First, grating is projected on measured free surface, and height data of each point on free surface is measured by the grating projection method.
首先将矩形光栅投影在被测表面上，利用光栅投影法测量自由曲面上每点高度信息。
The amplitude distribution of narrow hand semiconductor noise in junction type OC70, OC71 and point contact type 2N32A transistors were measured experimentally by the "maximum amplitude" method.
本文中描述用振幅峰值的方法，测量面接触型晶体管OC70，OC71和点接触型晶体管2N32A内窄频带低频率噪声的振幅分布。
The amplitude-frequency characteristics measured by means of frequency sweeping are dynamic characteristics and those measured by means of point-to-point method are static characteristics.
用扫频法快速测量各种系统的幅频特性是动态特性，按逐点描绘法取得的幅频特性是静态特性。
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