Introduction - If you have any usage issues, please Google them yourself
(The specific stars unilateral and bilateral two Fourier analysis), the joint time-domain analysis, the Pas Val theorem authentication boundary detection signal (signal to be detected by changing the size of the white noise signal to Fourier analysis), FIR filter design and effect verification (window, and the signal can be changed), IIR filter design and effectiveness of verification (you can use a variety of filters), simulation of the web browser, calendar (any date can be calculated to the currentthe time interval)