1994652019
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@836 331e1502-861f-0410-8da2-ba01fb791d7f
229 lines
6.8 KiB
C++
229 lines
6.8 KiB
C++
/*
|
|
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
|
|
* (C) OPAC Team, LIFL, 2002-2007
|
|
*
|
|
* (c) Antonio LaTorre <atorre@fi.upm.es>, 2007
|
|
*
|
|
* This software is governed by the CeCILL license under French law and
|
|
* abiding by the rules of distribution of free software. You can use,
|
|
* modify and/ or redistribute the software under the terms of the CeCILL
|
|
* license as circulated by CEA, CNRS and INRIA at the following URL
|
|
* "http://www.cecill.info".
|
|
*
|
|
* As a counterpart to the access to the source code and rights to copy,
|
|
* modify and redistribute granted by the license, users are provided only
|
|
* with a limited warranty and the software's author, the holder of the
|
|
* economic rights, and the successive licensors have only limited liability.
|
|
*
|
|
* In this respect, the user's attention is drawn to the risks associated
|
|
* with loading, using, modifying and/or developing or reproducing the
|
|
* software by the user in light of its specific status of free software,
|
|
* that may mean that it is complicated to manipulate, and that also
|
|
* therefore means that it is reserved for developers and experienced
|
|
* professionals having in-depth computer knowledge. Users are therefore
|
|
* encouraged to load and test the software's suitability as regards their
|
|
* requirements in conditions enabling the security of their systems and/or
|
|
* data to be ensured and, more generally, to use and operate it in the
|
|
* same conditions as regards security.
|
|
* The fact that you are presently reading this means that you have had
|
|
* knowledge of the CeCILL license and that you accept its terms.
|
|
*
|
|
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
|
|
* Contact: paradiseo-help@lists.gforge.inria.fr
|
|
*
|
|
*/
|
|
|
|
#ifndef eoVRPMutation_H
|
|
#define eoVRPMutation_H
|
|
|
|
// General includes
|
|
#include <algorithm>
|
|
|
|
// The base definition of eoMonOp
|
|
#include <eoOp.h>
|
|
|
|
/**
|
|
* \class eoVRPMutation eoVRPMutation.h
|
|
* \brief Implementation of variations of the four mutation operators for the VRP-TW defined by Tavares et al.
|
|
* These four operators should be separated in different classes and their probabilities
|
|
* made parameterizable.
|
|
*/
|
|
|
|
class eoVRPMutation: public eoMonOp <eoVRP> {
|
|
|
|
public:
|
|
|
|
/**
|
|
* \brief Default constructor: nothing to do here.
|
|
*/
|
|
|
|
eoVRPMutation () {
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief Returns a string containing the name of the class. Used to display statistics.
|
|
* \return The string containing the name of the class.
|
|
*/
|
|
|
|
std::string className () const {
|
|
|
|
return "eoVRPMutation";
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief Functor operator.
|
|
* Applies one of the four mutation operators available, each of them with a predefined
|
|
* (hard-coded) probability. These operators should be separated in different classes
|
|
* and their probabilities made parameterizable to do it in a more "paradisEO" way.
|
|
* \param _genotype The genotype being mutated (it will be probably modified).
|
|
* \return True if the individual has been modified. False otherwise.
|
|
*/
|
|
|
|
bool operator () (eoVRP& _genotype) {
|
|
|
|
bool res = false;
|
|
double op = rng.uniform ();
|
|
|
|
|
|
if (op <= 0.05)
|
|
res = swapMutation (_genotype);
|
|
else if ((op > 0.05) && (op <= 0.20))
|
|
res = inversionMutation (_genotype);
|
|
else if ((op > 0.20) && (op <= 0.25))
|
|
res = insertionMutation (_genotype);
|
|
else if ((op > 0.25) && (op <= 0.45))
|
|
res = DisplacementMutation (_genotype);
|
|
|
|
if (res)
|
|
_genotype.cleanRoutes ();
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
private:
|
|
|
|
|
|
/**
|
|
* \brief It exhanges the positions of two clients within the individual.
|
|
* Clients may or may not be in the same route.
|
|
* \param _genotype The genotype being mutated (it will be probably modified).
|
|
* \return True if the individual has been modified. False otherwise.
|
|
*/
|
|
|
|
bool swapMutation (eoVRP& _genotype) {
|
|
|
|
int p1 = rng.random (_genotype.size ());
|
|
int p2 = -1;
|
|
|
|
do {
|
|
p2 = rng.random (_genotype.size ());
|
|
} while (_genotype [p2] == _genotype [p1]);
|
|
|
|
std::swap (_genotype [p1], _genotype [p2]);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief It selects two positions in the genotype and inverts the clients between them.
|
|
* Clients may or may not be in the same route.
|
|
* \param _genotype The genotype being mutated (it will be probably modified).
|
|
* \return True if the individual has been modified. False otherwise.
|
|
*/
|
|
|
|
bool inversionMutation (eoVRP& _genotype) {
|
|
|
|
int p1 = rng.random (_genotype.size ());
|
|
int p2 = -1;
|
|
|
|
do {
|
|
p2 = rng.random (_genotype.size ());
|
|
} while (_genotype [p2] == _genotype [p1]);
|
|
|
|
if (p1 > p2)
|
|
std::swap (p1, p2);
|
|
|
|
// Reverse the subroute
|
|
reverse (_genotype.begin () + p1, _genotype.begin () + p2 + 1);
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief It selects and individual, erases it from its original position and inserts it somewhere else.
|
|
* The insertion may or may not be within the same route.
|
|
* \param _genotype The genotype being mutated (it will be probably modified).
|
|
* \return True if the individual has been modified. False otherwise.
|
|
*/
|
|
|
|
bool insertionMutation (eoVRP& _genotype) {
|
|
|
|
int p = -1;
|
|
|
|
// Selection of the client to be moved
|
|
do {
|
|
p = rng.random (_genotype.size ());
|
|
} while (_genotype [p] == -1);
|
|
|
|
// Temporary copy of the client
|
|
unsigned client = _genotype [p];
|
|
|
|
_genotype.erase (_genotype.begin () + p);
|
|
|
|
p = rng.random (_genotype.size () - 1);
|
|
_genotype.insert (_genotype.begin () + p, client);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief It selects a set of clients, erases them from their original position and inserts them somewhere else.
|
|
* The selected set of clients may cover different routes.
|
|
* \param _genotype The genotype being mutated (it will be probably modified).
|
|
* \return True if the individual has been modified. False otherwise.
|
|
*/
|
|
|
|
bool DisplacementMutation (eoVRP& _genotype) {
|
|
|
|
int p1 = rng.random (_genotype.size ());
|
|
int p2 = -1;
|
|
|
|
do {
|
|
p2 = rng.random (_genotype.size ());
|
|
} while (_genotype [p2] == _genotype [p1]);
|
|
|
|
if (p1 > p2)
|
|
std::swap (p1, p2);
|
|
|
|
// Temporary copy of the fragment being moved
|
|
Route route;
|
|
|
|
for (unsigned i = p1; i <= p2; i++)
|
|
route.push_back (_genotype [i]);
|
|
|
|
_genotype.erase (_genotype.begin () + p1, _genotype.begin () + p2 + 1);
|
|
|
|
unsigned p = rng.random ((_genotype.size () > 0) ? _genotype.size () - 1 : 0);
|
|
_genotype.insert (_genotype.begin () + p, route.begin (), route.end ());
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
};
|
|
|
|
#endif
|