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Diffstat (limited to 'build/Bonmin/include/coin/BonEcpCuts.hpp')
-rw-r--r-- | build/Bonmin/include/coin/BonEcpCuts.hpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/build/Bonmin/include/coin/BonEcpCuts.hpp b/build/Bonmin/include/coin/BonEcpCuts.hpp new file mode 100644 index 0000000..8f57038 --- /dev/null +++ b/build/Bonmin/include/coin/BonEcpCuts.hpp @@ -0,0 +1,97 @@ +// (C) Copyright International Business Machines (IBM) 2006, 2007 +// All Rights Reserved. +// This code is published under the Eclipse Public License. +// +// Authors : +// P. Bonami, International Business Machines +// +// Date : 12/20/2006 + +#ifndef BonECPCuts_HPP +#define BonECPCuts_HPP + +#include "BonOaDecBase.hpp" +#include "CglCutGenerator.hpp" +namespace Bonmin +{ + class EcpCuts: public OaDecompositionBase + { + public: + EcpCuts(BabSetupBase & b); + + /// Copy constructor + EcpCuts(const EcpCuts & copy): + OaDecompositionBase(copy), + objValue_(copy.objValue_), + numRounds_(copy.numRounds_), + abs_violation_tol_(copy.abs_violation_tol_), + rel_violation_tol_(copy.rel_violation_tol_), + beta_(copy.beta_) + {} + + /// clone + CglCutGenerator * clone() const + { + return new EcpCuts(*this); + } + + /// Destructor + virtual ~EcpCuts() + {} + /** Standard cut generation methods. */ + virtual void generateCuts(const OsiSolverInterface &si, OsiCuts & cs, + const CglTreeInfo info = CglTreeInfo()) const; + double doEcpRounds(OsiSolverInterface &si, + bool leaveSiUnchanged, + double* violation = NULL); + + void setNumRounds(int value) + { + numRounds_ = value; + } + + void setPropabilityFactor(double value) + { + beta_ = value; + } + + void setAbsViolationTolerance(double value) + { + abs_violation_tol_ = value; + } + void setRelViolationTolerance(double value) + { + rel_violation_tol_ = value; + } + + /** Register ecp cuts options.*/ + static void registerOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions); + + protected: + /// virtual method which performs the OA algorithm by modifying lp and nlp. + virtual double performOa(OsiCuts & cs, solverManip &lpManip, + BabInfo * babInfo, double &cutoff, const CglTreeInfo &info) const + { + throw -1; + } + /// virutal method to decide if local search is performed + virtual bool doLocalSearch(BabInfo * babInfo) const + { + return 0; + } + private: + /** Record obj value at final point of Ecp. */ + mutable double objValue_; + /** Record NLP infeasibility at final point of Ecp */ + mutable double violation_; + /** maximum number of iterations of generation. */ + int numRounds_; + /** absolute tolerance for NLP constraint violation to stop ECP rounds */ + double abs_violation_tol_; + /** relative tolerance for NLP constraint violation to stop ECP rounds */ + double rel_violation_tol_; + /** Factor for probability for skipping cuts */ + double beta_; + }; +} /* end namespace Bonmin.*/ +#endif |