In this paper, a mathematical model is used to characterize this random signals, and a time averaging method is used for obtaining the ultrasonic attenuation coefficient.
本文提供了一种用于识别这类随机信号的数学统计模型，并介绍了一种时间平均法用来获取超声背散射信号的衰减系数。
Along with the increase of the zenith Angle and height above ground of an optical transmitter, the extent of the time-averaging effect decreases.
随着接收终端离地高度和天顶角的增大，大气闪烁时间平滑作用降低。
Along with the increase of the zenith Angle and height above ground of an optical transmitter, the extent of the time-averaging effect decreases.
随着接收终端离地高度和天顶角的增大，大气闪烁时间平滑作用降低。
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