输入预压、波头、焊接时间、保压、焊接电流等参数。

Input preloading, wave head, welding time, the pressure, welding current parameters.

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电力系统中的VFTO具有几纳秒到几十纳秒的波头。

The VFTO in power system have several or a few nanosecond rise time of surge.

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文章提出了基于检测行波电流波头极性的行波电流极性比较式方向保护。

A directional protection based on traveling wave current polarity comparison which is implemented by detecting the polarity of current wavefront of traveling wave is presented.

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So, we'll take a little bit of a step back after we introduce quantum mechanics, and talk about light as a wave, and the characteristic of waves, and then light as a particle. And one example of this is in the photoelectric effect.

等我们介绍完量子力学后,我们要回过头来讨论下光,作为一种波和它的波动性特征,以及光作为一种粒子,其中的一个粒子就是光电效应。

麻省理工公开课 - 化学原理课程节选