[3348] | 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 System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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[3376] | 25 | using HeuristicLab.Common;
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[3348] | 26 | using HeuristicLab.Core;
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| 27 | using HeuristicLab.Data;
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| 28 | using HeuristicLab.Encodings.RealVectorEncoding;
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| 29 | using HeuristicLab.Optimization;
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| 30 | using HeuristicLab.Operators;
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| 31 | using HeuristicLab.Optimization.Operators;
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| 32 | using HeuristicLab.Parameters;
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| 33 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 34 | using HeuristicLab.PluginInfrastructure;
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[3368] | 35 | using HeuristicLab.Random;
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[3682] | 36 | using HeuristicLab.Analysis;
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[3348] | 37 |
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| 38 | namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
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| 39 | [Item("Particle Swarm Optimization", "A particle swarm optimization algorithm.")]
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| 40 | [Creatable("Algorithms")]
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| 41 | [StorableClass]
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| 42 | public sealed class ParticleSwarmOptimization : EngineAlgorithm {
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| 43 | #region Problem Properties
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| 44 | public override Type ProblemType {
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| 45 | get { return typeof(ISingleObjectiveProblem); }
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| 46 | }
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| 47 | public new ISingleObjectiveProblem Problem {
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| 48 | get { return (ISingleObjectiveProblem)base.Problem; }
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| 49 | set { base.Problem = value; }
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| 50 | }
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[3415] | 51 | public IRealVectorEncoder Encoder {
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| 52 | get { return EncoderParameter.Value; }
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| 53 | set { EncoderParameter.Value = value; }
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| 54 | }
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[3682] | 55 | public MultiAnalyzer Analyzer {
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| 56 | get { return AnalyzerParameter.Value; }
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| 57 | set { AnalyzerParameter.Value = value; }
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| 58 | }
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[3348] | 59 | #endregion
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| 60 |
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| 61 | #region Parameter Properties
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| 62 | private ValueParameter<IntValue> SeedParameter {
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| 63 | get { return (ValueParameter<IntValue>)Parameters["Seed"]; }
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| 64 | }
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| 65 | private ValueParameter<BoolValue> SetSeedRandomlyParameter {
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| 66 | get { return (ValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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| 67 | }
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| 68 | private ValueParameter<IntValue> SwarmSizeParameter {
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| 69 | get { return (ValueParameter<IntValue>)Parameters["SwarmSize"]; }
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| 70 | }
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| 71 | private ValueParameter<IntValue> MaxIterationsParameter {
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| 72 | get { return (ValueParameter<IntValue>)Parameters["MaxIterations"]; }
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| 73 | }
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| 74 | private OptionalConstrainedValueParameter<IRealVectorEncoder> EncoderParameter {
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| 75 | get { return (OptionalConstrainedValueParameter<IRealVectorEncoder>)Parameters["Encoder"]; }
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| 76 | }
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[3682] | 77 | private ValueParameter<MultiAnalyzer> AnalyzerParameter {
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| 78 | get { return (ValueParameter<MultiAnalyzer>)Parameters["Analyzer"]; }
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| 79 | }
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[3348] | 80 | #endregion
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| 81 |
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| 82 | #region Properties
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[3719] | 83 | [Storable]
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[3348] | 84 | private ParticleSwarmOptimizationMainLoop mainLoop; // Check this !
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| 85 | private ParticleSwarmOptimizationMainLoop MainLoop {
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| 86 | get { return mainLoop; }
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| 87 | }
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[3719] | 88 | [Storable]
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[3682] | 89 | private Assigner bestLocalQualityInitalizer; // Check this !
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| 90 | private Assigner BestLocalQualityInitalizer {
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| 91 | get { return bestLocalQualityInitalizer; }
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| 92 | }
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[3719] | 93 | [Storable]
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[3682] | 94 | private BestAverageWorstQualityAnalyzer qualityAnalyzer;
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[3348] | 95 | #endregion
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| 96 |
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| 97 | public ParticleSwarmOptimization()
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| 98 | : base() {
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| 99 | Parameters.Add(new ValueParameter<IntValue>("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
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| 100 | Parameters.Add(new ValueParameter<BoolValue>("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
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[3724] | 101 | Parameters.Add(new ValueParameter<IntValue>("SwarmSize", "Size of the particle swarm.", new IntValue(10)));
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[3348] | 102 | Parameters.Add(new ValueParameter<IntValue>("MaxIterations", "Maximal number of iterations.", new IntValue(1000)));
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[3682] | 103 | Parameters.Add(new ConstrainedValueParameter<IRealVectorEncoder>("Encoder", "The operator used to encode solutions as position vector."));
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| 104 | Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze each generation.", new MultiAnalyzer()));
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[3348] | 105 | RandomCreator randomCreator = new RandomCreator();
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| 106 | SolutionsCreator solutionsCreator = new SolutionsCreator();
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[3415] | 107 | UniformSubScopesProcessor uniformSubScopesProcessor = new UniformSubScopesProcessor();
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[3682] | 108 | UniformSubScopesProcessor uniformSubScopesProcessor2 = new UniformSubScopesProcessor();
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[3415] | 109 | VariableCreator variableCreator = new VariableCreator();
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[3682] | 110 | VariableCreator localVariableCreator = new VariableCreator();
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| 111 | Placeholder encoder = new Placeholder();
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| 112 | UniformRandomRealVectorCreator velocityVectorCreator = new UniformRandomRealVectorCreator();
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| 113 | bestLocalQualityInitalizer = new Assigner();
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| 114 | Assigner bestLocalPositionInitalizer = new Assigner();
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| 115 | Assigner bestGlobalPositionInitalizer = new Assigner();
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| 116 | mainLoop = new ParticleSwarmOptimizationMainLoop();
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| 117 | BestAverageWorstQualityCalculator bawCalculator = new BestAverageWorstQualityCalculator();
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| 118 | Comparator comparator = new Comparator();
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| 119 | ConditionalBranch branch = new ConditionalBranch();
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[3348] | 120 |
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[3682] | 121 | variableCreator.CollectedValues.Add(new ValueParameter<RealVector>("CurrentBestPosition", new RealVector()));
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| 122 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleMatrix>("ZeroBounds", new DoubleMatrix(new double[,] { { 0, 0 } })));
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| 123 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Length", new IntValue(2)));
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| 124 |
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| 125 | localVariableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("BestQuality", new DoubleValue(0)));
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| 126 | localVariableCreator.CollectedValues.Add(new ValueParameter<RealVector>("BestPosition", new RealVector()));
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| 127 |
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[3348] | 128 | randomCreator.RandomParameter.ActualName = "Random";
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| 129 | randomCreator.SeedParameter.ActualName = SeedParameter.Name;
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| 130 | randomCreator.SeedParameter.Value = null;
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| 131 | randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
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| 132 | randomCreator.SetSeedRandomlyParameter.Value = null;
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[3682] | 133 |
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[3348] | 134 | solutionsCreator.NumberOfSolutionsParameter.ActualName = SwarmSizeParameter.Name;
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[3415] | 135 |
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[3682] | 136 | encoder.OperatorParameter.ActualName = "Encoder";
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| 137 |
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| 138 | velocityVectorCreator.BoundsParameter.ActualName = "ZeroBounds";
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| 139 | velocityVectorCreator.RealVectorParameter.ActualName = "Velocity";
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[3348] | 140 |
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[3682] | 141 | bestLocalQualityInitalizer.LeftSideParameter.ActualName = "BestQuality"; // cloned value
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| 142 | bestLocalQualityInitalizer.RightSideParameter.ActualName = "Quality"; // FIXME!!! Should be mapped
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[3348] | 143 |
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[3682] | 144 | bestLocalPositionInitalizer.LeftSideParameter.ActualName = "BestPosition";
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| 145 | bestLocalPositionInitalizer.RightSideParameter.ActualName = "Position"; // FixMe
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| 146 |
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| 147 | bestGlobalPositionInitalizer.LeftSideParameter.ActualName = "CurrentBestPosition";
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| 148 | bestGlobalPositionInitalizer.RightSideParameter.ActualName = "BestPosition";
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| 149 |
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| 150 | bawCalculator.AverageQualityParameter.ActualName = "CurrentAverageBestQuality";
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| 151 | bawCalculator.BestQualityParameter.ActualName = "CurrentBestBestQuality";
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| 152 | bawCalculator.MaximizationParameter.ActualName = "Maximization"; // FIXME
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| 153 | bawCalculator.QualityParameter.ActualName = "Quality";
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| 154 | bawCalculator.WorstQualityParameter.ActualName = "CurrentWorstBestQuality";
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| 155 |
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| 156 | comparator.Comparison = new Comparison(ComparisonType.Equal);
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| 157 | comparator.LeftSideParameter.ActualName = "Quality";
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| 158 | comparator.ResultParameter.ActualName = "NewGlobalBest";
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| 159 | comparator.RightSideParameter.ActualName = "CurrentBestBestQuality";
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| 160 |
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| 161 | branch.ConditionParameter.ActualName = "NewGlobalBest";
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| 162 | branch.TrueBranch = bestGlobalPositionInitalizer; // copy position vector
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| 163 |
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| 164 | mainLoop.MaximumGenerationsParameter.ActualName = MaxIterationsParameter.Name;
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| 165 | mainLoop.ResultsParameter.ActualName = "Results";
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| 166 | mainLoop.AnalyzerParameter.ActualName = AnalyzerParameter.Name;
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| 167 |
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| 168 | OperatorGraph.InitialOperator = randomCreator;
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| 169 | randomCreator.Successor = solutionsCreator;
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| 170 | solutionsCreator.Successor = variableCreator;
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| 171 | variableCreator.Successor = uniformSubScopesProcessor;
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| 172 | uniformSubScopesProcessor.Operator = encoder;
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| 173 | encoder.Successor = velocityVectorCreator;
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| 174 | velocityVectorCreator.Successor = localVariableCreator;
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| 175 | localVariableCreator.Successor = bestLocalQualityInitalizer;
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| 176 | bestLocalQualityInitalizer.Successor = bestLocalPositionInitalizer;
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| 177 | uniformSubScopesProcessor.Successor = bawCalculator; // mainLoop;
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| 178 | bawCalculator.Successor = uniformSubScopesProcessor2;
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| 179 | uniformSubScopesProcessor2.Operator = comparator;
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| 180 | comparator.Successor = branch;
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| 181 | uniformSubScopesProcessor2.Successor = mainLoop;
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[3719] | 182 | InitializeAnalyzers();
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| 183 | UpdateAnalyzers();
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[3348] | 184 | Initialize();
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| 185 | }
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| 186 |
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[3415] | 187 | [StorableHook(HookType.AfterDeserialization)]
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[3348] | 188 | private void Initialize() {
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[3415] | 189 | EncoderParameter.ValueChanged += new EventHandler(EncoderParameter_ValueChanged);
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[3682] | 190 | if (Problem != null) {
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| 191 | bestLocalQualityInitalizer.RightSideParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 192 | }
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[3348] | 193 | }
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| 194 |
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| 195 | [StorableConstructor]
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| 196 | private ParticleSwarmOptimization(bool deserializing) : base(deserializing) { }
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| 197 |
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| 198 | public override IDeepCloneable Clone(Cloner cloner) {
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| 199 | ParticleSwarmOptimization clone = (ParticleSwarmOptimization)base.Clone(cloner);
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| 200 | clone.Initialize();
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| 201 | return clone;
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| 202 | }
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| 203 |
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| 204 | public override void Prepare() {
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| 205 | if (Problem != null) base.Prepare();
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| 206 | }
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| 207 |
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| 208 | #region Events
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| 209 | protected override void OnProblemChanged() {
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| 210 | UpdateEncoders();
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[3682] | 211 | UpdateAnalyzers();
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[3719] | 212 | ParameterizeAnalyzers();
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[3682] | 213 | bestLocalQualityInitalizer.RightSideParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 214 | Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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| 215 | MainLoop.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
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[3348] | 216 | base.OnProblemChanged();
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| 217 | }
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[3415] | 218 |
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| 219 | private void EncoderParameter_ValueChanged(object sender, EventArgs e) {
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[3719] | 220 | //MainLoop.EncoderParameter.ActualValue = (IRealVectorEncoder) EncoderParameter.ActualValue;
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[3682] | 221 | //((UniformSubScopesProcessor)((VariableCreator)((SolutionsCreator)((RandomCreator)OperatorGraph.InitialOperator).Successor).Successor).Successor).Operator = EncoderParameter.Value;
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| 222 | //((SingleSuccessorOperator)EncoderParameter.Value).Successor = ((SingleSuccessorOperator)old).Successor;
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[3415] | 223 | }
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[3348] | 224 | #endregion
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| 225 |
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| 226 | #region Helpers
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[3682] | 227 | private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
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| 228 | //
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| 229 | //
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| 230 | }
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[3348] | 231 |
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| 232 | private void UpdateEncoders() {
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| 233 | IRealVectorEncoder oldEncoder = EncoderParameter.Value;
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| 234 | EncoderParameter.ValidValues.Clear();
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[3682] | 235 | List<IRealVectorEncoder> encoders = Problem.Operators.OfType<IRealVectorEncoder>().OrderBy(x => x.Name).ToList<IRealVectorEncoder>();
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| 236 | if (encoders.Count > 0) { // ToDo: Add wiring; else: use Position Vector directly --> name matching
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| 237 | foreach (IRealVectorEncoder encoder in Problem.Operators.OfType<IRealVectorEncoder>().OrderBy(x => x.Name)) {
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| 238 | EncoderParameter.ValidValues.Add(encoder);
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| 239 | ((ILookupParameter)encoder.RealVectorParameter).ActualName = "Position";
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| 240 | }
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| 241 | if (oldEncoder != null) {
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| 242 | IRealVectorEncoder encoder = EncoderParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldEncoder.GetType());
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| 243 | if (encoder != null) EncoderParameter.Value = encoder;
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| 244 | }
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[3348] | 245 | }
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[3682] | 246 | }
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| 247 |
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| 248 | private void InitializeAnalyzers() {
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| 249 | qualityAnalyzer = new BestAverageWorstQualityAnalyzer();
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| 250 | ParameterizeAnalyzers();
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| 251 | }
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| 252 |
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| 253 | private void ParameterizeAnalyzers() {
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| 254 | qualityAnalyzer.ResultsParameter.ActualName = "Results";
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| 255 | if (Problem != null) {
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| 256 | qualityAnalyzer.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
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| 257 | qualityAnalyzer.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 258 | qualityAnalyzer.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
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[3348] | 259 | }
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| 260 | }
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[3415] | 261 |
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[3682] | 262 | private void UpdateAnalyzers() {
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| 263 | Analyzer.Operators.Clear();
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| 264 | if (Problem != null) {
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[3816] | 265 | foreach (IAnalyzer analyzer in Problem.Operators.OfType<IAnalyzer>())
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[3682] | 266 | Analyzer.Operators.Add(analyzer);
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| 267 | }
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[3799] | 268 | Analyzer.Operators.Add(qualityAnalyzer);
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[3682] | 269 | }
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| 270 |
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[3348] | 271 | #endregion
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| 272 | }
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| 273 | }
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