Package dynheurset.update

Class PatientPhaseQualityIndexUpdate

java.lang.Object

dynheurset.update.Update

dynheurset.update.PhaseQualityIndexUpdate

dynheurset.update.PatientPhaseQualityIndexUpdate

public class PatientPhaseQualityIndexUpdate
extends PhaseQualityIndexUpdate

This class implements a patient phase-based quality index update strategy.

The active set is updated every phaseLen iterations. A patience factor is used to control how long the update strategy waits for the best solution to improve before updating the active set. The performance value of each heuristic is converted to indexes (ranks). Every heuristic that has its ranks below the average value multiplied by aspiration factor is not included in the active set.

Field Summary

Fields

Modifier and Type	Field	Description
protected double	patience	A patience factor controlling how long the update strategy waits for the best solution to improve before updating the active set.

Fields inherited from class dynheurset.update.PhaseQualityIndexUpdate

aspiration, phaseLen, util

Fields inherited from class dynheurset.update.Update

activeList, heurList, measure, numRemove, numReset, numUpdates, remove, reset, runStat

Constructor Summary

Constructors

Constructor	Description
PatientPhaseQualityIndexUpdate(double patience, int phaseLen, double aspiration)

Method Summary

Modifier and Type	Method	Description
boolean	canUpdate()	Returns true if the active set is to be updated and false otherwise.

Methods inherited from class dynheurset.update.PhaseQualityIndexUpdate

performUpdate, rank

Methods inherited from class dynheurset.update.Update

getActiveList, setHeurList, setMeasure, setRemove, setReset, setRunStat, updateActiveList

Methods inherited from class java.lang.Object

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

Field Details

patience

protected final double patience

A patience factor controlling how long the update strategy waits for the best solution to improve before updating the active set.

Constructor Details

PatientPhaseQualityIndexUpdate

public PatientPhaseQualityIndexUpdate(double patience, int phaseLen, double aspiration)

Method Details

canUpdate

public boolean canUpdate()

Description copied from class: Update

Returns true if the active set is to be updated and false otherwise.

In this method, you should use the RunStat field to access the run information that you may need to decides whether to update the active set.

Overrides:

canUpdate in class PhaseQualityIndexUpdate

Returns:

true if the active set is to be updated and false otherwise.