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POINT SIGNIFICANCE [9 records]

Record 1 1997-02-12

English

Subject field(s)
  • Chemistry
CONT

Capillary condensation is said to occur when, in porous solids, multilayer adsorption from a vapour proceeds to the point at which pore spaces are filled with liquid separated from the gas phase by menisci. The concept loses its sense when the dimensions of the pores are so small that the term meniscus ceases to have a physical significance. Capillary condensation is often accompanied by hysteresis.

French

Domaine(s)
  • Chimie
CONT

On dit qu'il se produit une condensation capillaire lorsque, dans des solides poreux, il se produit une adsorption de couches multiples telle que les espaces poreux sont remplis de liquide séparé du gaz par un ménisque.

Spanish

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Record 2 1994-07-08

English

Subject field(s)
  • Computer Graphics
  • Mathematics
CONT

A number is complex when it is made up of two parts, which are called real and imaginary. These terms no longer have any special significance : the two parts of a complex number might as well be called Humpty and Dumpty. Thus 7 + 4i is a complex number with real part 7(Humpty) and imaginary part 4i(Dumpty). The i next to the 4 shows which part of the complex number is imaginary. Every complex number can be represented by a point in the plane; the plane of complex numbers is called the complex plane... The complex plane is an unaccountable infinity of such numbers. Their real parts and their inspima parts can be either positive or negative and either whole numbers or decimal expansions.

French

Domaine(s)
  • Infographie
  • Mathématiques
DEF

Plan dont les points sont représentés par des nombres complexes.

PHR

vivre dans un plan complexe.

PHR

plan complexe D'Argand-Gauss.

Spanish

Save record 2

Record 3 1994-02-24

English

Subject field(s)
  • Mathematics
  • Computer Graphics
CONT

Representing the evolution in time of a dynamic system by left shifts of the digits in a suitable number system brings out another important property of systems for which such a representation is possible. No matter how accurately the initial condition x0 of a coordinate is known, the accuracy will always be finite, that is, the digits of x0 to the right of the last known digit will be unknown. As the dynamic system evolves in time, the unknown digits will be shifted to the left; that is, they will grow in significance, and will sooner or later arrive at the "decimal" point and thus dominate the behavior of the system. And because the digits are unknown, this behavior will be completely unpredictable. The resulting motion is called chaotic.

French

Domaine(s)
  • Mathématiques
  • Infographie
DEF

Se dit de structures ou de systèmes dont on ne peut prédire l'évolution à partir d'un état initial donné, ni d'états connus pour une longue période de temps, et dans lesquels un changement infime, se propageant en cascade, peut provoquer des modifications subites importantes.

OBS

Qualifie une situation qui évolue de façon irrégulière, mais dont les lois sous-jacentes sont relativement simples et ne laissent aucune place au hasard. Ainsi, un régime périodique peut devenir chaotique par intensification de déstabilisations intermittentes, par cascade de doublement de période ou via la quasi-périodicité. S'oppose à «non chaotique». Certains auteurs attribuent à ce terme le sens «erratique», «aléatoire», «désordonné» (sens usuel en langage courant).

PHR

attracteur, caractère, changement, comportement, condition, dynamique, état, évolution, fluctuation, forme, nature, orbite, potentialité, processus, régime, réseau faiblement chaotique, réseau fortement chaotique, série, situation, système, trajectoire chaotique.

Spanish

Save record 3

Record 4 1991-09-25

English

Subject field(s)
  • Statistical Surveys

French

Domaine(s)
  • Sondages et enquêtes (Statistique)

Spanish

Save record 4

Record 5 1991-09-19

English

Subject field(s)
  • Statistical Surveys

French

Domaine(s)
  • Sondages et enquêtes (Statistique)

Spanish

Save record 5

Record 6 1991-09-18

English

Subject field(s)
  • Quantum Statistics

French

Domaine(s)
  • Statistique quantique

Spanish

Save record 6

Record 7 1991-09-03

English

Subject field(s)
  • Statistical Surveys

French

Domaine(s)
  • Sondages et enquêtes (Statistique)

Spanish

Save record 7

Record 8 1985-05-30

English

Subject field(s)
  • Air Pollution
CONT

On a national basis the overall accuracy of the current Canadian SO2 emissions inventory is estimated to be + 30% at a 75% confidence level(2) The accuracy varies widely for each sector of emissions and within each sector, and is far greater for the major point sources..., which together represent more than half of total Canadian emissions, than for sources of lesser significance. An uncertainty analysis has not been carried out for NOx emissions.

French

Domaine(s)
  • Pollution de l'air

Spanish

Save record 8

Record 9 1975-03-11

English

Subject field(s)
  • Personnel and Job Evaluation
OBS

--numbers, works, or phrases used to tell the rater the significance of making his rating at a given point.

French

Domaine(s)
  • Évaluation du personnel et des emplois
OBS

les termes descriptifs choisis pour indiquer les --doivent être de nature à inciter les chefs à utiliser toute la gamme.

Spanish

Save record 9

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