source: trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/ParticleOperators/RealVectorTotallyConnectedParticleUpdater.cs @ 15091

Last change on this file since 15091 was 15091, checked in by abeham, 3 months ago

#2797:

  • Updated PSO to make it more compatible with SPSO 2011
  • Removed truncation of velocity vector and instead rescaled it given the maximum velocity
  • Added non-zero initial velocity according to SPSO 2011
  • Removed complicated bouncing code due to box constraints and instead implemented as described in SPSO 2011
  • Calculating neighbor best has been changed to use personal best
  • Avoiding local and global particle update and instead relying on neighborbest
  • More randomization during velocity update by using a separate random numbers per dimension
  • Reusing problem specific solution creator in RealVectorParticleCreator instead of always using UniformRandomRealVectorCreator
File size: 2.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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 HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Optimization;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27using HeuristicLab.PluginInfrastructure;
28
29namespace HeuristicLab.Encodings.RealVectorEncoding {
30  [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")]
31  [StorableClass]
32  [NonDiscoverableType]
33  [Obsolete("Same as the RealVectorNeighborhoodParticleUpdate")]
34  internal sealed class RealVectorTotallyConnectedParticleUpdater : RealVectorParticleUpdater {
35
36    #region Construction & Cloning
37    [StorableConstructor]
38    private RealVectorTotallyConnectedParticleUpdater(bool deserializing) : base(deserializing) { }
39    private RealVectorTotallyConnectedParticleUpdater(RealVectorTotallyConnectedParticleUpdater original, Cloner cloner) : base(original, cloner) { }
40    public RealVectorTotallyConnectedParticleUpdater() : base() { }
41    public override IDeepCloneable Clone(Cloner cloner) {
42      return new RealVectorTotallyConnectedParticleUpdater(this, cloner);
43    }
44    #endregion
45
46    public override IOperation Apply() {
47      UpdateVelocity();
48      UpdatePosition();
49
50      return base.Apply();
51    }
52  }
53}
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