seed = 5;
StochVars(2,1) = RandomVariable;

for i=1:2
    StochVars(i,1).Name                     = ['U' num2str(i)];
    StochVars(i,1).Distribution             = @norm_inv;
    StochVars(i,1).DistributionParameters   = {0 1};
end

LSF                     = LimitState;
LSF.Name                = 'Z';
LSF.LimitStateFunction  = @prob_gr_05_x2z_test;
LSF.RandomVariables     = StochVars;
LSF.ResponseSurface     = AdaptiveResponseSurface;

LineSearcher            = LineSearch;

DS_gr_05                = DirectionalSampling(LSF,LineSearcher,0.95,0.2,seed);


DS_gr_05.CalculatePf;

cd ..
result = prob_quadratic_RS_concave_test('seed',seed);