it s homework1 and homework2

设某信号 , N=20, 其中， 为白噪声。 求: 编程实现信号的DFT及其反DFT变换，画出原始信号、幅频特性和反变换后信号的曲线。 -Let a signal, N = 20, which, for the white noise. Demand: programming signal DFT and its inverse DFT transform, draw the original signal, the amplitude-frequency characteristic

homework2 身份证识别系统的参照源码解释。俄文的。我也看不懂-homework2 is a matlab implementation of cutting numbers and characters on the second generation ID card and identification procedure. this pdf seems like a explain for it. but it is written in Russian.

浙江大学市场营销学Homework2 顾客价值分析 产品价值版块