haifa.shopsim.lab
Class ParetoRandomTimeMaker

java.lang.Object
  |
  +--haifa.shopsim.lab.AbstractRandomTimeMaker
        |
        +--haifa.shopsim.lab.ParetoRandomTimeMaker

All Implemented Interfaces:

RandomTimeMaker

Direct Known Subclasses:

Pareto2MomentsRandomTimeMaker, Pareto3MomentsRandomTimeMaker

public class ParetoRandomTimeMaker

extends AbstractRandomTimeMaker

Allows generation of heavy-tail R.V's. That is R.V's that do not have exponetial moments. The paretto distribution is used. The classes uses a pareto with paremeters alpha and mean which sets the lamda . With survival function (lamda/(lamda+x))^alpha.

Version:

0.60

Field Summary

protected double	alpha
private double	negAlphaInv The negative inverse of alpha

Fields inherited from class haifa.shopsim.lab.AbstractRandomTimeMaker

lastSeed, random

Constructor Summary

ParetoRandomTimeMaker(double alpha_)
Contstructs based on alpha parameter.

Method Summary

double

getTime(double mean) Returns a random pareto variable with mean.

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

alpha

protected double alpha

negAlphaInv

private final double negAlphaInv

The negative inverse of alpha

Constructor Detail

ParetoRandomTimeMaker

public ParetoRandomTimeMaker(double alpha_)

Contstructs based on alpha parameter.

Method Detail

getTime

public double getTime(double mean)

Returns a random pareto variable with mean.