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文中给出实用计算法，以便根据冲击回路参数估算操作波的波头、波尾和电压效率。
A practical calculation method is given. With the parameters of the impulse circuit the wave front and tail and the voltage efficiency can be calculated.
雷电波的视在波头时间和视在波尾时间与理论波头时间和理论波尾时间没有直接的数学关系。
There is not direct mathematical relations among virtual front time, virtual tail time and theoretical front time, theoretical tail time of lightning impulse.
伯努利“水丘”、开尔文尾流、涡尾迹、内波尾迹都起源于潜艇水动力学，对于潜艇的非声探测具有重要的应用意义。
The Bernoulli hump, Kelvin wake, vortex wake and internal wave wake, etc. are generated, as the submarine moves in the ocean. These wake signatures may be used in remote sensing of submarine.
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