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source: branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Evaluation/Evaluation.cs @ 15553

Last change on this file since 15553 was 15553, checked in by abeham, 6 years ago

#1614:

  • Implementing basic algorithm according to paper (rechecking all operators)
  • Checking implementation with paper
  • Improved speed of move generator
  • Improved speed of randomized solution creator
File size: 3.1 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.Collections.Generic;
23using System.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment {
29  [Item("GQAP Evaluation", "Class that contains the results of evaluating a solution to the GQAP.")]
30  [StorableClass]
31  public class Evaluation : Item {
32
33    /// <summary>
34    /// The solution is feasible if there is no excess demand
35    /// </summary>
36    public bool IsFeasible { get { return ExcessDemand <= double.Epsilon; } }
37
38    /// <summary>
39    /// The amount of demand that exceeds the respective capacities
40    /// </summary>
41    [Storable]
42    public double ExcessDemand { get; private set; }
43    /// <summary>
44    /// The amount of slack at each location, is negative in case of excess demand.
45    /// </summary>
46    /// <remarks>
47    /// Slack.Select(x => x &lt; 0 ? -x : 0).Sum() is equivalent to <see cref="ExcessDemand"/>.
48    /// </remarks>
49    [Storable]
50    private double[] slack;
51    public IReadOnlyList<double> Slack {
52      get { return slack; }
53    }
54    /// <summary>
55    /// The quadratic part of the fitness function that represents the flow or transportation costs.
56    /// </summary>
57    [Storable]
58    public double FlowCosts { get; private set; }
59    /// <summary>
60    /// The linear part of the fitness function that represents the installation costs.
61    /// </summary>
62    [Storable]
63    public double InstallationCosts { get; private set; }
64   
65    [StorableConstructor]
66    protected Evaluation(bool deserializing) : base(deserializing) { }
67    protected Evaluation(Evaluation original, Cloner cloner)
68      : base(original, cloner) {
69      ExcessDemand = original.ExcessDemand;
70      if (original.slack != null)
71        slack = original.slack.ToArray();
72      FlowCosts = original.FlowCosts;
73      InstallationCosts = original.InstallationCosts;
74    }
75    public Evaluation(double flowCosts, double installationCosts, double excessDemand, double[] slack) {
76      FlowCosts = flowCosts;
77      InstallationCosts = installationCosts;
78      ExcessDemand = excessDemand;
79      this.slack = slack;
80    }
81
82    public override IDeepCloneable Clone(Cloner cloner) {
83      return new Evaluation(this, cloner);
84    }
85  }
86}
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