其次，使用由FFT快速傅立叶分析仪、激光传感器等组成的检测系统，进行了激光传感器对木材表面粗糙度定量测量方法的研究和木材表面缺陷识别的研究。
Secondly, laser sensor quantitative measure wood surface roughness method and wood surface defect recognition are studied by the test system consisting of FFT analyzer, laser sensor etc.
应用快速傅立叶变换方法对脉搏信号进行了分析。
The pulse signals were processed by using the fast Fourier transforms.
你可能会问，我们为什么不像傅立叶变换用无限长的窗口一样，而在快速傅立叶变换中却用有限长的窗口进行分析呢？
You may ask, why don't we make the length of the window in the STFT infinite, just like as it is in the FT, to get perfect frequency resolution?
应用推荐