chazhi

用Hanning窗设计线性相位滤波器，绘制幅频和相位特性曲线，并在改变N的值后观察N对滤波器特性的影响及其时域特点。(Hanning window with a linear phase filter design, drawing amplitude frequency and phase characteristic curve, and change the value of N, N were observed on the filter characteristics and time domain characteristics.)

说明：  matlab 面向对象编程 从具体实例出发 详细讲解编程中的问题(matlab object-oriented programming starting from concrete examples to explain in detail the problems in programming)

系统辨识和自适应控制中极点配置直接自矫正控制(Direct from the poles corrective control in System identification and adaptive control)

蒙特卡洛模拟算法，用于三维曲面重构，大型球面镜测量(Monte Carlo simulation algorithm for three-dimensional surface reconstruction, large spherical mirror measurement)

图像处理经典算法，基于PCA的人脸识别matlab代码(Matlab code of face recognition based on PCA)

分数付立业变换函数，MATLAB编写，很方便调用(Score Fourier transform industry function, MATLAB prepared, it is convenient to call)

Dijkstra最短路算法通用Matlab程序(Dijkstra)

matlab数字信号处理，包括基础的信号创建，滤波器的设计，以及系统的构架等基础知识(Matlab digital signal processing, signal includes basic creation, filter design, basic knowledge and system architecture )

substitution cipher is the method of encoding in which unit of plain text are replaced by cipher text. Monoalphabetic cipher uses a fixed message over entire message.A monoalphabetic cipher uses fixed substitution over the entire message.The monoalphabetic substitution takes a letter of an alphabet and substitutes it with another letter, this way a ciphertext is generated. The way of converting is fixed. A character of the plaintext will be replaced by the same ciphertext character, during the entire ciphertext. There is no additional key. The only way of security is to keep the substitution-table secret. A popular example for the monoalphabetic substitution is the caesar cipher.

change from rgb to pgm file, for facial recognition