public Particle(Swarm swarm)
{
//_random = new Random ();
_swarm = swarm;
_currentPosition = GetInitPosition(swarm);
_localBestPosition = (double[])_currentPosition.Clone();
_localBestFinalFunc = swarm.FinalFunction(_currentPosition);
_velocity = GetInitVelocity(swarm);
}
public static string ResultToString(Swarm swarm)
{
StringBuilder builder = new StringBuilder ();
builder.AppendFormat ("Iteration: {0}\n\n", swarm.Iteration);
if (swarm.BestPosition != null)
{
for (int i = 0; i < swarm.Dimension; i++)
{
builder.AppendFormat ("X[{0}] = {1}\n", i, swarm.BestPosition[i]);
}
builder.AppendFormat ("\nFinal function: {0}\n", swarm.BestFinalFunc);
}
builder.Append ("-----------\n\n");
return builder.ToString ();
}
/// <summary>
/// Получить начальное значение скорости
/// </summary>
/// <param name="task"></param>
/// <returns></returns>
double[] GetInitVelocity(Swarm swarm)
{
double[] velocity = new double[swarm.Dimension];
for (int i = 0; i < swarm.Dimension; i++)
{
double minval = -(swarm.MaxValues[i] - swarm.MinValues[i]);
double maxval = (swarm.MaxValues[i] - swarm.MinValues[i]);
velocity[i] = _random.NextDouble() * (maxval - minval) + minval;
}
Debug.Assert(velocity.Length == swarm.MinValues.Length);
Debug.Assert(velocity.Length == swarm.MaxValues.Length);
return velocity;
}
double[] GetInitPosition(Swarm swarm)
{
double[] position = new double[swarm.Dimension];
for (int i = 0; i < swarm.Dimension; i++)
{
position[i] = _random.NextDouble() *
(swarm.MaxValues[i] - swarm.MinValues[i]) + swarm.MinValues[i];
}
Debug.Assert(position.Length == swarm.MinValues.Length);
Debug.Assert(position.Length == swarm.MaxValues.Length);
return position;
}