In chapter two, wave motion equation, sound energy, sound energyfluxdensity, sound intensity and its scaling method and the theorem of two-microphone sound intensity have been introduced.
第二章介绍波动方程、声能、声能流密度、声强及度量方法、双传声器互谱声强测量原理。
2
The density of plasma rises with increase of laser energy, and the charge flux of plasma is larger than that of combustion flow.
实验结果表明等离子体密度随激光能量的提高而增大，而且激光等离子体的电荷通量大于燃烧流的电荷通量。
3
The electron density, the electron -neutral inelastic collision rates, the electron energy and the electron flux distribution are calculated.