public IChromosome Mutate(IChromosome chromosome)
{
var genes = chromosome as DoubleVectorChromosome;
var length = genes.Genes.Length;
var mutationProbability = ParameterSet.GetValue(ParameterNames.MutationProbability);
var mutationIntensity = ParameterSet.GetValue(ParameterNames.MutationIntensity);
int blockSize = ParameterSet.GetInt(ParameterNames.BlockSize);
int relPos = Random.GetInt(0, blockSize);
double modification = Random.GetGaussian(0, mutationIntensity);
for (int block = 0; block < length / blockSize; block++)
{
var rnd = Random.GetDouble(0, 1);
if (rnd < mutationProbability)
{
var position = blockSize * block + relPos;
var gene = genes.Genes[position];
gene += modification;
genes.Genes[position] = gene;
}
}
return(genes);
}
public IChromosome Mutate(IChromosome chromosome)
{
var genes = chromosome as DoubleVectorChromosome;
var length = genes.Genes.Length;
var mutationIntensity = ParameterSet.GetValue(ParameterNames.MutationIntensity);
int blockSize = ParameterSet.GetInt(ParameterNames.BlockSize);
int relPos = Random.GetInt(0, blockSize);
double modification = Random.GetGaussian(0, mutationIntensity);
for (int block = 0; block < length / blockSize; block++)
{
for (int position = 0; position < blockSize; position++)
{
var gene = genes.Genes[blockSize * block + position];
if (position == relPos)
{
gene += modification;
}
genes.Genes[blockSize * block + position] = gene;
}
}
return(genes);
}
public IChromosome Mutate(IChromosome chromosome)
{
var genes = chromosome as DoubleVectorChromosome;
var length = genes.Genes.Length;
var mutationIntensity = ParameterSet.GetValue(ParameterNames.MutationIntensity);
var position = Random.GetInt(0, length);
var oldValue = genes.Genes[position];
var newValue = Random.GetGaussian(oldValue, mutationIntensity);
genes.Genes[position] = newValue;
return(chromosome);
}
IEntityList SelectWithHashSet(IEntityList entities, int count)
{
HashSet <IEntity> result = new HashSet <IEntity>();
var tournamentSize = Convert.ToInt32(ParameterSet.GetValue(ParameterNames.TournamentSize));
for (int i = 0; i < count; i++)
{
var selected = SelectOne(entities, tournamentSize);
while (result.Contains(selected))
{
selected = SelectOne(entities, tournamentSize);
}
result.Add(selected);
}
return(new EntityList(result));
}
public IChromosome Mutate(IChromosome chromosome)
{
var genes = chromosome as DoubleVectorChromosome;
var length = genes.Genes.Length;
var mutationIntensity = ParameterSet.GetValue(ParameterNames.MutationIntensity);
int blockSize = ParameterSet.GetInt(ParameterNames.BlockSize);
var block = Random.GetInt(0, length / blockSize);
for (int position = block * blockSize; position < (block + 1) * blockSize - 1; position++)
{
var oldValue = genes.Genes[position];
var newValue = Random.GetGaussian(oldValue, mutationIntensity);
genes.Genes[position] = newValue;
}
return(chromosome);
}
public override IEntityList Select(IEntityList entities, int count)
{
if (count == 1)
{
var tournamentSize = Convert.ToInt32(ParameterSet.GetValue(ParameterNames.TournamentSize));
var selected = SelectOne(entities, tournamentSize);
var entityList = new EntityList(1);
entityList.Add(selected);
return(entityList);
}
//else if (count < 20)
//{
return(SelectWithList(entities, count));
//}
//else
//{
// return SelectWithHashSet(entities, count);
//}
}
public IChromosome Mutate(IChromosome chromosome)
{
var genes = chromosome as DoubleVectorChromosome;
var length = genes.Genes.Length;
var mutationProbability = ParameterSet.GetValue(ParameterNames.MutationProbability);
var mutationIntensity = ParameterSet.GetValue(ParameterNames.MutationIntensity);
for (int i = 0; i < length; i++)
{
var rnd = Random.GetDouble(0, 1);
if (rnd < mutationProbability)
{
var gene = genes.Genes[i];
gene = Random.GetGaussian(gene, mutationIntensity);
genes.Genes[i] = gene;
}
}
return(genes);
}