| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 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.Common;
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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;
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| 27 | using HeuristicLab.Optimization.Operators;
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| 28 | using HeuristicLab.Parameters;
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| 29 | using HEAL.Attic;
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| 30 |
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| 31 | namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
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| 32 | [Item("ParticleSwarmOptimizationMainLoop", "An operator which represents the main loop of a particle swarm optimization algorithm.")]
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| 33 | [StorableType("C9824DCA-F791-4540-8EC8-F27C8FBC6BF5")]
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| 34 | public class ParticleSwarmOptimizationMainLoop : AlgorithmOperator {
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| 35 |
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| 36 | #region Parameter Properties
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| 37 | public IValueLookupParameter<IRandom> RandomParameter {
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| 38 | get { return (IValueLookupParameter<IRandom>)Parameters["Random"]; }
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| 39 | }
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| 40 | public IValueLookupParameter<IntValue> SwarmSizeParameter {
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| 41 | get { return (IValueLookupParameter<IntValue>)Parameters["SwarmSize"]; }
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| 42 | }
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| 43 | public IValueLookupParameter<IntValue> MaxIterationsParameter {
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| 44 | get { return (IValueLookupParameter<IntValue>)Parameters["MaxIterations"]; }
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| 45 | }
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| 46 | public IValueLookupParameter<IOperator> AnalyzerParameter {
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| 47 | get { return (IValueLookupParameter<IOperator>)Parameters["Analyzer"]; }
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| 48 | }
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| 49 | public IValueLookupParameter<DoubleValue> InertiaParameter {
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| 50 | get { return (IValueLookupParameter<DoubleValue>)Parameters["CurrentInertia"]; }
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| 51 | }
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| 52 | public IValueLookupParameter<DoubleValue> PersonalBestAttractionParameter {
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| 53 | get { return (IValueLookupParameter<DoubleValue>)Parameters["PersonalBestAttraction"]; }
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| 54 | }
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| 55 | public IValueLookupParameter<DoubleValue> NeighborBestAttractionParameter {
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| 56 | get { return (IValueLookupParameter<DoubleValue>)Parameters["NeighborBestAttraction"]; }
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| 57 | }
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| 58 | public IValueLookupParameter<IOperator> ParticleUpdaterParameter {
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| 59 | get { return (IValueLookupParameter<IOperator>)Parameters["ParticleUpdater"]; }
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| 60 | }
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| 61 | public IValueLookupParameter<IOperator> TopologyUpdaterParameter {
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| 62 | get { return (IValueLookupParameter<IOperator>)Parameters["TopologyUpdater"]; }
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| 63 | }
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| 64 | public IValueLookupParameter<IOperator> InertiaUpdaterParameter {
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| 65 | get { return (IValueLookupParameter<IOperator>)Parameters["InertiaUpdater"]; }
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| 66 | }
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| 67 | public IValueLookupParameter<ResultCollection> ResultsParameter {
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| 68 | get { return (IValueLookupParameter<ResultCollection>)Parameters["Results"]; }
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| 69 | }
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| 70 | public LookupParameter<IntValue> EvaluatedSolutionsParameter {
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| 71 | get { return (LookupParameter<IntValue>)Parameters["EvaluatedSolutions"]; }
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| 72 | }
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| 73 | public IValueLookupParameter<IOperator> EvaluatorParameter {
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| 74 | get { return (IValueLookupParameter<IOperator>)Parameters["Evaluator"]; }
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| 75 | }
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| 76 | public ValueLookupParameter<ISwarmUpdater> SwarmUpdaterParameter {
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| 77 | get { return (ValueLookupParameter<ISwarmUpdater>)Parameters["SwarmUpdater"]; }
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| 78 | }
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| 79 | #endregion
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| 80 |
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| 81 | public ParticleSwarmOptimizationMainLoop()
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| 82 | : base() {
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| 83 | Initialize();
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| 84 | }
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| 85 |
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| 86 | [StorableConstructor]
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| 87 | protected ParticleSwarmOptimizationMainLoop(StorableConstructorFlag _) : base(_) { }
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| 88 | protected ParticleSwarmOptimizationMainLoop(ParticleSwarmOptimizationMainLoop original, Cloner cloner)
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| 89 | : base(original, cloner) {
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| 90 | }
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| 91 |
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| 92 | public override IDeepCloneable Clone(Cloner cloner) {
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| 93 | return new ParticleSwarmOptimizationMainLoop(this, cloner);
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| 94 | }
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| 95 |
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| 96 | private void Initialize() {
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| 97 | #region Create parameters
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| 98 | Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
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| 99 | Parameters.Add(new ValueLookupParameter<IntValue>("SwarmSize", "Size of the particle swarm."));
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| 100 | Parameters.Add(new ValueLookupParameter<IntValue>("MaxIterations", "Maximal number of iterations."));
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| 101 |
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| 102 | Parameters.Add(new ValueLookupParameter<IOperator>("Analyzer", "The operator used to analyze each generation."));
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| 103 |
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| 104 | Parameters.Add(new ValueLookupParameter<DoubleValue>("CurrentInertia", "Inertia weight on a particle's movement (omega)."));
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| 105 | Parameters.Add(new ValueLookupParameter<DoubleValue>("PersonalBestAttraction", "Weight for particle's pull towards its personal best soution (phi_p)."));
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| 106 | Parameters.Add(new ValueLookupParameter<DoubleValue>("NeighborBestAttraction", "Weight for pull towards the neighborhood best solution or global best solution in case of a totally connected topology (phi_g)."));
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| 107 |
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| 108 | Parameters.Add(new ValueLookupParameter<IOperator>("ParticleUpdater", "Operator that calculates new position and velocity of a particle"));
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| 109 | Parameters.Add(new ValueLookupParameter<IOperator>("TopologyUpdater", "Updates the neighborhood description vectors"));
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| 110 | Parameters.Add(new ValueLookupParameter<IOperator>("InertiaUpdater", "Updates the omega parameter"));
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| 111 | Parameters.Add(new ValueLookupParameter<IOperator>("Evaluator", "Evaluates a particle solution."));
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| 112 |
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| 113 | Parameters.Add(new ValueLookupParameter<ResultCollection>("Results", "The variable collection where results should be stored."));
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| 114 | Parameters.Add(new LookupParameter<IntValue>("EvaluatedSolutions", "The number of times solutions have been evaluated."));
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| 115 |
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| 116 | Parameters.Add(new ValueLookupParameter<ISwarmUpdater>("SwarmUpdater", "The encoding-specific swarm updater."));
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| 117 | #endregion
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| 118 |
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| 119 | #region Create operators
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| 120 | ResultsCollector resultsCollector = new ResultsCollector();
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| 121 | Placeholder swarmUpdaterPlaceholer1 = new Placeholder();
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| 122 | Placeholder evaluatorPlaceholder = new Placeholder();
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| 123 | Placeholder analyzerPlaceholder = new Placeholder();
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| 124 | Placeholder analyzer2Placeholder = new Placeholder();
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| 125 | UniformSubScopesProcessor uniformSubScopeProcessor = new UniformSubScopesProcessor();
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| 126 | Placeholder particleUpdaterPlaceholder = new Placeholder();
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| 127 | Placeholder topologyUpdaterPlaceholder = new Placeholder();
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| 128 | UniformSubScopesProcessor evaluationProcessor = new UniformSubScopesProcessor();
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| 129 | Placeholder swarmUpdater = new Placeholder();
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| 130 | IntCounter iterationsCounter = new IntCounter();
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| 131 | Comparator iterationsComparator = new Comparator();
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| 132 | ConditionalBranch conditionalBranch = new ConditionalBranch();
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| 133 | Placeholder inertiaUpdaterPlaceholder = new Placeholder();
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| 134 | SubScopesCounter subScopesCounter = new SubScopesCounter();
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| 135 | #endregion
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| 136 |
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| 137 | #region Create operator graph
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| 138 | OperatorGraph.InitialOperator = resultsCollector;
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| 139 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
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| 140 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("CurrentInertia"));
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| 141 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Evaluated Solutions", null, "EvaluatedSolutions"));
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| 142 | resultsCollector.ResultsParameter.ActualName = "Results";
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| 143 | resultsCollector.Successor = swarmUpdaterPlaceholer1;
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| 144 |
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| 145 | swarmUpdaterPlaceholer1.Name = "(Swarm Updater)";
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| 146 | swarmUpdaterPlaceholer1.OperatorParameter.ActualName = SwarmUpdaterParameter.ActualName;
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| 147 | swarmUpdaterPlaceholer1.Successor = analyzerPlaceholder;
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| 148 |
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| 149 | analyzerPlaceholder.Name = "(Analyzer)";
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| 150 | analyzerPlaceholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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| 151 | analyzerPlaceholder.Successor = uniformSubScopeProcessor;
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| 152 |
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| 153 | uniformSubScopeProcessor.Operator = particleUpdaterPlaceholder;
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| 154 | uniformSubScopeProcessor.Successor = evaluationProcessor;
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| 155 |
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| 156 | particleUpdaterPlaceholder.Name = "(ParticleUpdater)";
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| 157 | particleUpdaterPlaceholder.OperatorParameter.ActualName = ParticleUpdaterParameter.Name;
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| 158 |
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| 159 | evaluationProcessor.Parallel = new BoolValue(true);
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| 160 | evaluationProcessor.Operator = evaluatorPlaceholder;
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| 161 | evaluationProcessor.Successor = subScopesCounter;
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| 162 |
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| 163 | evaluatorPlaceholder.Name = "(Evaluator)";
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| 164 | evaluatorPlaceholder.OperatorParameter.ActualName = EvaluatorParameter.Name;
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| 165 |
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| 166 | subScopesCounter.Name = "Increment EvaluatedSolutions";
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| 167 | subScopesCounter.ValueParameter.ActualName = EvaluatedSolutionsParameter.Name;
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| 168 | subScopesCounter.Successor = topologyUpdaterPlaceholder;
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| 169 |
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| 170 | topologyUpdaterPlaceholder.Name = "(TopologyUpdater)";
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| 171 | topologyUpdaterPlaceholder.OperatorParameter.ActualName = TopologyUpdaterParameter.Name;
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| 172 | topologyUpdaterPlaceholder.Successor = swarmUpdater;
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| 173 |
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| 174 | swarmUpdater.Name = "(Swarm Updater)";
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| 175 | swarmUpdater.OperatorParameter.ActualName = SwarmUpdaterParameter.ActualName;
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| 176 | swarmUpdater.Successor = inertiaUpdaterPlaceholder;
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| 177 |
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| 178 | inertiaUpdaterPlaceholder.Name = "(Inertia Updater)";
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| 179 | inertiaUpdaterPlaceholder.OperatorParameter.ActualName = InertiaUpdaterParameter.ActualName;
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| 180 | inertiaUpdaterPlaceholder.Successor = iterationsCounter;
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| 181 |
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| 182 | iterationsCounter.Name = "Iterations++";
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| 183 | iterationsCounter.ValueParameter.ActualName = "Iterations";
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| 184 | iterationsCounter.Successor = iterationsComparator;
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| 185 |
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| 186 | iterationsComparator.LeftSideParameter.ActualName = "Iterations";
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| 187 | iterationsComparator.Comparison = new Comparison(ComparisonType.Less);
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| 188 | iterationsComparator.RightSideParameter.ActualName = "MaxIterations";
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| 189 | iterationsComparator.ResultParameter.ActualName = "ContinueIteration";
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| 190 | iterationsComparator.Successor = conditionalBranch;
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| 191 |
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| 192 | conditionalBranch.Name = "ContinueIteration?";
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| 193 | conditionalBranch.ConditionParameter.ActualName = "ContinueIteration";
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| 194 | conditionalBranch.TrueBranch = analyzerPlaceholder;
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| 195 | conditionalBranch.FalseBranch = analyzer2Placeholder;
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| 196 |
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| 197 | analyzer2Placeholder.Name = "(Analyzer)";
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| 198 | analyzer2Placeholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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| 199 | #endregion
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| 200 | }
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| 201 |
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| 202 | public override IOperation Apply() {
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| 203 | if (this.ParticleUpdaterParameter.ActualValue == null)
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| 204 | return null;
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| 205 | return base.Apply();
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| 206 | }
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| 207 | }
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| 208 | }
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