At the same time this can also show that the derived stochastic optimal control law can be used .

The identification model of this class of time-varying systems and the projection algorithm, stochastic gradient algorithm and forgetting gradient algorithm for this class of TVS is presented by using the gradient search principle.

The auxiliary model stochastic gradient identification algorithm of non-uniformly sampling data system is presented.

By using a frequency complex stochastic gradient algorithm, the speech signal to be transmitted is separated from the mixed speech signal.

Using Copula and Stochastic Gradient Boosting to Analyze the Risk of Mechanical Industries Profit;

Moreover, functional relation, Relevant effect and partial dependence graphics between phytoplankton and each environmental factor can be concluded from survey data about HAB in Baohai by Stochastic Gradient Boosting of Regression Tree, which is essential for the research of cause of HAB and instruction of incubation of thalli.

And the function between the main index and the influential indexes is estimated by such function estimation methods as stochastic gradient Boosting,support vector machine,and multivariate adaptive regression splines.