Class Summary Class Description HighEnergyModel This class represents the high-energy model.NaturalModel This class represents the natural model.PhysicalModel This abstract class represents a physical model.QuantumModel This class represents the quantum model.RelativisticModel This class represents the relativistic model.StandardModel This class represents the standard model.

## Package org.jscience.physics.model Description

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 `length`

and a `duration`

is not allowed by the standard model, but is quite valid in a relativistic context.

Models are `context-local`

, allowing multiple models to be used concurrently. For example:

` LocalContext.enter(); `**try** { RelativisticModel.select(); // Affects the current thread only. ... } **finally** { LocalContext.exit(); }

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 = \xc2\xb50 = hBar | Length, Duration: 1/GeV; Mass, Temperature, ElectricCurrent: GeV; AmountOfSubstance: mol; LuminousIntensity: cd |

Natural | "NaturalModel" | 1 = c = k = \xc2\xb50 = hBar = G | Length, Mass, Duration, ElectricCurrent, Temperature: 1; AmountOfSubstance: mol; LuminousIntensity: cd |

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