[OptApp] Fixing ProjectForward in Sigmoidal Projection

[RezaNajian]

This is a fast hotfix to the ProjectForward in Sigmoidal Projection.

[sunethwarna]

I think you have to change the derivative also.

Kratos/applications/OptimizationApplication/custom_utilities/control/sigmoidal_projection_utils.cpp

Line 140 in 5235e29

double pow_val = -2.0 * Beta * (xValue - (x1 + x2) / 2) * PenaltyFactor;

I would change one of the following tests also to have PenaltyFactor != 1, so the test fails when the derivative is not changed.

Kratos/applications/OptimizationApplication/tests/test_sigmoidal_projection.py

Lines 117 to 129 in 5235e29

	def test_ComputeFirstDerivative(self):
	test_field = self._GetContainerExpression()
	Kratos.Expression.LiteralExpressionIO.SetData(test_field, 5.5)
	derivative_field = KratosOA.ControlUtils.SigmoidalProjectionUtils.CalculateForwardProjectionGradient(test_field,[1,2,3],[4,5,6],25.0,1)
	self.assertAlmostEqual(Kratos.Expression.Utils.NormInf(derivative_field), 0.0, 4)
	Kratos.Expression.LiteralExpressionIO.SetData(test_field, 2.5)
	derivative_field = KratosOA.ControlUtils.SigmoidalProjectionUtils.CalculateForwardProjectionGradient(test_field,[1,2,3],[4,5,6],25.0,1)
	self.assertAlmostEqual(Kratos.Expression.Utils.NormInf(derivative_field), 12.5, 4)
	Kratos.Expression.LiteralExpressionIO.SetData(test_field, 1.5)
	derivative_field = KratosOA.ControlUtils.SigmoidalProjectionUtils.CalculateForwardProjectionGradient(test_field,[1,2,3],[0,500,600],25.0,1)
	self.assertAlmostEqual(Kratos.Expression.Utils.NormInf(derivative_field), 6250.0, 4)

[sunethwarna]

Thanks @RezaNajian :)