net.sourceforge.cilib.pso.velocityupdatestrategies
Class GCVelocityUpdateStrategy

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

All Implemented Interfaces:

Serializable, VelocityUpdateStrategy, Cloneable

public class GCVelocityUpdateStrategy
extends StandardVelocityUpdate

An implementation of the Guaranteed Convergence PSO algorithm. The GCPSO is a simple extension to the normal PSO algorithm and the modifications to the algorithm is implemented as a simple VelocityUpdateStrategy

References:

• F. van den Bergh and A. Engelbrecht, "A new locally convergent particle swarm optimizer," in Proceedings of IEEE Conference on Systems, Man and Cybernetics, (Hammamet, Tunisia), Oct. 2002.
• F. van den Bergh, "An Analysis of Particle Swarm Optimizers," PhD thesis, Department of Computer Science, University of Pretoria, South Africa, 2002.

See Also:

Serialized Form

Field Summary

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

cognitiveAcceleration, inertiaWeight, socialAcceleration, vMax

Constructor Summary

GCVelocityUpdateStrategy()
Create an instance of the GC Velocity Update strategy.

GCVelocityUpdateStrategy(GCVelocityUpdateStrategy copy)
Copy constructor.

Method Summary

GCVelocityUpdateStrategy	getClone() Clone the VelocityUpdateStrategy object.
int	getFailureCountThreshold() Get the count of failure threshold.
ControlParameter	getRho() Get the current value for rho.
ControlParameter	getRhoContractCoefficient() Get the coefficient value for rho contraction.
ControlParameter	getRhoExpandCoefficient() Get the coefficient value for rho expansion.
ControlParameter	getRhoLowerBound() Get the lower-bound value for rho.
int	getSuccessCountThreshold() Get the count of success threshold.
void	setFailureCountThreshold(int failureCountThreshold) Set the count of failure threshold.
void	setRho(ControlParameter rho) Set the value for rho.
void	setRhoContractCoefficient(ControlParameter rhoContractCoefficient) Set the contraction coefficient value.
void	setRhoExpandCoefficient(ControlParameter rhoExpandCoefficient) Set the value of the coefficient of expansion.
void	setRhoLowerBound(ControlParameter rhoLowerBound) Set the lower-bound value for rho.
void	setSuccessCountThreshold(int successCountThreshold) Set the threshold of success count value.
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

Constructor Detail

GCVelocityUpdateStrategy

public GCVelocityUpdateStrategy()

Create an instance of the GC Velocity Update strategy.

GCVelocityUpdateStrategy

public GCVelocityUpdateStrategy(GCVelocityUpdateStrategy copy)

Copy constructor. Copy the given instance.

Parameters:

copy - The instance to copy.

Method Detail

getClone

public GCVelocityUpdateStrategy 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.

getRhoLowerBound

public ControlParameter getRhoLowerBound()

Get the lower-bound value for rho.

Returns:

The lower-bound value for rho.

setRhoLowerBound

public void setRhoLowerBound(ControlParameter rhoLowerBound)

Set the lower-bound value for rho.

Parameters:

rhoLowerBound - The lower-bound to set.

getRho

public ControlParameter getRho()

Get the current value for rho.

Returns:

The current value for rho.

setRho

public void setRho(ControlParameter rho)

Set the value for rho.

Parameters:

rho - The value to set.

getSuccessCountThreshold

public int getSuccessCountThreshold()

Get the count of success threshold.

Returns:

The success threshold.

setSuccessCountThreshold

public void setSuccessCountThreshold(int successCountThreshold)

Set the threshold of success count value.

Parameters:

successCountThreshold - The value to set.

getFailureCountThreshold

public int getFailureCountThreshold()

Get the count of failure threshold.

Returns:

The failure threshold.

setFailureCountThreshold

public void setFailureCountThreshold(int failureCountThreshold)

Set the count of failure threshold.

Parameters:

failureCountThreshold - The value to set.

getRhoExpandCoefficient

public ControlParameter getRhoExpandCoefficient()

Get the coefficient value for rho expansion.

Returns:

The expansion coefficient value.

setRhoExpandCoefficient

public void setRhoExpandCoefficient(ControlParameter rhoExpandCoefficient)

Set the value of the coefficient of expansion.

Parameters:

rhoExpandCoefficient - The value to set.

getRhoContractCoefficient

public ControlParameter getRhoContractCoefficient()

Get the coefficient value for rho contraction.

Returns:

The contraction coefficient value.

setRhoContractCoefficient

public void setRhoContractCoefficient(ControlParameter rhoContractCoefficient)

Set the contraction coefficient value.

Parameters:

rhoContractCoefficient - The value to set.