[3070] | 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.Drawing;
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| 25 | using System.Linq;
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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.Encodings.BinaryVectorEncoding;
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| 30 | using HeuristicLab.Optimization;
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| 31 | using HeuristicLab.Parameters;
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| 32 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 33 | using HeuristicLab.PluginInfrastructure;
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[3641] | 34 | using HeuristicLab.Problems.Knapsack.Analyzers;
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[3070] | 35 |
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| 36 | namespace HeuristicLab.Problems.Knapsack {
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[3528] | 37 | [Item("Knapsack Problem", "Represents a Knapsack Problem.")]
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[3070] | 38 | [Creatable("Problems")]
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| 39 | [StorableClass]
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[3166] | 40 | public sealed class KnapsackProblem : ParameterizedNamedItem, ISingleObjectiveProblem {
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[3070] | 41 | public override Image ItemImage {
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| 42 | get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
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| 43 | }
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| 44 |
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| 45 | #region Parameter Properties
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| 46 | public ValueParameter<BoolValue> MaximizationParameter {
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| 47 | get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
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| 48 | }
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| 49 | IParameter ISingleObjectiveProblem.MaximizationParameter {
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| 50 | get { return MaximizationParameter; }
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| 51 | }
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| 52 | public ValueParameter<IntValue> KnapsackCapacityParameter {
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| 53 | get { return (ValueParameter<IntValue>)Parameters["KnapsackCapacity"]; }
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| 54 | }
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| 55 | public ValueParameter<IntArray> WeightsParameter {
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| 56 | get { return (ValueParameter<IntArray>)Parameters["Weights"]; }
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| 57 | }
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| 58 | public ValueParameter<IntArray> ValuesParameter {
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| 59 | get { return (ValueParameter<IntArray>)Parameters["Values"]; }
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| 60 | }
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[3109] | 61 | public ValueParameter<DoubleValue> PenaltyParameter {
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| 62 | get { return (ValueParameter<DoubleValue>)Parameters["Penalty"]; }
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| 63 | }
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[3070] | 64 | public ValueParameter<IBinaryVectorCreator> SolutionCreatorParameter {
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| 65 | get { return (ValueParameter<IBinaryVectorCreator>)Parameters["SolutionCreator"]; }
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| 66 | }
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| 67 | IParameter IProblem.SolutionCreatorParameter {
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| 68 | get { return SolutionCreatorParameter; }
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| 69 | }
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| 70 | public ValueParameter<IKnapsackEvaluator> EvaluatorParameter {
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| 71 | get { return (ValueParameter<IKnapsackEvaluator>)Parameters["Evaluator"]; }
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| 72 | }
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| 73 | IParameter IProblem.EvaluatorParameter {
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| 74 | get { return EvaluatorParameter; }
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| 75 | }
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[3071] | 76 | public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
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| 77 | get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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| 78 | }
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[3080] | 79 | IParameter ISingleObjectiveProblem.BestKnownQualityParameter {
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| 80 | get { return BestKnownQualityParameter; }
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| 81 | }
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[3070] | 82 | #endregion
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| 83 |
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| 84 | #region Properties
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[3109] | 85 | public IntValue KnapsackCapacity {
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| 86 | get { return KnapsackCapacityParameter.Value; }
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| 87 | set { KnapsackCapacityParameter.Value = value; }
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| 88 | }
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| 89 | public IntArray Weights {
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| 90 | get { return WeightsParameter.Value; }
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| 91 | set { WeightsParameter.Value = value; }
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| 92 | }
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| 93 | public IntArray Values {
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| 94 | get { return ValuesParameter.Value; }
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| 95 | set { ValuesParameter.Value = value; }
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| 96 | }
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| 97 | public DoubleValue Penalty {
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| 98 | get { return PenaltyParameter.Value; }
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| 99 | set { PenaltyParameter.Value = value; }
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| 100 | }
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[3070] | 101 | public IBinaryVectorCreator SolutionCreator {
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| 102 | get { return SolutionCreatorParameter.Value; }
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| 103 | set { SolutionCreatorParameter.Value = value; }
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| 104 | }
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| 105 | ISolutionCreator IProblem.SolutionCreator {
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| 106 | get { return SolutionCreatorParameter.Value; }
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| 107 | }
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| 108 | public IKnapsackEvaluator Evaluator {
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| 109 | get { return EvaluatorParameter.Value; }
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| 110 | set { EvaluatorParameter.Value = value; }
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| 111 | }
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| 112 | ISingleObjectiveEvaluator ISingleObjectiveProblem.Evaluator {
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| 113 | get { return EvaluatorParameter.Value; }
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| 114 | }
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| 115 | IEvaluator IProblem.Evaluator {
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| 116 | get { return EvaluatorParameter.Value; }
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| 117 | }
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[3071] | 118 | public DoubleValue BestKnownQuality {
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| 119 | get { return BestKnownQualityParameter.Value; }
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| 120 | set { BestKnownQualityParameter.Value = value; }
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| 121 | }
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[3641] | 122 | private List<IOperator> operators;
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[3070] | 123 | public IEnumerable<IOperator> Operators {
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| 124 | get { return operators.Cast<IOperator>(); }
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| 125 | }
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[3667] | 126 | private BestKnapsackSolutionAnalyzer BestKnapsackSolutionAnalyzer {
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| 127 | get { return operators.OfType<BestKnapsackSolutionAnalyzer>().FirstOrDefault(); }
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[3641] | 128 | }
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[3070] | 129 | #endregion
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| 130 |
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[3125] | 131 | private void InitializeRandomKnapsackInstance() {
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| 132 | System.Random rand = new System.Random();
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| 133 |
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| 134 | int itemCount = rand.Next(10, 100);
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| 135 | Weights = new IntArray(itemCount);
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| 136 | Values = new IntArray(itemCount);
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| 137 |
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[3537] | 138 | double totalWeight = 0;
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| 139 |
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[3125] | 140 | for (int i = 0; i < itemCount; i++ ) {
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| 141 | int value = rand.Next(1, 10);
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| 142 | int weight = rand.Next(1, 10);
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| 143 |
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| 144 | Values[i] = value;
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| 145 | Weights[i] = weight;
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[3537] | 146 | totalWeight += weight;
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[3125] | 147 | }
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[3537] | 148 |
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| 149 | int capacity = (int)Math.Round(0.7 * totalWeight);
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| 150 | KnapsackCapacity = new IntValue(capacity);
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[3125] | 151 | }
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| 152 |
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[3166] | 153 | public KnapsackProblem()
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[3070] | 154 | : base() {
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| 155 | RandomBinaryVectorCreator creator = new RandomBinaryVectorCreator();
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| 156 | KnapsackEvaluator evaluator = new KnapsackEvaluator();
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| 157 |
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| 158 | Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to true as the Knapsack Problem is a maximization problem.", new BoolValue(true)));
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| 159 | Parameters.Add(new ValueParameter<IntValue>("KnapsackCapacity", "Capacity of the Knapsack.", new IntValue(0)));
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| 160 | Parameters.Add(new ValueParameter<IntArray>("Weights", "The weights of the items.", new IntArray(5)));
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| 161 | Parameters.Add(new ValueParameter<IntArray>("Values", "The values of the items.", new IntArray(5)));
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| 162 | Parameters.Add(new ValueParameter<DoubleValue>("Penalty", "The penalty value for each unit of overweight.", new DoubleValue(1)));
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| 163 | Parameters.Add(new ValueParameter<IBinaryVectorCreator>("SolutionCreator", "The operator which should be used to create new Knapsack solutions.", creator));
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| 164 | Parameters.Add(new ValueParameter<IKnapsackEvaluator>("Evaluator", "The operator which should be used to evaluate Knapsack solutions.", evaluator));
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[3071] | 165 | Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this Knapsack instance."));
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[3070] | 166 |
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| 167 | creator.BinaryVectorParameter.ActualName = "KnapsackSolution";
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[3125] | 168 |
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| 169 | InitializeRandomKnapsackInstance();
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| 170 |
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[3070] | 171 | ParameterizeSolutionCreator();
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| 172 | ParameterizeEvaluator();
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| 173 |
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| 174 | Initialize();
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| 175 | }
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| 176 |
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| 177 | [StorableConstructor]
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[3166] | 178 | private KnapsackProblem(bool deserializing) : base() { }
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[3070] | 179 |
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| 180 | public override IDeepCloneable Clone(Cloner cloner) {
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[3166] | 181 | KnapsackProblem clone = (KnapsackProblem)base.Clone(cloner);
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[3070] | 182 | clone.Initialize();
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| 183 | return clone;
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| 184 | }
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| 185 |
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| 186 | #region Events
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| 187 | public event EventHandler SolutionCreatorChanged;
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| 188 | private void OnSolutionCreatorChanged() {
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| 189 | if (SolutionCreatorChanged != null)
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| 190 | SolutionCreatorChanged(this, EventArgs.Empty);
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| 191 | }
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| 192 | public event EventHandler EvaluatorChanged;
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| 193 | private void OnEvaluatorChanged() {
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| 194 | if (EvaluatorChanged != null)
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| 195 | EvaluatorChanged(this, EventArgs.Empty);
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| 196 | }
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[3109] | 197 |
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[3070] | 198 | public event EventHandler OperatorsChanged;
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| 199 | private void OnOperatorsChanged() {
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| 200 | if (OperatorsChanged != null)
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| 201 | OperatorsChanged(this, EventArgs.Empty);
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| 202 | }
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| 203 |
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| 204 | private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
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[3641] | 205 | SolutionCreator.BinaryVectorParameter.ActualNameChanged += new EventHandler(SolutionCreator_BinaryVectorParameter_ActualNameChanged);
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[3070] | 206 | ParameterizeSolutionCreator();
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| 207 | ParameterizeEvaluator();
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[3667] | 208 | ParameterizeAnalyzer();
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[3070] | 209 | ParameterizeOperators();
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| 210 | OnSolutionCreatorChanged();
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| 211 | }
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[3641] | 212 | private void SolutionCreator_BinaryVectorParameter_ActualNameChanged(object sender, EventArgs e) {
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[3070] | 213 | ParameterizeEvaluator();
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[3667] | 214 | ParameterizeAnalyzer();
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[3070] | 215 | ParameterizeOperators();
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| 216 | }
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| 217 | private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
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| 218 | ParameterizeEvaluator();
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[3667] | 219 | ParameterizeAnalyzer();
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[3070] | 220 | OnEvaluatorChanged();
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| 221 | }
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[3109] | 222 | void KnapsackCapacityParameter_ValueChanged(object sender, EventArgs e) {
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| 223 | ParameterizeEvaluator();
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[3667] | 224 | ParameterizeAnalyzer();
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[3070] | 225 | }
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[3109] | 226 | void WeightsParameter_ValueChanged(object sender, EventArgs e) {
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| 227 | ParameterizeEvaluator();
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[3667] | 228 | ParameterizeAnalyzer();
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[3110] | 229 | ParameterizeSolutionCreator();
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[3111] | 230 |
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| 231 | WeightsParameter.Value.Reset += new EventHandler(WeightsValue_Reset);
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[3070] | 232 | }
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[3111] | 233 | void WeightsValue_Reset(object sender, EventArgs e) {
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| 234 | ParameterizeSolutionCreator();
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[3463] | 235 |
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| 236 | if (WeightsParameter.Value != null && ValuesParameter.Value != null)
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| 237 | ((IStringConvertibleArray)ValuesParameter.Value).Length = WeightsParameter.Value.Length;
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[3111] | 238 | }
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[3109] | 239 | void ValuesParameter_ValueChanged(object sender, EventArgs e) {
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| 240 | ParameterizeEvaluator();
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[3667] | 241 | ParameterizeAnalyzer();
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[3110] | 242 | ParameterizeSolutionCreator();
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[3111] | 243 |
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| 244 | ValuesParameter.Value.Reset += new EventHandler(ValuesValue_Reset);
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[3109] | 245 | }
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[3111] | 246 | void ValuesValue_Reset(object sender, EventArgs e) {
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| 247 | ParameterizeSolutionCreator();
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[3463] | 248 |
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| 249 | if (WeightsParameter.Value != null && ValuesParameter.Value != null)
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| 250 | ((IStringConvertibleArray)WeightsParameter.Value).Length = ValuesParameter.Value.Length;
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[3111] | 251 | }
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[3109] | 252 | void PenaltyParameter_ValueChanged(object sender, EventArgs e) {
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| 253 | ParameterizeEvaluator();
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| 254 | }
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[3124] | 255 | void OneBitflipMoveParameter_ActualNameChanged(object sender, EventArgs e) {
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| 256 | string name = ((ILookupParameter<OneBitflipMove>)sender).ActualName;
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| 257 | foreach (IOneBitflipMoveOperator op in Operators.OfType<IOneBitflipMoveOperator>()) {
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| 258 | op.OneBitflipMoveParameter.ActualName = name;
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| 259 | }
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| 260 | }
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[3070] | 261 | #endregion
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| 262 |
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| 263 | #region Helpers
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| 264 | [StorableHook(HookType.AfterDeserialization)]
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| 265 | private void Initialize() {
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| 266 | InitializeOperators();
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| 267 | SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
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[3641] | 268 | SolutionCreator.BinaryVectorParameter.ActualNameChanged += new EventHandler(SolutionCreator_BinaryVectorParameter_ActualNameChanged);
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[3070] | 269 | EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
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[3109] | 270 | KnapsackCapacityParameter.ValueChanged += new EventHandler(KnapsackCapacityParameter_ValueChanged);
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| 271 | WeightsParameter.ValueChanged += new EventHandler(WeightsParameter_ValueChanged);
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[3111] | 272 | WeightsParameter.Value.Reset += new EventHandler(WeightsValue_Reset);
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[3109] | 273 | ValuesParameter.ValueChanged += new EventHandler(ValuesParameter_ValueChanged);
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[3111] | 274 | ValuesParameter.Value.Reset += new EventHandler(ValuesValue_Reset);
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[3109] | 275 | PenaltyParameter.ValueChanged += new EventHandler(PenaltyParameter_ValueChanged);
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[3070] | 276 | }
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| 277 | private void ParameterizeSolutionCreator() {
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| 278 | if(SolutionCreator.LengthParameter.Value == null ||
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| 279 | SolutionCreator.LengthParameter.Value.Value != WeightsParameter.Value.Length)
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| 280 | SolutionCreator.LengthParameter.Value = new IntValue(WeightsParameter.Value.Length);
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| 281 | }
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| 282 | private void ParameterizeEvaluator() {
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| 283 | if (Evaluator is KnapsackEvaluator) {
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| 284 | KnapsackEvaluator knapsackEvaluator =
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| 285 | (KnapsackEvaluator)Evaluator;
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| 286 | knapsackEvaluator.BinaryVectorParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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[3109] | 287 | knapsackEvaluator.KnapsackCapacityParameter.ActualName = KnapsackCapacityParameter.Name;
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[3070] | 288 | knapsackEvaluator.WeightsParameter.ActualName = WeightsParameter.Name;
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| 289 | knapsackEvaluator.ValuesParameter.ActualName = ValuesParameter.Name;
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| 290 | knapsackEvaluator.PenaltyParameter.ActualName = PenaltyParameter.Name;
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| 291 | }
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| 292 | }
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[3667] | 293 | private void ParameterizeAnalyzer() {
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| 294 | BestKnapsackSolutionAnalyzer.BinaryVectorParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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| 295 | BestKnapsackSolutionAnalyzer.KnapsackCapacityParameter.ActualName = KnapsackCapacityParameter.Name;
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| 296 | BestKnapsackSolutionAnalyzer.WeightsParameter.ActualName = WeightsParameter.Name;
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| 297 | BestKnapsackSolutionAnalyzer.ValuesParameter.ActualName = ValuesParameter.Name;
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| 298 | BestKnapsackSolutionAnalyzer.ResultsParameter.ActualName = "Results";
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[3467] | 299 | }
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[3070] | 300 | private void InitializeOperators() {
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[3641] | 301 | operators = new List<IOperator>();
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| 302 | operators.Add(new BestKnapsackSolutionAnalyzer());
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[3667] | 303 | ParameterizeAnalyzer();
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[3303] | 304 | foreach (IBinaryVectorOperator op in ApplicationManager.Manager.GetInstances<IBinaryVectorOperator>()) {
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| 305 | if (!(op is ISingleObjectiveMoveEvaluator) || (op is IKnapsackMoveEvaluator)) {
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| 306 | operators.Add(op);
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[3127] | 307 | }
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[3070] | 308 | }
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[3303] | 309 | ParameterizeOperators();
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[3124] | 310 | InitializeMoveGenerators();
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[3070] | 311 | }
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[3124] | 312 | private void InitializeMoveGenerators() {
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| 313 | foreach (IOneBitflipMoveOperator op in Operators.OfType<IOneBitflipMoveOperator>()) {
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| 314 | if (op is IMoveGenerator) {
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| 315 | op.OneBitflipMoveParameter.ActualNameChanged += new EventHandler(OneBitflipMoveParameter_ActualNameChanged);
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| 316 | }
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| 317 | }
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| 318 | }
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[3070] | 319 | private void ParameterizeOperators() {
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| 320 | foreach (IBinaryVectorCrossover op in Operators.OfType<IBinaryVectorCrossover>()) {
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| 321 | op.ParentsParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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| 322 | op.ChildParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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| 323 | }
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| 324 | foreach (IBinaryVectorManipulator op in Operators.OfType<IBinaryVectorManipulator>()) {
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| 325 | op.BinaryVectorParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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| 326 | }
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[3124] | 327 | foreach (IBinaryVectorMoveOperator op in Operators.OfType<IBinaryVectorMoveOperator>()) {
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| 328 | op.BinaryVectorParameter.ActualName = SolutionCreator.BinaryVectorParameter.ActualName;
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| 329 | }
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| 330 | foreach (IKnapsackMoveEvaluator op in Operators.OfType<IKnapsackMoveEvaluator>()) {
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| 331 | op.KnapsackCapacityParameter.ActualName = KnapsackCapacityParameter.Name;
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| 332 | op.PenaltyParameter.ActualName = PenaltyParameter.Name;
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| 333 | op.WeightsParameter.ActualName = WeightsParameter.Name;
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| 334 | op.ValuesParameter.ActualName = ValuesParameter.Name;
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| 335 | }
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[3070] | 336 | }
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| 337 | #endregion
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| 338 | }
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| 339 | }
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