erzhihua

The discrete cosine transform (DCT) is a technique for converting a signal into elementary frequency components. It is widely used in image compression. Here we develop some simple functions to compute the DCT and to compress images. These functions illustrate the power of Mathematica in the prototyping of image processing algorithms. The

说明：  自己做的作业 两个小程序 水印方面的(matlab xiaochengxu)

matlab仿真模型求解系统调节时间，上升时间以及超调量等(matlab simulation model to solve the system settling time, rise time and overshoot, etc.)

comsol 关于光子晶体光纤的程序 仅供大家参考(comsol on photonic crystal fiber program for your reference)

matlab公式文件，用来计算材料中M的含量，在计算材料雪中很大应用。能够为热轧计算提供指导。(The formula of matlab file, used to calculate the material content of M, in the calculation of material widely used in snow. To provide guidance for hot rolling calculation.)

在理想情况下，假设匀速直线行驶，一直杆臂长度，求杆臂速度。(In the ideal case, assuming uniform linear driving, always arm length, and the lever arm speed.)

人提供了一种小波去噪和小波包去噪的对比研究的matlab代码，供大家相互学习和参考(Provide a comparative study of wavelet de-noising and wavelet packet denoising matlab code for everyone to learn from each other and reference)

关于画HHT方法中包络谱和幅值谱的程序，可以精确画出Hilbert包络谱的图像(On painting HHT method in the envelope spectrum and amplitude spectrum procedures, you can accurately draw Hilbert envelope spectrum of the image)

说明：  第2章 Simulink使用基础.ppt 第3章 动态系统模型及其Simulink表示.ppt(Chapter 2 the basis of Simulink use. Ppt Chapter 3 dynamic system model and its Simulink said. Ppt)

System identification