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/// ------------------------------------------------------
/// SwarmOps - Numeric and heuristic optimization for C#
/// Copyright (C) 2003-2011 Magnus Erik Hvass Pedersen.
/// Please see the file license.txt for license details.
/// SwarmOps on the internet: http://www.Hvass-Labs.org/
/// ------------------------------------------------------
using System.Diagnostics;
using System.Threading;
namespace SwarmOps.Problems
{
/// <summary>
/// Sphere benchmark problem with thread-sleeping to simulate a time-consuming
/// problem.
/// </summary>
public class SphereSleep : Sphere
{
#region Constructors.
/// <summary>
/// Construct the object.
/// </summary>
/// <param name="dimensionality">Dimensionality of the problem (e.g. 20)</param>
/// <param name="maxIterations">Max optimization iterations to perform.</param>
public SphereSleep(int sleepMilliSeconds, int dimensionality, int maxIterations)
: base(dimensionality, maxIterations)
{
SleepMilliSeconds = sleepMilliSeconds;
}
#endregion
#region Public properties.
/// <summary>
/// Sleep-time in milli-seconds after each fitness evaluation.
/// </summary>
public int SleepMilliSeconds
{
get;
protected set;
}
#endregion
#region Base-class overrides.
/// <summary>
/// Name of the optimization problem.
/// </summary>
public override string Name
{
get { return "SphereSleep"; }
}
/// <summary>
/// Compute and return fitness for the given parameters.
/// </summary>
/// <param name="x">Candidate solution.</param>
public override double Fitness(double[] x)
{
Debug.Assert(x != null && x.Length == Dimensionality);
double value = 0;
for (int i = 0; i < Dimensionality; i++)
{
double elm = x[i];
value += elm * elm;
}
Thread.Sleep(SleepMilliSeconds);
return value;
}
#endregion
}
}
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