final boolean isNuFixed[] = {true, false};
final boolean isRhoFixed[] = {true, false};
final double calibrationTolerance = 5.0e-8;
// initialize optimization methods
final OptimizationMethod methods[] = new OptimizationMethod[2];
methods[0] = new Simplex(0.01);
methods[1] = new LevenbergMarquardt(1e-8, 1e-8, 1e-8);
// Initialize end criteria
final EndCriteria endCriteria = new EndCriteria(100000, 100, 1e-8, 1e-8, 1e-8);