The mechanism of shockformation apparently changes, too, at these altitudes so that the scaling laws are no longer applicable.
在这个高度下，冲击形成的机制也有很明显的改变，所以递增公式也就不再适用了。
2
The shockformation in a nonlinear ultrasound beam by solving KZK equation using frequency-domain numerical method is investigated.
通过用频域方法数值求解KZK方程； 以活塞声场为例，研究了非线性超声束的冲击波形成规律。
3
The results reveal that besides the nonlinearity and absorption, the diffraction is another important factor that affects the shockformation of an ultrasound beam.