net.sourceforge.cilib.pso.velocityupdatestrategies
Class FDRVelocityUpdateStrategy

java.lang.Object
  net.sourceforge.cilib.pso.velocityupdatestrategies.StandardVelocityUpdate
      net.sourceforge.cilib.pso.velocityupdatestrategies.FDRVelocityUpdateStrategy

All Implemented Interfaces:

Serializable, VelocityUpdateStrategy, Cloneable

public class FDRVelocityUpdateStrategy
extends StandardVelocityUpdate

Implementation of the FDR-PSO velocity update equation.

BibTex entry:
@ARTICLE{1202264,
title={Fitness-distance-ratio based particle swarm optimization},
author={Peram, T. and Veeramachaneni, K. and Mohan, C.K.},
journal={Swarm Intelligence Symposium, 2003. SIS '03. Proceedings of the 2003 IEEE},
year={2003},
month={April},
volume={},
number={},
pages={ 174-181},
abstract={ This paper presents a modification of the particle swarm optimization algorithm (PSO) intended to combat the problem of premature convergence observed in many applications of PSO. The proposed new algorithm moves particles towards nearby particles of higher fitness, instead of attracting each particle towards just the best position discovered so far by any particle. This is accomplished by using the ratio of the relative fitness and the distance of other particles to determine the direction in which each component of the particle position needs to be changed. The resulting algorithm (FDR-PSO) is shown to perform significantly better than the original PSO algorithm and some of its variants, on many different benchmark optimization problems. Empirical examination of the evolution of the particles demonstrates that the convergence of the algorithm does not occur at an early phase of particle evolution, unlike PSO. Avoiding premature convergence allows FDR-PSO to continue search for global optima in difficult multimodal optimization problems.},
keywords={ convergence of numerical methods, evolutionary computation, optimisation, search problems FDR-PSO, fitness-distance ratio, global optima search, multimodal optimization problems, particle position, particle swarm optimization, premature convergence, relative fitness},
doi={10.1109/SIS.2003.1202264},
ISSN={ }, }


Author:

Olusegun Olorunda

See Also:

Serialized Form

Field Summary

protected ControlParameter

fdrMaximizerAcceleration

Fields inherited from class net.sourceforge.cilib.pso.velocityupdatestrategies.StandardVelocityUpdate

cognitiveAcceleration, inertiaWeight, socialAcceleration, vMax

Constructor Summary

FDRVelocityUpdateStrategy()

FDRVelocityUpdateStrategy(FDRVelocityUpdateStrategy copy)

Method Summary

FDRVelocityUpdateStrategy	getClone() Clone the VelocityUpdateStrategy object.
ControlParameter	getFdrMaximizerAcceleration()
void	setFdrMaximizerAcceleration(ControlParameter fdrMaximizerAcceleration)
void	updateControlParameters(Particle particle) Update the associated ControlParameters for the VelocityUpdateStrategy.
void	updateVelocity(Particle particle) Perform the velocity update for the given Particle.

Methods inherited from class net.sourceforge.cilib.pso.velocityupdatestrategies.StandardVelocityUpdate

clamp, getCognitiveAcceleration, getInertiaWeight, getSocialAcceleration, getVMax, setCognitiveAcceleration, setInertiaWeight, setSocialAcceleration, setVMax

Methods inherited from class java.lang.Object

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

Field Detail

fdrMaximizerAcceleration

protected ControlParameter fdrMaximizerAcceleration

Constructor Detail

FDRVelocityUpdateStrategy

public FDRVelocityUpdateStrategy()

FDRVelocityUpdateStrategy

public FDRVelocityUpdateStrategy(FDRVelocityUpdateStrategy copy)

Method Detail

getClone

public FDRVelocityUpdateStrategy getClone()

Clone the VelocityUpdateStrategy object.

Specified by:

getClone in interface VelocityUpdateStrategy

Specified by:

getClone in interface Cloneable

Overrides:

getClone in class StandardVelocityUpdate

Returns:

A cloned VelocityUpdateStrategy

See Also:

Object.clone()

updateVelocity

public void updateVelocity(Particle particle)

Perform the velocity update for the given Particle.

Specified by:

updateVelocity in interface VelocityUpdateStrategy

Overrides:

updateVelocity in class StandardVelocityUpdate

Parameters:

particle - The Particle velocity that should be updated.

updateControlParameters

public void updateControlParameters(Particle particle)

Update the associated ControlParameters for the VelocityUpdateStrategy. Update the needed control parameters for the VelocityUpdate, if needed.

Specified by:

updateControlParameters in interface VelocityUpdateStrategy

Overrides:

updateControlParameters in class StandardVelocityUpdate

Parameters:

particle - The particle for whom the VelocityUpdateStrategy parameters need to be updated.

getFdrMaximizerAcceleration

public ControlParameter getFdrMaximizerAcceleration()

Returns:

the fdrMaximizerAcceleration

setFdrMaximizerAcceleration

public void setFdrMaximizerAcceleration(ControlParameter fdrMaximizerAcceleration)

Parameters:

fdrMaximizerAcceleration - the fdrMaximizerAcceleration to set