The duty ratio was proportional to the surface roughness.

占空比与陶瓷层表面粗糙度成正比；

Combining the two conditions, the duty ratio can be calculated.

联立这两个条件，求解出了占空比的计算公式。

An improved discrete duty ratio control technology is presented.

提出了离散占空比控制技术的改进方案。

Moderate increase of the duty ratio is benefit to the reduction of porosity.

适当提高占空比有利于减少气孔数量。

Wider range output voltage can be realized by varying the duty ratio from 0 to 0.8.

反激逆变器占空比可以在0到0.8之间变化，从而得到较宽范围的输出电压；