Nov 16, 2020 10:58
3 yrs ago
15 viewers *
English term
subsampling alias
English to French
Tech/Engineering
Mathematics & Statistics
oil spill modelling
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
Proposed translations
(French)
| 4 | repliement lié au sous-échantillonnage |
Marielle Akamatsu
|
References
| Wikipedia explanation |
Tony M
|
Proposed translations
22 hrs
Selected
repliement lié au sous-échantillonnage
4 KudoZ points awarded for this answer.
Reference comments
30 mins
Reference:
Wikipedia explanation
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.
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.
Discussion
In statistical analysis, subsampling per se is fairly unlikely to cause bias; however, 'aliasing' is a common problem with various types of sampling, in various fields.