eoConstrictedVelocity< POT > Class Template Reference

Constricted velocity performer. More...

#include <eoConstrictedVelocity.h>

Inheritance diagram for eoConstrictedVelocity< POT >:

List of all members.

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

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Detailed Description

template<class POT>
class eoConstrictedVelocity< POT >

Constricted velocity performer.

Derivated from abstract eoVelocity, At step t+1 : v(t+1)= C * [ v(t) + c1*r1 * (xbest(t)-x(t)) + c2*r2 * (gbest(t) - x(t)) ] C is fixed for all the particles and all the generations. Default C = 2 * k / abs(2 - P - sqrt (P*(P-4))) (ci and C given;P=c1*r1 + c2*r2 ; Ri chosen at random * in [0;1])

Definition at line 29 of file eoConstrictedVelocity.h.

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Constructor & Destructor Documentation

template<class POT>

eoConstrictedVelocity< POT >::eoConstrictedVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		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
	_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 ?
	_boundsModifier	- An eoRealBoundModifier used to modify the bounds (for real bounds only).
	_gen	- The eo random generator, default=rng

Definition at line 49 of file eoConstrictedVelocity.h.

template<class POT>

eoConstrictedVelocity< POT >::eoConstrictedVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		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
	_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 74 of file eoConstrictedVelocity.h.

template<class POT>

eoConstrictedVelocity< POT >::eoConstrictedVelocity	(	eoTopology< POT > &	_topology,
		const VelocityType &	_coeff,
		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
	_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 96 of file eoConstrictedVelocity.h.

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Member Function Documentation

template<class POT>

void eoConstrictedVelocity< 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)
• 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 119 of file eoConstrictedVelocity.h.

References eoRealVectorBounds::adjust_size(), eoConstrictedVelocity< POT >::bndsModifier, eoConstrictedVelocity< POT >::bounds, eoConstrictedVelocity< POT >::c1, eoConstrictedVelocity< POT >::c2, eoConstrictedVelocity< POT >::coeff, eoRealBaseVectorBounds::isMaxBounded(), eoRealBaseVectorBounds::isMinBounded(), eoRealBaseVectorBounds::maximum(), eoRealBaseVectorBounds::minimum(), eoConstrictedVelocity< POT >::topology, and eoRng::uniform().

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

• eoConstrictedVelocity.h

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