Package jasima.core.simulation.arrivalprocess

Class ArrivalsNonStationary

java.lang.Object

jasima.core.random.continuous.DblSequence

jasima.core.simulation.arrivalprocess.ArrivalProcess

jasima.core.simulation.arrivalprocess.ArrivalsNonStationary

All Implemented Interfaces:

Serializable, Cloneable

public class ArrivalsNonStationary
extends ArrivalProcess

This class can be used to create a non-stationary arrival process, i.e., if (inter-)arrivals do not follow a single distribution. To do so, a DblStream with mean of 1 (e.g., an exponential distribution with rate 1) and the inverse cumulative expectation function have to be provided.

For details see, e.g., Law: "Simulation Modelling and Analysis", how to create non-stationary (Poisson) processes.

Author:

Torsten Hildebrandt, 2012-08-07

See Also:

Serialized Form

Field Summary

Fields inherited from class jasima.core.simulation.arrivalprocess.ArrivalProcess

isFirst, state

Fields inherited from class jasima.core.random.continuous.DblSequence

rndGen

Constructor Summary

Constructors

Constructor	Description
ArrivalsNonStationary()

Method Summary

Modifier and Type	Method	Description
DblSequence	clone()	Clones the current number stream.
org.apache.commons.math3.analysis.UnivariateFunction	getInverseCumulativeExpectation()
DblSequence	getUnitMeanDblStream()
void	init()	Initializes this stream.
double	nextDbl()	Returns the next number in this number stream.
void	setInverseCumulativeExpectation(org.apache.commons.math3.analysis.UnivariateFunction inverseCumulativeExpectation)	Sets the inverse cumulative expectation function.
void	setRndGen(Random rndGen)	Sets the random number generator to be used if this stream has a random component.
void	setUnitMeanDblStream(DblSequence unitMeanDblStream)	Sets the DblStream to use.

Methods inherited from class jasima.core.simulation.arrivalprocess.ArrivalProcess

getInitialState, getNumericalMean, getValueRange, isArrivalAtTimeZero, setArrivalAtTimeZero, setInitialState

Methods inherited from class jasima.core.random.continuous.DblSequence

createStreamDefFromStream, getName, getRndGen, max, min, setName

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrivalsNonStationary

public ArrivalsNonStationary()

Method Detail

nextDbl

public double nextDbl()

Description copied from class: DblSequence

Returns the next number in this number stream.

Specified by:

nextDbl in class ArrivalProcess

init

public void init()

Description copied from class: DblSequence

Initializes this stream. This method is supposed to be called once before repeated calls to DblSequence.nextDbl() can be made.

Overrides:

init in class ArrivalProcess

clone

public DblSequence clone()

Description copied from class: DblSequence

Clones the current number stream. This method fails with a CloneNotSupportedException if there is a random number generator associated with this stream.

Overrides:

clone in class DblSequence

getUnitMeanDblStream

public DblSequence getUnitMeanDblStream()

setUnitMeanDblStream

public void setUnitMeanDblStream(DblSequence unitMeanDblStream)

Sets the DblStream to use. This stream has to produce values with a mean of 1.

Parameters:

unitMeanDblStream -

getInverseCumulativeExpectation

public org.apache.commons.math3.analysis.UnivariateFunction getInverseCumulativeExpectation()

setInverseCumulativeExpectation

public void setInverseCumulativeExpectation(org.apache.commons.math3.analysis.UnivariateFunction inverseCumulativeExpectation)

Sets the inverse cumulative expectation function. This function has to be strictly monotonically increasing.

Parameters:

inverseCumulativeExpectation -

setRndGen

public void setRndGen(Random rndGen)

Description copied from class: DblSequence

Sets the random number generator to be used if this stream has a random component.

Overrides:

setRndGen in class DblSequence