entrega11

改变声音信号采样频率。应分别考虑由低到高和由高到低，最好包括声音采集和回放等功能。(To change the audio signal sampling frequency. Should be considered separately from low to high and high to low, preferably including audio capture and playback functions.)

使用matlab对给定的图像进行提取rgb颜色特征，并输出颜色直方图(use matlab to extract the rgb feature )

说明：  包含很多matlab实用程序，设计各个方面的应用。(Matlab contains a lot of utility, design all aspects of the application.)

用DFT近似计算连续时间周期信号的频谱，对matlab新手适用。(Approximate calculation using DFT spectrum of continuous-time periodic signal of matlab novice apply.)

这是一个好用的频偏估计算法的matlab仿真程序,LDPC码的完整的编译码，FIR 底通和带通滤波器和IIR 底通和带通滤波器。( This is a useful frequency estimation algorithm matlab simulation program, Complete codec LDPC code, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter.)

包含2个程序，一个是对地震记录抽道的小程序，一个是对数据做五点平滑的程序，很好用(get several traces 2D seismic data)

说明：  实现粒子群算法和鲸鱼算法，可调通，用于测试23个函数(Realize particle swarm optimization and whale algorithm)

互相关函数,cross-correlation function

transformée de fourier rapide

一个基于matlab软件的混合Copula模型的估计方法，利用到了惩罚的思想。(A matlab software mixed Copula Model-based estimation method, to the idea of ​ ​ punishment.)