calc_activ_func_deriv 1860 apps/traincascade/old_ml.hpp     virtual void calc_activ_func_deriv( CvMat* xf, CvMat* deriv, const double* bias ) const;
calc_activ_func_deriv  807 modules/ml/src/ann_mlp.cpp                 calc_activ_func_deriv( x2, _df, weights[i] );
calc_activ_func_deriv  920 modules/ml/src/ann_mlp.cpp                     ann->calc_activ_func_deriv( x2, _df, ann->weights[i] );