傅里叶分析（具体分单边和双边两种傅里叶分析），联合时域分析，帕斯瓦尔定理的验证，信号的边界检测（通过改变信号中所加白噪声的大小来被检测信号），FIR滤波器的设计及效果验证（窗和信号均可改变），IIR滤波器的设计及效果验证（可以使用多种滤波器），web 浏览器的模拟，万年历（可以计算任何日期到当前时间的时间间隔）-(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)