rectangular signal

There exists some problems in practical test, i.e. it is hard to measure step force accurately by using force sensor, and it will bring serious errors by replacing the step signal with rectangular pulse.

提出在实际测试中存在的问题：力传感器难以正确测量阶跃力以及利用矩形脉冲代替阶跃进行处理会带来很大的误差。

Sub-frame makes the original signal into a section of the section, Corresponds to the original signal plus a rectangular window in the time domain.

分帧使得原本的信号变成一段一段的，相当于对原始信号时域内加了一个矩形窗。

The effect of Gauss beam waist and imaging lens F, signal light axis offset, length to wide ratio of rectangular detector and signal light axis tilt to heterodyne efficiency have been analyzed and discussed.

分别讨论了高斯光束束腰和成像物镜F数、信号光光轴偏移量、矩形探测器长宽比及信号光光轴倾斜角度对外差效率的影响。

"flag: a piece of cloth, usually rectangular, of distinctive color and design, used as a symbol, a standard, a signal, or an emblem."

“旗，旗帜：一块通常呈长方形的、有特殊颜色和图案的布，用作一种象征、标准、标志或徽章.”