Calculation method of initial fire spreading speed was proposed based on temperature curves at experimental course,namely the distance between two thermocouples divided by interval of the highest temperature measured by the two thermocouples.

The acceleration and rate of fire spread are numerically calculated.

The effects of number and size of elements in the contact area in the steady stage of a rolling process as well as the initial velocity of the plate on the finite element analysis were analyzed and reasonable simulation parameters in a rolling process with FEM were attained, which was used to analyze the rolling force regularity of medium plat rolling in one steel work.

The program indicates that the initial velocity is a variable.

Resorting to Runge-kutta method to solve the simply supported axial pre-statically loaded bar s buckling impulse under the half-sin impact load, this paper is to probe into the relationship between buckling impulse, and pre-static load, impact load, initial deflection, initial velocity respectively.