eoStandardVelocity< POT > Class Template Reference

Standard velocity performer for particle swarm optimization. More...

#include <eoStandardVelocity.h>

Inheritance diagram for eoStandardVelocity< POT >:

List of all members.

Public Types
typedef POT::ParticleVelocityType	VelocityType
Public Member Functions
	eoStandardVelocity (eoTopology< POT > &_topology, const VelocityType &_w, const VelocityType &_c1, const VelocityType &_c2, eoRealVectorBounds &_bounds, eoRealBoundModifier &_bndsModifier, eoRng &_gen=rng)
	Full constructor: Bounds and bound modifier required.
	eoStandardVelocity (eoTopology< POT > &_topology, const VelocityType &_w, const VelocityType &_c1, const VelocityType &_c2, eoRealVectorBounds &_bounds, eoRng &_gen=rng)
	Constructor: No bound updater required <-> fixed bounds.
	eoStandardVelocity (eoTopology< POT > &_topology, const VelocityType &_w, const VelocityType &_c1, const VelocityType &_c2, eoRng &_gen=rng)
	Constructor: Neither bounds nor bound updater required <-> free velocity.
void	operator() (POT &_po, unsigned _indice)
	Evaluate the new velocities of the given particle.
void	updateNeighborhood (POT &_po, unsigned _indice)
	Update the neighborhood.
eoTopology< POT > &	getTopology ()
	eoTopology<POT> getTopology
Protected Attributes
eoTopology< POT > &	topology
const VelocityType &	omega
const VelocityType &	c1
const VelocityType &	c2
eoRealVectorBounds	bounds
eoRealBoundModifier &	bndsModifier
eoRng &	gen
eoDummyRealBoundModifier	dummyModifier

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Detailed Description

template<class POT>
class eoStandardVelocity< POT >

Standard velocity performer for particle swarm optimization.

Derivated from abstract eoVelocity, At step t: v(t+1)= w * v(t) + c1 * r1 * ( xbest(t)-x(t) ) + c2 * r2 * ( lbest(t) - x(t) ) lbest depends on the topology evolved, when using eoStarTopology, lbest corresponds to the global. Otherwise, lbest is a "local best", i.e the best in a neighborhood.

Examples:

t-eoEasyPSO.cpp, and t-eoSyncEasyPSO.cpp.

Definition at line 46 of file eoStandardVelocity.h.

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Constructor & Destructor Documentation

template<class POT>

eoStandardVelocity< POT >::eoStandardVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_w,
		const VelocityType &	_c1,
		const VelocityType &	_c2,
		eoRealVectorBounds &	_bounds,
		eoRealBoundModifier &	_bndsModifier,
		eoRng &	_gen = rng
	)		[inline]

Full constructor: Bounds and bound modifier required.

Parameters:

_topology	- The topology to get the global/local/other best
_w	- The weight factor.
_c1	- Learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- Learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
_bounds	- An eoRealBaseVectorBounds: real bounds for real velocities. If the velocities are not real, they won't be bounded by default. Should have a eoBounds ?
_bndsModifier	- An eoRealBoundModifier used to modify the bounds (for real bounds only).
_gen	- The eo random generator, default=rng

Definition at line 66 of file eoStandardVelocity.h.

template<class POT>

eoStandardVelocity< POT >::eoStandardVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_w,
		const VelocityType &	_c1,
		const VelocityType &	_c2,
		eoRealVectorBounds &	_bounds,
		eoRng &	_gen = rng
	)		[inline]

Constructor: No bound updater required <-> fixed bounds.

Parameters:

_topology	- The topology to get the global/local/other best
_w	- The weight factor.
_c1	- Learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- Learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
_bounds	- An eoRealBaseVectorBounds: real bounds for real velocities. If the velocities are not real, they won't be bounded by default. Should have a eoBounds ?
_gen	- The eo random generator, default=rng

Definition at line 91 of file eoStandardVelocity.h.

template<class POT>

eoStandardVelocity< POT >::eoStandardVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_w,
		const VelocityType &	_c1,
		const VelocityType &	_c2,
		eoRng &	_gen = rng
	)		[inline]

Constructor: Neither bounds nor bound updater required <-> free velocity.

Parameters:

_topology	- The topology to get the global/local/other best
_w	- The weight factor.
_c1	- Learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- Learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
_gen	- The eo random generator, default=rng

Definition at line 113 of file eoStandardVelocity.h.

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Member Function Documentation

template<class POT>

void eoStandardVelocity< POT >::operator()	(	POT &	_po,
		unsigned	_indice
	)		[inline, virtual]

Evaluate the new velocities of the given particle.

Need an indice to identify the particle into the topology.

Parameters:

_po	- A particle
_indice	- The indice (into the topology) of the given particle

Implements eoBF< POT &, unsigned, void >.

Definition at line 134 of file eoStandardVelocity.h.

References eoRealVectorBounds::adjust_size(), eoRealBaseVectorBounds::minimum(), and eoRng::uniform().

template<class POT>

eoTopology<POT>& eoStandardVelocity< POT >::getTopology

(

)

[inline, virtual]

eoTopology<POT> getTopology

Returns:

topology

Implements eoVelocity< POT >.

Definition at line 174 of file eoStandardVelocity.h.

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The documentation for this class was generated from the following file:

• eoStandardVelocity.h