source: trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/ParticleOperators/RealVectorTotallyConnectedParticleUpdater.cs @ 5866

Last change on this file since 5866 was 5866, checked in by epitzer, 11 years ago
  • Remove superfluous placeholders
  • Hide ParticleUpdater
  • Add CurrentVelocityBounds parameter analogous to CurrentInertia
  • Add (Current)VelocityBounds to results
  • Merge VelocityBoundsModifier directly into SwarmUpdater (#852)
File size: 3.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Optimization;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Encodings.RealVectorEncoding {
28  [Item("Totally Connected Particle Updater", "Updates the particle's position using (among other things) the global best position. Use together with the empty topology initialzer. Point = Point + Velocity*Inertia + (PersonalBestPoint-Point)*Phi_P*r_p + (BestPoint-Point)*Phi_G*r_g")]
29  [StorableClass]
30  public sealed class RealVectorTotallyConnectedParticleUpdater : RealVectorParticleUpdater, IGlobalParticleUpdater {
31
32    #region Construction & Cloning
33    [StorableConstructor]
34    private RealVectorTotallyConnectedParticleUpdater(bool deserializing) : base(deserializing) { }
35    private RealVectorTotallyConnectedParticleUpdater(RealVectorTotallyConnectedParticleUpdater original, Cloner cloner) : base(original, cloner) { }
36    public RealVectorTotallyConnectedParticleUpdater() : base() { }
37    public override IDeepCloneable Clone(Cloner cloner) {
38      return new RealVectorTotallyConnectedParticleUpdater(this, cloner);
39    }
40    #endregion
41
42    public override IOperation Apply() {
43      double inertia = Inertia.Value;
44      double personalBestAttraction = PersonalBestAttraction.Value;
45      double neighborBestAttraction = NeighborBestAttraction.Value;
46
47      RealVector velocity = new RealVector(Velocity.Length);
48      RealVector position = new RealVector(RealVector.Length);
49      double r_p = Random.NextDouble();
50      double r_g = Random.NextDouble();
51
52      for (int i = 0; i < velocity.Length; i++) {
53        velocity[i] =
54          Velocity[i] * inertia +
55          (PersonalBest[i] - RealVector[i]) * personalBestAttraction * r_p +
56          (BestPoint[i] - RealVector[i]) * neighborBestAttraction * r_g;
57      }
58
59      BoundsChecker.Apply(velocity, CurrentVelocityBounds);
60      for (int i = 0; i < velocity.Length; i++) {
61        position[i] = RealVector[i] + velocity[i];
62      }
63      BoundsChecker.Apply(position, Bounds);
64
65      RealVector = position;
66      Velocity = velocity;
67
68      return base.Apply();
69    }
70  }
71}
Note: See TracBrowser for help on using the repository browser.