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source: trunk/sources/HeuristicLab.Algorithms.ParticleSwarmOptimization/3.3/TopologyInitializer.cs @ 15526

Last change on this file since 15526 was 15091, checked in by abeham, 7 years 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: 2.3 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Operators;
26using HeuristicLab.Optimization;
27using HeuristicLab.Parameters;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29
30namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
31  [Item("TopologyInitializer", "Groups the particles into neighborhoods according to a certain strategy.")]
32  [StorableClass]
33  public abstract class TopologyInitializer : SingleSuccessorOperator, ITopologyInitializer {
34    public override bool CanChangeName {
35      get { return false; }
36    }
37
38    #region Parameters
39    public IScopeTreeLookupParameter<IntArray> NeighborsParameter {
40      get { return (IScopeTreeLookupParameter<IntArray>)Parameters["Neighbors"]; }
41    }
42    public ILookupParameter<IntValue> SwarmSizeParameter {
43      get { return (ILookupParameter<IntValue>)Parameters["SwarmSize"]; }
44    }
45    #endregion
46
47    #region Construction & Cloning
48    [StorableConstructor]
49    protected TopologyInitializer(bool deserializing) : base(deserializing) { }
50    protected TopologyInitializer(TopologyInitializer original, Cloner cloner) : base(original, cloner) { }
51   
52    public TopologyInitializer() {
53      Parameters.Add(new ScopeTreeLookupParameter<IntArray>("Neighbors", "The list of neighbors for each particle."));
54      Parameters.Add(new LookupParameter<IntValue>("SwarmSize", "Number of particles in the swarm."));
55    }
56    #endregion
57  }
58
59}
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