一个地区的油气层的反射振幅大小是由该区的速度和密度决定的，而这两种物性又取决于岩石的孔隙度和弹性模量。
In an area, reflection amplitude depends on velocity and density, which depend upon the porosity and elastic modulus of rocks.
研究了匹配网络参数不变时，射频电源不同调制模式对反射率的影响。实验研究表明，脉冲宽度调制模式的稳定度要明显高于振幅调制模式。
When the network parameters are kept constant, the results show that the variation of reflection efficiency for PWM mode according to injection power is much less than the am mode's.
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