According to the observation file of control network,one is the step by step back substitution algorithm,with which a set of least independent close loops in control network can be produced automatically.

We take the correct rate of back substitution as a standard, and use the combinatorial factor to establish Fisher distinguishing equation.

Influence relationship between clothing structure designing math model positions in stepwise regression;

Predicting the properties of aliphatic alcohols in stepwise regression;

Rapid differential diagnosis of thalassemia trait and iron-deficiency anemia with stepwise regression analysis;