Changeset 15181 for trunk/sources/HeuristicLab.Algorithms.ParticleSwarmOptimization/3.3/ParticleSwarmOptimization.cs

Timestamp:

07/10/17 17:26:43 (7 years ago)

Author:

abeham

Message:

#2797:

• Added IStochasticOperator interface to MultiPSOTopologyUpdater
• Changed parameter defaults to those described in the paper
• Added analyzer placeholder for the last iteration (has not been previously analyzed)
• Changed random topology initializer to include itself (to be able to use it with SPSOSwarmUpdater -> this should not change the old RealVectorSwarmUpdater)
• Changed ring topology initializer to include itself (same as above)
• Changed von neumann topology initializer to include itself (same as above)
• Added SPSO compatible random topology initializer (as described in the paper by Clerc)
• Changed sampling of the random directional vector to be uniformly random on the surface of a hypersphere to avoid a slight bias in diagonal direction
• Updating SwarmBestQuality and BestRealVector parameters in SPSOSwarmUpdater (an oversight)
• Added a faster method to create a copy of a RealVector (based on Array.Copy)
• Updated the sample
• Updated the sample's test results (due to changed sampling in SPSO2011ParticleUpdater)

File:

• trunk/sources/HeuristicLab.Algorithms.ParticleSwarmOptimization/3.3/ParticleSwarmOptimization.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Algorithms.ParticleSwarmOptimization/3.3/ParticleSwarmOptimization.cs

@@ -177 +177 @@
       Parameters.Add(new ValueParameter<IntValue>("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
       Parameters.Add(new ValueParameter<BoolValue>("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
-      Parameters.Add(new ValueParameter<IntValue>("SwarmSize", "Size of the particle swarm.", new IntValue(20)));
+      Parameters.Add(new ValueParameter<IntValue>("SwarmSize", "Size of the particle swarm.", new IntValue(40)));
       Parameters.Add(new ValueParameter<IntValue>("MaxIterations", "Maximal number of iterations.", new IntValue(1000)));
       Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze each generation.", new MultiAnalyzer()));
-      Parameters.Add(new ValueParameter<DoubleValue>("Inertia", "Inertia weight on a particle's movement (omega).", new DoubleValue(0.8)));
+      Parameters.Add(new ValueParameter<DoubleValue>("Inertia", "Inertia weight on a particle's movement (omega).", new DoubleValue(0.721)));
       Parameters.Add(new ValueParameter<DoubleValue>("PersonalBestAttraction", "Weight for particle's pull towards its personal best soution (phi_p).", new DoubleValue(1)));
       Parameters.Add(new ValueParameter<DoubleValue>("NeighborBestAttraction", "Weight for pull towards the neighborhood best solution or global best solution in case of a totally connected topology (phi_g).", new DoubleValue(1)));