TERMIUM Plus®

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

DYNAMIC ERROR [6 records]

Record 1 2012-05-01

English

Subject field(s)
  • Information Processing (Informatics)
DEF

An error related to frequency such as the inadequate dynamic response of a functional unit.

French

Domaine(s)
  • Traitement de l'information (Informatique)
OBS

dynamique : capable de changer ou d'être modifié.

Spanish

Campo(s) temático(s)
  • Tratamiento de la información (Informática)
DEF

Error cometido por una unidad analógica a causa de una respuesta de frecuencia inadecuada por parte del equipo.

Save record 1

Record 2 2010-09-27

English

Subject field(s)
  • Scientific Research Methods
  • Optics
CONT

Temporal Paul wavelet analysis for instantaneous phase extraction using shadow moiré technique is proposed. Unlike the Morlet wavelet, the Paul wavelet has less restriction on the adjustment of wavelet parameters and can provide an optimal time and frequency resolution for a particular application by selecting the proper parameters. The Paul wavelet is a complex wavelet and is suitable for processing the temporal intensity data obtained from the shadow moiré technique for the phase retrieval. The proposed method can extract the phase information related to the state of the dynamic object at every instant in temporal domain. The phase information is associated to the displacement, three-dimensional(3D) surface-profile and the instantaneous state of the dynamic object. In addition, the instantaneous frequency of vibrating object can be obtained using the scale of the wavelet ridge by direct integration without temporal and spatial phase unwrapping. Thus the phase unwrapping error can be avoided. An experiment is conducted on the central loaded beam to demonstrate the validity of the proposed technique.

OBS

The term “moiré” is ... a French word referring to “an irregular wavy finish usually produced on a fabric by pressing between engraved rollers” (Webster’s 1981). In optics it refers to a beat pattern produced between two gratings of approximately equal spacing. It can be seen in everyday things such as the overlapping of two window screens, the rescreening of a half-tone picture, or with a striped shirt seen on television. The use of moiré for reduced sensitivity testing was introduced by Lord Rayleigh in 1874. Lord Rayleigh looked at the moiré between two identical gratings to determine their quality even though each individual grating could not be resolved under a microscope. ... Since Lord Rayleigh first noticed the phenomena of moiré fringes, moiré techniques have been used for a number of testing applications. Righi (1887) first noticed that the relative displacement of two gratings could be determined by observing the movement of the moiré fringes. The next significant advance in the use of moiré was presented by Weller and Shepherd (1948). They used moiré to measure the deformation of an object under applied stress by looking at the differences in a grating pattern before and after the applied stress. They were the first to use shadow moiré, where a grating is placed in front of a nonflat surface to determine the shape of the object behind it by using the shape of the moiré fringes.

French

Domaine(s)
  • Méthodes de recherche scientifique
  • Optique
CONT

Le moiré d’ombre. Cette technique […] consiste à créer un moiré entre une grille de référence placée juste devant l’objet, et l’ombre de cette même grille projetée sur la surface étudiée. Les déformations de cette surface modifient le pas du réseau «ombre» créant ainsi le moiré. Une mesure du pas de ce moiré permet, à l’aide des équations précédentes, de remont3er aux déformations locales et de dresser la carte des hauteurs.

CONT

Le moiré d’ombre. Il s’agit d’un dérivé (conceptuellement, pas historiquement) de la mesure de forme par projection de frange.

Spanish

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Record 3 2004-02-05

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
DEF

[In dynamic meteorology, ] types of error in data produced by imperfections in observing techniques(observational noise) or by fluctuations on smaller time-or space-scales than those being processed(meteorological noise).

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
DEF

[En météorologie dynamique,] types d'erreurs sur les données produits par les imperfections de la technique d'observation (bruit de la mesure) ou par les fluctuations intervenant à des échelles d'espace et de temps plus petites que celles traitées (bruit météorologique).

Spanish

Campo(s) temático(s)
  • Previsiones meteorológicas, medición y análisis de datos
DEF

En meteorología dinámica, [...] tipo de error en los datos debido a técnicas de observación defectuosas (ruido de las observaciones) o a fluctuaciones con escalas espaciales o de tiempo más pequeñas que las que se tratan (ruido meteorológico).

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Record 4 2003-01-06

English

Subject field(s)
  • Range Measurements (Telecommunications)
CONT

Sophisticated software that combines... a microwave tracking(step track algorithm) and inertial stabilization(IRU or rate gyros), for accurate and reliable satellite tracking, using extrapolation algorithm to minimize dynamic error.

French

Domaine(s)
  • Mesures à distance (Télécommunications)

Spanish

Save record 4

Record 5 2002-03-05

English

Subject field(s)
  • Computer Programs and Programming
DEF

An error that is independent of the time variable, as contrasted with a dynamic error.

French

Domaine(s)
  • Programmes et programmation (Informatique)

Spanish

Campo(s) temático(s)
  • Programas y programación (Informática)
DEF

Error cuyo origen es independiente de cualquier variable del tiempo asociada con su ejecución.

OBS

Este término es opuesto al de error dinámico (dynamic error).

Save record 5

Record 6 1993-10-31

English

Subject field(s)
  • Climatology
CONT

Noise : in dynamic meteorology, types of error in data, produced by imperfections in observing techniques(observational noise) or by fluctuations on smaller time or space scales than those required(meteorological noise).

OBS

Model noises are observational noises.

French

Domaine(s)
  • Climatologie
CONT

Bruit : en météorologie dynamique, types d'erreurs sur les données produits par les imperfections de la technique d'observation (bruit de la mesure) ou par les fluctuations intervenant à des échelles d'espace et de temps plus petites que nécessaires (bruit météorologique)

Spanish

Save record 6

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