memo_Saleh_dpd

内含巴特沃思滤波器（Butterworth）MATLAB代码，分高通与低通两种情况，并用mesh显示滤波器的三维图(Containing Butterworth filter (Butterworth) MATLAB code, sub-high-pass and low pass both cases, with mesh filter of three-dimensional map display)

语音文件中有单频噪声，设计高频滤波器和低频滤波器进行语音滤波(Audio files with a single frequency noise, high frequency filters and low-frequency filter design for voice filtering)

说明：  matlab的qpsk的程序代码 是初学者的福音(The qpsk matlab program code is the gospel for beginners)

说明：  对一副测试图像进行加各种噪声，然后进行多帧平均，中值滤波，均值滤波，维纳滤波，理想低通滤波，巴特沃斯低通，带通滤波，自适应滤波九种方法处理，并分析结果，得出各种滤波方法的优缺点。包括实验报告(Plus a pair of test images of all kinds of noise, and then multi-frame averaging, median filtering, mean filtering, Wiener filter, the ideal low-pass filter, Butterworth low-pass, band pass filtering, adaptive filtering nine kinds of approach and analyze the results, obtained the advantages and disadvantages of various filtering methods. Including the lab report)

Electron concentration in the AlAs conduction band as a function of Fermi level position at room temperature

计算一接地金属槽，其上盖对地绝缘且具有电位 ，侧壁与底壁为地电位。用有限差分法编程计算凹槽内的电位分布。(Calculation of a metal tray earthing, the upper cover on the insulation and has potential, side wall and the bottom wall to ground potential. Calculation of potential distribution in the groove with the finite difference method programming.)

matlab编写的地震波,输入数据文件将生成地震波曲线(matlab prepared seismic waves, the input data file will generate seismic waves curve)

matlab调用ansys的例子，适合初学者。(matlab call ansys example, suitable for beginners.)

短时傅里叶变换的matlab代码，可以用来测试短时傅里叶变换(Matlab code, and short time Fourier transform can be used to test the short-time Fourier transform)

This is about viterbi algorithm