Based on the characterisitics of the bipolar junction transistors high current and high voltage of collector to emitter in common emitter circuit, this paper proposed a approximate method of drawing dynamic load line suited for C class tuned power amplifier, discussed the variation of the line as the offset voltage of collector to emitter or base to emitter changed.

In this Paper, we measured the gas thermal conductivity of pure and TiO2 doped silica aerogels at low pressure (<105Pa) by using the transient hot wire method, and researched the affection of the dopant on the gas thermalconductivity of silica aerogels.

Making use of dynamic curve of process flow index to raise gold recovery rate;

The realization of real-time continuous dynamic curves in VC;

Realization of dynamic curve and data reports in the measuring and control system;

The rectangle window is divided into several parts based on dynamical baseline and additional 45°or 135°baseline.

A fast pyrometer with wide dynamic linearity for shock temperature measurements

A dynamic linearity model of the giant magnetostrictive actuator has been founded,based on the electro-magnetic theory and mechanical vibration principle.