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Provides models for physical quantities.
The difference between models lies in the assumptions each makes and,
in consequence,the operations each permits. For example, the summation
of a {@link javax.measure.quantity.Length length} and a {@link javax.measure.quantity.Duration duration}
is not allowed by the standard model, but is quite valid in a relativistic context.
Models are {@link javolution.context.LocalContext context-local}, allowing
multiple models to be used concurrently. For example:[code]
LocalContext.enter();
try {
RelativisticModel.select(); // Affects the current thread only.
...
} finally {
LocalContext.exit();
}[/code]
The names and characteristics of the models are presented in the following table:
| Model |
Class |
Defining Characteristics |
Default Output Units |
| Standard |
"StandardModel" |
per Système Internationale |
Length: m;
Mass: kg;
Duration: s;
ElectricCurrent: A;
Temperature: K;
AmountOfSubstance: mol;
LuminousIntensity: cd
|
| Relativistic |
"RelativisticModel" |
1 = c |
Length,
Duration: s;
Mass: eV;
ElectricCurrent: A;
Temperature: K;
AmountOfSubstance: mol;
LuminousIntensity: cd
|
| High-Energy |
"HighEnergyModel" |
1 = c
= k
= ePlus
|
Length,
Duration: ns;
Mass,
Temperature: GeV;
ElectricCurrent: 1/ns;
AmountOfSubstance: mol;
LuminousIntensity: cd
|
| Quantum |
"QuantumModel" |
1 = c
= k
= µ0
= hBar
|
Length,
Duration: 1/GeV;
Mass,
Temperature,
ElectricCurrent: GeV;
AmountOfSubstance: mol;
LuminousIntensity: cd
|
| Natural |
"NaturalModel" |
1 = c
= k
= µ0
= hBar
= G
|
Length,
Mass,
Duration,
ElectricCurrent,
Temperature: 1;
AmountOfSubstance: mol;
LuminousIntensity: cd
|
|