chap9

This is the file that included gaussian function which generate a gassian variables.

Creates a sinewave in matlab. Can be used to creates waves to test filters

利用差分进化算法（Differential Evolution）实现对经典函数sphere的验证(The use of differential evolution algorithm (Differential Evolution) to achieve the verification of classical function of sphere)

采用simulink搭建的BPSK调制解调模块(Simulink built using BPSK modulation and demodulation modules)

基于灰度的归一化匹配算法：将原图以及匹配图灰度化，算出相关系数后得到匹配区域。(Based on Gray' s normalized matching algorithms: the original image and the gray level of matching graph, calculate the correlation coefficient obtained after the matching area.)

matlab中信噪比计算程序，可以检验使用matlab内置函数添加的噪声是否正确(Can be tested using matlab citic noise ratio calculation, matlab built-in functions to add noise is correct )

有限元TetrahedronElement的matlab程序(FEA matlab TetrahedronElement)

network security algorithm ceasar cipher codes, simple implementation

灰度图像阈值分割，用二维otsu方法实现的matlab程序(Gray image threshold segmentation, using two-dimensional Otsu method of matlab program)

机车制动速度提取分析,分析刹车，减速，加速，制动速度以及加速度的变化(Locomotive brake speed extraction and analysis, analysis of braking, deceleration, acceleration, braking and speed of change of acceleration)