aa5dbe82c6
- relative includes in headers - absolute includes in exe code - include sstream lib in eoExceptions.h - fix ga/make_op_ga.cpp - fix eoSGATransform.h
191 lines
7.9 KiB
C++
191 lines
7.9 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// eoFixedInertiaWeightedVelocity.h
|
|
// (c) OPAC 2007
|
|
/*
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
Contact: thomas.legrand@lifl.fr
|
|
*/
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifndef EOFIXEDINERTIAWEIGHTEDVELOCITY_H
|
|
#define EOFIXEDINERTIAWEIGHTEDVELOCITY_H
|
|
|
|
//-----------------------------------------------------------------------------
|
|
#include "eoFunctor.h"
|
|
#include "utils/eoRNG.h"
|
|
#include "eoPop.h"
|
|
#include "utils/eoRealVectorBounds.h"
|
|
#include "eoTopology.h"
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
/** Inertia weight based velocity performer. Derivated from abstract eoVelocity,
|
|
* At step t+1 : v(t+1)= w * v(t) + c1*r1 * (xbest(t)-x(t)) + c2*r2 * (gbest(t) - x(t))
|
|
* w is fixed for all the particles and all the generations.
|
|
* (ci and w given; Ri chosen at random * in [0;1])
|
|
*
|
|
* @ingroup Variators
|
|
*/
|
|
template < class POT > class eoFixedInertiaWeightedVelocity:public eoVelocity < POT >
|
|
{
|
|
|
|
public:
|
|
|
|
/*
|
|
* Each element for the velocity evaluation is expected to be of type VelocityType.
|
|
*/
|
|
typedef typename POT::ParticleVelocityType VelocityType;
|
|
|
|
/** Full constructor: Bounds and bound modifier required
|
|
* @param _topology - The topology to get the global/local/other best
|
|
* @param _weight - The weight with type VelocityType
|
|
* @param _c1 - The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
|
|
* @param _c2 - The second learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
|
|
* @param _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 ?
|
|
* @param _bndsModifier - An eoRealBoundModifier used to modify the bounds (for real bounds only).
|
|
* @param _gen - The eo random generator, default=rng
|
|
*/
|
|
eoFixedInertiaWeightedVelocity (eoTopology < POT > & _topology,
|
|
const VelocityType & _weight,
|
|
const VelocityType & _c1,
|
|
const VelocityType & _c2 ,
|
|
eoRealVectorBounds & _bounds,
|
|
eoRealBoundModifier & _bndsModifier,
|
|
eoRng & _gen = rng):
|
|
topology(_topology),
|
|
weight(_weight),
|
|
c1 (_c1),
|
|
c2 (_c2),
|
|
bounds(_bounds),
|
|
bndsModifier(_bndsModifier),
|
|
gen(_gen){}
|
|
|
|
|
|
/** Constructor: No bound updater required <-> fixed bounds
|
|
* @param _topology - The topology to get the global/local/other best
|
|
* @param _weight - The weight with type VelocityType
|
|
* @param _c1 - The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
|
|
* @param _c2 - The second learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
|
|
* @param _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 ?
|
|
* @param _gen - The eo random generator, default=rng
|
|
*/
|
|
eoFixedInertiaWeightedVelocity (eoTopology < POT > & _topology,
|
|
const VelocityType & _weight,
|
|
const VelocityType & _c1,
|
|
const VelocityType & _c2,
|
|
eoRealVectorBounds & _bounds,
|
|
eoRng & _gen = rng):
|
|
topology(_topology),
|
|
weight(_weight),
|
|
c1 (_c1),
|
|
c2 (_c2),
|
|
bounds(_bounds),
|
|
bndsModifier(dummyModifier),
|
|
gen(_gen){}
|
|
|
|
|
|
/** Constructor: Neither bounds nor bound updater required <-> free velocity
|
|
* @param _topology - The topology to get the global/local/other best
|
|
* @param _weight - The weight with type VelocityType
|
|
* @param _c1 - The first learning factor used for the particle's best. Type must be POT::ParticleVelocityType
|
|
* @param _c2 - The second learning factor used for the local/global best(s). Type must be POT::ParticleVelocityType
|
|
* @param _gen - The eo random generator, default=rng
|
|
*/
|
|
eoFixedInertiaWeightedVelocity (eoTopology < POT > & _topology,
|
|
const VelocityType & _weight,
|
|
const VelocityType & _c1,
|
|
const VelocityType & _c2,
|
|
eoRng & _gen = rng):
|
|
topology(_topology),
|
|
weight(_weight),
|
|
c1 (_c1),
|
|
c2 (_c2),
|
|
bounds(*(new eoRealVectorNoBounds(0))),
|
|
bndsModifier(dummyModifier),
|
|
gen(_gen)
|
|
{}
|
|
|
|
/**
|
|
* 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)
|
|
* @param _po - A particle
|
|
* @param _indice - The indice (into the topology) of the given particle
|
|
*/
|
|
void operator () (POT & _po,unsigned _indice)
|
|
{
|
|
VelocityType r1;
|
|
VelocityType r2;
|
|
|
|
VelocityType newVelocity;
|
|
|
|
// cast the learning factors to VelocityType
|
|
r1 = (VelocityType) rng.uniform (1) * c1;
|
|
r2 = (VelocityType) rng.uniform (1) * c2;
|
|
|
|
// need to resize the bounds even if there are dummy because of "isBounded" call
|
|
bounds.adjust_size(_po.size());
|
|
|
|
// assign the new velocities
|
|
for (unsigned j = 0; j < _po.size (); j++)
|
|
{
|
|
newVelocity= weight * _po.velocities[j] + r1 * (_po.bestPositions[j] - _po[j]) + r2 * (topology.best (_indice)[j] - _po[j]);
|
|
|
|
/* modify the bounds */
|
|
bndsModifier(bounds,j);
|
|
|
|
/* check bounds */
|
|
if (bounds.isMinBounded(j))
|
|
newVelocity=(VelocityType)std::max(newVelocity,bounds.minimum(j));
|
|
if (bounds.isMaxBounded(j))
|
|
newVelocity=(VelocityType)std::min(newVelocity,bounds.maximum(j));
|
|
|
|
_po.velocities[j]=newVelocity;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Update the neighborhood.
|
|
*/
|
|
void updateNeighborhood(POT & _po,unsigned _indice)
|
|
{
|
|
topology.updateNeighborhood(_po,_indice);
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
eoTopology < POT > & topology;
|
|
const VelocityType & c1; // learning factor 1
|
|
const VelocityType & c2; // learning factor 2
|
|
const VelocityType & weight; // the fixed weight
|
|
eoRng & gen; // the random generator
|
|
|
|
eoRealVectorBounds & bounds; // REAL bounds even if the velocity could be of another type.
|
|
eoRealBoundModifier & bndsModifier;
|
|
|
|
// If the bound modifier doesn't need to be used, use the dummy instance
|
|
eoDummyRealBoundModifier dummyModifier;
|
|
};
|
|
|
|
|
|
#endif /*EOFIXEDINERTIAWEIGHTEDVELOCITY_H */
|