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

Class FuzzyRecombinationCrossover

java.lang.Object

org.uma.jmetal.operator.crossover.impl.FuzzyRecombinationCrossover

All Implemented Interfaces:

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

public class FuzzyRecombinationCrossover
extends Object
implements CrossoverOperator<DoubleSolution>

This class implements the Fuzzy Recombination (FR) operator for real-valued solutions. FR is a real-parameter crossover operator that uses fuzzy connectives to combine parent solutions, providing a flexible way to control exploration and exploitation.

Reference: Herrera, F., Lozano, M., invalid input: '&' Verdegay, J. L. (1998). Tackling real-coded genetic algorithms: Operators and tools for behavioural analysis. Artificial intelligence review, 12(4), 265-319.

Author:

Antonio J. Nebro

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FuzzyRecombinationCrossover(double crossoverProbability)	Constructor with default parameter values
FuzzyRecombinationCrossover(double crossoverProbability, double alpha, RepairDoubleSolution solutionRepair)	Constructor with all parameters
FuzzyRecombinationCrossover(double crossoverProbability, double alpha, RepairDoubleSolution solutionRepair, RandomGenerator<Double> randomGenerator)	Constructor with all parameters including random generator (for testing)

Method Summary

Modifier and Type	Method	Description
double	alpha()
double	crossoverProbability()
List<DoubleSolution>	execute(List<DoubleSolution> solutions)
int	numberOfGeneratedChildren()
int	numberOfRequiredParents()

Methods inherited from class java.lang.Object

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

Constructor Details

FuzzyRecombinationCrossover

public FuzzyRecombinationCrossover(double crossoverProbability)

Constructor with default parameter values

Parameters:

crossoverProbability - Crossover probability (must be in [0,1])

FuzzyRecombinationCrossover

public FuzzyRecombinationCrossover(double crossoverProbability,
 double alpha,
 RepairDoubleSolution solutionRepair)

Constructor with all parameters

Parameters:

crossoverProbability - Crossover probability (must be in [0,1])

alpha - Controls the spread of the fuzzy membership function (typically in [0.5, 2.0])

solutionRepair - Strategy for repairing solutions

FuzzyRecombinationCrossover

public FuzzyRecombinationCrossover(double crossoverProbability,
 double alpha,
 RepairDoubleSolution solutionRepair,
 RandomGenerator<Double> randomGenerator)

Constructor with all parameters including random generator (for testing)

Parameters:

crossoverProbability - Crossover probability (must be in [0,1])

alpha - Controls the spread of the fuzzy membership function

solutionRepair - Strategy for repairing solutions

randomGenerator - Random number generator

Method Details

execute

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

Specified by:

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

Parameters:

solutions - The data to process

crossoverProbability

public double crossoverProbability()

Specified by:

crossoverProbability in interface CrossoverOperator<DoubleSolution>

numberOfRequiredParents

public int numberOfRequiredParents()

Specified by:

numberOfRequiredParents in interface CrossoverOperator<DoubleSolution>

numberOfGeneratedChildren

public int numberOfGeneratedChildren()

Specified by:

numberOfGeneratedChildren in interface CrossoverOperator<DoubleSolution>

alpha

public double alpha()

Returns:

The alpha parameter (spread of the fuzzy membership function)