private ScatterSearch CreateScatterSearchVRPSample()
{
#region Problem Configuration
var provider = new SolomonInstanceProvider();
var instance = provider.GetDataDescriptors().Single(x => x.Name == "C101");
VehicleRoutingProblem vrpProblem = new VehicleRoutingProblem();
vrpProblem.Load(provider.LoadData(instance));
#endregion
#region Algorithm Configuration
ScatterSearch ss = new ScatterSearch();
ss.Engine = new SequentialEngine.SequentialEngine();
ss.Name = "Scatter Search - VRP";
ss.Description = "A scatter search algorithm which solves the \"C101\" vehicle routing problem (imported from Solomon)";
ss.Problem = vrpProblem;
var improver = ss.Problem.Operators.OfType <VRPIntraRouteImprovementOperator>().First();
improver.ImprovementAttemptsParameter.Value.Value = 15;
improver.SampleSizeParameter.Value.Value = 10;
ss.Improver = improver;
var pathRelinker = ss.Problem.Operators.OfType <VRPPathRelinker>().First();
pathRelinker.IterationsParameter.Value.Value = 25;
ss.PathRelinker = pathRelinker;
var similarityCalculator = ss.SimilarityCalculatorParameter.ValidValues.OfType <VRPSimilarityCalculator>().First();
ss.SimilarityCalculator = similarityCalculator;
ss.MaximumIterations.Value = 2;
ss.PopulationSize.Value = 20;
ss.ReferenceSetSize.Value = 10;
ss.Seed.Value = 0;
return(ss);
#endregion
}
