Package org.opt4j.optimizer.sa

Class SimulatedAnnealing

java.lang.Object

org.opt4j.core.optimizer.AbstractOptimizer

org.opt4j.optimizer.sa.SimulatedAnnealing

All Implemented Interfaces:

Optimizer

public class SimulatedAnnealing
extends AbstractOptimizer

The SimulatedAnnealing is a standard implementation of the optimization heuristic. This heuristic optimizes a single objective (multi-objective problems are optimized by the sum of all objectives).

Field Summary

Fields

Modifier and Type	Field	Description
protected final CoolingSchedule	coolingSchedule
protected final Copy<Genotype>	copy
protected final Neighbor<Genotype>	neighbor
protected final Random	random

Fields inherited from class org.opt4j.core.optimizer.AbstractOptimizer

archive, completer, control, iteration, iterationListeners, optimizing, population, stateListeners

Constructor Summary

Constructors

Constructor	Description
SimulatedAnnealing(Population population, Archive archive, IndividualFactory individualFactory, IndividualCompleter completer, Control control, Rand random, Neighbor<Genotype> neighbor, Copy<Genotype> copy, Iteration iteration, CoolingSchedule coolingSchedule)	Constructs a new SimulatedAnnealing.

Method Summary

Modifier and Type	Method	Description
protected double	f(Individual individual)	Calculates the sum of the Objectives of one Individual.
void	optimize()	Starts the optimization process.

Methods inherited from class org.opt4j.core.optimizer.AbstractOptimizer

addOptimizerIterationListener, addOptimizerStateListener, getIteration, injectListeners, isRunning, nextIteration, removeOptimizerIterationListener, removeOptimizerStateListener, startOptimization, stopOptimization

Methods inherited from class java.lang.Object

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

Field Details

random

protected final Random random

neighbor

protected final Neighbor<Genotype> neighbor

copy

protected final Copy<Genotype> copy

coolingSchedule

protected final CoolingSchedule coolingSchedule

Constructor Details

SimulatedAnnealing

@Inject
public SimulatedAnnealing(Population population,
 Archive archive,
 IndividualFactory individualFactory,
 IndividualCompleter completer,
 Control control,
 Rand random,
 Neighbor<Genotype> neighbor,
 Copy<Genotype> copy,
 Iteration iteration,
 CoolingSchedule coolingSchedule)

Constructs a new SimulatedAnnealing.

Parameters:

population - the population

archive - the archive

individualFactory - the individual factory

completer - the completer

control - the control

random - the random number generator

neighbor - the neighbor operator

copy - the copy operator

iteration - the iteration counter

coolingSchedule - the cooling schedule

Method Details

optimize

public void optimize()
              throws TerminationException,
StopException

Description copied from interface: Optimizer

Starts the optimization process.

Throws:

TerminationException - if the optimization is terminated

StopException - if the optimization is stopped

f

protected double f(Individual individual)

Calculates the sum of the Objectives of one Individual.

Parameters:

individual - the individual

Returns:

the sum of the objective values