1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2018 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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25 | using HeuristicLab.Analysis;
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26 | using HeuristicLab.Common;
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27 | using HeuristicLab.Core;
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28 | using HeuristicLab.Data;
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29 | using HeuristicLab.Operators;
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30 | using HeuristicLab.Optimization;
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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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35 | using HeuristicLab.Random;
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36 |
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37 | namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
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38 | [Item("Particle Swarm Optimization (PSO)", "A particle swarm optimization algorithm based on Standard PSO (SPSO) as described in Clerc, M. (2012). Standard particle swarm optimisation.")]
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39 | [Creatable(CreatableAttribute.Categories.PopulationBasedAlgorithms, Priority = 300)]
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40 | [StorableClass]
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41 | public sealed class ParticleSwarmOptimization : HeuristicOptimizationEngineAlgorithm, IStorableContent {
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42 | #region Parameter Properties
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43 | public IValueParameter<IntValue> SeedParameter {
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44 | get { return (IValueParameter<IntValue>)Parameters["Seed"]; }
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45 | }
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46 | public IValueParameter<BoolValue> SetSeedRandomlyParameter {
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47 | get { return (IValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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48 | }
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49 | public IValueParameter<IntValue> SwarmSizeParameter {
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50 | get { return (IValueParameter<IntValue>)Parameters["SwarmSize"]; }
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51 | }
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52 | public IValueParameter<IntValue> MaxIterationsParameter {
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53 | get { return (IValueParameter<IntValue>)Parameters["MaxIterations"]; }
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54 | }
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55 | public IValueParameter<DoubleValue> InertiaParameter {
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56 | get { return (IValueParameter<DoubleValue>)Parameters["Inertia"]; }
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57 | }
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58 | public IValueParameter<DoubleValue> PersonalBestAttractionParameter {
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59 | get { return (IValueParameter<DoubleValue>)Parameters["PersonalBestAttraction"]; }
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60 | }
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61 | public IValueParameter<DoubleValue> NeighborBestAttractionParameter {
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62 | get { return (IValueParameter<DoubleValue>)Parameters["NeighborBestAttraction"]; }
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63 | }
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64 | public IValueParameter<MultiAnalyzer> AnalyzerParameter {
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65 | get { return (IValueParameter<MultiAnalyzer>)Parameters["Analyzer"]; }
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66 | }
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67 | public IConstrainedValueParameter<IParticleCreator> ParticleCreatorParameter {
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68 | get { return (IConstrainedValueParameter<IParticleCreator>)Parameters["ParticleCreator"]; }
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69 | }
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70 | public IConstrainedValueParameter<IParticleUpdater> ParticleUpdaterParameter {
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71 | get { return (IConstrainedValueParameter<IParticleUpdater>)Parameters["ParticleUpdater"]; }
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72 | }
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73 | public IConstrainedValueParameter<ITopologyInitializer> TopologyInitializerParameter {
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74 | get { return (IConstrainedValueParameter<ITopologyInitializer>)Parameters["TopologyInitializer"]; }
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75 | }
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76 | public IConstrainedValueParameter<ITopologyUpdater> TopologyUpdaterParameter {
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77 | get { return (IConstrainedValueParameter<ITopologyUpdater>)Parameters["TopologyUpdater"]; }
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78 | }
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79 | public IConstrainedValueParameter<IDiscreteDoubleValueModifier> InertiaUpdaterParameter {
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80 | get { return (IConstrainedValueParameter<IDiscreteDoubleValueModifier>)Parameters["InertiaUpdater"]; }
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81 | }
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82 | public IConstrainedValueParameter<ISwarmUpdater> SwarmUpdaterParameter {
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83 | get { return (IConstrainedValueParameter<ISwarmUpdater>)Parameters["SwarmUpdater"]; }
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84 |
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85 | }
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86 | #endregion
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87 |
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88 | #region Properties
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89 |
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90 | public string Filename { get; set; }
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91 |
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92 | [Storable]
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93 | private BestAverageWorstQualityAnalyzer qualityAnalyzer;
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94 |
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95 | [Storable]
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96 | private SolutionsCreator solutionsCreator;
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97 |
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98 | [Storable]
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99 | private ParticleSwarmOptimizationMainLoop mainLoop;
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100 |
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101 | public override Type ProblemType {
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102 | get { return typeof(ISingleObjectiveHeuristicOptimizationProblem); }
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103 | }
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104 | public new ISingleObjectiveHeuristicOptimizationProblem Problem {
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105 | get { return (ISingleObjectiveHeuristicOptimizationProblem)base.Problem; }
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106 | set { base.Problem = value; }
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107 | }
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108 | public IntValue Seed {
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109 | get { return SeedParameter.Value; }
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110 | set { SeedParameter.Value = value; }
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111 | }
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112 | public BoolValue SetSeedRandomly {
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113 | get { return SetSeedRandomlyParameter.Value; }
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114 | set { SetSeedRandomlyParameter.Value = value; }
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115 | }
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116 | public IntValue SwarmSize {
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117 | get { return SwarmSizeParameter.Value; }
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118 | set { SwarmSizeParameter.Value = value; }
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119 | }
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120 | public IntValue MaxIterations {
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121 | get { return MaxIterationsParameter.Value; }
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122 | set { MaxIterationsParameter.Value = value; }
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123 | }
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124 | public DoubleValue Inertia {
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125 | get { return InertiaParameter.Value; }
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126 | set { InertiaParameter.Value = value; }
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127 | }
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128 | public DoubleValue PersonalBestAttraction {
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129 | get { return PersonalBestAttractionParameter.Value; }
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130 | set { PersonalBestAttractionParameter.Value = value; }
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131 | }
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132 | public DoubleValue NeighborBestAttraction {
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133 | get { return NeighborBestAttractionParameter.Value; }
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134 | set { NeighborBestAttractionParameter.Value = value; }
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135 | }
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136 | public MultiAnalyzer Analyzer {
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137 | get { return AnalyzerParameter.Value; }
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138 | set { AnalyzerParameter.Value = value; }
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139 | }
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140 | public IParticleCreator ParticleCreator {
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141 | get { return ParticleCreatorParameter.Value; }
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142 | set { ParticleCreatorParameter.Value = value; }
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143 | }
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144 | public IParticleUpdater ParticleUpdater {
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145 | get { return ParticleUpdaterParameter.Value; }
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146 | set { ParticleUpdaterParameter.Value = value; }
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147 | }
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148 | public ITopologyInitializer TopologyInitializer {
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149 | get { return TopologyInitializerParameter.Value; }
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150 | set { TopologyInitializerParameter.Value = value; }
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151 | }
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152 | public ITopologyUpdater TopologyUpdater {
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153 | get { return TopologyUpdaterParameter.Value; }
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154 | set { TopologyUpdaterParameter.Value = value; }
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155 | }
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156 | public IDiscreteDoubleValueModifier InertiaUpdater {
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157 | get { return InertiaUpdaterParameter.Value; }
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158 | set { InertiaUpdaterParameter.Value = value; }
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159 | }
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160 | public ISwarmUpdater SwarmUpdater {
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161 | get { return SwarmUpdaterParameter.Value; }
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162 | set { SwarmUpdaterParameter.Value = value; }
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163 | }
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164 | #endregion
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165 |
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166 | [StorableConstructor]
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167 | private ParticleSwarmOptimization(bool deserializing) : base(deserializing) { }
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168 | private ParticleSwarmOptimization(ParticleSwarmOptimization original, Cloner cloner)
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169 | : base(original, cloner) {
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170 | qualityAnalyzer = cloner.Clone(original.qualityAnalyzer);
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171 | solutionsCreator = cloner.Clone(original.solutionsCreator);
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172 | mainLoop = cloner.Clone(original.mainLoop);
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173 | Initialize();
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174 | }
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175 | public ParticleSwarmOptimization()
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176 | : base() {
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177 | 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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178 | 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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179 | Parameters.Add(new ValueParameter<IntValue>("SwarmSize", "Size of the particle swarm.", new IntValue(40)));
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180 | Parameters.Add(new ValueParameter<IntValue>("MaxIterations", "Maximal number of iterations.", new IntValue(1000)));
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181 | Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze each generation.", new MultiAnalyzer()));
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182 | Parameters.Add(new ValueParameter<DoubleValue>("Inertia", "Inertia weight on a particle's movement (omega).", new DoubleValue(0.721)));
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183 | Parameters.Add(new ValueParameter<DoubleValue>("PersonalBestAttraction", "Weight for particle's pull towards its personal best soution (phi_p).", new DoubleValue(1.193)));
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184 | Parameters.Add(new ValueParameter<DoubleValue>("NeighborBestAttraction", "Weight for pull towards the neighborhood best solution or global best solution in case of a totally connected topology (phi_g).", new DoubleValue(1.193)));
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185 | Parameters.Add(new ConstrainedValueParameter<IParticleCreator>("ParticleCreator", "Operator that creates a new particle."));
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186 | Parameters.Add(new ConstrainedValueParameter<IParticleUpdater>("ParticleUpdater", "Operator that updates a particle."));
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187 | Parameters.Add(new OptionalConstrainedValueParameter<ITopologyInitializer>("TopologyInitializer", "Creates neighborhood description vectors."));
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188 | Parameters.Add(new OptionalConstrainedValueParameter<ITopologyUpdater>("TopologyUpdater", "Updates the neighborhood description vectors."));
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189 | Parameters.Add(new OptionalConstrainedValueParameter<IDiscreteDoubleValueModifier>("InertiaUpdater", "Updates the omega parameter."));
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190 | Parameters.Add(new ConstrainedValueParameter<ISwarmUpdater>("SwarmUpdater", "Encoding-specific parameter which is provided by the problem. May provide additional encoding-specific parameters, such as velocity bounds for real valued problems"));
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191 |
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192 | RandomCreator randomCreator = new RandomCreator();
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193 | VariableCreator variableCreator = new VariableCreator();
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194 | Assigner currentInertiaAssigner = new Assigner();
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195 | solutionsCreator = new SolutionsCreator();
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196 | SubScopesCounter subScopesCounter = new SubScopesCounter();
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197 | Placeholder topologyInitializerPlaceholder = new Placeholder();
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198 | mainLoop = new ParticleSwarmOptimizationMainLoop();
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199 |
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200 | OperatorGraph.InitialOperator = randomCreator;
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201 |
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202 | randomCreator.SetSeedRandomlyParameter.Value = null;
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203 | randomCreator.SeedParameter.Value = null;
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204 | randomCreator.Successor = variableCreator;
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205 |
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206 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Iterations", new IntValue(0)));
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207 | variableCreator.Successor = currentInertiaAssigner;
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208 |
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209 | currentInertiaAssigner.Name = "CurrentInertia := Inertia";
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210 | currentInertiaAssigner.LeftSideParameter.ActualName = "CurrentInertia";
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211 | currentInertiaAssigner.RightSideParameter.ActualName = "Inertia";
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212 | currentInertiaAssigner.Successor = solutionsCreator;
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213 |
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214 | solutionsCreator.NumberOfSolutionsParameter.ActualName = "SwarmSize";
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215 | ParameterizeSolutionsCreator();
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216 | solutionsCreator.Successor = subScopesCounter;
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217 |
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218 | subScopesCounter.Name = "Initialize EvaluatedSolutions";
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219 | subScopesCounter.ValueParameter.ActualName = "EvaluatedSolutions";
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220 | subScopesCounter.Successor = topologyInitializerPlaceholder;
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221 |
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222 | topologyInitializerPlaceholder.Name = "(TopologyInitializer)";
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223 | topologyInitializerPlaceholder.OperatorParameter.ActualName = "TopologyInitializer";
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224 | topologyInitializerPlaceholder.Successor = mainLoop;
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225 |
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226 | mainLoop.AnalyzerParameter.ActualName = AnalyzerParameter.Name;
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227 | mainLoop.InertiaParameter.ActualName = "CurrentInertia";
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228 | mainLoop.MaxIterationsParameter.ActualName = MaxIterationsParameter.Name;
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229 | mainLoop.NeighborBestAttractionParameter.ActualName = NeighborBestAttractionParameter.Name;
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230 | mainLoop.InertiaUpdaterParameter.ActualName = InertiaUpdaterParameter.Name;
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231 | mainLoop.ParticleUpdaterParameter.ActualName = ParticleUpdaterParameter.Name;
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232 | mainLoop.PersonalBestAttractionParameter.ActualName = PersonalBestAttractionParameter.Name;
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233 | mainLoop.RandomParameter.ActualName = randomCreator.RandomParameter.ActualName;
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234 | mainLoop.SwarmSizeParameter.ActualName = SwarmSizeParameter.Name;
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235 | mainLoop.TopologyUpdaterParameter.ActualName = TopologyUpdaterParameter.Name;
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236 | mainLoop.RandomParameter.ActualName = randomCreator.RandomParameter.ActualName;
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237 | mainLoop.ResultsParameter.ActualName = "Results";
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238 |
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239 | InitializeAnalyzers();
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240 | InitializeParticleCreator();
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241 | InitializeSwarmUpdater();
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242 | ParameterizeSolutionsCreator();
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243 | UpdateAnalyzers();
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244 | UpdateInertiaUpdater();
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245 | InitInertiaUpdater();
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246 | UpdateTopologyInitializer();
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247 | Initialize();
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248 | ParameterizeMainLoop();
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249 | }
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250 |
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251 | public override IDeepCloneable Clone(Cloner cloner) {
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252 | return new ParticleSwarmOptimization(this, cloner);
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253 | }
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254 |
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255 | [StorableHook(HookType.AfterDeserialization)]
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256 | private void AfterDeserialization() {
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257 | Initialize();
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258 | }
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259 |
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260 | #region Events
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261 | protected override void OnProblemChanged() {
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262 | UpdateAnalyzers();
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263 | ParameterizeAnalyzers();
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264 | UpdateParticleUpdaterParameter();
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265 | UpdateTopologyParameters();
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266 | InitializeParticleCreator();
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267 | InitializeSwarmUpdater();
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268 | ParameterizeSolutionsCreator();
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269 | base.OnProblemChanged();
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270 | }
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271 |
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272 | void TopologyInitializerParameter_ValueChanged(object sender, EventArgs e) {
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273 | this.UpdateTopologyParameters();
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274 | }
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275 | #endregion
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276 |
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277 | #region Helpers
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278 | private void Initialize() {
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279 | TopologyInitializerParameter.ValueChanged += new EventHandler(TopologyInitializerParameter_ValueChanged);
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280 | }
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281 |
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282 | private void InitializeParticleCreator() {
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283 | ParticleCreatorParameter.ValidValues.Clear();
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284 | if (Problem != null) {
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285 | IParticleCreator oldParticleCreator = ParticleCreator;
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286 | IParticleCreator defaultParticleCreator = Problem.Operators.OfType<IParticleCreator>().FirstOrDefault();
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287 | foreach (var creator in Problem.Operators.OfType<IParticleCreator>().OrderBy(x => x.Name)) {
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288 | ParticleCreatorParameter.ValidValues.Add(creator);
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289 | }
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290 | if (oldParticleCreator != null) {
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291 | var creator = ParticleCreatorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldParticleCreator.GetType());
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292 | if (creator != null) ParticleCreator = creator;
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293 | else oldParticleCreator = null;
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294 | }
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295 | if (oldParticleCreator == null && defaultParticleCreator != null)
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296 | ParticleCreator = defaultParticleCreator;
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297 | }
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298 | }
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299 |
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300 | private void InitializeAnalyzers() {
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301 | qualityAnalyzer = new BestAverageWorstQualityAnalyzer();
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302 | qualityAnalyzer.ResultsParameter.ActualName = "Results";
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303 | ParameterizeAnalyzers();
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304 | }
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305 |
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306 | private void ParameterizeAnalyzers() {
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307 | if (Problem != null) {
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308 | qualityAnalyzer.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
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309 | qualityAnalyzer.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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310 | qualityAnalyzer.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
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311 | }
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312 | }
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313 |
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314 | private void UpdateAnalyzers() {
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315 | Analyzer.Operators.Clear();
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316 | if (Problem != null) {
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317 | foreach (IAnalyzer analyzer in Problem.Operators.OfType<IAnalyzer>())
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318 | Analyzer.Operators.Add(analyzer, analyzer.EnabledByDefault);
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319 | }
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320 | Analyzer.Operators.Add(qualityAnalyzer, qualityAnalyzer.EnabledByDefault);
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321 | }
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322 |
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323 | private void InitInertiaUpdater() {
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324 | foreach (IDiscreteDoubleValueModifier updater in InertiaUpdaterParameter.ValidValues) {
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325 | updater.EndIndexParameter.ActualName = MaxIterationsParameter.Name;
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326 | updater.EndIndexParameter.Hidden = true;
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327 | updater.StartIndexParameter.Value = new IntValue(0);
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328 | updater.StartIndexParameter.Hidden = true;
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329 | updater.IndexParameter.ActualName = "Iterations";
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330 | updater.ValueParameter.ActualName = "CurrentInertia";
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331 | updater.StartValueParameter.ActualName = InertiaParameter.Name;
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332 | updater.EndValueParameter.Value = new DoubleValue(0.70);
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333 | }
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334 | }
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335 |
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336 | private void UpdateInertiaUpdater() {
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337 | IDiscreteDoubleValueModifier oldInertiaUpdater = InertiaUpdater;
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338 | InertiaUpdaterParameter.ValidValues.Clear();
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339 | foreach (IDiscreteDoubleValueModifier updater in ApplicationManager.Manager.GetInstances<IDiscreteDoubleValueModifier>().OrderBy(x => x.Name)) {
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340 | InertiaUpdaterParameter.ValidValues.Add(updater);
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341 | }
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342 | if (oldInertiaUpdater != null) {
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343 | IDiscreteDoubleValueModifier updater = InertiaUpdaterParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldInertiaUpdater.GetType());
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344 | if (updater != null) InertiaUpdaterParameter.Value = updater;
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345 | }
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346 | }
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347 |
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348 | private void UpdateTopologyInitializer() {
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349 | var oldTopologyInitializer = TopologyInitializer;
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350 | TopologyInitializerParameter.ValidValues.Clear();
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351 | foreach (ITopologyInitializer topologyInitializer in ApplicationManager.Manager.GetInstances<ITopologyInitializer>().OrderBy(x => x.Name)) {
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352 | TopologyInitializerParameter.ValidValues.Add(topologyInitializer);
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353 | }
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354 |
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355 | if (oldTopologyInitializer != null && TopologyInitializerParameter.ValidValues.Any(x => x.GetType() == oldTopologyInitializer.GetType()))
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356 | TopologyInitializer = TopologyInitializerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTopologyInitializer.GetType());
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357 | UpdateTopologyParameters();
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358 | }
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359 |
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360 | private void ParameterizeTopologyUpdaters() {
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361 | foreach (var updater in TopologyUpdaterParameter.ValidValues.OfType<MultiPSOTopologyUpdater>()) {
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362 | updater.CurrentIterationParameter.ActualName = "Iterations";
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363 | }
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364 | }
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365 |
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366 | private void UpdateParticleUpdaterParameter() {
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367 | var oldParticleUpdater = ParticleUpdater;
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368 | ParticleUpdaterParameter.ValidValues.Clear();
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369 | if (Problem != null) {
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370 | var defaultParticleUpdater = Problem.Operators.OfType<IParticleUpdater>().FirstOrDefault();
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371 |
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372 | foreach (var particleUpdater in Problem.Operators.OfType<IParticleUpdater>().OrderBy(x => x.Name))
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373 | ParticleUpdaterParameter.ValidValues.Add(particleUpdater);
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374 |
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375 | if (oldParticleUpdater != null) {
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376 | var newParticleUpdater = ParticleUpdaterParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldParticleUpdater.GetType());
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377 | if (newParticleUpdater != null) ParticleUpdater = newParticleUpdater;
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378 | else oldParticleUpdater = null;
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379 | }
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380 | if (oldParticleUpdater == null && defaultParticleUpdater != null)
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381 | ParticleUpdater = defaultParticleUpdater;
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382 | }
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383 | }
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384 |
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385 | private void UpdateTopologyParameters() {
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386 | ITopologyUpdater oldTopologyUpdater = TopologyUpdater;
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387 | TopologyUpdaterParameter.ValidValues.Clear();
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388 | if (Problem != null) {
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389 | if (TopologyInitializerParameter.Value != null) {
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390 | foreach (ITopologyUpdater topologyUpdater in ApplicationManager.Manager.GetInstances<ITopologyUpdater>())
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391 | TopologyUpdaterParameter.ValidValues.Add(topologyUpdater);
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392 |
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393 | if (oldTopologyUpdater != null) {
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394 | ITopologyUpdater newTopologyUpdater = TopologyUpdaterParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTopologyUpdater.GetType());
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395 | if (newTopologyUpdater != null) TopologyUpdater = newTopologyUpdater;
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396 | }
|
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397 | ParameterizeTopologyUpdaters();
|
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398 | }
|
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399 | }
|
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400 | }
|
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401 |
|
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402 | private void ParameterizeSolutionsCreator() {
|
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403 | if (Problem != null) {
|
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404 | solutionsCreator.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
|
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405 | if (ParticleCreatorParameter.Value != null)
|
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406 | solutionsCreator.SolutionCreatorParameter.ActualName = ParticleCreatorParameter.Name;
|
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407 | else
|
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408 | solutionsCreator.SolutionCreatorParameter.ActualName = Problem.SolutionCreatorParameter.Name;
|
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409 | }
|
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410 | }
|
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411 |
|
---|
412 | private void ParameterizeMainLoop() {
|
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413 | if (Problem != null) {
|
---|
414 | mainLoop.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
|
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415 | }
|
---|
416 | }
|
---|
417 |
|
---|
418 | private void InitializeSwarmUpdater() {
|
---|
419 | if (Problem != null) {
|
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420 | ISwarmUpdater updater = Problem.Operators.OfType<ISwarmUpdater>().FirstOrDefault();
|
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421 | SwarmUpdaterParameter.ValidValues.Clear();
|
---|
422 | if (updater != null) {
|
---|
423 | SwarmUpdaterParameter.ValidValues.Add(updater);
|
---|
424 | SwarmUpdaterParameter.Value = updater;
|
---|
425 | }
|
---|
426 | }
|
---|
427 | }
|
---|
428 | #endregion
|
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429 |
|
---|
430 | }
|
---|
431 | }
|
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