feat(moeo): add real-valued multi-objective local search components
moeoBestUnvisitedSelect: selects unvisited individuals with optional Pareto-dominance exclusion filtering. RealVectorNeighborhoodExplorer: generates random perturbation directions with geometric scaling along improving directions. Supports per-dimension epsilon and minimum scaling factors. moeoUnifiedDominanceBasedLSReal: archive-based dominance local search for real-valued multi-objective problems.
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Eremey Valetov
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moeo/src/algo/moeoUnifiedDominanceBasedLS_Real.h
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moeo/src/algo/moeoUnifiedDominanceBasedLS_Real.h
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/*
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* <moeoUnifiedDominanceBasedLS_Real.h>
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* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2008
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* (C) OPAC Team, LIFL, 2002-2008
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*
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* Eremey Valetov
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*
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* This software is governed by the CeCILL license under French law and
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* abiding by the rules of distribution of free software. You can use,
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* modify and/ or redistribute the software under the terms of the CeCILL
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* license as circulated by CEA, CNRS and INRIA at the following URL
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* "http://www.cecill.info".
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*
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* As a counterpart to the access to the source code and rights to copy,
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* modify and redistribute granted by the license, users are provided only
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* with a limited warranty and the software's author, the holder of the
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* economic rights, and the successive licensors have only limited liability.
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*
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* In this respect, the user's attention is drawn to the risks associated
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* with loading, using, modifying and/or developing or reproducing the
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* software by the user in light of its specific status of free software,
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* that may mean that it is complicated to manipulate, and that also
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* therefore means that it is reserved for developers and experienced
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* professionals having in-depth computer knowledge. Users are therefore
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* encouraged to load and test the software's suitability as regards their
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* requirements in conditions enabling the security of their systems and/or
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* data to be ensured and, more generally, to use and operate it in the
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* same conditions as regards security.
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* The fact that you are presently reading this means that you have had
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* knowledge of the CeCILL license and that you accept its terms.
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*
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* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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* Contact: paradiseo-help@lists.gforge.inria.fr
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*
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*/
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//-----------------------------------------------------------------------------
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#ifndef _MOEOUNIFIEDDOMINANCEBASEDLSREAL_H
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#define _MOEOUNIFIEDDOMINANCEBASEDLSREAL_H
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#include <eoPop.h>
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#include <eoContinue.h>
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#include <eoEvalFunc.h>
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#include <utils/eoLogger.h>
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#include <archive/moeoArchive.h>
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#include <algo/moeoPopLS.h>
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#include <explorer/moeoPopNeighborhoodExplorer.h>
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#include <selection/moeoUnvisitedSelect.h>
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#ifdef _OPENMP
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#include <omp.h>
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#endif
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/**
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* Real-valued dominance-based local search for multi-objective optimization.
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* Uses an archive, flexible selection strategy, and neighborhood exploration
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* with optional OpenMP parallelism for initial population evaluation.
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*/
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template < class Neighbor >
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class moeoUnifiedDominanceBasedLSReal : public moeoPopLS < Neighbor >
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{
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public:
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typedef typename Neighbor::EOT MOEOT;
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moeoUnifiedDominanceBasedLSReal(
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eoContinue < MOEOT > & _continuator,
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eoEvalFunc < MOEOT > & _eval,
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moeoArchive < MOEOT > & _archive,
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moeoPopNeighborhoodExplorer < Neighbor > & _explorer,
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moeoUnvisitedSelect < MOEOT > & _select)
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: continuator(_continuator), eval(_eval),
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archive(_archive), explorer(_explorer), select(_select) {}
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virtual void operator()(eoPop<MOEOT>& _pop) override
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{
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size_t initialPopSize = _pop.size();
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int generation = 0;
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std::vector<unsigned int> selectionVector;
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std::vector<int> initialFlags;
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eoPop<MOEOT> tmp_pop;
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#ifdef _OPENMP
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#pragma omp parallel for
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#endif
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for (size_t i = 0; i < _pop.size(); i++)
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eval(_pop[i]);
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archive(_pop);
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do {
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tmp_pop.resize(0);
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selectionVector = select(archive);
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initialFlags.clear();
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initialFlags.reserve(selectionVector.size());
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for (auto idx : selectionVector)
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initialFlags.push_back(archive[idx].flag());
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eo::log << eo::progress << "LS generation " << ++generation
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<< ", archive size = " << archive.size() << std::endl;
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eo::log << eo::debug << "continuator = " << continuator << std::endl;
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explorer(archive, selectionVector, tmp_pop);
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// Verify explorer incremented visit counts correctly
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bool allIncremented = true;
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bool noneIncremented = true;
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for (size_t i = 0; i < selectionVector.size(); i++) {
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int newFlag = archive[selectionVector[i]].flag();
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if (newFlag == initialFlags[i] + 1)
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noneIncremented = false;
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else
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allIncremented = false;
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}
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if (!allIncremented && noneIncremented) {
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eo::log << eo::warnings << "Explorer did not increment exploration counts" << std::endl;
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for (auto idx : selectionVector)
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archive[idx].flag(archive[idx].flag() + 1);
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} else if (!allIncremented) {
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eo::log << eo::warnings << "Exploration counts incremented inconsistently" << std::endl;
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for (size_t i = 0; i < selectionVector.size(); i++)
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archive[selectionVector[i]].flag(initialFlags[i] + 1);
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}
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archive(tmp_pop);
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archive(_pop);
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if (archive.size() <= initialPopSize) {
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_pop = archive;
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} else {
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tmp_pop.resize(0);
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for (size_t i = 0; i < initialPopSize; i++)
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tmp_pop.push_back(archive[i]);
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_pop = tmp_pop;
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}
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} while (continuator(archive));
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}
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protected:
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eoContinue < MOEOT > & continuator;
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eoEvalFunc<MOEOT>& eval;
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moeoArchive < MOEOT > & archive;
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moeoPopNeighborhoodExplorer < Neighbor > & explorer;
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moeoUnvisitedSelect < MOEOT > & select;
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};
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#endif /* _MOEOUNIFIEDDOMINANCEBASEDLSREAL_H */
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