org.uma.jmetal.operator.impl.crossover

Class SBXCrossover

java.lang.Object

org.uma.jmetal.operator.impl.crossover.SBXCrossover

All Implemented Interfaces:

Serializable, CrossoverOperator<DoubleSolution>, Operator<List<DoubleSolution>,List<DoubleSolution>>

public class SBXCrossover
extends Object
implements CrossoverOperator<DoubleSolution>

This class allows to apply a SBX crossover operator using two parent solutions (Double encoding). A RepairDoubleSolution object is used to decide the strategy to apply when a value is out of range. The implementation is based on the NSGA-II code available in http://www.iitk.ac.in/kangal/codes.shtml

Author:

Antonio J. Nebro , Juan J. Durillo

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SBXCrossover(double crossoverProbability, double distributionIndex) Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RandomGenerator<Double> randomGenerator) Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RepairDoubleSolution solutionRepair) Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RepairDoubleSolution solutionRepair, RandomGenerator<Double> randomGenerator) Constructor

Method Summary

Modifier and Type	Method and Description
List<DoubleSolution>	doCrossover(double probability, DoubleSolution parent1, DoubleSolution parent2) doCrossover method
List<DoubleSolution>	execute(List<DoubleSolution> solutions) Execute() method
double	getCrossoverProbability()
double	getDistributionIndex()
int	getNumberOfParents() Two parents are required to apply this operator.
void	setCrossoverProbability(double probability)
void	setDistributionIndex(double distributionIndex)

Methods inherited from class java.lang.Object

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

Constructor Detail

SBXCrossover

public SBXCrossover(double crossoverProbability,
                    double distributionIndex)

Constructor

SBXCrossover

public SBXCrossover(double crossoverProbability,
                    double distributionIndex,
                    RandomGenerator<Double> randomGenerator)

Constructor

SBXCrossover

public SBXCrossover(double crossoverProbability,
                    double distributionIndex,
                    RepairDoubleSolution solutionRepair)

Constructor

SBXCrossover

public SBXCrossover(double crossoverProbability,
                    double distributionIndex,
                    RepairDoubleSolution solutionRepair,
                    RandomGenerator<Double> randomGenerator)

Constructor

Method Detail

getCrossoverProbability

public double getCrossoverProbability()

getDistributionIndex

public double getDistributionIndex()

setCrossoverProbability

public void setCrossoverProbability(double probability)

setDistributionIndex

public void setDistributionIndex(double distributionIndex)

execute

public List<DoubleSolution> execute(List<DoubleSolution> solutions)

Execute() method

Specified by:

execute in interface Operator<List<DoubleSolution>,List<DoubleSolution>>

Parameters:

solutions - The data to process

doCrossover

public List<DoubleSolution> doCrossover(double probability,
                                        DoubleSolution parent1,
                                        DoubleSolution parent2)

doCrossover method

getNumberOfParents

public int getNumberOfParents()

Two parents are required to apply this operator.

Specified by:

getNumberOfParents in interface CrossoverOperator<DoubleSolution>

Returns: