TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

ECHANTILLON APPRENTISSAGE [2 records]

Record 1 2023-07-28

English

Subject field(s)
  • Artificial Intelligence
CONT

The bias-variance tradeoff is a fundamental problem in machine learning and statistics. It is the problem of finding a model that accurately predicts the target function while also minimizing the number of errors. The tradeoff is between the model's ability to fit the data (bias) and the model's ability to generalize to new data (variance).

French

Domaine(s)
  • Intelligence artificielle
DEF

Problème qui consiste à minimiser simultanément la variance et le biais qui empêchent les algorithmes d’apprentissage supervisé de généraliser au-delà de leur échantillon d’apprentissage.

Spanish

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Record 2 2022-09-12

English

Subject field(s)
  • Statistical Methods
CONT

In k-fold cross-validation, the original sample is randomly partitioned into k equal sized subsamples. Of the k subsamples, a single subsample is retained as the validation data for testing the model, and the remaining k − 1 subsamples are used as training data. The cross-validation process is then repeated k times, with each of the k subsamples used exactly once as the validation data. The k results can then be averaged to produce a single estimation.

French

Domaine(s)
  • Méthodes statistiques
CONT

La validation croisée à k blocs, «k-fold cross-validation» : on divise l'échantillon original en k échantillons(ou «blocs»), puis on sélectionne un des k échantillons comme ensemble de validation pendant que les k − 1 autres échantillons constituent l'ensemble d’apprentissage. Après apprentissage, on peut calculer une performance de validation. Puis on répète l'opération en sélectionnant un autre échantillon de validation parmi les blocs prédéfinis. À l'issue de la procédure[, ] nous obtenons ainsi k scores de performances, un par bloc. La moyenne et l'écart type des k scores de performances peuvent être calculés pour estimer le biais et la variance de la performance de validation.

Spanish

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