direction fluctuation

Way of identifying target based on covariance of bearing fluctuation;

基于方位起伏方差的目标识别方法

Experiments have shown that target bearing fluctuation exists in underwater target echo.

水下目标的特征提取是声自导鱼雷目标识别和分类的基础,本文从水下目标的空间域信息的特征出发,讨论了分裂波束双通道自导系统目标方位提取方法,研究了基于目标方位扩展的水下目标方位起伏特征。

The paper defines a physical parameter—the improving ratio of light intensity undulation variance,and its relation to such parameters as emission aperture,spread distance,aperture space and beam quality,etc.

大气光通信中,对光束质量的描述十分繁琐,本文定义了一个物理参数——光强起伏方差改善比,并通过公式推导,将它与发射孔径、传播距离、孔径间距、光束质量等参数建立了直接联系。