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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@232 331e1502-861f-0410-8da2-ba01fb791d7f
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/**
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* The NSGA-II algorithm as described in:
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* Deb, K., S. Agrawal, A. Pratap, and T. Meyarivan : "A fast elitist non-dominated sorting genetic algorithm for multi-objective optimization: NSGA-II".
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* Deb, K., S. Agrawal, A. Pratap, and T. Meyarivan : "A fast elitist non-dominated sorting genetic algorithm for multi-objective optimization: NSGA-II".
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* In IEEE Transactions on Evolutionary Computation, Vol. 6, No 2, pp 182-197 (April 2002).
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* This class builds the NSGA-II algorithm only by using the components of the ParadisEO-MOEO framework.
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*/
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template < class MOEOT >
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template < class MOEOT >
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class moeoNSGAII: public moeoEA < MOEOT >
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{
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public:
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/**
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* This constructor builds the algorithm as descibed in the paper.
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* @param _max_gen number of generations before stopping
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* @param _eval evaluation function
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* @param _op variation operator
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*/
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moeoNSGAII (unsigned _max_gen, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > &_op) :
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continuator (*(new eoGenContinue < MOEOT > (_max_gen))), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, _op), breed (genBreed)
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/**
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* This constructor builds the algorithm as descibed in the paper.
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* @param _max_gen number of generations before stopping
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* @param _eval evaluation function
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* @param _op variation operator
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*/
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moeoNSGAII (unsigned _max_gen, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > &_op) :
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continuator (*(new eoGenContinue < MOEOT > (_max_gen))), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, _op), breed (genBreed)
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{}
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/**
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* Ctor taking _max_gen, crossover and mutation.
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* @param _max_gen number of generations before stopping
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* @param _eval evaluation function
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* @param _crossover crossover
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* @param _pCross crossover probability
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* @param _mutation mutation
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* @param _pMut mutation probability
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* @param _eval evaluation function
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* @param _crossover crossover
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* @param _pCross crossover probability
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* @param _mutation mutation
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* @param _pMut mutation probability
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*/
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moeoNSGAII (unsigned _max_gen, eoEvalFunc < MOEOT > &_eval, eoQuadOp < MOEOT > & _crossover, double _pCross, eoMonOp < MOEOT > & _mutation, double _pMut) :
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continuator (*(new eoGenContinue < MOEOT > (_max_gen))), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, *new eoSGAGenOp < MOEOT > (_crossover, _pCross, _mutation, _pMut)), breed (genBreed)
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moeoNSGAII (unsigned _max_gen, eoEvalFunc < MOEOT > &_eval, eoQuadOp < MOEOT > & _crossover, double _pCross, eoMonOp < MOEOT > & _mutation, double _pMut) :
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continuator (*(new eoGenContinue < MOEOT > (_max_gen))), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, *new eoSGAGenOp < MOEOT > (_crossover, _pCross, _mutation, _pMut)), breed (genBreed)
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{}
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/**
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* Ctor taking a continuator instead of _gen_max.
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* @param _continuator stopping criteria
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* @param _eval evaluation function
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* @param _op variation operator
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*/
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moeoNSGAII (eoContinue < MOEOT > & _continuator, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > & _op) :
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continuator (_continuator), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, _op), breed (genBreed)
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moeoNSGAII (eoContinue < MOEOT > & _continuator, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > & _op) :
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continuator (_continuator), eval (_eval), loopEval (_eval), popEval (loopEval), select (2), // binary tournament selection
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replace (fitnessAssignment, diversityAssignment), genBreed (select, _op), breed (genBreed)
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{}
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/**
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* Apply a few generation of evolution to the population _pop.
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* @param _pop the population
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*/
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virtual void operator () (eoPop < MOEOT > &_pop)
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{
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eoPop < MOEOT > offspring, empty_pop;
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popEval (empty_pop, _pop); // a first eval of _pop
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// evaluate fitness and diversity
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fitnessAssignment(_pop);
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diversityAssignment(_pop);
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do
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{
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// generate offspring, worths are recalculated if necessary
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breed (_pop, offspring);
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// eval of offspring
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popEval (_pop, offspring);
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// after replace, the new pop is in _pop. Worths are recalculated if necessary
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replace (_pop, offspring);
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} while (continuator (_pop));
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eoPop < MOEOT > offspring, empty_pop;
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popEval (empty_pop, _pop); // a first eval of _pop
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// evaluate fitness and diversity
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fitnessAssignment(_pop);
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diversityAssignment(_pop);
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do
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{
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// generate offspring, worths are recalculated if necessary
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breed (_pop, offspring);
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// eval of offspring
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popEval (_pop, offspring);
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// after replace, the new pop is in _pop. Worths are recalculated if necessary
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replace (_pop, offspring);
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} while (continuator (_pop));
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}
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protected:
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/** stopping criteria */
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eoContinue < MOEOT > & continuator;
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/** evaluation function */
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eoEvalFunc < MOEOT > & eval;
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/** to evaluate the whole population */
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eoPopLoopEval < MOEOT > loopEval;
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/** to evaluate the whole population */
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eoPopEvalFunc < MOEOT > & popEval;
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/** general breeder */
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eoGeneralBreeder < MOEOT > genBreed;
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/** breeder */
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eoBreed < MOEOT > & breed;
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/** binary tournament selection */
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moeoDetTournamentSelect < MOEOT > select;
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/** elitist replacement */
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moeoElitistReplacement < MOEOT > replace;
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/** fitness assignment used in NSGA-II */
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moeoFastNonDominatedSortingFitnessAssignment < MOEOT > fitnessAssignment;
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/** Diversity assignment used in NSGA-II */
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moeoCrowdingDistanceDiversityAssignment < MOEOT > diversityAssignment;
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/** stopping criteria */
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eoContinue < MOEOT > & continuator;
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/** evaluation function */
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eoEvalFunc < MOEOT > & eval;
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/** to evaluate the whole population */
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eoPopLoopEval < MOEOT > loopEval;
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/** to evaluate the whole population */
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eoPopEvalFunc < MOEOT > & popEval;
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/** general breeder */
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eoGeneralBreeder < MOEOT > genBreed;
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/** breeder */
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eoBreed < MOEOT > & breed;
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/** binary tournament selection */
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moeoDetTournamentSelect < MOEOT > select;
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/** elitist replacement */
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moeoElitistReplacement < MOEOT > replace;
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/** fitness assignment used in NSGA-II */
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moeoFastNonDominatedSortingFitnessAssignment < MOEOT > fitnessAssignment;
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/** Diversity assignment used in NSGA-II */
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moeoCrowdingDistanceDiversityAssignment < MOEOT > diversityAssignment;
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};
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