/** EvaluateConstraints() method */
@Override
public void evaluateConstraints(DoubleSolution solution) {
double[] constraint = new double[this.getNumberOfConstraints()];
double x1, x2, x3, x4, x5, x6;
x1 = solution.getVariableValue(0);
x2 = solution.getVariableValue(1);
x3 = solution.getVariableValue(2);
x4 = solution.getVariableValue(3);
x5 = solution.getVariableValue(4);
x6 = solution.getVariableValue(5);
constraint[0] = (x1 + x2) / 2.0 - 1.0;
constraint[1] = (6.0 - x1 - x2) / 6.0;
constraint[2] = (2.0 - x2 + x1) / 2.0;
constraint[3] = (2.0 - x1 + 3.0 * x2) / 2.0;
constraint[4] = (4.0 - (x3 - 3.0) * (x3 - 3.0) - x4) / 4.0;
constraint[5] = ((x5 - 3.0) * (x5 - 3.0) + x6 - 4.0) / 4.0;
double overallConstraintViolation = 0.0;
int violatedConstraints = 0;
for (int i = 0; i < getNumberOfConstraints(); i++) {
if (constraint[i] < 0.0) {
overallConstraintViolation += constraint[i];
violatedConstraints++;
}
}
overallConstraintViolationDegree.setAttribute(solution, overallConstraintViolation);
numberOfViolatedConstraints.setAttribute(solution, violatedConstraints);
}
@Override
public void evaluate(DoubleSolution solution) {
solution.setObjective(0, (1.0 + g(solution)) * solution.getVariableValue(0));
if (solution.getObjective(0) < 0.05) {
solution.setObjective(1, (1.0 + g(solution)) * (1.0 - 19.0 * solution.getVariableValue(0)));
} else {
solution.setObjective(
1, (1.0 + g(solution)) * (1.0 / 19.0 - solution.getVariableValue(0) / 19.0));
}
}
private double g(DoubleSolution solution) {
double result = 0.0;
for (int i = 1; i < solution.getNumberOfVariables(); i++) {
double value =
solution.getVariableValue(i)
- Math.sin(
2 * Math.PI * solution.getVariableValue(0)
+ i * Math.PI / solution.getNumberOfVariables());
result += value * value;
}
return result;
}
/** Evaluate() method */
@Override
public void evaluate(DoubleSolution solution) {
double[] fx = new double[getNumberOfObjectives()];
double x1, x2, x3, x4, x5, x6;
x1 = solution.getVariableValue(0);
x2 = solution.getVariableValue(1);
x3 = solution.getVariableValue(2);
x4 = solution.getVariableValue(3);
x5 = solution.getVariableValue(4);
x6 = solution.getVariableValue(5);
fx[0] =
-(25.0 * (x1 - 2.0) * (x1 - 2.0)
+ (x2 - 2.0) * (x2 - 2.0)
+ (x3 - 1.0) * (x3 - 1.0)
+ (x4 - 4.0) * (x4 - 4.0)
+ (x5 - 1.0) * (x5 - 1.0));
fx[1] = x1 * x1 + x2 * x2 + x3 * x3 + x4 * x4 + x5 * x5 + x6 * x6;
solution.setObjective(0, fx[0]);
solution.setObjective(1, fx[1]);
}