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CORRELATION SIGNAL [8 records]

Record 1 2020-10-30

English

Subject field(s)
  • Target Acquisition
CONT

[The] automatic target tracker(ATT) is one... improvement in main [the] battle tank... ATT performs normalized area correlation algorithm on real time video and computes the deviation of target with respect to bore-sight(tracking window) and sends error signal to the main sight system.

French

Domaine(s)
  • Acquisition d'objectif

Spanish

Save record 1

Record 2 2017-05-18

English

Subject field(s)
  • Remote Sensing
DEF

A remote-sensing term referring to the process of assigning different colours to different spectral bands.

CONT

The image processing consisted in generating intensity images and one coherence image. To facilitate their analysis and interpretation, a coloured composition has been created with the results. This composition is obtained by adding the coherence image in red, the average of both images phase intensities in green and the difference between these phase intensities in blue. As such, a high coherence level(value close to 1) appears in red and indicates a very good phase correlation between the two images, a consequence of the various mechanisms of radar signal scattering and of the lack of change which could affect the target. On the contrary, a weak coherence level(value tending to 0) appears in black and indicates a movement in these zones during the 24 hours interval which separated the two image shots. Lastly, the white spots correspond to areas with a strong radar signal backscattering i. e. with zones of hills or vegetation.

Key term(s)
  • color composition
  • colored composition

French

Domaine(s)
  • Télédétection
CONT

Dans les systèmes de télédétection, nous avons vu qu'il est possible de détecter et d'enregistrer des parties du spectre électromagnétique qui ne sont pas décelables à l'oeil nu, comme l'infrarouge par exemple. Pour pouvoir visualiser cette information, on associe aux bandes spectrales du système d'observation des couleurs d'affichage (rouge-vert-bleu), qui ne leur correspondent pas nécessairement. Ce faisant, on crée des compositions colorées [...]

Spanish

Save record 2

Record 3 2012-02-17

English

Subject field(s)
  • Magnetic Resonance Imaging
CONT

3D flash imaging at high spatial resolution shows good anatomical correlation of signal increase with gray matter of the motor and sensory cortex.

French

Domaine(s)
  • Imagerie par résonance magnétique

Spanish

Save record 3

Record 4 2011-07-05

English

Subject field(s)
  • Scientific Instruments
  • Destructive and Non-destructive Tests (Mat.)
  • Wood Industries
DEF

An apparatus used for making hardness tests on timber.

CONT

Hardness.... With the change to SI units a special hardened steel tool(known as the Janka hardness tool) rounded to a diameter of 11. 3 mm(projected area 100 mm2) is embedded to one-half of its diameter into the(20 mm) test piece. This tool has a device embodying an electrical contact which rings a signal bell when the correct depth of penetration has been reached... The hardness test is performed... on the static bending specimen... there is a very good correlation between the side hardness of timber, as determined by the Janka hardness tool, and its compression strength perpendicular to the grain.

French

Domaine(s)
  • Instruments scientifiques
  • Contrôle destructif et non destructif (Matér.)
  • Industrie du bois
OBS

duromètre : nom générique des appareils de mesure de dureté.

Spanish

Save record 4

Record 5 2002-03-06

English

Subject field(s)
  • Radio Transmission and Reception
  • Acoustics (Physics)
CONT

The laboratory and Scientific Services Directorate(LSSD) of the Canada Customs and Revenue Agency(CCRA) has a requirement for a CEDAR-Audio for Forensics system. This system is integral to the enhancement of audio information recorded along with video. CEDAR-Audio is the only system that provides hardware deterministic audio digital signal processing which is an essential requirement for video to audio time correlation.

French

Domaine(s)
  • Émission et réception radio
  • Acoustique (Physique)
DEF

En télécommunication, rapport de durée existant entre les interfaces des signaux audio et vidéo.

CONT

Diffusion d'images ou de fichiers. Ils permettent de créer et d'accepter des sessions multimédia entre utilisateurs. S'il est des outils, comme les tableaux blancs partagés qui ne demandent aucune ressource particulière et qui fonctionnent parfaitement à travers l'Internet, il n'en est pas de même avec ceux transportant de la voix ou de la vidéo : outre que se pose le problème du support par ces outils des différentes interfaces audio et vidéo existants, ils s'appuient, pour transmettre des données à forte corrélation temporelle, sur un réseau qui n'assure aucune garantie de ce type.

Spanish

Save record 5

Record 6 1991-05-28

English

Subject field(s)
  • Radio Interference
  • Computer Graphics
DEF

Noise whose direct consequence is to diminish the signal to noise ratio : it manifests itself in the form of peaks surrounding the central correlation peak.

French

Domaine(s)
  • Perturbations radio
  • Infographie

Spanish

Save record 6

Record 7 1989-11-15

English

Subject field(s)
  • Strength of Materials
OBS

With the change to SI units a special hardened steel tool(known as the Janka hardness tool) rounded to a diameter of 11. 3 mm(projected area 100 mm2) is embedded to one-half of its diameter into the(20mm) test piece... an electrical contact... rings a signal bell when the correct depth of penetration has been reached... the hardness test is performed... on the static bending specimen.... The rate of penetration of the ball is 0. 11 mm/s... there is a very good correlation between the side hardness of timber, as determined by the Janka hardness tool, and its compression strength perpendicular to the grain.

French

Domaine(s)
  • Résistance des matériaux
OBS

Mesure de la dureté des métaux. On applique, sur une surface légèrement polie du métal (...) une bille en acier spécial très dur (...) sous une charge déterminée. Il se forme alors dans la pièce une empreinte permanente, en forme de calotte sphérique [méthode de Brinell] (...)

Spanish

Save record 7

Record 8 1984-08-22

English

Subject field(s)
  • Radio Transmission and Reception
  • Telecommunications Facilities
CONT

The correlation receiver provides an undistorted delayed replica of the transmitted signal s(t) for each signal path delay time td of interest.

French

Domaine(s)
  • Émission et réception radio
  • Installations de télécommunications

Spanish

Save record 8

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