penetrance

Based on the theory of plane electromagnetic wave propagation,the transmission coefficients,the reflection coefficients and the penetration depths are calculated in the case of vertically incident electromagnetic wave with various frequencies on the surface of human body.

从电磁波传播的基础理论出发,对各种频率的平面电磁波在人体表面的反射系数、透射系数及透入深度进行了计算,发现在所计算的频率段内,反射系数均大于透射系数,且频率越低,虽透入深度较高频时增加,但反射系数也增大,这说明很大一部分原始电磁波由于人体表面的反射没有进入人体内。

For an absorbing medium surrounding the optical fiber core,an evanescent wave penetration depth was formulated.

基于光波导理论,分析了单模光纤的渐逝波传输特性,在光纤包层介质具有吸收特性的情况下,导出了渐逝波传输的透入深度公式,得出了单模光纤在轴向上的功率传输情况;讨论了在不同的折射率或消光系数下,渐逝波的透入深度和功率损耗变化特性。

The paper gives the calculated results of current density and depth of penetration, from which we conclude that the conductor with larger r.

同时给出了几种不同导体电流密度及透入深度的计算结果 ,得出了半径较大的圆导体在考虑集肤效应时可当作平面导体来处理的结论 。

The paper explains the skin effect phenomenon and its application in the cable TV signal transmission,emphasis on the analysis of the relation between the depth of penetration and the cable TV signal frequency.

对有线电视信号传输中的趋肤效应现象及其应用作了阐述,着重分析了透入深度与有线电视信号频率两者之间的关系。