This paper is concerned with oscillation property of solutions of a class of second order nonlinear functional differential equations.

This paper is concerned with oscillation property of solutions of a class of second-order nonlinear differential equation with perturbation.

Two new theorems of oscillatory property are established.

The system can reliably diagnose the cause why the vibration quality of a roller bearing is out of standard without too much manual interaction.

Aiming to the actual demand of automatic detecting and classification applying at the back-end of the automatic production line,sensor system,principal axis driving system and vibration quality detecting software have been focused on.

Experimental study on longitudinal vibration characteristics of pendulum assembly in straight hole;

Simulation study on vibration characteristics of low-pressure pulses jet modulator with self-vibration valves;

Study on the transverse vibration characteristics of jackup rig;

Review of research on vibration characteristics and stability of hydro-mechanical-electrical system of hydropower station;

Study on 3D finite element analytic method for vibration characteristics of cooling blade with thermal field;

Analyse of vibration characteristic of clamping system in milling diamond cutting tool;