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source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/VehicleRoutingProblem.cs @ 4068

Last change on this file since 4068 was 4068, checked in by swagner, 14 years ago

Sorted usings and removed unused usings in entire solution (#1094)
File size: 22.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Encodings.PermutationEncoding;
30using HeuristicLab.Optimization;
31using HeuristicLab.Parameters;
32using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
33using HeuristicLab.PluginInfrastructure;
34using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
35
36namespace HeuristicLab.Problems.VehicleRouting {
37  [Item("Vehicle Routing Problem", "Represents a Vehicle Routing Problem.")]
38  [Creatable("Problems")]
39  [StorableClass]
40  public sealed class VehicleRoutingProblem : ParameterizedNamedItem, ISingleObjectiveProblem {
41    public override Image ItemImage {
42      get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
43    }
44
45    #region Parameter Properties
46    public ValueParameter<BoolValue> MaximizationParameter {
47      get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
48    }
49    IParameter ISingleObjectiveProblem.MaximizationParameter {
50      get { return MaximizationParameter; }
51    }
52    public ValueParameter<DoubleMatrix> CoordinatesParameter {
53      get { return (ValueParameter<DoubleMatrix>)Parameters["Coordinates"]; }
54    }
55    public OptionalValueParameter<DoubleMatrix> DistanceMatrixParameter {
56      get { return (OptionalValueParameter<DoubleMatrix>)Parameters["DistanceMatrix"]; }
57    }
58    public ValueParameter<BoolValue> UseDistanceMatrixParameter {
59      get { return (ValueParameter<BoolValue>)Parameters["UseDistanceMatrix"]; }
60    }
61    public ValueParameter<IntValue> VehiclesParameter {
62      get { return (ValueParameter<IntValue>)Parameters["Vehicles"]; }
63    }
64    public ValueParameter<DoubleValue> CapacityParameter {
65      get { return (ValueParameter<DoubleValue>)Parameters["Capacity"]; }
66    }
67    public ValueParameter<DoubleArray> DemandParameter {
68      get { return (ValueParameter<DoubleArray>)Parameters["Demand"]; }
69    }
70    public ValueParameter<DoubleArray> ReadyTimeParameter {
71      get { return (ValueParameter<DoubleArray>)Parameters["ReadyTime"]; }
72    }
73    public ValueParameter<DoubleArray> DueTimeParameter {
74      get { return (ValueParameter<DoubleArray>)Parameters["DueTime"]; }
75    }
76    public ValueParameter<DoubleArray> ServiceTimeParameter {
77      get { return (ValueParameter<DoubleArray>)Parameters["ServiceTime"]; }
78    }
79    ValueParameter<IVRPCreator> SolutionCreatorParameter {
80      get { return (ValueParameter<IVRPCreator>)Parameters["SolutionCreator"]; }
81    }
82    IParameter IProblem.SolutionCreatorParameter {
83      get { return SolutionCreatorParameter; }
84    }
85    ValueParameter<IVRPEvaluator> EvaluatorParameter {
86      get { return (ValueParameter<IVRPEvaluator>)Parameters["Evaluator"]; }
87    }
88    IParameter IProblem.EvaluatorParameter {
89      get { return EvaluatorParameter; }
90    }
91    public IValueParameter<DoubleValue> FleetUsageFactor {
92      get { return (IValueParameter<DoubleValue>)Parameters["FleetUsageFactor"]; }
93    }
94    public IValueParameter<DoubleValue> TimeFactor {
95      get { return (IValueParameter<DoubleValue>)Parameters["TimeFactor"]; }
96    }
97    public IValueParameter<DoubleValue> DistanceFactor {
98      get { return (IValueParameter<DoubleValue>)Parameters["DistanceFactor"]; }
99    }
100    public IValueParameter<DoubleValue> OverloadPenalty {
101      get { return (IValueParameter<DoubleValue>)Parameters["OverloadPenalty"]; }
102    }
103    public IValueParameter<DoubleValue> TardinessPenalty {
104      get { return (IValueParameter<DoubleValue>)Parameters["TardinessPenalty"]; }
105    }
106    public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
107      get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
108    }
109    IParameter ISingleObjectiveProblem.BestKnownQualityParameter {
110      get { return BestKnownQualityParameter; }
111    }
112    #endregion
113
114    #region Properties
115    public DoubleMatrix Coordinates {
116      get { return CoordinatesParameter.Value; }
117      set { CoordinatesParameter.Value = value; }
118    }
119    public DoubleMatrix DistanceMatrix {
120      get { return DistanceMatrixParameter.Value; }
121      set { DistanceMatrixParameter.Value = value; }
122    }
123    public BoolValue UseDistanceMatrix {
124      get { return UseDistanceMatrixParameter.Value; }
125      set { UseDistanceMatrixParameter.Value = value; }
126    }
127    public IntValue Vehicles {
128      get { return VehiclesParameter.Value; }
129      set { VehiclesParameter.Value = value; }
130    }
131    public DoubleValue Capacity {
132      get { return CapacityParameter.Value; }
133      set { CapacityParameter.Value = value; }
134    }
135    public DoubleArray Demand {
136      get { return DemandParameter.Value; }
137      set { DemandParameter.Value = value; }
138    }
139    public DoubleArray ReadyTime {
140      get { return ReadyTimeParameter.Value; }
141      set { ReadyTimeParameter.Value = value; }
142    }
143    public DoubleArray DueTime {
144      get { return DueTimeParameter.Value; }
145      set { DueTimeParameter.Value = value; }
146    }
147    public DoubleArray ServiceTime {
148      get { return ServiceTimeParameter.Value; }
149      set { ServiceTimeParameter.Value = value; }
150    }
151    public DoubleValue BestKnownQuality {
152      get { return BestKnownQualityParameter.Value; }
153      set { BestKnownQualityParameter.Value = value; }
154    }
155    IVRPCreator SolutionCreator {
156      get { return SolutionCreatorParameter.Value; }
157      set { SolutionCreatorParameter.Value = value; }
158    }
159    ISolutionCreator IProblem.SolutionCreator {
160      get { return SolutionCreatorParameter.Value; }
161    }
162    IVRPEvaluator Evaluator {
163      get { return EvaluatorParameter.Value; }
164      set { EvaluatorParameter.Value = value; }
165    }
166    ISingleObjectiveEvaluator ISingleObjectiveProblem.Evaluator {
167      get { return EvaluatorParameter.Value; }
168    }
169    IEvaluator IProblem.Evaluator {
170      get { return EvaluatorParameter.Value; }
171    }
172    private List<IOperator> operators;
173    public IEnumerable<IOperator> Operators {
174      get { return operators; }
175    }
176    private BestVRPSolutionAnalyzer BestVRPSolutionAnalyzer {
177      get { return operators.OfType<BestVRPSolutionAnalyzer>().FirstOrDefault(); }
178    }
179    #endregion
180
181    public VehicleRoutingProblem()
182      : base() {
183      IVRPCreator creator = new AlbaPermutationCreator();
184      IVRPEvaluator evaluator = new VRPEvaluator();
185
186      Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Vehicle Routing Problem is a minimization problem.", new BoolValue(false)));
187      Parameters.Add(new ValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the cities.", new DoubleMatrix()));
188      Parameters.Add(new OptionalValueParameter<DoubleMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
189      Parameters.Add(new ValueParameter<BoolValue>("UseDistanceMatrix", "True if a distance matrix should be calculated and used for evaluation, otherwise false.", new BoolValue(true)));
190      Parameters.Add(new ValueParameter<IntValue>("Vehicles", "The number of vehicles.", new IntValue(0)));
191      Parameters.Add(new ValueParameter<DoubleValue>("Capacity", "The capacity of each vehicle.", new DoubleValue(0)));
192      Parameters.Add(new ValueParameter<DoubleArray>("Demand", "The demand of each customer.", new DoubleArray()));
193      Parameters.Add(new ValueParameter<DoubleArray>("ReadyTime", "The ready time of each customer.", new DoubleArray()));
194      Parameters.Add(new ValueParameter<DoubleArray>("DueTime", "The due time of each customer.", new DoubleArray()));
195      Parameters.Add(new ValueParameter<DoubleArray>("ServiceTime", "The service time of each customer.", new DoubleArray()));
196      Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this VRP instance."));
197      Parameters.Add(new ValueParameter<DoubleValue>("FleetUsageFactor", "The fleet usage factor considered in the evaluation.", new DoubleValue(100)));
198      Parameters.Add(new ValueParameter<DoubleValue>("TimeFactor", "The time factor considered in the evaluation.", new DoubleValue(0)));
199      Parameters.Add(new ValueParameter<DoubleValue>("DistanceFactor", "The distance factor considered in the evaluation.", new DoubleValue(1)));
200      Parameters.Add(new ValueParameter<DoubleValue>("OverloadPenalty", "The overload penalty considered in the evaluation.", new DoubleValue(100)));
201      Parameters.Add(new ValueParameter<DoubleValue>("TardinessPenalty", "The tardiness penalty considered in the evaluation.", new DoubleValue(100)));
202
203      Parameters.Add(new ValueParameter<IVRPCreator>("SolutionCreator", "The operator which should be used to create new VRP solutions.", creator));
204      Parameters.Add(new ValueParameter<IVRPEvaluator>("Evaluator", "The operator which should be used to evaluate VRP solutions.", evaluator));
205
206      creator.VRPSolutionParameter.ActualName = "VRPSolution";
207      evaluator.QualityParameter.ActualName = "VRPQuality";
208      ParameterizeSolutionCreator();
209      ParameterizeEvaluator();
210
211      Initialize();
212    }
213    [StorableConstructor]
214    private VehicleRoutingProblem(bool deserializing) : base() { }
215
216    public override IDeepCloneable Clone(Cloner cloner) {
217      VehicleRoutingProblem clone = (VehicleRoutingProblem)base.Clone(cloner);
218      clone.DistanceMatrixParameter.Value = DistanceMatrixParameter.Value;
219      clone.Initialize();
220      return clone;
221    }
222
223    private static double CalculateDistance(int start, int end, DoubleMatrix coordinates) {
224      double distance = 0.0;
225
226      distance =
227          Math.Sqrt(
228            Math.Pow(coordinates[start, 0] - coordinates[end, 0], 2) +
229            Math.Pow(coordinates[start, 1] - coordinates[end, 1], 2));
230
231      return distance;
232    }
233
234    private static DoubleMatrix CreateDistanceMatrix(DoubleMatrix coordinates) {
235      DoubleMatrix distanceMatrix = new DoubleMatrix(coordinates.Rows, coordinates.Rows);
236
237      for (int i = 0; i < distanceMatrix.Rows; i++) {
238        for (int j = i; j < distanceMatrix.Columns; j++) {
239          double distance = CalculateDistance(i, j, coordinates);
240
241          distanceMatrix[i, j] = distance;
242          distanceMatrix[j, i] = distance;
243        }
244      }
245
246      return distanceMatrix;
247    }
248
249    public static double GetDistance(int start, int end,
250      DoubleMatrix coordinates, ILookupParameter<DoubleMatrix> distanceMatrix, BoolValue useDistanceMatrix) {
251      double distance = 0.0;
252
253      if (useDistanceMatrix.Value) {
254        if (distanceMatrix.ActualValue == null) {
255          distanceMatrix.ActualValue = CreateDistanceMatrix(coordinates);
256        }
257
258        distance = distanceMatrix.ActualValue[start, end];
259      } else {
260        distance = CalculateDistance(start, end, coordinates);
261      }
262
263      return distance;
264    }
265
266    public static double GetDistance(int start, int end,
267      DoubleMatrix coordinates, DoubleMatrix distanceMatrix, BoolValue useDistanceMatrix) {
268      double distance = 0.0;
269
270      if (useDistanceMatrix.Value) {
271        distance = distanceMatrix[start, end];
272      } else {
273        distance = CalculateDistance(start, end, coordinates);
274      }
275
276      return distance;
277    }
278
279    public void ImportFromSolomon(string solomonFileName) {
280      SolomonParser parser = new SolomonParser(solomonFileName);
281      parser.Parse();
282
283      this.Name = parser.ProblemName;
284
285      Coordinates = new DoubleMatrix(parser.Coordinates);
286      Vehicles.Value = parser.Vehicles;
287      Capacity.Value = parser.Capacity;
288      Demand = new DoubleArray(parser.Demands);
289      ReadyTime = new DoubleArray(parser.Readytimes);
290      DueTime = new DoubleArray(parser.Duetimes);
291      ServiceTime = new DoubleArray(parser.Servicetimes);
292
293      OnReset();
294    }
295
296    #region Events
297    public event EventHandler SolutionCreatorChanged;
298    private void OnSolutionCreatorChanged() {
299      EventHandler handler = SolutionCreatorChanged;
300      if (handler != null) handler(this, EventArgs.Empty);
301    }
302    public event EventHandler EvaluatorChanged;
303    private void OnEvaluatorChanged() {
304      EventHandler handler = EvaluatorChanged;
305      if (handler != null) handler(this, EventArgs.Empty);
306    }
307    public event EventHandler OperatorsChanged;
308    private void OnOperatorsChanged() {
309      EventHandler handler = OperatorsChanged;
310      if (handler != null) handler(this, EventArgs.Empty);
311    }
312    public event EventHandler Reset;
313    private void OnReset() {
314      EventHandler handler = Reset;
315      if (handler != null) handler(this, EventArgs.Empty);
316    }
317    void VehiclesValue_ValueChanged(object sender, EventArgs e) {
318      ParameterizeSolutionCreator();
319    }
320    private void CoordinatesParameter_ValueChanged(object sender, EventArgs e) {
321      Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
322      Coordinates.Reset += new EventHandler(Coordinates_Reset);
323      ParameterizeSolutionCreator();
324      ClearDistanceMatrix();
325    }
326    private void Coordinates_ItemChanged(object sender, EventArgs<int, int> e) {
327      ClearDistanceMatrix();
328    }
329    private void Coordinates_Reset(object sender, EventArgs e) {
330      ParameterizeSolutionCreator();
331      ClearDistanceMatrix();
332    }
333    private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
334      ParameterizeSolutionCreator();
335      ParameterizeEvaluator();
336      ParameterizeAnalyzer();
337      ParameterizeOperators();
338      OnSolutionCreatorChanged();
339    }
340    private void SolutionCreator_PermutationParameter_ActualNameChanged(object sender, EventArgs e) {
341      ParameterizeEvaluator();
342      ParameterizeAnalyzer();
343      ParameterizeOperators();
344    }
345    private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
346      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
347      ParameterizeEvaluator();
348      UpdateMoveEvaluators();
349      ParameterizeAnalyzer();
350      //UpdateDistanceMatrix();
351      OnEvaluatorChanged();
352    }
353    private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
354      ParameterizeAnalyzer();
355    }
356    void TranslocationMoveParameter_ActualNameChanged(object sender, EventArgs e) {
357      string name = ((ILookupParameter<TranslocationMove>)sender).ActualName;
358      foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>()) {
359        op.TranslocationMoveParameter.ActualName = name;
360      }
361    }
362    #endregion
363
364    #region Helpers
365    [StorableHook(HookType.AfterDeserialization)]
366    private void Initialize() {
367      InitializeOperators();
368      CoordinatesParameter.ValueChanged += new EventHandler(CoordinatesParameter_ValueChanged);
369      Vehicles.ValueChanged += new EventHandler(VehiclesValue_ValueChanged);
370      Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
371      Coordinates.Reset += new EventHandler(Coordinates_Reset);
372      SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
373      EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
374      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
375    }
376    private void InitializeOperators() {
377      operators = new List<IOperator>();
378      operators.Add(new BestVRPSolutionAnalyzer());
379      ParameterizeAnalyzer();
380      operators.AddRange(ApplicationManager.Manager.GetInstances<IVRPOperator>().Cast<IOperator>());
381      ParameterizeOperators();
382      UpdateMoveEvaluators();
383      InitializeMoveGenerators();
384    }
385    private void InitializeMoveGenerators() {
386      foreach (IAlbaTranslocationMoveOperator op in Operators.OfType<IAlbaTranslocationMoveOperator>()) {
387        if (op is IMoveGenerator) {
388          op.TranslocationMoveParameter.ActualNameChanged += new EventHandler(TranslocationMoveParameter_ActualNameChanged);
389        }
390      }
391
392    }
393    private void UpdateMoveEvaluators() {
394      ParameterizeOperators();
395      OnOperatorsChanged();
396    }
397    private void ParameterizeSolutionCreator() {
398      SolutionCreator.CitiesParameter.Value = new IntValue(Coordinates.Rows - 1);
399      SolutionCreator.VehiclesParameter.ActualName = VehiclesParameter.Name;
400      SolutionCreator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
401      Evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
402      Evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
403      SolutionCreator.CapacityParameter.ActualName = CapacityParameter.Name;
404      SolutionCreator.DemandParameter.ActualName = DemandParameter.Name;
405      SolutionCreator.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
406      SolutionCreator.DueTimeParameter.ActualName = DueTimeParameter.Name;
407      SolutionCreator.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
408    }
409    private void ParameterizeEvaluator() {
410      Evaluator.VRPSolutionParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
411      Evaluator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
412      Evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
413      Evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
414      Evaluator.VehiclesParameter.ActualName = VehiclesParameter.Name;
415      Evaluator.CapacityParameter.ActualName = CapacityParameter.Name;
416      Evaluator.DemandParameter.ActualName = DemandParameter.Name;
417      Evaluator.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
418      Evaluator.DueTimeParameter.ActualName = DueTimeParameter.Name;
419      Evaluator.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
420      Evaluator.FleetUsageFactor.ActualName = FleetUsageFactor.Name;
421      Evaluator.TimeFactor.ActualName = TimeFactor.Name;
422      Evaluator.DistanceFactor.ActualName = DistanceFactor.Name;
423      Evaluator.OverloadPenalty.ActualName = OverloadPenalty.Name;
424      Evaluator.TardinessPenalty.ActualName = TardinessPenalty.Name;
425    }
426    private void ParameterizeAnalyzer() {
427      BestVRPSolutionAnalyzer.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
428      BestVRPSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
429      BestVRPSolutionAnalyzer.DistanceParameter.ActualName = Evaluator.DistanceParameter.ActualName;
430      BestVRPSolutionAnalyzer.OverloadParameter.ActualName = Evaluator.OverloadParameter.ActualName;
431      BestVRPSolutionAnalyzer.TardinessParameter.ActualName = Evaluator.TardinessParameter.ActualName;
432      BestVRPSolutionAnalyzer.VRPSolutionParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
433      BestVRPSolutionAnalyzer.ResultsParameter.ActualName = "Results";
434    }
435    private void ParameterizeOperators() {
436      foreach (IVRPMoveOperator op in Operators.OfType<IVRPMoveOperator>()) {
437        op.VRPSolutionParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
438      }
439      foreach (IVRPMoveEvaluator op in Operators.OfType<IVRPMoveEvaluator>()) {
440        op.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
441        op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
442        op.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
443        op.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
444        op.VRPSolutionParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
445        op.VehiclesParameter.ActualName = VehiclesParameter.Name;
446        op.CapacityParameter.ActualName = CapacityParameter.Name;
447        op.DemandParameter.ActualName = DemandParameter.Name;
448        op.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
449        op.DueTimeParameter.ActualName = DueTimeParameter.Name;
450        op.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
451        op.FleetUsageFactor.ActualName = FleetUsageFactor.Name;
452        op.TimeFactor.ActualName = TimeFactor.Name;
453        op.DistanceFactor.ActualName = DistanceFactor.Name;
454        op.OverloadPenalty.ActualName = OverloadPenalty.Name;
455        op.TardinessPenalty.ActualName = TardinessPenalty.Name;
456      }
457      string translocationMove = Operators.OfType<IMoveGenerator>().OfType<IAlbaTranslocationMoveOperator>().First().TranslocationMoveParameter.ActualName;
458      foreach (IAlbaTranslocationMoveOperator op in Operators.OfType<IAlbaTranslocationMoveOperator>())
459        op.TranslocationMoveParameter.ActualName = translocationMove;
460
461      foreach (IVRPCrossover op in Operators.OfType<IVRPCrossover>()) {
462        op.ParentsParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
463        op.ChildParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
464      }
465      foreach (IVRPManipulator op in Operators.OfType<IVRPManipulator>()) {
466        op.VRPSolutionParameter.ActualName = SolutionCreator.VRPSolutionParameter.ActualName;
467      }
468    }
469    private void ClearDistanceMatrix() {
470      DistanceMatrixParameter.Value = null;
471    }
472    #endregion
473  }
474}
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