eoConstrictedVariableWeightVelocity< POT > Class Template Reference

Inertia variable + constriction velocity for particle swarm optimization. More...

#include <eoConstrictedVariableWeightVelocity.h>

Inheritance diagram for eoConstrictedVariableWeightVelocity< POT >:

List of all members.

Public Types
typedef POT::ParticleVelocityType	VelocityType
Public Member Functions
	eoConstrictedVariableWeightVelocity (eoTopology< POT > &_topology, const VelocityType &_coeff, eoWeightUpdater< VelocityType > &_weightUpdater, const VelocityType &_c1, const VelocityType &_c2, eoRealVectorBounds &_bounds, eoRealBoundModifier &_bndsModifier, eoRng &_gen=rng)
	Full constructor: Bounds and bound modifier required.
	eoConstrictedVariableWeightVelocity (eoTopology< POT > &_topology, const VelocityType &_coeff, eoWeightUpdater< VelocityType > &_weightUpdater, const VelocityType &_c1, const VelocityType &_c2, eoRealVectorBounds &_bounds, eoRng &_gen=rng)
	Constructor: No bound updater required <-> fixed bounds.
	eoConstrictedVariableWeightVelocity (eoTopology< POT > &_topology, const VelocityType &_coeff, eoWeightUpdater< VelocityType > &_weightUpdater, 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.
Protected Attributes
eoTopology< POT > &	topology
const VelocityType &	coeff
eoWeightUpdater< VelocityType > &	weightUpdater
const VelocityType &	c1
const VelocityType &	c2
eoRealVectorBounds &	bounds
eoRealBoundModifier &	bndsModifier
VelocityType	weight
eoRng &	gen
eoDummyRealBoundModifier	dummyModifier

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Detailed Description

template<class POT>
class eoConstrictedVariableWeightVelocity< POT >

Inertia variable + constriction velocity for particle swarm optimization.

Derivated from abstract eoVelocity, At step t: v(t+1)= K * ( w*v(t) + c1*r1* (xbest(t)-x(t)) + c2*r2* (gbest(t) - x(t))) w is updated each time the velocity performer is called and K is fixed (ci given and Ri chosen at random in [0;1]).

Definition at line 45 of file eoConstrictedVariableWeightVelocity.h.

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Constructor & Destructor Documentation

template<class POT >

eoConstrictedVariableWeightVelocity< POT >::eoConstrictedVariableWeightVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		eoWeightUpdater< VelocityType > &	_weightUpdater,
		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
_coeff	- The constriction coefficient
_weightUpdater	- An eoWeightUpdater used to update the inertia weight
_c1	- The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- The second 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 eoConstrictedVariableWeightVelocity.h.

template<class POT >

eoConstrictedVariableWeightVelocity< POT >::eoConstrictedVariableWeightVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		eoWeightUpdater< VelocityType > &	_weightUpdater,
		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
_coeff	- The constriction coefficient
_weightUpdater	- An eoWeightUpdater used to update the inertia weight
_c1	- The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- The second 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 94 of file eoConstrictedVariableWeightVelocity.h.

template<class POT >

eoConstrictedVariableWeightVelocity< POT >::eoConstrictedVariableWeightVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		eoWeightUpdater< VelocityType > &	_weightUpdater,
		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*
_coeff	- The constriction coefficient
_weightUpdater	- An eoWeightUpdater used to update the inertia weight
_c1	- The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
_c2	- The second learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
_gen	- The eo random generator, default=rng

Definition at line 119 of file eoConstrictedVariableWeightVelocity.h.

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Member Function Documentation

template<class POT >

void eoConstrictedVariableWeightVelocity< 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. Steps are :

• evaluate r1 and r2, the customed learning factors
• adjust the size of the bounds (even if dummy)
• update the weight with the weightUpdater (use the dummy updater if there's no updater provided)
• modify the bounds with the bounds modifier (use the dummy modifier if there's no modifier provided)

  Parameters:

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

Implements eoBF< POT &, unsigned, void >.

Definition at line 145 of file eoConstrictedVariableWeightVelocity.h.

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

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

• eoConstrictedVariableWeightVelocity.h