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# /home/coin/svn-release/Alps-1.4.5/Alps/examples/Abc/AbcBranchActual.h

Go to the documentation of this file.

    00001 /*===========================================================================*
    00002  * This file is part of the Abstract Library for Parallel Search (ALPS).     *
    00003  *                                                                           *
    00004  * ALPS is distributed under the Eclipse Public License as part of the       *
    00005  * COIN-OR repository (http://www.coin-or.org).                              *
    00006  *                                                                           *
    00007  * Authors:                                                                  *
    00008  *                                                                           *
    00009  *          Yan Xu, Lehigh University                                        *
    00010  *          Ted Ralphs, Lehigh University                                    *
    00011  *                                                                           *
    00012  * Conceptual Design:                                                        *
    00013  *                                                                           *
    00014  *          Yan Xu, Lehigh University                                        *
    00015  *          Ted Ralphs, Lehigh University                                    *
    00016  *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
    00017  *          Matthew Saltzman, Clemson University                             *
    00018  *                                                                           *
    00019  *                                                                           *
    00020  * Copyright (C) 2001-2013, Lehigh University, Yan Xu, and Ted Ralphs.       *
    00021  *===========================================================================*/
    00022
    00023 #ifndef AbcBranchActual_h_
    00024 #define AbcBranchActual_h_
    00025
    00026 //#############################################################################
    00027 // This file is modified from SbbBranchActual.hpp
    00028 //#############################################################################
    00029
    00030 #include "AbcBranchBase.h"
    00031
    00032 //#############################################################################
    00038 class AbcBranchDefaultDecision : public AbcBranchDecision {
    00039
    00040  public:
    00041     // Default Constructor
    00042     AbcBranchDefaultDecision();
    00043
    00044     // Copy constructor
    00045     AbcBranchDefaultDecision(const AbcBranchDefaultDecision &);
    00046
    00047     virtual ~AbcBranchDefaultDecision();
    00048
    00050     virtual AbcBranchDecision * clone() const;
    00051
    00053     virtual void initialize(AbcModel * model);
    00054
    00077     virtual int betterBranch(int thisOne,
    00078                              int bestSoFar,
    00079                              double changeUp, int numInfUp,
    00080                              double changeDn, int numInfDn);
    00081
    00082  private:
    00083
    00085     AbcBranchDefaultDecision & operator=(const AbcBranchDefaultDecision& rhs);
    00086
    00089     AbcModel * model_;
    00090
    00092     double bestCriterion_;
    00093
    00095     double bestChangeUp_;
    00096
    00098     int bestNumberUp_;
    00099
    00101     double bestChangeDown_;
    00102
    00104     int bestNumberDown_;
    00105
    00107     int bestObject_;
    00108 };
    00109
    00110
    00111 class AbcPseudocost
    00112 {
    00113  public:
    00114     int colInd_;
    00115     double upCost_;
    00116     int upNum_;
    00117     double downCost_;
    00118     int downNum_;
    00119
    00120  public:
    00121     AbcPseudocost()
    00122         :
    00123         colInd_(-1),
    00124         upCost_(0.0), upNum_(0),
    00125         downCost_(0.0), downNum_(0) {}
    00126
    00127     AbcPseudocost(const int ind,
    00128                   const double uc,
    00129                   const int un,
    00130                   const double dc,
    00131                   const int dn)
    00132         :
    00133         colInd_(ind),
    00134         upCost_(uc), upNum_(un),
    00135         downCost_(dc), downNum_(dn) {}
    00136
    00137     void update(const int dir,
    00138                 const double parentObjValue,
    00139                 const double objValue,
    00140                 const double solValue);
    00141
    00142 };
    00143
    00144 #endif