This article analyzed the creep of concrete filled steel tube based on the finite element progressive analysis method and direct superposition of the concrete\'s creep stiffness and the tube\'s stiffness.

According to principle of progressively statistics discriminatory by Distance rule, the authors analysed the data about 100-plant-egg amount of the second generation of the corn borer in 10 years of 1985～1994 at Jiaonian City, Shandong Province, and then deduced four discriminatory models.

ccording to principle of progressively two-grade discriminatory by Fisher rule,the authors analyse the data about the occurrence of the second generation of the corn borer in 21 years of 1965～1986(except 1980)at Linyi,Shandong Province,and then deduce three mathematical models of progressively two-grade discriminatory.

The application of the stepwise regression program of EViews6 in the teaching of multi-collinearity

Study methods were as follows: rapid determination of alcohol content in beer by FT-NIR 750～2500 nm with stepwise regression, and the forecast of FT-NIR were compared with the capacity determined by GC.

In order to study μs-order pulse current ECM polishing(PECP) using the orthographic experimental method, a mathematical model and an input-output model of network have been created from the data obtained from experiments by the method of stepwise regression and the method of artificial Neural Network.