TERMIUM Plus®

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CROSS-CORRELATION [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-02-09

English

Subject field(s)
  • Vulcanology and Seismology
  • Geophysics
DEF

A measure of degree of similarity between two functions.

CONT

Cross-correlation of two digital waveforms involves cross-multiplication of the individual waveform elements and summation of the cross-multiplication products over the common time interval of the waveforms.

French

Domaine(s)
  • Volcanologie et sismologie
  • Géophysique

Spanish

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Record 2 2010-09-22

English

Subject field(s)
  • Probability (Statistics)
OBS

For example, the time integral of the product of one signal and another related, but time-delayed, signal.

Key term(s)
  • crosscorrelation
  • cross correlation

French

Domaine(s)
  • Probabilités (Statistique)
CONT

La corrélation croisée est parfois utilisée en statistique pour désigner la covariance Cov(X,Y) des vecteurs aléatoires X et Y, afin de distinguer ce concept de la «covariance» d'un vecteur aléatoire X, laquelle est comprise comme étant la matrice des covariances des coordonnées de X.

Spanish

Campo(s) temático(s)
  • Probabilidad (Estadística)
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Record 3 1995-06-30

English

Subject field(s)
  • Silviculture
  • Chronology
DEF

The synchronisation of two ring patterns by means of a good visual agreement backed by a sound statistical test of significance, for the purpose of chronology building, comparison of chronologies, or dating.

CONT

The process of comparing the patterns of wide and narrow annual rings in one tree with those in another is called cross-dating and is the fundamental basis of dendrochronology.

CONT

Cross-dating means the synchronisation of two ring patterns by means of a good visual agreement backed by a sound statistical test of significance.

CONT

Any dendrochronological study involves the establishment of cross-correlations between ring patterns. This is true for chronology extension, dating against floating, or standard chronologies and comparison of chronologies from different areas .... Figure 2 shows a cross-correlation established on the basis of a signature pattern occurring in each of three Irish oak samples. The wide signature ring for the year A.D. 1580 is indicated in each case.

French

Domaine(s)
  • Sylviculture
  • Chronologie
DEF

Superposition de courbes dendrochronologiques dans leurs positions de correspondance maximale, pour des fins de constitution de chronologies, de vérification de chronologies ou de datation.

CONT

On peut donc, après avoir mesuré l'épaisseur des cernes sous microscope puis établi des diagrammes, comparer les rythmes de croissance d'une série d'échantillons dont on veut vérifier la contemporanéité. Cette opération visant ainsi l'établissement de chronologies relatives, se nomme «synchronisation» ou «interdatation» et est facilitée lorsqu'apparaissent des pics ou dépressions plus systématiquement marqués.

CONT

La synchronisation ou datation croisée consiste à identifier dans deux ou plusieurs courbes dendrochronologiques les séquences contemporaines. Cette synchronisation est basée sur un fait d'observation : quand on compare plusieurs courbes, le maximum de ressemblance est généralement atteint lorsqu'on les superpose exactement, années contemporaines sur années contemporaines. Dans ce cas, la plupart des points remarquables (maxima et minima) coïncident, de même que le sens de la variation d'épaisseur entre cernes consécutifs (variation positive ou négative).

Spanish

Save record 3

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