[3098] | 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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| 25 | using HeuristicLab.Core;
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| 26 | using HeuristicLab.Data;
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| 27 | using HeuristicLab.Optimization;
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| 28 | using HeuristicLab.Operators;
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| 29 | using HeuristicLab.Optimization.Operators;
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| 30 | using HeuristicLab.Parameters;
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| 31 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 32 | using HeuristicLab.PluginInfrastructure;
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| 33 |
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| 34 | namespace HeuristicLab.Algorithms.SimulatedAnnealing {
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| 35 | [Item("Simulated Annealing", "A simulated annealing algorithm.")]
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| 36 | [Creatable("Algorithms")]
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[3201] | 37 | [StorableClass]
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[3145] | 38 | public sealed class SimulatedAnnealing : EngineAlgorithm {
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[3098] | 39 | #region Problem Properties
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| 40 | public override Type ProblemType {
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| 41 | get { return typeof(ISingleObjectiveProblem); }
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| 42 | }
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| 43 | public new ISingleObjectiveProblem Problem {
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| 44 | get { return (ISingleObjectiveProblem)base.Problem; }
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| 45 | set { base.Problem = value; }
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| 46 | }
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| 47 | #endregion
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| 48 |
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| 49 | #region Parameter Properties
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| 50 | private ValueParameter<IntValue> SeedParameter {
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| 51 | get { return (ValueParameter<IntValue>)Parameters["Seed"]; }
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| 52 | }
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| 53 | private ValueParameter<BoolValue> SetSeedRandomlyParameter {
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| 54 | get { return (ValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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| 55 | }
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[3101] | 56 | private ConstrainedValueParameter<IMultiMoveGenerator> MoveGeneratorParameter {
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| 57 | get { return (ConstrainedValueParameter<IMultiMoveGenerator>)Parameters["MoveGenerator"]; }
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[3098] | 58 | }
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| 59 | private ConstrainedValueParameter<IMoveMaker> MoveMakerParameter {
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| 60 | get { return (ConstrainedValueParameter<IMoveMaker>)Parameters["MoveMaker"]; }
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| 61 | }
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| 62 | private ConstrainedValueParameter<ISingleObjectiveMoveEvaluator> MoveEvaluatorParameter {
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| 63 | get { return (ConstrainedValueParameter<ISingleObjectiveMoveEvaluator>)Parameters["MoveEvaluator"]; }
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| 64 | }
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| 65 | private ConstrainedValueParameter<IDiscreteDoubleValueModifier> AnnealingOperatorParameter {
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| 66 | get { return (ConstrainedValueParameter<IDiscreteDoubleValueModifier>)Parameters["AnnealingOperator"]; }
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| 67 | }
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| 68 | private ValueParameter<IntValue> MaximumIterationsParameter {
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| 69 | get { return (ValueParameter<IntValue>)Parameters["MaximumIterations"]; }
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| 70 | }
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[3101] | 71 | private ValueParameter<IntValue> InnerIterationsParameter {
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| 72 | get { return (ValueParameter<IntValue>)Parameters["InnerIterations"]; }
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| 73 | }
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[3098] | 74 | private ValueParameter<DoubleValue> StartTemperatureParameter {
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| 75 | get { return (ValueParameter<DoubleValue>)Parameters["StartTemperature"]; }
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| 76 | }
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| 77 | private ValueParameter<DoubleValue> EndTemperatureParameter {
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| 78 | get { return (ValueParameter<DoubleValue>)Parameters["EndTemperature"]; }
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| 79 | }
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| 80 | #endregion
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| 81 |
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| 82 | #region Properties
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| 83 | public IntValue Seed {
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| 84 | get { return SeedParameter.Value; }
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| 85 | set { SeedParameter.Value = value; }
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| 86 | }
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| 87 | public BoolValue SetSeedRandomly {
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| 88 | get { return SetSeedRandomlyParameter.Value; }
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| 89 | set { SetSeedRandomlyParameter.Value = value; }
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| 90 | }
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[3101] | 91 | public IMultiMoveGenerator MoveGenerator {
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[3098] | 92 | get { return MoveGeneratorParameter.Value; }
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| 93 | set { MoveGeneratorParameter.Value = value; }
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| 94 | }
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| 95 | public IMoveMaker MoveMaker {
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| 96 | get { return MoveMakerParameter.Value; }
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| 97 | set { MoveMakerParameter.Value = value; }
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| 98 | }
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| 99 | public ISingleObjectiveMoveEvaluator MoveEvaluator {
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| 100 | get { return MoveEvaluatorParameter.Value; }
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| 101 | set { MoveEvaluatorParameter.Value = value; }
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| 102 | }
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| 103 | public IntValue MaximumIterations {
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| 104 | get { return MaximumIterationsParameter.Value; }
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| 105 | set { MaximumIterationsParameter.Value = value; }
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| 106 | }
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[3101] | 107 | public IntValue InnerIterations {
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| 108 | get { return InnerIterationsParameter.Value; }
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| 109 | set { InnerIterationsParameter.Value = value; }
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| 110 | }
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| 111 | public DoubleValue StartTemperature {
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| 112 | get { return StartTemperatureParameter.Value; }
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| 113 | set { StartTemperatureParameter.Value = value; }
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| 114 | }
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| 115 | public DoubleValue EndTemperature {
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| 116 | get { return EndTemperatureParameter.Value; }
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| 117 | set { EndTemperatureParameter.Value = value; }
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| 118 | }
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[3098] | 119 | private RandomCreator RandomCreator {
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| 120 | get { return (RandomCreator)OperatorGraph.InitialOperator; }
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| 121 | }
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| 122 | private SolutionsCreator SolutionsCreator {
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| 123 | get { return (SolutionsCreator)RandomCreator.Successor; }
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| 124 | }
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| 125 | private SimulatedAnnealingMainLoop MainLoop {
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| 126 | get { return (SimulatedAnnealingMainLoop)SolutionsCreator.Successor; }
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| 127 | }
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| 128 |
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| 129 | private List<IDiscreteDoubleValueModifier> annealingOperators;
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| 130 | private IEnumerable<IDiscreteDoubleValueModifier> AnnealingOperators {
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| 131 | get { return annealingOperators; }
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| 132 | }
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| 133 | #endregion
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| 134 |
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| 135 | public SimulatedAnnealing()
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| 136 | : base() {
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| 137 | 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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| 138 | 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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[3101] | 139 | Parameters.Add(new ConstrainedValueParameter<IMultiMoveGenerator>("MoveGenerator", "The operator used to generate moves to the neighborhood of the current solution."));
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[3098] | 140 | Parameters.Add(new ConstrainedValueParameter<ISingleObjectiveMoveEvaluator>("MoveEvaluator", "The operator used to evaluate a move."));
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| 141 | Parameters.Add(new ConstrainedValueParameter<IMoveMaker>("MoveMaker", "The operator used to perform a move."));
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| 142 | Parameters.Add(new ConstrainedValueParameter<IDiscreteDoubleValueModifier>("AnnealingOperator", "The operator used to modify the temperature."));
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[3101] | 143 | Parameters.Add(new ValueParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed.", new IntValue(100)));
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| 144 | Parameters.Add(new ValueParameter<IntValue>("InnerIterations", "The amount of inner iterations (number of moves before temperature is adjusted again).", new IntValue(10)));
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[3098] | 145 | Parameters.Add(new ValueParameter<DoubleValue>("StartTemperature", "The initial temperature.", new DoubleValue(100)));
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| 146 | Parameters.Add(new ValueParameter<DoubleValue>("EndTemperature", "The final temperature which should be reached when iterations reaches maximum iterations.", new DoubleValue(1e-6)));
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| 147 |
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| 148 | RandomCreator randomCreator = new RandomCreator();
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| 149 | SolutionsCreator solutionsCreator = new SolutionsCreator();
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| 150 | SimulatedAnnealingMainLoop mainLoop = new SimulatedAnnealingMainLoop();
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| 151 | OperatorGraph.InitialOperator = randomCreator;
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| 152 |
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| 153 | randomCreator.RandomParameter.ActualName = "Random";
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| 154 | randomCreator.SeedParameter.ActualName = SeedParameter.Name;
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| 155 | randomCreator.SeedParameter.Value = null;
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| 156 | randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
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| 157 | randomCreator.SetSeedRandomlyParameter.Value = null;
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| 158 | randomCreator.Successor = solutionsCreator;
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| 159 |
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| 160 | solutionsCreator.NumberOfSolutions = new IntValue(1);
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| 161 | solutionsCreator.Successor = mainLoop;
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| 162 |
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| 163 | mainLoop.MoveGeneratorParameter.ActualName = MoveGeneratorParameter.Name;
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| 164 | mainLoop.MoveEvaluatorParameter.ActualName = MoveEvaluatorParameter.Name;
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| 165 | mainLoop.MoveMakerParameter.ActualName = MoveMakerParameter.Name;
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| 166 | mainLoop.AnnealingOperatorParameter.ActualName = AnnealingOperatorParameter.Name;
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| 167 | mainLoop.MaximumIterationsParameter.ActualName = MaximumIterationsParameter.Name;
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| 168 | mainLoop.StartTemperatureParameter.ActualName = StartTemperatureParameter.Name;
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| 169 | mainLoop.EndTemperatureParameter.ActualName = EndTemperatureParameter.Name;
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| 170 | mainLoop.RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
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| 171 | mainLoop.ResultsParameter.ActualName = "Results";
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| 172 |
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| 173 | Initialize();
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| 174 | }
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[3280] | 175 | [StorableConstructor]
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| 176 | private SimulatedAnnealing(bool deserializing) : base(deserializing) { }
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[3098] | 177 |
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| 178 | public override IDeepCloneable Clone(Cloner cloner) {
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| 179 | SimulatedAnnealing clone = (SimulatedAnnealing)base.Clone(cloner);
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| 180 | clone.Initialize();
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| 181 | return clone;
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| 182 | }
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| 183 |
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[3275] | 184 | public override void Prepare() {
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[3265] | 185 | if (Problem != null && MoveGenerator != null && MoveMaker != null && MoveEvaluator != null)
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[3275] | 186 | base.Prepare();
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[3189] | 187 | }
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| 188 |
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[3098] | 189 | #region Events
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| 190 | protected override void OnProblemChanged() {
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| 191 | ParameterizeStochasticOperator(Problem.SolutionCreator);
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| 192 | ParameterizeStochasticOperator(Problem.Evaluator);
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| 193 | foreach (IOperator op in Problem.Operators) ParameterizeStochasticOperator(op);
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| 194 | foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
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| 195 | op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
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| 196 | }
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| 197 | ParameterizeSolutionsCreator();
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| 198 | ParameterizeMainLoop();
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[3187] | 199 | UpdateMoveGenerator();
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| 200 | UpdateMoveParameters();
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[3101] | 201 | ParameterizeMoveEvaluators();
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| 202 | ParameterizeMoveMakers();
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| 203 | ParameterizeMoveGenerators();
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[3098] | 204 | Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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| 205 | base.OnProblemChanged();
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| 206 | }
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| 207 | protected override void Problem_SolutionCreatorChanged(object sender, EventArgs e) {
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| 208 | ParameterizeStochasticOperator(Problem.SolutionCreator);
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| 209 | ParameterizeSolutionsCreator();
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| 210 | base.Problem_SolutionCreatorChanged(sender, e);
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| 211 | }
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| 212 | protected override void Problem_EvaluatorChanged(object sender, EventArgs e) {
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| 213 | ParameterizeStochasticOperator(Problem.Evaluator);
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| 214 | ParameterizeSolutionsCreator();
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| 215 | ParameterizeMainLoop();
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[3101] | 216 | ParameterizeMoveEvaluators();
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| 217 | ParameterizeMoveMakers();
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[3098] | 218 | Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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| 219 | base.Problem_EvaluatorChanged(sender, e);
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| 220 | }
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[3145] | 221 | protected override void Problem_VisualizerChanged(object sender, EventArgs e) {
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| 222 | ParameterizeStochasticOperator(Problem.Visualizer);
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| 223 | ParameterizeMainLoop();
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| 224 | if (Problem.Visualizer != null) Problem.Visualizer.VisualizationParameter.ActualNameChanged += new EventHandler(Visualizer_VisualizationParameter_ActualNameChanged);
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| 225 | base.Problem_VisualizerChanged(sender, e);
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| 226 | }
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[3098] | 227 | protected override void Problem_OperatorsChanged(object sender, EventArgs e) {
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| 228 | foreach (IOperator op in Problem.Operators) ParameterizeStochasticOperator(op);
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| 229 | // This may seem pointless, but some operators already have the eventhandler registered, others don't
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| 230 | // FIXME: Is there another way to solve this problem?
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| 231 | foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
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| 232 | op.MoveQualityParameter.ActualNameChanged -= new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
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| 233 | op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
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| 234 | }
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| 235 | UpdateMoveGenerator();
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[3187] | 236 | UpdateMoveParameters();
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[3098] | 237 | ParameterizeMainLoop();
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[3101] | 238 | ParameterizeMoveEvaluators();
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| 239 | ParameterizeMoveMakers();
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| 240 | ParameterizeMoveGenerators();
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[3098] | 241 | base.Problem_OperatorsChanged(sender, e);
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| 242 | }
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| 243 | private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
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| 244 | ParameterizeMainLoop();
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[3101] | 245 | ParameterizeMoveEvaluators();
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| 246 | ParameterizeMoveMakers();
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[3098] | 247 | }
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| 248 | private void MoveGeneratorParameter_ValueChanged(object sender, EventArgs e) {
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| 249 | UpdateMoveParameters();
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| 250 | }
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| 251 | private void MoveEvaluatorParameter_ValueChanged(object sender, EventArgs e) {
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| 252 | ParameterizeMainLoop();
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[3101] | 253 | ParameterizeMoveEvaluators();
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| 254 | ParameterizeMoveMakers();
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[3098] | 255 | }
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| 256 | private void MoveEvaluator_MoveQualityParameter_ActualNameChanged(object sender, EventArgs e) {
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| 257 | ParameterizeMainLoop();
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[3101] | 258 | ParameterizeMoveEvaluators();
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| 259 | ParameterizeMoveMakers();
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[3098] | 260 | }
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[3145] | 261 | private void Visualizer_VisualizationParameter_ActualNameChanged(object sender, EventArgs e) {
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| 262 | ParameterizeMainLoop();
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| 263 | }
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[3098] | 264 | #endregion
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| 265 |
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| 266 | #region Helpers
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| 267 | [StorableHook(HookType.AfterDeserialization)]
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| 268 | private void Initialize() {
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| 269 | if (Problem != null) {
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| 270 | Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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| 271 | foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
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| 272 | op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
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| 273 | }
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| 274 | }
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| 275 | MoveGeneratorParameter.ValueChanged += new EventHandler(MoveGeneratorParameter_ValueChanged);
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| 276 | MoveEvaluatorParameter.ValueChanged += new EventHandler(MoveEvaluatorParameter_ValueChanged);
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| 277 | InitializeAnnealingOperators();
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| 278 | }
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| 279 | private void InitializeAnnealingOperators() {
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| 280 | annealingOperators = new List<IDiscreteDoubleValueModifier>();
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[3303] | 281 | annealingOperators.AddRange(ApplicationManager.Manager.GetInstances<IDiscreteDoubleValueModifier>().OrderBy(x => x.Name));
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| 282 | ParameterizeAnnealingOperators();
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[3098] | 283 | AnnealingOperatorParameter.ValidValues.Clear();
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| 284 | foreach (IDiscreteDoubleValueModifier op in annealingOperators)
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| 285 | AnnealingOperatorParameter.ValidValues.Add(op);
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| 286 | }
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| 287 | private void UpdateMoveGenerator() {
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[3101] | 288 | IMultiMoveGenerator oldMoveGenerator = MoveGenerator;
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[3098] | 289 | MoveGeneratorParameter.ValidValues.Clear();
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| 290 | if (Problem != null) {
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[3101] | 291 | foreach (IMultiMoveGenerator generator in Problem.Operators.OfType<IMultiMoveGenerator>().OrderBy(x => x.Name))
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[3098] | 292 | MoveGeneratorParameter.ValidValues.Add(generator);
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| 293 | }
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| 294 | if (oldMoveGenerator != null) {
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[3101] | 295 | IMultiMoveGenerator newMoveGenerator = MoveGeneratorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveGenerator.GetType());
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[3098] | 296 | if (newMoveGenerator != null) MoveGenerator = newMoveGenerator;
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| 297 | }
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| 298 | if (MoveGenerator == null) {
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| 299 | ClearMoveParameters();
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| 300 | }
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| 301 | }
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| 302 | private void UpdateMoveParameters() {
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| 303 | IMoveMaker oldMoveMaker = MoveMaker;
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| 304 | ISingleObjectiveMoveEvaluator oldMoveEvaluator = MoveEvaluator;
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| 305 | ClearMoveParameters();
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[3131] | 306 | if (MoveGenerator != null) {
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| 307 | List<Type> moveTypes = MoveGenerator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
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| 308 | foreach (Type type in moveTypes.ToList()) {
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| 309 | if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t)))
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| 310 | moveTypes.Remove(type);
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| 311 | }
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| 312 | foreach (Type type in moveTypes) {
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| 313 | var operators = Problem.Operators.Where(x => type.IsAssignableFrom(x.GetType())).OrderBy(x => x.Name);
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| 314 | foreach (IMoveMaker moveMaker in operators.OfType<IMoveMaker>())
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| 315 | MoveMakerParameter.ValidValues.Add(moveMaker);
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| 316 | foreach (ISingleObjectiveMoveEvaluator moveEvaluator in operators.OfType<ISingleObjectiveMoveEvaluator>())
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| 317 | MoveEvaluatorParameter.ValidValues.Add(moveEvaluator);
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| 318 | }
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| 319 | if (oldMoveMaker != null) {
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| 320 | IMoveMaker mm = MoveMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveMaker.GetType());
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| 321 | if (mm != null) MoveMaker = mm;
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| 322 | }
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| 323 | if (oldMoveEvaluator != null) {
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| 324 | ISingleObjectiveMoveEvaluator me = MoveEvaluatorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveEvaluator.GetType());
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| 325 | if (me != null) MoveEvaluator = me;
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| 326 | }
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[3098] | 327 | }
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| 328 | }
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| 329 | private void ClearMoveParameters() {
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| 330 | MoveMakerParameter.ValidValues.Clear();
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| 331 | MoveEvaluatorParameter.ValidValues.Clear();
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| 332 | }
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| 333 | private void ParameterizeSolutionsCreator() {
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| 334 | SolutionsCreator.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
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| 335 | SolutionsCreator.SolutionCreatorParameter.ActualName = Problem.SolutionCreatorParameter.Name;
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| 336 | }
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| 337 | private void ParameterizeMainLoop() {
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[3145] | 338 | MainLoop.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
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[3098] | 339 | MainLoop.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
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| 340 | MainLoop.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 341 | if (MoveEvaluator != null)
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| 342 | MainLoop.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
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[3145] | 343 | MainLoop.VisualizerParameter.ActualName = Problem.VisualizerParameter.Name;
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| 344 | if (Problem.Visualizer != null)
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| 345 | MainLoop.VisualizationParameter.ActualName = Problem.Visualizer.VisualizationParameter.ActualName;
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[3098] | 346 | }
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| 347 | private void ParameterizeStochasticOperator(IOperator op) {
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| 348 | if (op is IStochasticOperator)
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| 349 | ((IStochasticOperator)op).RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
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| 350 | }
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[3101] | 351 | private void ParameterizeMoveEvaluators() {
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[3098] | 352 | foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
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| 353 | op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 354 | }
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| 355 | }
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[3101] | 356 | private void ParameterizeMoveMakers() {
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[3098] | 357 | foreach (IMoveMaker op in Problem.Operators.OfType<IMoveMaker>()) {
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| 358 | op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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| 359 | if (MoveEvaluator != null)
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| 360 | op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
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| 361 | }
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| 362 | }
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| 363 | private void ParameterizeAnnealingOperators() {
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| 364 | foreach (IDiscreteDoubleValueModifier op in annealingOperators) {
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| 365 | op.IndexParameter.ActualName = "Iterations";
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| 366 | op.StartIndexParameter.Value = new IntValue(0);
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| 367 | op.EndIndexParameter.ActualName = MaximumIterationsParameter.Name;
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| 368 | op.ValueParameter.ActualName = "Temperature";
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| 369 | op.StartValueParameter.ActualName = StartTemperatureParameter.Name;
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| 370 | op.EndValueParameter.ActualName = EndTemperatureParameter.Name;
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| 371 | ParameterizeStochasticOperator(op);
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| 372 | }
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| 373 | }
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[3101] | 374 | private void ParameterizeMoveGenerators() {
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| 375 | foreach (IMultiMoveGenerator op in Problem.Operators.OfType<IMultiMoveGenerator>()) {
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| 376 | op.SampleSizeParameter.ActualName = InnerIterationsParameter.Name;
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| 377 | }
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| 378 | }
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[3098] | 379 | #endregion
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| 380 | }
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| 381 | }
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