[11580] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[12018] | 3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[11580] | 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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[11583] | 22 | using System.Linq;
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| 23 | using HeuristicLab.Algorithms.GeneticAlgorithm;
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[11580] | 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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[13111] | 32 | using HeuristicLab.Selection;
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[11580] | 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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[11585] | 37 | [StorableClass]
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[11583] | 38 | public sealed class AlpsGeneticAlgorithmMainLoop : AlgorithmOperator {
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[11580] | 39 | #region Parameter Properties
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[12045] | 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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[11580] | 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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[11583] | 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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[11580] | 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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[12997] | 68 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false.") { Hidden = true });
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[12045] | 69 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
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[11580] | 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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[11590] | 76 | var layerVariableCreator = new VariableCreator() { Name = "Initialize Layer" };
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[11580] | 77 | var initLayerAnalyzerPlaceholder = new Placeholder() { Name = "LayerAnalyzer (Placeholder)" };
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[11609] | 78 | var initAnalyzerPlaceholder = new Placeholder() { Name = "Analyzer (Placeholder)" };
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| 79 | var resultsCollector = new ResultsCollector();
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[11583] | 80 | var matingPoolCreator = new MatingPoolCreator() { Name = "Create Mating Pools" };
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[13113] | 81 | var matingPoolProcessor = new UniformSubScopesProcessor() { Name = "Process Mating Pools" };
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[11590] | 82 | var initializeLayer = new Assigner() { Name = "Reset LayerEvaluatedSolutions" };
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[13095] | 83 | var mainOperator = AlpsGeneticAlgorithmMainOperator.Create();
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[11583] | 84 | var generationsIcrementor = new IntCounter() { Name = "Increment Generations" };
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| 85 | var evaluatedSolutionsReducer = new DataReducer() { Name = "Increment EvaluatedSolutions" };
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[13111] | 86 | var eldersEmigrator = CreateEldersEmigrator();
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| 87 | var layerOpener = CreateLayerOpener();
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| 88 | var layerReseeder = CreateReseeder();
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[12992] | 89 | var layerAnalyzerProcessor = new UniformSubScopesProcessor();
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[12197] | 90 | var layerAnalyzerPlaceholder = new Placeholder() { Name = "LayerAnalyzer (Placeholder)" };
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[11580] | 91 | var analyzerPlaceholder = new Placeholder() { Name = "Analyzer (Placeholder)" };
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[12531] | 92 | var termination = new TerminationOperator();
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[11580] | 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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[11586] | 97 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("OpenLayers", new IntValue(1)));
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[11609] | 98 | variableCreator.Successor = initLayerAnalyzerProcessor;
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[11580] | 99 |
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[11590] | 100 | initLayerAnalyzerProcessor.Operators.Add(layerVariableCreator);
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[11609] | 101 | initLayerAnalyzerProcessor.Successor = initAnalyzerPlaceholder;
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[11580] | 102 |
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[11590] | 103 | layerVariableCreator.CollectedValues.Add(new ValueParameter<IntValue>("LayerEvaluatedSolutions"));
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[12071] | 104 | layerVariableCreator.CollectedValues.Add(new ValueParameter<ResultCollection>("LayerResults"));
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[11590] | 105 | layerVariableCreator.Successor = initLayerAnalyzerPlaceholder;
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| 106 |
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[11580] | 107 | initLayerAnalyzerPlaceholder.OperatorParameter.ActualName = LayerAnalyzerParameter.Name;
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| 108 | initLayerAnalyzerPlaceholder.Successor = null;
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| 109 |
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[11609] | 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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[12071] | 114 | resultsCollector.CollectedValues.Add(new ScopeTreeLookupParameter<ResultCollection>("LayerResults", "Result set for each layer", "LayerResults"));
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[11609] | 115 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("OpenLayers"));
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| 116 | resultsCollector.CopyValue = new BoolValue(false);
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[13031] | 117 | resultsCollector.Successor = matingPoolCreator;
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[11609] | 118 |
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[11580] | 119 | matingPoolCreator.Successor = matingPoolProcessor;
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| 120 |
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| 121 | matingPoolProcessor.Parallel.Value = true;
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[11590] | 122 | matingPoolProcessor.Operator = initializeLayer;
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[11583] | 123 | matingPoolProcessor.Successor = generationsIcrementor;
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[11580] | 124 |
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[11590] | 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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[11583] | 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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[11676] | 133 | evaluatedSolutionsReducer.ParameterToReduce.ActualName = "LayerEvaluatedSolutions";
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[11583] | 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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[13095] | 139 | eldersEmigrator.Successor = layerOpener;
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[11580] | 140 |
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[13095] | 141 | layerOpener.Successor = layerReseeder;
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[11580] | 142 |
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[13095] | 143 | layerReseeder.Successor = layerAnalyzerProcessor;
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| 144 |
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[12197] | 145 | layerAnalyzerProcessor.Operator = layerAnalyzerPlaceholder;
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| 146 | layerAnalyzerProcessor.Successor = analyzerPlaceholder;
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[11580] | 147 |
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[12197] | 148 | layerAnalyzerPlaceholder.OperatorParameter.ActualName = LayerAnalyzerParameter.Name;
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[11580] | 149 |
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| 150 | analyzerPlaceholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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[12531] | 151 | analyzerPlaceholder.Successor = termination;
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[11580] | 152 |
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[13031] | 153 | termination.ContinueBranch = matingPoolCreator;
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[11583] | 154 | }
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[13111] | 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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[13113] | 160 | var shiftToRightMigrator = new UnidirectionalRingMigrator() { Name = "Shift elders to next Layer" };
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[13111] | 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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[11580] | 278 | }
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| 279 | } |
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