subsampling alias

French translation: repliement lié au sous-échantillonnage

10:58 Nov 16, 2020
English to French translations [PRO]
Tech/Engineering - Mathematics & Statistics / oil spill modelling
English term or phrase: subsampling alias
The wind data is generated by interpolating multiple-satellite observations to fill in the temporal and spatial data gaps of individual-satellite samples and reduce the subsampling alias and random errors. The spill model reads spatially and temporally varying winds with values every six hours for the same period as current data
Neydou
France
Local time: 13:17
French translation:repliement lié au sous-échantillonnage
Explanation:
Suggestion
cf. p. 4 dans
https://www.lycee-champollion.fr/IMG/pdf/quantification_-_ec...
Selected response from:

Marielle Akamatsu
France
Local time: 13:17
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Summary of answers provided
4repliement lié au sous-échantillonnage
Marielle Akamatsu
Summary of reference entries provided
Wikipedia explanation
Tony M

Discussion entries: 2





  

Answers


22 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
repliement lié au sous-échantillonnage


Explanation:
Suggestion
cf. p. 4 dans
https://www.lycee-champollion.fr/IMG/pdf/quantification_-_ec...

Marielle Akamatsu
France
Local time: 13:17
Native speaker of: Native in FrenchFrench
PRO pts in category: 20
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Reference comments


30 mins
Reference: Wikipedia explanation

Reference information:
Wikipédia

Aliasing: In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or "aliases" of one another) when sampled. en.wikipedia.org

Repliement de spectre>/b>) : Le repli de spectre ("Aliasing" en anglais) est un phénomène qui introduit dans un signal qui module une fréquence porteuse ou dans un signal échantillonné des fréquences qui ne devraient pas s'y trouver, lorsque la fréquence porteuse ou la fréquence d'échantillonnage sont inférieures à deux fois la fréquence maximale contenue dans le signal.

Note that although this talks specifically in the field of electronic sampling, the same principle obtains in statistical sampling too, although the reference to 'spectre' may no longer be relevant. I suspect the use of 'repli' / 'repliement' is all that is needed in this field in FR.

This other reference, more related to statistics, may offer some understanding:


Sampling and Aliasing Sampling
www.cs.umd.edu › ~djacobs › CMSC427 › Aliasing

Need smoothing before subsampling to avoid aliasing. Page 14. •14. Slide 27. Lecture 13.

Tony M
France
Native speaker of: Native in EnglishEnglish
PRO pts in category: 8
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