1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 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 System.Linq;
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23 | using HeuristicLab.Algorithms.GeneticAlgorithm;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Data;
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27 | using HeuristicLab.Operators;
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28 | using HeuristicLab.Optimization;
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29 | using HeuristicLab.Optimization.Operators;
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30 | using HeuristicLab.Parameters;
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31 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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32 | using HeuristicLab.Selection;
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33 |
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34 | namespace HeuristicLab.Algorithms.ALPS {
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35 |
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36 | [Item("AlpsGeneticAlgorithmMainLoop", "An ALPS genetic algorithm main loop operator.")]
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37 | [StorableClass]
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38 | public sealed class AlpsGeneticAlgorithmMainLoop : AlgorithmOperator {
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39 | #region Parameter Properties
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40 | public ValueLookupParameter<BoolValue> MaximizationParameter {
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41 | get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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42 | }
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43 | public ScopeTreeLookupParameter<DoubleValue> QualityParameter {
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44 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Quality"]; }
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45 | }
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46 | public ILookupParameter<IOperator> AnalyzerParameter {
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47 | get { return (ILookupParameter<IOperator>)Parameters["Analyzer"]; }
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48 | }
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49 | public ILookupParameter<IOperator> LayerAnalyzerParameter {
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50 | get { return (ILookupParameter<IOperator>)Parameters["LayerAnalyzer"]; }
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51 | }
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52 | #endregion
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53 |
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54 | public GeneticAlgorithmMainLoop MainOperator {
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55 | get { return OperatorGraph.Iterate().OfType<GeneticAlgorithmMainLoop>().First(); }
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56 | }
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57 |
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58 | [StorableConstructor]
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59 | private AlpsGeneticAlgorithmMainLoop(bool deserializing)
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60 | : base(deserializing) { }
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61 | private AlpsGeneticAlgorithmMainLoop(AlpsGeneticAlgorithmMainLoop original, Cloner cloner)
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62 | : base(original, cloner) { }
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63 | public override IDeepCloneable Clone(Cloner cloner) {
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64 | return new AlpsGeneticAlgorithmMainLoop(this, cloner);
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65 | }
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66 | public AlpsGeneticAlgorithmMainLoop()
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67 | : base() {
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68 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false.") { Hidden = true });
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69 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
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70 | Parameters.Add(new LookupParameter<IntValue>("MaximumGenerations", "The maximum number of generations that the algorithm should process."));
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71 | Parameters.Add(new LookupParameter<IOperator>("Analyzer", "The operator used to the analyze all individuals."));
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72 | Parameters.Add(new LookupParameter<IOperator>("LayerAnalyzer", "The operator used to analyze each layer."));
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73 |
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74 | var variableCreator = new VariableCreator() { Name = "Initialize" };
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75 | var initLayerAnalyzerProcessor = new SubScopesProcessor();
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76 | var layerVariableCreator = new VariableCreator() { Name = "Initialize Layer" };
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77 | var initLayerAnalyzerPlaceholder = new Placeholder() { Name = "LayerAnalyzer (Placeholder)" };
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78 | var initAnalyzerPlaceholder = new Placeholder() { Name = "Analyzer (Placeholder)" };
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79 | var resultsCollector = new ResultsCollector();
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80 | var matingPoolCreator = new MatingPoolCreator() { Name = "Create Mating Pools" };
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81 | var matingPoolProcessor = new UniformSubScopesProcessor() { Name = "Process Mating Pools" };
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82 | var initializeLayer = new Assigner() { Name = "Reset LayerEvaluatedSolutions" };
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83 | var mainOperator = AlpsGeneticAlgorithmMainOperator.Create();
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84 | var generationsIcrementor = new IntCounter() { Name = "Increment Generations" };
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85 | var evaluatedSolutionsReducer = new DataReducer() { Name = "Increment EvaluatedSolutions" };
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86 | var eldersEmigrator = CreateEldersEmigrator();
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87 | var layerOpener = CreateLayerOpener();
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88 | var layerReseeder = CreateReseeder();
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89 | var layerAnalyzerProcessor = new UniformSubScopesProcessor();
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90 | var layerAnalyzerPlaceholder = new Placeholder() { Name = "LayerAnalyzer (Placeholder)" };
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91 | var analyzerPlaceholder = new Placeholder() { Name = "Analyzer (Placeholder)" };
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92 | var termination = new TerminationOperator();
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93 |
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94 | OperatorGraph.InitialOperator = variableCreator;
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95 |
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96 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Generations", new IntValue(0)));
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97 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("OpenLayers", new IntValue(1)));
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98 | variableCreator.Successor = initLayerAnalyzerProcessor;
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99 |
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100 | initLayerAnalyzerProcessor.Operators.Add(layerVariableCreator);
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101 | initLayerAnalyzerProcessor.Successor = initAnalyzerPlaceholder;
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102 |
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103 | layerVariableCreator.CollectedValues.Add(new ValueParameter<IntValue>("LayerEvaluatedSolutions"));
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104 | layerVariableCreator.CollectedValues.Add(new ValueParameter<ResultCollection>("LayerResults"));
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105 | layerVariableCreator.Successor = initLayerAnalyzerPlaceholder;
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106 |
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107 | initLayerAnalyzerPlaceholder.OperatorParameter.ActualName = LayerAnalyzerParameter.Name;
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108 | initLayerAnalyzerPlaceholder.Successor = null;
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109 |
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110 | initAnalyzerPlaceholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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111 | initAnalyzerPlaceholder.Successor = resultsCollector;
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112 |
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113 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Generations"));
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114 | resultsCollector.CollectedValues.Add(new ScopeTreeLookupParameter<ResultCollection>("LayerResults", "Result set for each layer", "LayerResults"));
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115 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("OpenLayers"));
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116 | resultsCollector.CopyValue = new BoolValue(false);
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117 | resultsCollector.Successor = matingPoolCreator;
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118 |
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119 | matingPoolCreator.Successor = matingPoolProcessor;
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120 |
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121 | matingPoolProcessor.Parallel.Value = true;
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122 | matingPoolProcessor.Operator = initializeLayer;
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123 | matingPoolProcessor.Successor = generationsIcrementor;
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124 |
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125 | initializeLayer.LeftSideParameter.ActualName = "LayerEvaluatedSolutions";
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126 | initializeLayer.RightSideParameter.Value = new IntValue(0);
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127 | initializeLayer.Successor = mainOperator;
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128 |
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129 | generationsIcrementor.ValueParameter.ActualName = "Generations";
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130 | generationsIcrementor.Increment = new IntValue(1);
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131 | generationsIcrementor.Successor = evaluatedSolutionsReducer;
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132 |
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133 | evaluatedSolutionsReducer.ParameterToReduce.ActualName = "LayerEvaluatedSolutions";
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134 | evaluatedSolutionsReducer.TargetParameter.ActualName = "EvaluatedSolutions";
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135 | evaluatedSolutionsReducer.ReductionOperation.Value = new ReductionOperation(ReductionOperations.Sum);
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136 | evaluatedSolutionsReducer.TargetOperation.Value = new ReductionOperation(ReductionOperations.Sum);
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137 | evaluatedSolutionsReducer.Successor = eldersEmigrator;
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138 |
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139 | eldersEmigrator.Successor = layerOpener;
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140 |
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141 | layerOpener.Successor = layerReseeder;
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142 |
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143 | layerReseeder.Successor = layerAnalyzerProcessor;
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144 |
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145 | layerAnalyzerProcessor.Operator = layerAnalyzerPlaceholder;
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146 | layerAnalyzerProcessor.Successor = analyzerPlaceholder;
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147 |
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148 | layerAnalyzerPlaceholder.OperatorParameter.ActualName = LayerAnalyzerParameter.Name;
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149 |
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150 | analyzerPlaceholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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151 | analyzerPlaceholder.Successor = termination;
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152 |
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153 | termination.ContinueBranch = matingPoolCreator;
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154 | }
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155 |
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156 | private static CombinedOperator CreateEldersEmigrator() {
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157 | var eldersEmigrator = new CombinedOperator() { Name = "Emigrate Elders" };
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158 | var selectorProsessor = new UniformSubScopesProcessor();
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159 | var eldersSelector = new EldersSelector();
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160 | var shiftToRightMigrator = new UnidirectionalRingMigrator() { Name = "Shift elders to next Layer" };
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161 | var mergingProsessor = new UniformSubScopesProcessor();
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162 | var mergingReducer = new MergingReducer();
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163 | var subScopesCounter = new SubScopesCounter();
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164 | var countCalculator = new ExpressionCalculator() { Name = "LayerPopulationSize = Min(LayerPopulationSize, PopulationSize)" };
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165 | var bestSelector = new BestSelector();
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166 | var rightReducer = new RightReducer();
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167 |
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168 | eldersEmigrator.OperatorGraph.InitialOperator = selectorProsessor;
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169 |
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170 | selectorProsessor.Operator = eldersSelector;
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171 | selectorProsessor.Successor = shiftToRightMigrator;
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172 |
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173 | shiftToRightMigrator.ClockwiseMigrationParameter.Value = new BoolValue(true);
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174 | shiftToRightMigrator.Successor = mergingProsessor;
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175 |
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176 | mergingProsessor.Operator = mergingReducer;
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177 |
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178 | mergingReducer.Successor = subScopesCounter;
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179 |
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180 | subScopesCounter.ValueParameter.ActualName = "LayerPopulationSize";
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181 | subScopesCounter.AccumulateParameter.Value = new BoolValue(false);
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182 | subScopesCounter.Successor = countCalculator;
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183 |
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184 | countCalculator.CollectedValues.Add(new LookupParameter<IntValue>("PopulationSize"));
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185 | countCalculator.CollectedValues.Add(new LookupParameter<IntValue>("LayerPopulationSize"));
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186 | countCalculator.ExpressionParameter.Value = new StringValue("LayerPopulationSize PopulationSize LayerPopulationSize PopulationSize < if toint");
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187 | countCalculator.ExpressionResultParameter.ActualName = "LayerPopulationSize";
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188 | countCalculator.Successor = bestSelector;
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189 |
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190 | bestSelector.NumberOfSelectedSubScopesParameter.ActualName = "LayerPopulationSize";
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191 | bestSelector.CopySelected = new BoolValue(false);
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192 | bestSelector.Successor = rightReducer;
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193 |
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194 | return eldersEmigrator;
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195 | }
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196 |
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197 | private static CombinedOperator CreateLayerOpener() {
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198 | var layerOpener = new CombinedOperator() { Name = "Open new Layer if needed" };
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199 | var maxLayerReached = new Comparator() { Name = "MaxLayersReached = OpenLayers >= NumberOfLayers" };
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200 | var maxLayerReachedBranch = new ConditionalBranch() { Name = "MaxLayersReached?" };
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201 | var openNewLayerCalculator = new ExpressionCalculator() { Name = "OpenNewLayer = Generations >= AgeLimits[OpenLayers - 1]" };
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202 | var openNewLayerBranch = new ConditionalBranch() { Name = "OpenNewLayer?" };
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203 | var layerCreator = new LayerCreator() { Name = "Create Layer" };
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204 | var createChildrenViaCrossover = AlpsGeneticAlgorithmMainOperator.Create();
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205 | var incrEvaluatedSolutionsForNewLayer = new SubScopesCounter() { Name = "Update EvaluatedSolutions" };
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206 | var incrOpenLayers = new IntCounter() { Name = "Incr. OpenLayers" };
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207 | var newLayerResultsCollector = new ResultsCollector() { Name = "Collect new Layer Results" };
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208 |
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209 | layerOpener.OperatorGraph.InitialOperator = maxLayerReached;
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210 |
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211 | maxLayerReached.LeftSideParameter.ActualName = "OpenLayers";
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212 | maxLayerReached.RightSideParameter.ActualName = "NumberOfLayers";
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213 | maxLayerReached.ResultParameter.ActualName = "MaxLayerReached";
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214 | maxLayerReached.Comparison = new Comparison(ComparisonType.GreaterOrEqual);
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215 | maxLayerReached.Successor = maxLayerReachedBranch;
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216 |
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217 | maxLayerReachedBranch.ConditionParameter.ActualName = "MaxLayerReached";
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218 | maxLayerReachedBranch.FalseBranch = openNewLayerCalculator;
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219 |
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220 | openNewLayerCalculator.CollectedValues.Add(new LookupParameter<IntArray>("AgeLimits"));
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221 | openNewLayerCalculator.CollectedValues.Add(new LookupParameter<IntValue>("Generations"));
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222 | openNewLayerCalculator.CollectedValues.Add(new LookupParameter<IntValue>("NumberOfLayers"));
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223 | openNewLayerCalculator.CollectedValues.Add(new LookupParameter<IntValue>("OpenLayers"));
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224 | openNewLayerCalculator.ExpressionResultParameter.ActualName = "OpenNewLayer";
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225 | openNewLayerCalculator.ExpressionParameter.Value = new StringValue("Generations 1 + AgeLimits OpenLayers 1 - [] >");
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226 | openNewLayerCalculator.Successor = openNewLayerBranch;
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227 |
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228 | openNewLayerBranch.ConditionParameter.ActualName = "OpenNewLayer";
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229 | openNewLayerBranch.TrueBranch = layerCreator;
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230 |
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231 | layerCreator.NewLayerOperator = createChildrenViaCrossover;
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232 | layerCreator.Successor = incrOpenLayers;
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233 |
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234 | createChildrenViaCrossover.Successor = incrEvaluatedSolutionsForNewLayer;
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235 |
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236 | incrEvaluatedSolutionsForNewLayer.ValueParameter.ActualName = "EvaluatedSolutions";
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237 | incrEvaluatedSolutionsForNewLayer.AccumulateParameter.Value = new BoolValue(true);
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238 |
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239 | incrOpenLayers.ValueParameter.ActualName = "OpenLayers";
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240 | incrOpenLayers.Increment = new IntValue(1);
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241 | incrOpenLayers.Successor = newLayerResultsCollector;
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242 |
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243 | newLayerResultsCollector.CollectedValues.Add(new ScopeTreeLookupParameter<ResultCollection>("LayerResults", "Result set for each layer", "LayerResults"));
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244 | newLayerResultsCollector.CopyValue = new BoolValue(false);
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245 | newLayerResultsCollector.Successor = null;
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246 |
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247 | return layerOpener;
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248 | }
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249 |
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250 | private static CombinedOperator CreateReseeder() {
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251 | var reseeder = new CombinedOperator() { Name = "Reseed Layer Zero if needed" };
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252 | var reseedingController = new ReseedingController() { Name = "Reseeding needed (Generation % AgeGap == 0)?" };
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253 | var removeIndividuals = new SubScopesRemover();
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254 | var createIndividuals = new SolutionsCreator();
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255 | var initializeAgeProsessor = new UniformSubScopesProcessor();
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256 | var initializeAge = new VariableCreator() { Name = "Initialize Age" };
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257 | var incrEvaluatedSolutionsAfterReseeding = new SubScopesCounter() { Name = "Update EvaluatedSolutions" };
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258 |
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259 | reseeder.OperatorGraph.InitialOperator = reseedingController;
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260 |
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261 | reseedingController.FirstLayerOperator = removeIndividuals;
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262 |
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263 | removeIndividuals.Successor = createIndividuals;
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264 |
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265 | createIndividuals.NumberOfSolutionsParameter.ActualName = "PopulationSize";
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266 | createIndividuals.Successor = initializeAgeProsessor;
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267 |
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268 | initializeAgeProsessor.Operator = initializeAge;
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269 | initializeAgeProsessor.Successor = incrEvaluatedSolutionsAfterReseeding;
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270 |
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271 | initializeAge.CollectedValues.Add(new ValueParameter<DoubleValue>("Age", new DoubleValue(0)));
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272 |
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273 | incrEvaluatedSolutionsAfterReseeding.ValueParameter.ActualName = "EvaluatedSolutions";
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274 | incrEvaluatedSolutionsAfterReseeding.AccumulateParameter.Value = new BoolValue(true);
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275 |
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276 | return reseeder;
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277 | }
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278 | }
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279 | } |
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