[3093] | 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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| 26 | using HeuristicLab.Optimization.Operators;
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| 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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| 31 | namespace HeuristicLab.Algorithms.SimulatedAnnealing {
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| 32 | /// <summary>
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| 33 | /// An operator which represents a simulated annealing.
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| 34 | /// </summary>
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| 35 | [Item("SimulatedAnnealingMainLoop", "An operator which represents the main loop of a simulated annealing algorithm.")]
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| 36 | [StorableClass]
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| 37 | public sealed class SimulatedAnnealingMainLoop : AlgorithmOperator {
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| 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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| 42 | public ValueLookupParameter<BoolValue> MaximizationParameter {
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| 43 | get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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| 44 | }
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| 45 | public LookupParameter<DoubleValue> QualityParameter {
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| 46 | get { return (LookupParameter<DoubleValue>)Parameters["Quality"]; }
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| 47 | }
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| 48 | public LookupParameter<DoubleValue> MoveQualityParameter {
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| 49 | get { return (LookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
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| 50 | }
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| 51 | public ValueLookupParameter<DoubleValue> StartTemperatureParameter {
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| 52 | get { return (ValueLookupParameter<DoubleValue>)Parameters["StartTemperature"]; }
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| 53 | }
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| 54 | public ValueLookupParameter<DoubleValue> EndTemperatureParameter {
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| 55 | get { return (ValueLookupParameter<DoubleValue>)Parameters["EndTemperature"]; }
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| 56 | }
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[3101] | 57 | public ValueLookupParameter<IntValue> InnerIterationsParameter {
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| 58 | get { return (ValueLookupParameter<IntValue>)Parameters["InnerIterations"]; }
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| 59 | }
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[3093] | 60 | public ValueLookupParameter<IntValue> MaximumIterationsParameter {
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| 61 | get { return (ValueLookupParameter<IntValue>)Parameters["MaximumIterations"]; }
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| 62 | }
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| 63 | public ValueLookupParameter<VariableCollection> ResultsParameter {
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| 64 | get { return (ValueLookupParameter<VariableCollection>)Parameters["Results"]; }
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| 65 | }
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| 66 | public ValueLookupParameter<IOperator> MoveGeneratorParameter {
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| 67 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveGenerator"]; }
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| 68 | }
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| 69 | public ValueLookupParameter<IOperator> MoveEvaluatorParameter {
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| 70 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveEvaluator"]; }
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| 71 | }
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| 72 | public ValueLookupParameter<IOperator> MoveMakerParameter {
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| 73 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveMaker"]; }
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| 74 | }
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| 75 | public ValueLookupParameter<IOperator> AnnealingOperatorParameter {
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| 76 | get { return (ValueLookupParameter<IOperator>)Parameters["AnnealingOperator"]; }
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| 77 | }
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| 78 |
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| 79 | private ScopeParameter CurrentScopeParameter {
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| 80 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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| 81 | }
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| 82 | public IScope CurrentScope {
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| 83 | get { return CurrentScopeParameter.ActualValue; }
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| 84 | }
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| 85 | #endregion
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| 86 |
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| 87 | [StorableConstructor]
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| 88 | private SimulatedAnnealingMainLoop(bool deserializing) : base() { }
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| 89 | public SimulatedAnnealingMainLoop()
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| 90 | : base() {
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| 91 | Initialize();
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| 92 | }
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| 93 |
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| 94 | private void Initialize() {
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| 95 | #region Create parameters
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| 96 | Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
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| 97 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false."));
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| 98 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
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| 99 | Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The value which represents the quality of a move."));
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[3094] | 100 | Parameters.Add(new ValueLookupParameter<DoubleValue>("StartTemperature", "The initial temperature."));
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| 101 | Parameters.Add(new ValueLookupParameter<DoubleValue>("EndTemperature", "The end temperature."));
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[3101] | 102 | Parameters.Add(new ValueLookupParameter<IntValue>("InnerIterations", "The amount of inner iterations (number of moves before temperature is adjusted again)."));
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[3093] | 103 | Parameters.Add(new ValueLookupParameter<IntValue>("MaximumIterations", "The maximum number of iterations which should be processed."));
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| 104 | Parameters.Add(new ValueLookupParameter<VariableCollection>("Results", "The variable collection where results should be stored."));
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| 105 |
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| 106 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveGenerator", "The operator that generates the moves."));
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| 107 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveEvaluator", "The operator that evaluates a move."));
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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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| 109 | Parameters.Add(new ValueLookupParameter<IOperator>("AnnealingOperator", "The operator that modifies the temperature."));
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| 110 |
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| 111 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope which represents a population of solutions on which the TS should be applied."));
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| 112 | #endregion
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| 113 |
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| 114 | #region Create operators
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[3094] | 115 | VariableCreator variableCreator = new VariableCreator();
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| 116 | BestQualityMemorizer initializeBestQuality = new BestQualityMemorizer();
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| 117 | SequentialSubScopesProcessor sssp = new SequentialSubScopesProcessor();
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| 118 | ResultsCollector resultsCollector = new ResultsCollector();
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| 119 | BestQualityMemorizer bestQualityMemorizer = new BestQualityMemorizer();
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| 120 | Placeholder annealingOperator = new Placeholder();
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| 121 | UniformSequentialSubScopesProcessor mainProcessor = new UniformSequentialSubScopesProcessor();
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[3101] | 122 | DataTableValuesCollector valuesCollector = new DataTableValuesCollector();
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[3094] | 123 | Placeholder moveGenerator = new Placeholder();
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[3101] | 124 | UniformSequentialSubScopesProcessor moveEvaluationProcessor = new UniformSequentialSubScopesProcessor();
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[3094] | 125 | Placeholder moveEvaluator = new Placeholder();
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| 126 | ProbabilisticQualityComparator qualityComparator = new ProbabilisticQualityComparator();
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| 127 | ConditionalBranch improvesQualityBranch = new ConditionalBranch();
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| 128 | Placeholder moveMaker = new Placeholder();
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| 129 | SubScopesRemover subScopesRemover = new SubScopesRemover();
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| 130 | IntCounter iterationsCounter = new IntCounter();
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| 131 | Comparator iterationsComparator = new Comparator();
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| 132 | ConditionalBranch iterationsTermination = new ConditionalBranch();
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| 133 | EmptyOperator finished = new EmptyOperator();
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| 134 |
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| 135 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Iterations", new IntValue(0)));
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| 136 | variableCreator.CollectedValues.Add(new ValueParameter<DataTable>("Qualities", new DataTable("Qualities")));
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| 137 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Temperature", new DoubleValue(double.MaxValue)));
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| 138 |
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| 139 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
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| 140 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Quality"));
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| 141 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Quality") { ActualName = "BestQuality" });
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| 142 | resultsCollector.CollectedValues.Add(new LookupParameter<DataTable>("Qualities"));
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| 143 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Temperature"));
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| 144 |
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| 145 | annealingOperator.Name = "Annealing operator (placeholder)";
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| 146 | annealingOperator.OperatorParameter.ActualName = "AnnealingOperator";
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| 147 |
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[3101] | 148 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Quality"));
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| 149 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("BestQuality"));
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| 150 | valuesCollector.DataTableParameter.ActualName = "Qualities";
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| 151 |
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[3094] | 152 | moveGenerator.Name = "Move generator (placeholder)";
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| 153 | moveGenerator.OperatorParameter.ActualName = "MoveGenerator";
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| 154 |
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| 155 | moveEvaluator.Name = "Move evaluator (placeholder)";
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| 156 | moveEvaluator.OperatorParameter.ActualName = "MoveEvaluator";
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| 157 |
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| 158 | qualityComparator.LeftSideParameter.ActualName = "MoveQuality";
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| 159 | qualityComparator.RightSideParameter.ActualName = "Quality";
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| 160 | qualityComparator.ResultParameter.ActualName = "IsBetter";
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| 161 | qualityComparator.DampeningParameter.ActualName = "Temperature";
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| 162 |
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| 163 | improvesQualityBranch.ConditionParameter.ActualName = "IsBetter";
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| 164 |
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| 165 | moveMaker.Name = "Move maker (placeholder)";
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| 166 | moveMaker.OperatorParameter.ActualName = "MoveMaker";
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| 167 |
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| 168 | subScopesRemover.RemoveAllSubScopes = true;
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| 169 |
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| 170 | iterationsCounter.Name = "Increment Iterations";
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| 171 | iterationsCounter.Increment = new IntValue(1);
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| 172 | iterationsCounter.ValueParameter.ActualName = "Iterations";
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| 173 |
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| 174 | iterationsComparator.Name = "Iterations >= MaximumIterations";
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| 175 | iterationsComparator.LeftSideParameter.ActualName = "Iterations";
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| 176 | iterationsComparator.RightSideParameter.ActualName = "MaximumIterations";
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| 177 | iterationsComparator.ResultParameter.ActualName = "IterationsCondition";
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| 178 | iterationsComparator.Comparison.Value = ComparisonType.GreaterOrEqual;
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| 179 |
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| 180 | iterationsTermination.Name = "Iterations termination condition";
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| 181 | iterationsTermination.ConditionParameter.ActualName = "IterationsCondition";
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| 182 |
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| 183 | finished.Name = "Finished";
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[3093] | 184 | #endregion
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| 185 |
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| 186 | #region Create operator graph
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[3094] | 187 | OperatorGraph.InitialOperator = variableCreator;
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| 188 | variableCreator.Successor = initializeBestQuality;
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| 189 | initializeBestQuality.Successor = sssp;
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| 190 | sssp.Operators.Add(resultsCollector);
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| 191 | sssp.Successor = bestQualityMemorizer;
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| 192 | bestQualityMemorizer.Successor = annealingOperator;
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| 193 | annealingOperator.Successor = mainProcessor;
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[3101] | 194 | mainProcessor.Operator = valuesCollector;
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| 195 | mainProcessor.Successor = iterationsCounter;
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| 196 | valuesCollector.Successor = moveGenerator;
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[3094] | 197 | moveGenerator.Successor = moveEvaluationProcessor;
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[3101] | 198 | moveEvaluationProcessor.Operator = moveEvaluator;
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[3094] | 199 | moveEvaluationProcessor.Successor = subScopesRemover;
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| 200 | moveEvaluator.Successor = qualityComparator;
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| 201 | qualityComparator.Successor = improvesQualityBranch;
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| 202 | improvesQualityBranch.TrueBranch = moveMaker;
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| 203 | iterationsCounter.Successor = iterationsComparator;
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| 204 | iterationsComparator.Successor = iterationsTermination;
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| 205 | iterationsTermination.TrueBranch = finished;
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| 206 | iterationsTermination.FalseBranch = bestQualityMemorizer;
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[3093] | 207 | #endregion
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| 208 | }
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| 209 | }
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| 210 | }
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