public void Initialize()
{
PopulationSizeCalculate();
if (PopulationSize >= 50)
{
ApplyElitism = true;
}
for (int i = 0; i < PopulationSize; i++)//PopulationSize为染色体数
{
GAChromosome newParent = new GAChromosome();
this.Initializer(ref newParent);
newParent.FitnessCalculate();
m_thisGeneration.Add(newParent);
}
TotalFitness.Clear();
RankPopulation(m_thisGeneration);
TotalFitnessRecord();
}//初始化种群
}//对染色体按适应度降序排序
public void CreateNextGeneration()
{
m_nextGeneration.Clear();
GAChromosome bestChromo = null;
if (this.ApplyElitism) //最优秀适应度最好是否直接选择加入到新一代群体
{
bestChromo = m_thisGeneration[0];
}//取出最优染色体(已排序)
for (int i = 0; i < this.PopulationSize; i += 2)
{
//Step1选择
int iDadParent = 0;
int iMumParent = 0;
if (this.Selection == SelectionType.Tournment)//竞争法
{
iDadParent = TournamentSelection();
iMumParent = TournamentSelection();
}
else if (this.Selection == SelectionType.Roullette)//轮赌法
{
iDadParent = RoulletteSelection();
iMumParent = RoulletteSelection();
}
GAChromosome Dad = (GAChromosome)m_thisGeneration[iDadParent];
GAChromosome Mum = (GAChromosome)m_thisGeneration[iMumParent];
GAChromosome child1 = new GAChromosome();
GAChromosome child2 = new GAChromosome();
//Step2交叉
if (m_Random.NextDouble() < this.CrossRate)
{
CrossOver(Dad, Mum, ref child1, ref child2);
}
else
{
child1 = Dad;
child2 = Mum;
}
//Step3变异
if (m_Random.NextDouble() < this.MutationRate)
{
this.Mutation(ref child1);
this.Mutation(ref child2);
}
//Step4计算适应度
child1.FitnessCalculate();
child2.FitnessCalculate();
m_nextGeneration.Add(Dad);
m_nextGeneration.Add(Mum);
m_nextGeneration.Add(child1);
m_nextGeneration.Add(child2);
}
if (null != bestChromo)
{
m_nextGeneration.Add(bestChromo); //最优的染色体插入子代群体中
}
RankPopulation(m_nextGeneration); //按照适应度对染色体排序
m_thisGeneration.Clear(); //用新一代替换当前群体
for (int j = 0; j < this.PopulationSize; j++)
{
m_thisGeneration.Add(m_nextGeneration[j]);
}
TotalFitnessRecord();
this.GenerationNum++;//进化代计数
}//产生下一代种群