并对表面声道中起伏率随距离的变化作了数值计算。
The change of coefficient of variation with range in a surface sound channel was calculated numerically.
本文得到了在波导传播中的无方向性点源的平均声压、平均强度和声信号振幅的起伏率。
The mean pressure, mean intensity, and the coefficient of variation of amplitude of the signal propagated in wave-guide were obtained in this paper.
纽约股市在经历一个星期的震荡起伏后，今天以涨势收盘。星期五早晨美联储宣布降低贴现率是这次反弹的原因。
After a roller-coaster week, Wall Street closed up today. The rebound comes after the Fed cut its key discount rate a half percentage point Friday morning.
窄光束照射流动颗粒系时，透过率会产生起伏。
The transmission signal of a narrow beam irradiated on a flow particle system may fluctuate.
大气折射率起伏主要是由温度和湿度起伏引起的。
The refractive index fluctuation of atmosphere are mainly caused by variations in temperature and humidity.
精确测量大气的折射率起伏，对于研究大气的光学性质及其在环境监测中的应用有着重要的意义。
Exactly measurement of the fluctuation of the atmosphere refractivity is important for the research on the optical property of atmosphere an and it's application on the environment detection.
大气湍流对光波传播的影响主要是由于大气随机起伏的湍流引起折射率的随机起伏，破坏了光波的相干性。
Random fluctuation of turbulence brings random fluctuation of refractive index and makes atmosphere become a random fluctuation medium, which destroys the coherence of light-wave.
精确测量大气的折射率起伏，对于研究大气的光学性质及其在环境监测中的应用有着重要的意义。
Exactly measurement of the fluctuation of the atmosphere refractivity is important for the research on the optical property of atmosphere an and it's application on the environmental detection.
根据湍流的动能和动能耗散率输运方程，建立了折射率起伏方差的计算模型。
Based on turbulent kinetic energy and the rate of turbulent dissipation transport equations, the equation to calculate variance of the refractivity fluctuation is modeled.
在岩心流动试验过程中，注入介质对岩心渗透率的影响必然会引起注入压力出现一定幅度的起伏。
During core flooding test, the influence of the injected medium on core permeability causes injection pressure to fluctuate.
森林覆盖率虽有起伏，但基本稳定在76.8%的较高水平上；
Although forest coverage rose and fell, it generally remained at a level of 76.8%.
目的研究在折射率存在随机起伏的情况下，渐变折射率光纤中光线传播的混沌行为。
AimStudy chaotic behavior of optical rays in a GRIN fiber under random perturbation of refractive index.
透过率起伏信号可用来测量颗粒粒径和浓度。
The fluctuating transmission signal can be used to measure particle size and particle concentration.
透过率起伏信号可用来测量颗粒粒径和浓度。
The fluctuating transmission signal can be used to measure particle size and particle concentration.
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