Package org.uma.jmetal.operator.crossover.impl

Class SBXCrossover

java.lang.Object

org.uma.jmetal.operator.crossover.impl.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	Description
SBXCrossover(double crossoverProbability, double distributionIndex)	Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RepairDoubleSolution solutionRepair)	Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RepairDoubleSolution solutionRepair, RandomGenerator<Double> randomGenerator)	Constructor
SBXCrossover(double crossoverProbability, double distributionIndex, RandomGenerator<Double> randomGenerator)	Constructor

Method Summary

Modifier and Type	Method	Description
double	crossoverProbability()
void	crossoverProbability(double probability)
double	distributionIndex()
void	distributionIndex(double distributionIndex)
List<DoubleSolution>	doCrossover(double probability, DoubleSolution parent1, DoubleSolution parent2)	doCrossover method
List<DoubleSolution>	execute(List<DoubleSolution> solutions)	Execute() method
int	numberOfGeneratedChildren()
int	numberOfRequiredParents()

Methods inherited from class java.lang.Object

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

Constructor Details

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 Details

crossoverProbability

public double crossoverProbability()

Specified by:

crossoverProbability in interface CrossoverOperator<DoubleSolution>

distributionIndex

public double distributionIndex()

crossoverProbability

public void crossoverProbability(double probability)

distributionIndex

public void distributionIndex(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

numberOfRequiredParents

public int numberOfRequiredParents()

Specified by:

numberOfRequiredParents in interface CrossoverOperator<DoubleSolution>

numberOfGeneratedChildren

public int numberOfGeneratedChildren()

Specified by:

numberOfGeneratedChildren in interface CrossoverOperator<DoubleSolution>