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.

The initial velocity field is more close to the last velocit.

The effect of pressure differences on the initial acceleration of flow,the mean axial velocity component w_m,the flow rate q,the distance of reattachment point z and so on have been discussed.

Automatically building the initial velocity model in the seismic crosshole tomography.;

The paper summed up systematically the major techniques, such as the build-up of initial velocity model, selection of grids and analysis and interpretation of the final near surface model etc.

Using a production area in an oilfield along the northwest margin of Junggar Basin as a case,several problems to influence post-stack seismic inversion,such as mixed-phase wavelet extraction,initial velocity model building and multi-well constraints,are analyzed under different observation times between well log and seismic data.

Particle characteristics in a solid-liquid fluidization system(1): incipient fluidization velocity of particles v_(mf);