c8_pi4demo

说明：   1.录制一段自己的语音信号，并对录制的信号进行采样； 2.画出采样后的语音信号的时域波形和频谱图； 3.给定滤波器的性能指标，采用窗函数法和双线性变换法设计滤波器， 并划出滤波器的频域响应； 4.用该滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱， 并对滤波前后的信号进行对比，分析信号的变化； 5.回放语音信号； 6.设计一个信号处理系统界面(1. Recorded their own voice for some signal, and recording the signal sampling 2. Draw samples of the voice signal after the time-domain waveform and frequency spectrum 3. Given filter performance indicators, using a window function method and dual- Design of linear transformation filters, and draw the filter frequency response 4. to use the filters on the collected signal filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes 5. playback voice signal 6. to design a signal processing system interface)

this file present one of the most popular way to calculate dijkstra distance presentation, especialy for 3D triangulation mesh.

将.tdms文件直接导入matlab，以方便读取和处理。 第9个版本，测试没有问题(Function to load LabView TDMS data file(s) into variables in the MATLAB workspace.)

试设计一个切比雪夫I型高通数字滤波器，采样率为8000Hz,fp=1000Hz,fs=700Hz,Rp=3dB,Rs=20dB。(Try to design a type I Chebyshev high-pass digital filter sampling rate of 8000Hz, fp = 1000Hz, fs = 700Hz, Rp = 3dB, Rs = 20dB.)

to help new student how to use matlab

米氏散射系数，在不同条件下，雨中，霜雾，晴朗天气(Mie scattering coefficient under different conditions, rain, frost and fog, sunny weather)

风车转动，用Matlab制作简单的风车动画(The windmill to rotate)

以grach的方法来分析网络流量，并对网络流量进行预测，划定1980s为训练，以20s为预测(The grach method to analyze the network traffic, and to predict the network traffic, delineated 1980s for training, to 20s as the forecast)

在进行车辆动力学仿真时，轮胎受力对汽车的平顺性、操纵稳定性和安全性起着重要作用。选择符合实际又便于使用的轮胎模型是建立车辆模型并进行动力学仿真的基础。(In the simulation of vehicle dynamics, the force of tire plays an important role in vehicle ride comfort, handling stability and safety. Choosing the tire model which is practical and easy to use is the foundation of establishing the vehicle model and performing the dynamic simulation.)

说明：  MATLAB数学建模经典案例实战 [余胜威 编著] 2015年版MATLAB Mathematical Modeling Classic Case Practice [Edited by Yu Shengwei] 2015 Edition(MATLAB Mathematical Modeling Classic Case Practice [Edited by Yu Shengwei] 2015 Edition)