source: branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Manipulators/RelocateEquipmentManipluator.cs @ 15564

Last change on this file since 15564 was 15564, checked in by abeham, 2 years ago

#1614:

  • Fixed some bugs
  • Added OSGA
  • Updated ES (added recombination)
  • Reusing operators among algorihtms (RelocateEquipmentManipluator)
  • Rewrote DiscreteLocationCrossover
File size: 2.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2017 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.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Encodings.IntegerVectorEncoding;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28using HeuristicLab.Random;
29
30namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment {
31
32  [Item("RelocateEquipmentManipluator", "Relocates a random equipment from an overstuffed location to a random one with space or a random equipment if constraints are satisfied.")]
33  [StorableClass]
34  public class RelocateEquipmentManipluator : GQAPManipulator {
35   
36    [StorableConstructor]
37    protected RelocateEquipmentManipluator(bool deserializing) : base(deserializing) { }
38    protected RelocateEquipmentManipluator(RelocateEquipmentManipluator original, Cloner cloner) : base(original, cloner) { }
39    public RelocateEquipmentManipluator()
40      : base() {
41    }
42
43    public override IDeepCloneable Clone(Cloner cloner) {
44      return new RelocateEquipmentManipluator(this, cloner);
45    }
46
47    public static void Apply(IRandom random, IntegerVector assignment, int locations, double stopProb) {
48      if (locations < 2) throw new InvalidOperationException("There are not enough locations for relocation operations.");
49
50      var equipments = Enumerable.Range(0, assignment.Length).Shuffle(random);
51      foreach (var equipment in equipments) {
52        var oldLoc = assignment[equipment];
53        var newLoc =random.Next(locations - 1);
54        if (newLoc >= oldLoc) newLoc++; // don't reassign to current loc
55        assignment[equipment] = newLoc;
56        if (random.NextDouble() < stopProb) break;
57      }
58    }
59
60    protected override void Manipulate(IRandom random, IntegerVector vector, GQAPInstance problemInstance) {
61      Apply(random, vector, problemInstance.Capacities.Length, 4.0 / problemInstance.Demands.Length);
62    }
63  }
64}
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