TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

A lognormal error is usually assumed in the traditional stock–recruitment (SR) analysis. ... a positive bias results when [a] SR model with [a] lognormal error is used for fish recruitment prediction. Not only is this bias exponentially dependent on the structure of the model's residual variance and the historical SR data, it is also dependent on the specific value of spawner biomass used. ... a bias correction that is asymptotically unbiased with a finite-sample bias that is practically zero [is then derived]. Data from two Pacific salmon populations, southeast Alaska pink salmon ... and Chilko Lake sockeye salmon ... are used to demonstrate this approach. The results show that the relative bias is about 10% for a spawning biomass within the historical range and that the bias is substantial outside that data range. However, with the proposed bias correction, the bias is negligible both within (<0.1%) and outside of (<0.3%) the data range.  2, fiche 1, Anglais, - bias%20correction

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

For a material measure: the value V_c - V_n [hyphen on top of the letters Vc] that must be algebraically added to the designation (or nominal value) V_n of the material measure in order to make it coincide with the conventional true value V_c [hyphen on top of the letters Vc] of the measure. For a measuring instrument (other than a material measure): the value V_c - V_i [hyphen on top of the letters Vi] that must be added algebraically to the mean value V_i [hyphen on top of the letters Vi] of the indications of the instrument (assumed to be obtained without reading error) in order to make it coincide with the conventional true value V_c of the quantity measured.  1, fiche 2, Anglais, - bias%20correction

Record number: 2, Textual support number: 1 CONT

The bias correction of a measuring instrument is equal to the bias error with change of sign.  1, fiche 2, Anglais, - bias%20correction

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Pour une mesure matérialisée : valeur V_c - V_n [tiret au dessus de Vc] que l'on doit ajouter algébriquement à la dénomination (ou valeur nominale) V_n de la mesure matérialisée pour la faire coïncider avec la valeur conventionnellement vraie V_c [tiret au dessus de Vc] de cette mesure. Pour un appareil mesureur : valeur V_c - V_i [tiret au dessus de Vi] que l'on doit ajouter algébriquement à la valeur moyenne V_i [tiret au dessus de Vi] des indications de l'instrument (supposées obtenues sans erreur de lecture) pour la faire coïncider avec la valeur conventionnellement vraie V_c de la grandeur mesurée.  1, fiche 2, Français, - correction%20de%20justesse

Record number: 2, Textual support number: 1 CONT

La correction de justesse d'un instrument de mesurage est égale à l'erreur de justesse changée de signe.  1, fiche 2, Français, - correction%20de%20justesse

Record number: 2, Textual support number: 1 OBS

correction de justesse : recommandation internationale de la Troisième Conférence Internationale de Métrologie Légale, 1968.  2, fiche 2, Français, - correction%20de%20justesse

Fiche 2,  Justifications,  Espagnol