//method to update linear increasing velocity
public void Update_LinearIncreasingVelocity(Particle gbest, double wt)
{
double r1, r2, fi1, fi2;
for (int i = 0; i < this.numberOfGenes; i++)
{
RandomNumGenerator generator = new RandomNumGenerator();
r1 = generator.Generate_Double();
r2 = generator.Generate_Double();
fi1 = 1.5 * r1 + 0.5;
fi2 = 1.5 * r2 + 0.5;
double factor1 = fi1 * (this.pbest[i] - this.genes[i]);
double factor2 = fi2 * (gbest.genes[i] - this.genes[i]);
double factor3 = this.velocity[i] * wt;
this.velocity[i] = factor1 + factor2 + factor3;
//complete equation for velocity update
//this.velocity[i] = this.velocity[i] * wt + (fi1 * (this.pbest[i] - this.genes[i]) + fi2 * (gbest.genes[i] - this.genes[i]));
//clamping positive velocity if it is out of range
if (this.velocity[i] > this.posClampVelocity)
{
this.velocity[i] = this.posClampVelocity;
}
//clamping negative velocity if it is out of range
if (this.velocity[i] < this.negClampVelocity)
{
this.velocity[i] = this.negClampVelocity;
}
}
}
public void Update_LinearDecreasingVelocity(Particle gbest, double wt)
{
int c1 = 2;
int c2 = 2;
double r1, r2;
for (int i = 0; i < this.numberOfGenes; i++)
{
RandomNumGenerator generator = new RandomNumGenerator();
r1 = generator.Generate_Double();
r2 = generator.Generate_Double();
this.velocity[i] = this.velocity[i] * wt + ((c1 * r1 * (this.pbest[i] - this.genes[i])) + (c2 * r2 * (gbest.genes[i] - this.genes[i])));
//clamping positive velocity if it is out of range
if (this.velocity[i] > this.posClampVelocity)
{
this.velocity[i] = this.posClampVelocity;
}
//clamping negative velocity if it is out of range
if (this.velocity[i] < this.negClampVelocity)
{
this.velocity[i] = this.negClampVelocity;
}
}
}
public RosenbrockParticle(int lowerRange, int higherRange, int posClampVelocity, int negClampVelocity, int numberOfTimeSteps)
{
this.lowerRange = lowerRange;
this.higherRange = higherRange;
this.posClampVelocity = posClampVelocity;
this.negClampVelocity = negClampVelocity;
this.numberOfTimeSteps = numberOfTimeSteps;
RandomNumGenerator rand = new RandomNumGenerator();
//initializing genes and velocity values
for (int i = 0; i < 10; i++)
{
double number = rand.Generate_Double(this.lowerRange, this.higherRange);
this.genes.Add(number);
this.velocity.Add(0);
}
this.numberOfGenes = this.genes.Count;
//initializing pbest list with the initial genes values
for (int i = 0; i < this.numberOfGenes; i++)
{
this.pbest.Add(this.genes[i]);
}
//initializing bestFitness
this.bestFitness = this.CalculateFitness();
}