Composite second order distortion 复合二次失真
Composite Second Order distortion CSO 组合二次失真
second-order beat distortion 二次差拍失真
With coherent detection, radio frequency (RF) signal can be recovered with simultaneously suppressed second-order distortion and third-order intermodulation.
通过相干检测的方式，可以恢复出不受二阶和三阶干扰的射频信号。
Then, it used second order polynomial to fit the Central Line of text line, and constructed the object function of lens distortion.
然后利用二次多项式模型拟合文本行的中心线，并建立径向失真校正的目标函数。
The second-order harmonic can change the Normalized Impedance of the resonance cavity, and cause the distortion of Frequency Response;
二次谐波可使谐振腔归一化阻抗发生变化，导致强声发生器频率响应曲线失真；
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