org.processmining.stream.model.datastructure.decay

Class ForwardExponentialDecayFunction

java.lang.Object

org.processmining.stream.model.datastructure.decay.ForwardExponentialDecayFunction

All Implemented Interfaces:

DecayFunction

public class ForwardExponentialDecayFunction
extends java.lang.Object
implements DecayFunction

forward exponential decay function. Based on: Forward Decay: A Practical Time Decay Model for Streaming Systems; G. Cormode et al.; doi: http://dx.doi.org/10.1109/ICDE.2009.65 form: exp(alpha * age);

Author:

svzelst

Nested Class Summary

Nested classes/interfaces inherited from interface org.processmining.stream.model.datastructure.decay.DecayFunction

DecayFunction.Type

Constructor Summary

Constructors

Constructor and Description
ForwardExponentialDecayFunction(double alpha)

Method Summary

Modifier and Type	Method and Description
double	evaluate(long age)
double	getAlpha()
DecayFunction.Type	getType()

Methods inherited from class java.lang.Object

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

Constructor Detail

ForwardExponentialDecayFunction

public ForwardExponentialDecayFunction(double alpha)

Method Detail

getAlpha

public double getAlpha()

evaluate

public double evaluate(long age)

Specified by:

evaluate in interface DecayFunction

getType

public DecayFunction.Type getType()

Specified by:

getType in interface DecayFunction