1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 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 HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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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 | [StorableClass("8451459D-2C4D-4B1D-AE82-9AC2A5B43CDB")]
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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(bool deserializing) : base(deserializing) { }
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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 | UniformSubScopesProcessor uniformSubScopeProcessor = new UniformSubScopesProcessor();
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125 | Placeholder particleUpdaterPlaceholder = new Placeholder();
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126 | Placeholder topologyUpdaterPlaceholder = new Placeholder();
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127 | UniformSubScopesProcessor evaluationProcessor = new UniformSubScopesProcessor();
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128 | Placeholder swarmUpdater = new Placeholder();
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129 | IntCounter iterationsCounter = new IntCounter();
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130 | Comparator iterationsComparator = new Comparator();
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131 | ConditionalBranch conditionalBranch = new ConditionalBranch();
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132 | Placeholder inertiaUpdaterPlaceholder = new Placeholder();
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133 | SubScopesCounter subScopesCounter = new SubScopesCounter();
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134 | #endregion
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135 |
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136 | #region Create operator graph
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137 | OperatorGraph.InitialOperator = resultsCollector;
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138 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
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139 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("CurrentInertia"));
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140 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Evaluated Solutions", null, "EvaluatedSolutions"));
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141 | resultsCollector.ResultsParameter.ActualName = "Results";
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142 | resultsCollector.Successor = swarmUpdaterPlaceholer1;
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143 |
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144 | swarmUpdaterPlaceholer1.Name = "(Swarm Updater)";
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145 | swarmUpdaterPlaceholer1.OperatorParameter.ActualName = SwarmUpdaterParameter.ActualName;
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146 | swarmUpdaterPlaceholer1.Successor = analyzerPlaceholder;
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147 |
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148 | analyzerPlaceholder.Name = "(Analyzer)";
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149 | analyzerPlaceholder.OperatorParameter.ActualName = AnalyzerParameter.Name;
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150 | analyzerPlaceholder.Successor = uniformSubScopeProcessor;
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151 |
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152 | uniformSubScopeProcessor.Operator = particleUpdaterPlaceholder;
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153 | uniformSubScopeProcessor.Successor = evaluationProcessor;
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154 |
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155 | particleUpdaterPlaceholder.Name = "(ParticleUpdater)";
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156 | particleUpdaterPlaceholder.OperatorParameter.ActualName = ParticleUpdaterParameter.Name;
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157 |
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158 | evaluationProcessor.Parallel = new BoolValue(true);
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159 | evaluationProcessor.Operator = evaluatorPlaceholder;
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160 | evaluationProcessor.Successor = subScopesCounter;
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161 |
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162 | evaluatorPlaceholder.Name = "(Evaluator)";
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163 | evaluatorPlaceholder.OperatorParameter.ActualName = EvaluatorParameter.Name;
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164 |
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165 | subScopesCounter.Name = "Increment EvaluatedSolutions";
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166 | subScopesCounter.ValueParameter.ActualName = EvaluatedSolutionsParameter.Name;
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167 | subScopesCounter.Successor = topologyUpdaterPlaceholder;
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168 |
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169 | topologyUpdaterPlaceholder.Name = "(TopologyUpdater)";
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170 | topologyUpdaterPlaceholder.OperatorParameter.ActualName = TopologyUpdaterParameter.Name;
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171 | topologyUpdaterPlaceholder.Successor = swarmUpdater;
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172 |
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173 | swarmUpdater.Name = "(Swarm Updater)";
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174 | swarmUpdater.OperatorParameter.ActualName = SwarmUpdaterParameter.ActualName;
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175 | swarmUpdater.Successor = inertiaUpdaterPlaceholder;
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176 |
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177 | inertiaUpdaterPlaceholder.Name = "(Inertia Updater)";
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178 | inertiaUpdaterPlaceholder.OperatorParameter.ActualName = InertiaUpdaterParameter.ActualName;
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179 | inertiaUpdaterPlaceholder.Successor = iterationsCounter;
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180 |
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181 | iterationsCounter.Name = "Iterations++";
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182 | iterationsCounter.ValueParameter.ActualName = "Iterations";
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183 | iterationsCounter.Successor = iterationsComparator;
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184 |
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185 | iterationsComparator.LeftSideParameter.ActualName = "Iterations";
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186 | iterationsComparator.Comparison = new Comparison(ComparisonType.Less);
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187 | iterationsComparator.RightSideParameter.ActualName = "MaxIterations";
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188 | iterationsComparator.ResultParameter.ActualName = "ContinueIteration";
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189 | iterationsComparator.Successor = conditionalBranch;
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190 |
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191 | conditionalBranch.Name = "ContinueIteration?";
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192 | conditionalBranch.ConditionParameter.ActualName = "ContinueIteration";
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193 | conditionalBranch.TrueBranch = analyzerPlaceholder;
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194 | #endregion
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195 | }
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196 |
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197 | public override IOperation Apply() {
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198 | if (this.ParticleUpdaterParameter.ActualValue == null)
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199 | return null;
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200 | return base.Apply();
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201 | }
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202 | }
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203 | }
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