A novel Laser screen velocity measuring method with large effective screen area is introduced for some special velocity measuring occasions like wide spreading range or big-size flying objects.

针对弹道散布范围大或被测飞行物体尺寸大的测速场合，介绍了一种实现大面积有效靶区激光光幕速度测量的方法。

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The method of stack velocity analysis based on relief surface presented in the paper uses double-square-root equation to compute the travel time of reflections, which is suitable to use in the area w.

本文提出的基于起伏地表的叠加速度分析方法，应用双平方根方程计算反射波的旅行时间，可适用于地形起伏剧烈地区。

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The error caused by the ring method of equivalent area to measure the mean velocity of the circular pipe is studied by the different now pattern.

根据不同流型讨论了等面积圆环法确定断面平均流速时所产生的误差。

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