformation assigning a new intensity value to each pixel based on a global property of the image.  2, record 35, English, - global%20operation

Record number: 35, Textual support number: 1 OBS

Global properties include gray value distribution and spatial frequency distribution as in the pixel histogram and Fourier transform and correlation.  2, record 35, English, - global%20operation

Record 35,  Textual support,  French

Record 35,  Textual support,  Spanish

Record 36,  Textual support,  English

Record 36,  Textual support,  French

Record number: 36, Textual support number: 1 OBS

Dans la pratique et avec la généralisation des techniques de numérisation, on remplace souvent la fonction dont on veut calculer la transformée de Fourier par un échantillonnage. L'intégrale de Fourier est alors remplacée par une somme finie appelée transformée de Fourier discrète. Des algorithmes, dont l'ensemble est appelée transformée de Fourier rapide (anglais Fast Fourier Transform - FFT), ont été mis au point, permettant de réduire le temps d'exécution du calcul d'une transformée de Fourier discrète.  4, record 36, French, - transform%C3%A9e%20de%20Fourier

Record 36,  Textual support,  Spanish

Record number: 36, Textual support number: 1 DEF

Relación matemática entre la energía en un transitorio y la de un espectro de energía continua de frecuencias de componente adyacente.  3, record 36, Spanish, - transformaci%C3%B3n%20de%20Fourier

Record 37,  Textual support,  English

Record number: 37, Textual support number: 1 DEF

A video compression algorithm similar to Fast Fourier Transform(FFT) but easier to compute.  2, record 37, English, - discrete%20cosine%20transformation

Record number: 37, Textual support number: 1 OBS

The Dictionary of New Media (source code: MODIN) is available at: <a href="http://hepdigital.com/" title="http://hepdigital.com">http://hepdigital.com</a>.  5, record 37, English, - discrete%20cosine%20transformation

Record 37,  Textual support,  French

Record number: 37, Textual support number: 1 DEF

Algorithme de compression vidéo ressemblant à la transformation de Fourier rapide mais qui est plus facile à calculer.  3, record 37, French, - transform%C3%A9e%20en%20cosinus%20discr%C3%A8te

Record 37,  Textual support,  Spanish

Record 38,  Textual support,  English

Record number: 38, Textual support number: 1 DEF

Square of the amplitude of the Fourier transform of an aperiodic function containing finite total energy...  1, record 38, English, - energy%20spectrum

Record 38,  Textual support,  French

Record number: 38, Textual support number: 1 DEF

Carré de l'amplitude de la transformée de Fourier d'une fonction apériodique contenant une énergie totale finie [...]  1, record 38, French, - spectre%20d%27%C3%A9nergie

Record 38,  Textual support,  Spanish

Record number: 38, Textual support number: 1 DEF

Cuadrado de la amplitud de la transformada de Fourier de una función aperiódica que contiene energía total finita [...]  1, record 38, Spanish, - espectro%20de%20la%20energ%C3%ADa

Record 39,  Textual support,  English

Record number: 39, Textual support number: 1 CONT

The present work aims at trying out Acoustic Impact Technique as a possible means of deployment at field level for the purpose of flaw detection in composite helicopter blades. The principle underlying Acoustic Impact Testing is simple. The sound produced when a structure is tapped is mainly at the frequencies of major structural modes of vibration, which are structural properties. Any difference in the sound is necessarily due to modification affected to the force input by the defect in the structure. A study of the force time history of response or its fast fourier transform makes it possible to locate and detect sub surface flaws.  3, record 39, English, - acoustic%20impact%20technique

Record number: 39, Textual support number: 1 OBS

Type of non-destructive material testing.  4, record 39, English, - acoustic%20impact%20technique

Record 39,  Textual support,  French

Record number: 39, Textual support number: 1 OBS

Essai non destructif de matériel astronautique.  2, record 39, French, - technique%20du%20choc%20acoustique

Record 39,  Textual support,  Spanish

Record 40,  Textual support,  English

Record number: 40, Textual support number: 1 DEF

The rate per second at which sampling occurs during the digitization process.  4, record 40, English, - sampling%20rate

Record number: 40, Textual support number: 1 OBS

Audio digitizing may involve sampling of 16 bits of data at rates as high as 48,000 times per second.  4, record 40, English, - sampling%20rate

Record number: 40, Textual support number: 2 OBS

If the sampling rate is high and if the signal was observed for a long time, the discrete Fourier series and the discrete Fourier transform provide good approximations of the true spectrum.  5, record 40, English, - sampling%20rate

Record 40,  Textual support,  French

Record number: 40, Textual support number: 1 CONT

L'échantillonnage d'un son consiste à enregistrer sa valeur à intervalles réguliers sous forme numérique. La fréquence d'échantillonnage est le nombre d'échantillons prélevés par seconde. Plus cette fréquence est élevée, plus l'enregistrement est fidèle à l'original, et inversement.  3, record 40, French, - fr%C3%A9quence%20d%27%C3%A9chantillonnage

Record 40,  Textual support,  Spanish

Record number: 40, Textual support number: 1 DEF

Frecuencia entre las mediciones de los valores registrados y todos los valores disponibles.  3, record 40, Spanish, - tasa%20de%20muestreo

Record number: 40, Textual support number: 1 CONT

Si una variable es medida cada milisegundo, la frecuencia de muestreo es de mil mediciones por segundo.  3, record 40, Spanish, - tasa%20de%20muestreo

Record 41,  Textual support,  English

Record number: 41, Textual support number: 1 CONT

The transform is closely related to the Fourier transform; it plays a role in coding signals and images in the widely used standard JPEG compression  1, record 41, English, - discrete%20cosine%20transform

Record 41,  Textual support,  French

Record number: 41, Textual support number: 1 CONT

La transformée DCT (Direct Cosine Transform) est un cas particulier de la transformée de Fourier, qui dans certaines conditions, décompose le signal en une série de fonctions uniquement cosinus et en phase avec le signal d'origine, ce qui réduit de moitié le nombre des coefficients nécessaires. Dans le cas des images, on utilise une DCT bidirectionnelle qui transformera un bloc de NxN pixels (de luminance ou de chrominance) en un autre bloc de NxN coefficients correspondant à l'amplitude des fonctions harmoniques dans l'espace transformé.  1, record 41, French, - transform%C3%A9e%20DCT

Record 41,  Textual support,  Spanish

Record 42,  Textual support,  English

Record number: 42, Textual support number: 1 OBS

e. g. gas chromatography-mass spectrometry(GC-MS) ;gas chromatography-Fourier Transform Infrared chromatography(GC-FTIR)  1, record 42, English, - combination%20of%20instruments

Record 42,  Textual support,  French

Record number: 42, Textual support number: 1 OBS

chromatographie en phase gazeuse - spectrométrie de masse (CPG-SM); chromatographie en phase gazeuse - chromatographie infrarouge à transformée de Fourier (CPG-IRTF), par exemple  1, record 42, French, - instruments%20coupl%C3%A9s

Record number: 42, Textual support number: 2 OBS

Reproduit du lexique «Disarmament and Peace Keeping/Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.  2, record 42, French, - instruments%20coupl%C3%A9s

Record 42,  Textual support,  Spanish

Record 43,  Textual support,  English

Record number: 43, Textual support number: 1 CONT

This course is designed for chemistry students wishing to become familiar with the use of high resolution nuclear magnetic resonance(NMR) spectroscopy and mass spectrometry for the determination of molecular structure and dynamics in solution. The NMR part of the course deals with analysis of second-order proton spectra, with extraction of coupling constants and chemical shifts from spectra. Then the topics of pulsed and Fourier transform NMR are introduced and applied to natural abundance 13C spectra. Problem solving with combined 1H and 13C NMR data is emphasized. Subsequently the use of spin lattice relaxation times for dynamics is discussed, followed by an introduction to 2 dimensional(2D) NMR.  1, record 43, English, - 2%20dimensional%20NMR

Record 43,  Textual support,  French

Record number: 43, Textual support number: 1 CONT

La RMN à deux dimensions peut être comparée à une réaction chimique, dont les composantes doivent être identifiées (ici par fréquence)avant et après la réaction.[...] Notons par ailleurs que la RMN 2D n'est pas limitée à l'observation des protons : deux expériences de corrélation ont été conçues pour relier des azotes, des carbones et des protons.  1, record 43, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire%20bidimensionnelle

Record number: 43, Textual support number: 1 OBS

Terme et exemple tirés du «Technoscope».  1, record 43, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire%20bidimensionnelle

Record 43,  Textual support,  Spanish

Record 44,  Textual support,  English

Record number: 44, Textual support number: 1 DEF

To read a large data file entirely into core before working on it. This may be contrasted with the strategy of reading a small piece at a time, processing it, and then reading the next piece.  2, record 44, English, - slurp

Record number: 44, Textual support number: 1 CONT

"This program slurps in a 1024-by-1024 matrix of numbers and then crunches them using an FFT(Fast Fourier Transform).  2, record 44, English, - slurp

Record 44,  Textual support,  French

Record number: 44, Textual support number: 1 DEF

Lire un très gros fichier en mémoire avant de le traiter. S'oppose à la stratégie qui consiste à lire et traiter le fichier par morceaux.  2, record 44, French, - boire%20%C3%A0%20grand%20bruit

Record number: 44, Textual support number: 1 CONT

Ce programme engloutit une matrice de 1K sur 1K et fait une transformée de Fourier rapide.  2, record 44, French, - boire%20%C3%A0%20grand%20bruit

Record 44,  Textual support,  Spanish

Record 45,  Textual support,  English

Record number: 45, Textual support number: 1 OBS

FFT : fast Fourier transform.  2, record 45, English, - 8k%20FFT

Record 45,  Textual support,  French

Record number: 45, Textual support number: 1 OBS

TFR: transformation de Fourier rapide.  2, record 45, French, - TFR%208k

Record 45,  Textual support,  Spanish

Record 46,  Textual support,  English

Record number: 46, Textual support number: 1 OBS

Global properties include gray value distribution and spatial frequency distribution as in the pixel histogram and Fourier transform.  1, record 46, English, - global%20transformation

Record 46,  Textual support,  French

Record number: 46, Textual support number: 1 DEF

Transformation d'image assignant à chaque pixel une nouvelle valeur qui est fonction des valeurs de tous les pixels de l'image. [ISO/CEI JTC N1746, 1995]  1, record 46, French, - transformation%20globale

Record 46,  Textual support,  Spanish

Record 47,  Textual support,  English

Record number: 47, Textual support number: 1 CONT

A case of Ramsay-Hunt syndrome has been studied with pre-and postcontrasts MR imaging, using a three-dimensional Fourier transform fast imaging with steady precession sequence with axially oriented sections and coronal reformatted images.(In Journal of computer assisted tomography, 1993, 17(3) 495-497, cited in PASCAL data base.)  2, record 47, English, - reformatted%20image

Record number: 47, Textual support number: 2 CONT

The reformatted images and direct cross sectional images show evidence of an anterior spondylolisthesis of L5 on S1.  1, record 47, English, - reformatted%20image

Record 47,  Textual support,  French

Record number: 47, Textual support number: 1 OBS

Proposition découlant d'entretiens avec des spécialistes.  1, record 47, French, - image%20reconstruite

Record 47,  Textual support,  Spanish

Record 48,  Textual support,  French

Record 48,  Textual support,  Spanish

Record 49,  Textual support,  English

Record number: 49, Textual support number: 1 DEF

Pattern discrimination that is the Fourier transform of a linear combination of a selection from the set of input images.  1, record 49, English, - synthetic%20discriminant%20function

Record 49,  Textual support,  French

Record 49,  Textual support,  Spanish

Record 50,  Textual support,  French

Record 50,  Textual support,  Spanish

Record 51,  Textual support,  English

Record number: 51, Textual support number: 1 DEF

The Fourier transform of an image that is expressed as a function of logarithmically scaled co-ordinates.  2, record 51, English, - Mellin%20transform

Record 51,  Textual support,  French

Record 51,  Textual support,  Spanish

Record 52,  Textual support,  English

Record number: 52, Textual support number: 1 DEF

An instrument based on the principle of the Michelson interferometer that will give images in which each pixel is interferometer that will give images in which each pixel is the whole spectrum of the observed point on Earth.  1, record 52, English, - Fourier%20transform%20spectro%2Dimager

Record 52,  Textual support,  French

Record 52,  Textual support,  Spanish

Record 53,  Textual support,  French

Record 53,  Textual support,  Spanish

Record 54,  Textual support,  English

Record number: 54, Textual support number: 1 CONT

The acousto-optical convolutor described here is a dual-channel SAW light modulator, in which spatial filtering is performed on the Fourier transform plane.  1, record 54, English, - convolutor

Record 54,  Textual support,  French

Record number: 54, Textual support number: 1 DEF

Appareil permettant d'obtenir le produit de convolution de deux grandeurs analogiques.  1, record 54, French, - convolueur

Record number: 54, Textual support number: 1 CONT

Le calcul optique d'un produit peut se faire à l'aide de plusieurs montages de base, différant principalement par la variable (espace ou temps) dont dépendent les grandeurs d'entrée (S) et de sortie (R), ainsi que la variable d'intégration. a) convolueur spatial: c'est un convolueur dans lequel les signaux d'entrée et de sortie sont des signaux spatiaux [...] b) convolueur temporel à intégration spatiale [...] c) convolueur spatio-temporel à intégration temporelle (ou «copie mobile»).  2, record 54, French, - convolueur

Record 54,  Textual support,  Spanish

Record 55,  Textual support,  French

Record 55,  Textual support,  Spanish

Record 56,  Textual support,  French