Based on the theory for coupled vibrations of master-slave systems,by choosing shipboard supercharged boilers and gear cases as research objects,the numerical statistical characteristics of numerical experiments for ship hull and equipment integrated analysis were discussed to determine the anti-shock threshold values of shipboard equipments.

This paper was analysed inspection results of beer bottles around thirteen provinces and areas that were based on 《detailed rules of nationwide unitive inspection of beer bottles》,it was raised that the value of shock resistance of beer bottles is about equal to 0.

Dependence of atmospheric breakdown threshold induced by laser beams on the laser wavelengths;

In terms of chan- ging the microwave frequency and pulse width,the relationship between the air breakdown threshold and altitude above sea level is analyzed,then the relation is simulated numerically and data shown.

Thus a method is obtained to compute the breakdown threshold in liquids.

The effects of air s absorption of heat, scatter, turbulent and thermal blooming on the laser beam transmitting under the air breakdown threshold value are analysed when laser transmit in the air and the result can be used designing of the laser system.