[3044] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using HeuristicLab.Analysis;
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| 23 | using HeuristicLab.Core;
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| 24 | using HeuristicLab.Data;
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| 25 | using HeuristicLab.Operators;
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[3226] | 26 | using HeuristicLab.Optimization.Operators;
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[3044] | 27 | using HeuristicLab.Parameters;
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| 28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 29 | using HeuristicLab.Selection;
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| 30 |
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[3100] | 31 | namespace HeuristicLab.Algorithms.TabuSearch {
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[3044] | 32 | /// <summary>
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| 33 | /// An operator which represents a tabu search.
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| 34 | /// </summary>
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[3100] | 35 | [Item("TabuSearchMainLoop", "An operator which represents the main loop of a tabu search.")]
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[3044] | 36 | [StorableClass]
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[3141] | 37 | public sealed class TabuSearchMainLoop : AlgorithmOperator {
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[3044] | 38 | #region Parameter properties
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| 39 | public ValueLookupParameter<IRandom> RandomParameter {
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| 40 | get { return (ValueLookupParameter<IRandom>)Parameters["Random"]; }
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| 41 | }
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[3048] | 42 | public ValueLookupParameter<BoolValue> MaximizationParameter {
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| 43 | get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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[3044] | 44 | }
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[3074] | 45 | public LookupParameter<DoubleValue> QualityParameter {
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| 46 | get { return (LookupParameter<DoubleValue>)Parameters["Quality"]; }
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[3044] | 47 | }
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[3141] | 48 | public ValueLookupParameter<DoubleValue> BestKnownQualityParameter {
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| 49 | get { return (ValueLookupParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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| 50 | }
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[3074] | 51 | public LookupParameter<DoubleValue> MoveQualityParameter {
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| 52 | get { return (LookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
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| 53 | }
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[3104] | 54 | public LookupParameter<BoolValue> MoveTabuParameter {
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| 55 | get { return (LookupParameter<BoolValue>)Parameters["MoveTabu"]; }
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| 56 | }
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[3048] | 57 | public ValueLookupParameter<IntValue> MaximumIterationsParameter {
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| 58 | get { return (ValueLookupParameter<IntValue>)Parameters["MaximumIterations"]; }
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[3044] | 59 | }
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[3048] | 60 | public ValueLookupParameter<IntValue> TabuTenureParameter {
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| 61 | get { return (ValueLookupParameter<IntValue>)Parameters["TabuTenure"]; }
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[3044] | 62 | }
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| 63 | public ValueLookupParameter<IOperator> MoveGeneratorParameter {
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| 64 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveGenerator"]; }
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| 65 | }
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[3074] | 66 | public ValueLookupParameter<IOperator> MoveEvaluatorParameter {
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| 67 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveEvaluator"]; }
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[3044] | 68 | }
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[3074] | 69 | public ValueLookupParameter<IOperator> MoveMakerParameter {
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| 70 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveMaker"]; }
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[3044] | 71 | }
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[3074] | 72 | public ValueLookupParameter<IOperator> TabuMoveEvaluatorParameter {
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| 73 | get { return (ValueLookupParameter<IOperator>)Parameters["TabuMoveEvaluator"]; }
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[3044] | 74 | }
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[3074] | 75 | public ValueLookupParameter<IOperator> TabuMoveMakerParameter {
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| 76 | get { return (ValueLookupParameter<IOperator>)Parameters["TabuMoveMaker"]; }
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[3044] | 77 | }
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[3141] | 78 | public ValueLookupParameter<IOperator> VisualizerParameter {
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| 79 | get { return (ValueLookupParameter<IOperator>)Parameters["Visualizer"]; }
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[3044] | 80 | }
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[3141] | 81 | public LookupParameter<IItem> VisualizationParameter {
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| 82 | get { return (LookupParameter<IItem>)Parameters["Visualization"]; }
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[3044] | 83 | }
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[3141] | 84 | public ValueLookupParameter<VariableCollection> ResultsParameter {
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| 85 | get { return (ValueLookupParameter<VariableCollection>)Parameters["Results"]; }
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| 86 | }
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[3044] | 87 | #endregion
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| 88 |
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[3145] | 89 | [StorableConstructor]
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| 90 | private TabuSearchMainLoop(bool deserializing) : base() { }
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[3100] | 91 | public TabuSearchMainLoop()
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[3044] | 92 | : base() {
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[3145] | 93 | Initialize();
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| 94 | }
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| 95 |
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| 96 | private void Initialize() {
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[3044] | 97 | #region Create parameters
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| 98 | Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
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[3048] | 99 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false."));
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[3074] | 100 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
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[3141] | 101 | Parameters.Add(new ValueLookupParameter<DoubleValue>("BestKnownQuality", "The best known quality value found so far."));
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[3074] | 102 | Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The value which represents the quality of a move."));
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[3104] | 103 | Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The value that indicates if a move is tabu or not."));
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[3048] | 104 | Parameters.Add(new ValueLookupParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed."));
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| 105 | Parameters.Add(new ValueLookupParameter<IntValue>("TabuTenure", "The length of the tabu list, and also means the number of iterations a move is kept tabu"));
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[3145] | 106 |
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[3044] | 107 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveGenerator", "The operator that generates the moves."));
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| 108 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveMaker", "The operator that performs a move and updates the quality."));
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[3074] | 109 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveEvaluator", "The operator that evaluates a move."));
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| 110 | Parameters.Add(new ValueLookupParameter<IOperator>("TabuMoveEvaluator", "The operator that evaluates whether a move is tabu."));
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| 111 | Parameters.Add(new ValueLookupParameter<IOperator>("TabuMoveMaker", "The operator that declares a move tabu."));
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[3044] | 112 |
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[3141] | 113 | Parameters.Add(new ValueLookupParameter<IOperator>("Visualizer", "The operator used to visualize solutions."));
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| 114 | Parameters.Add(new LookupParameter<IItem>("Visualization", "The item which represents the visualization of solutions."));
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| 115 | Parameters.Add(new ValueLookupParameter<VariableCollection>("Results", "The variable collection where results should be stored."));
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[3044] | 116 | #endregion
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| 117 |
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| 118 | #region Create operators
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| 119 | TabuListCreator tabuListCreator = new TabuListCreator();
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| 120 | VariableCreator variableCreator = new VariableCreator();
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[3141] | 121 | BestQualityMemorizer bestQualityMemorizer1 = new BestQualityMemorizer();
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| 122 | BestQualityMemorizer bestQualityMemorizer2 = new BestQualityMemorizer();
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| 123 | QualityDifferenceCalculator qualityDifferenceCalculator1 = new QualityDifferenceCalculator();
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| 124 | Placeholder visualizer1 = new Placeholder();
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[3044] | 125 | ResultsCollector resultsCollector = new ResultsCollector();
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[3193] | 126 | UniformSubScopesProcessor mainProcessor = new UniformSubScopesProcessor();
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[3044] | 127 | Placeholder moveGenerator = new Placeholder();
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[3193] | 128 | UniformSubScopesProcessor moveEvaluationProcessor = new UniformSubScopesProcessor();
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[3074] | 129 | Placeholder moveEvaluator = new Placeholder();
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| 130 | Placeholder tabuMoveEvaluator = new Placeholder();
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[3044] | 131 | SubScopesSorter moveQualitySorter = new SubScopesSorter();
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| 132 | BestAverageWorstQualityCalculator bestAverageWorstMoveQualityCalculator = new BestAverageWorstQualityCalculator();
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| 133 | TabuSelector tabuSelector = new TabuSelector();
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[3195] | 134 | ConditionalBranch emptyNeighborhoodBranch1 = new ConditionalBranch();
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[3044] | 135 | RightReducer rightReducer = new RightReducer();
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[3193] | 136 | UniformSubScopesProcessor moveMakingProcessor = new UniformSubScopesProcessor();
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[3074] | 137 | Placeholder tabuMoveMaker = new Placeholder();
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[3044] | 138 | Placeholder moveMaker = new Placeholder();
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| 139 | DataTableValuesCollector valuesCollector = new DataTableValuesCollector();
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[3195] | 140 | SubScopesRemover subScopesRemover1 = new SubScopesRemover();
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| 141 | ConditionalBranch emptyNeighborhoodBranch2 = new ConditionalBranch();
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| 142 | UniformSubScopesProcessor removeMoves = new UniformSubScopesProcessor();
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| 143 | SubScopesRemover subScopesRemover2 = new SubScopesRemover();
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[3044] | 144 | IntCounter iterationsCounter = new IntCounter();
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| 145 | Comparator iterationsComparator = new Comparator();
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[3141] | 146 | BestQualityMemorizer bestQualityMemorizer3 = new BestQualityMemorizer();
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| 147 | BestQualityMemorizer bestQualityMemorizer4 = new BestQualityMemorizer();
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| 148 | QualityDifferenceCalculator qualityDifferenceCalculator2 = new QualityDifferenceCalculator();
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| 149 | Placeholder visualizer2 = new Placeholder();
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[3044] | 150 | ConditionalBranch iterationsTermination = new ConditionalBranch();
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| 151 |
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[3048] | 152 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Iterations", new IntValue(0)));
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| 153 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Best Move Quality", new DoubleValue(0)));
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| 154 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Average Move Quality", new DoubleValue(0)));
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| 155 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Worst Move Quality", new DoubleValue(0)));
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[3044] | 156 | variableCreator.CollectedValues.Add(new ValueParameter<DataTable>("MoveQualities", new DataTable("MoveQualities")));
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[3195] | 157 | variableCreator.CollectedValues.Add(new ValueParameter<BoolValue>("EmptyNeighborhood", new BoolValue(false)));
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[3044] | 158 |
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[3141] | 159 | bestQualityMemorizer1.BestQualityParameter.ActualName = "BestQuality";
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| 160 | bestQualityMemorizer1.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 161 | bestQualityMemorizer1.QualityParameter.ActualName = QualityParameter.Name;
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| 162 |
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| 163 | bestQualityMemorizer2.BestQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 164 | bestQualityMemorizer2.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 165 | bestQualityMemorizer2.QualityParameter.ActualName = QualityParameter.Name;
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| 166 |
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| 167 | qualityDifferenceCalculator1.AbsoluteDifferenceParameter.ActualName = "AbsoluteDifferenceBestKnownToBest";
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| 168 | qualityDifferenceCalculator1.FirstQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 169 | qualityDifferenceCalculator1.RelativeDifferenceParameter.ActualName = "RelativeDifferenceBestKnownToBest";
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| 170 | qualityDifferenceCalculator1.SecondQualityParameter.ActualName = "BestQuality";
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| 171 |
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| 172 | visualizer1.Name = "Visualizer (placeholder)";
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| 173 | visualizer1.OperatorParameter.ActualName = VisualizerParameter.Name;
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| 174 |
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[3048] | 175 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
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[3141] | 176 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Quality", null, "BestQuality"));
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[3048] | 177 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
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| 178 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
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| 179 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
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[3044] | 180 | resultsCollector.CollectedValues.Add(new LookupParameter<DataTable>("MoveQualities"));
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[3141] | 181 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Known Quality", null, BestKnownQualityParameter.Name));
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| 182 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Absolute Difference of Best Known Quality to Best Quality", null, "AbsoluteDifferenceBestKnownToBest"));
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| 183 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Relative Difference of Best Known Quality to Best Quality", null, "RelativeDifferenceBestKnownToBest"));
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| 184 | resultsCollector.CollectedValues.Add(new LookupParameter<IItem>("Solution Visualization", null, VisualizationParameter.Name));
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[3044] | 185 | resultsCollector.ResultsParameter.ActualName = "Results";
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| 186 |
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[3193] | 187 | mainProcessor.Name = "Solution processor (UniformSubScopesProcessor)";
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[3044] | 188 |
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| 189 | moveGenerator.Name = "MoveGenerator (placeholder)";
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[3141] | 190 | moveGenerator.OperatorParameter.ActualName = MoveGeneratorParameter.Name;
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[3044] | 191 |
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[3074] | 192 | moveEvaluator.Name = "MoveEvaluator (placeholder)";
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[3141] | 193 | moveEvaluator.OperatorParameter.ActualName = MoveEvaluatorParameter.Name;
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[3044] | 194 |
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[3074] | 195 | tabuMoveEvaluator.Name = "TabuMoveEvaluator (placeholder)";
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[3141] | 196 | tabuMoveEvaluator.OperatorParameter.ActualName = TabuMoveEvaluatorParameter.Name;
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[3044] | 197 |
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[3141] | 198 | moveQualitySorter.DescendingParameter.ActualName = MaximizationParameter.Name;
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| 199 | moveQualitySorter.ValueParameter.ActualName = MoveQualityParameter.Name;
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[3044] | 200 |
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| 201 | bestAverageWorstMoveQualityCalculator.AverageQualityParameter.ActualName = "Average Move Quality";
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| 202 | bestAverageWorstMoveQualityCalculator.BestQualityParameter.ActualName = "Best Move Quality";
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| 203 | bestAverageWorstMoveQualityCalculator.MaximizationParameter.ActualName = "Maximization";
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[3141] | 204 | bestAverageWorstMoveQualityCalculator.QualityParameter.ActualName = MoveQualityParameter.Name;
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[3044] | 205 | bestAverageWorstMoveQualityCalculator.WorstQualityParameter.ActualName = "Worst Move Quality";
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[3145] | 206 |
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[3141] | 207 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
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| 208 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
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| 209 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
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| 210 | valuesCollector.DataTableParameter.ActualName = "MoveQualities";
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[3044] | 211 |
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[3193] | 212 | moveMakingProcessor.Name = "MoveMaking processor (UniformSubScopesProcessor)";
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[3044] | 213 |
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[3195] | 214 | emptyNeighborhoodBranch1.Name = "Neighborhood empty?";
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| 215 | emptyNeighborhoodBranch1.ConditionParameter.ActualName = "EmptyNeighborhood";
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| 216 |
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[3074] | 217 | tabuMoveMaker.Name = "TabuMoveMaker (placeholder)";
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[3141] | 218 | tabuMoveMaker.OperatorParameter.ActualName = TabuMoveMakerParameter.Name;
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[3044] | 219 |
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| 220 | moveMaker.Name = "MoveMaker (placeholder)";
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[3141] | 221 | moveMaker.OperatorParameter.ActualName = MoveMakerParameter.Name;
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[3044] | 222 |
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[3195] | 223 | subScopesRemover1.RemoveAllSubScopes = true;
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[3044] | 224 |
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[3195] | 225 | emptyNeighborhoodBranch2.Name = "Neighborhood empty?";
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| 226 | emptyNeighborhoodBranch2.ConditionParameter.ActualName = "EmptyNeighborhood";
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| 227 |
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| 228 | subScopesRemover2.RemoveAllSubScopes = true;
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| 229 |
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[3044] | 230 | iterationsCounter.Name = "Iterations Counter";
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[3048] | 231 | iterationsCounter.Increment = new IntValue(1);
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[3044] | 232 | iterationsCounter.ValueParameter.ActualName = "Iterations";
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| 233 |
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[3143] | 234 | iterationsComparator.Name = "Iterations >= MaximumIterations";
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| 235 | iterationsComparator.Comparison = new Comparison(ComparisonType.GreaterOrEqual);
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[3044] | 236 | iterationsComparator.LeftSideParameter.ActualName = "Iterations";
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[3141] | 237 | iterationsComparator.RightSideParameter.ActualName = MaximumIterationsParameter.Name;
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[3143] | 238 | iterationsComparator.ResultParameter.ActualName = "Terminate";
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[3044] | 239 |
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[3141] | 240 | bestQualityMemorizer3.BestQualityParameter.ActualName = "BestQuality";
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| 241 | bestQualityMemorizer3.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 242 | bestQualityMemorizer3.QualityParameter.ActualName = QualityParameter.Name;
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| 243 |
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| 244 | bestQualityMemorizer4.BestQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 245 | bestQualityMemorizer4.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 246 | bestQualityMemorizer4.QualityParameter.ActualName = QualityParameter.Name;
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| 247 |
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| 248 | qualityDifferenceCalculator2.AbsoluteDifferenceParameter.ActualName = "AbsoluteDifferenceBestKnownToBest";
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| 249 | qualityDifferenceCalculator2.FirstQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 250 | qualityDifferenceCalculator2.RelativeDifferenceParameter.ActualName = "RelativeDifferenceBestKnownToBest";
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| 251 | qualityDifferenceCalculator2.SecondQualityParameter.ActualName = "BestQuality";
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| 252 |
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| 253 | visualizer2.Name = "Visualizer (placeholder)";
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| 254 | visualizer2.OperatorParameter.ActualName = VisualizerParameter.Name;
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| 255 |
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[3044] | 256 | iterationsTermination.Name = "Iterations Termination Condition";
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[3143] | 257 | iterationsTermination.ConditionParameter.ActualName = "Terminate";
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[3044] | 258 | #endregion
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| 259 |
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| 260 | #region Create operator graph
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| 261 | OperatorGraph.InitialOperator = tabuListCreator;
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| 262 | tabuListCreator.Successor = variableCreator;
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[3141] | 263 | variableCreator.Successor = bestQualityMemorizer1;
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| 264 | bestQualityMemorizer1.Successor = bestQualityMemorizer2;
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| 265 | bestQualityMemorizer2.Successor = qualityDifferenceCalculator1;
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| 266 | qualityDifferenceCalculator1.Successor = visualizer1;
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| 267 | visualizer1.Successor = resultsCollector;
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[3044] | 268 | resultsCollector.Successor = mainProcessor;
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| 269 | mainProcessor.Operator = moveGenerator;
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[3195] | 270 | mainProcessor.Successor = emptyNeighborhoodBranch2;
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[3044] | 271 | moveGenerator.Successor = moveEvaluationProcessor;
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[3074] | 272 | moveEvaluationProcessor.Operator = moveEvaluator;
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[3044] | 273 | moveEvaluationProcessor.Successor = moveQualitySorter;
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[3074] | 274 | moveEvaluator.Successor = tabuMoveEvaluator;
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[3141] | 275 | tabuMoveEvaluator.Successor = null;
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[3044] | 276 | moveQualitySorter.Successor = bestAverageWorstMoveQualityCalculator;
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[3141] | 277 | bestAverageWorstMoveQualityCalculator.Successor = valuesCollector;
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| 278 | valuesCollector.Successor = tabuSelector;
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[3195] | 279 | tabuSelector.Successor = emptyNeighborhoodBranch1;
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| 280 | emptyNeighborhoodBranch1.FalseBranch = rightReducer;
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| 281 | emptyNeighborhoodBranch1.TrueBranch = null;
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| 282 | emptyNeighborhoodBranch1.Successor = null;
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[3044] | 283 | rightReducer.Successor = moveMakingProcessor;
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[3074] | 284 | moveMakingProcessor.Operator = tabuMoveMaker;
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[3195] | 285 | moveMakingProcessor.Successor = subScopesRemover1;
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[3074] | 286 | tabuMoveMaker.Successor = moveMaker;
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[3141] | 287 | moveMaker.Successor = null;
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[3195] | 288 | subScopesRemover1.Successor = null;
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| 289 | emptyNeighborhoodBranch2.FalseBranch = iterationsCounter;
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| 290 | emptyNeighborhoodBranch2.TrueBranch = removeMoves;
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| 291 | emptyNeighborhoodBranch2.Successor = null;
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| 292 | removeMoves.Operator = subScopesRemover2;
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| 293 | removeMoves.Successor = null;
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| 294 | subScopesRemover2.Successor = null;
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[3044] | 295 | iterationsCounter.Successor = iterationsComparator;
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[3141] | 296 | iterationsComparator.Successor = bestQualityMemorizer3;
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| 297 | bestQualityMemorizer3.Successor = bestQualityMemorizer4;
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| 298 | bestQualityMemorizer4.Successor = qualityDifferenceCalculator2;
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| 299 | qualityDifferenceCalculator2.Successor = visualizer2;
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| 300 | visualizer2.Successor = iterationsTermination;
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[3143] | 301 | iterationsTermination.TrueBranch = null;
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| 302 | iterationsTermination.FalseBranch = mainProcessor;
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[3044] | 303 | #endregion
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| 304 | }
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| 305 | }
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| 306 | }
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