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抛物型方程的有限差分法——六点对称格式，即Crank-Nicolson格式(Parabolic finite difference method- six point symmetric form,i.e.Crank-Nicolson Form)

弹簧振子的simulink仿真，基本的振动系统，二阶线性微分方程(simulink simulation of spring-mass system, general vibration system, ode2 linear differential equation)

单基侧视杂波谱和角度多普勒迹的仿真程序，如果有什么不对的还望大家指点，希望对大家有帮助(The simulation program of single side clutter spectrum and angle Doppler trace, if what is wrong also hope everyone pointing, we hope to help)

说明：  计算流体力学的典型流程，navier-stokes方程组的数值解法(The typical computational fluid dynamics process, navier-stokes equations numerical solution)

Bandwidth (signal processing) or analog bandwidth, frequency bandwidth or radio bandwidth: a measure of the width of a range of frequencies, measured in hertz Bandwidth (computing) or digital bandwidth: a rate of data transfer, bit rate or throughput, measured in bits per second (bps) Spectral linewidth: the width of an atomic or molecular spectral line, measured in hertz

说明：  数字信号处理设计与仿真分析 (1)建立两个模拟信号的数学模型 sa1(t)和 sa2(t)， 其中 sa1(t)是有用信号， sa2(t)是干 扰信号。 两个信号的中心频率、信号带宽等参数由学生自己选定，要求两个信号的频谱不重 叠， sa2(t)的幅度比 sa1(t)的幅度高 20dB， 两个信号时域叠加得到合成信号 xa(t)， 即 xa(t)= sa1(t)+ sa2(t) 设计计算机程序仿真产生 sa1(t)、 sa2(t)、 xa(t)信号， 分别画出三个模拟信号的时域波 形和频谱图；(Establish two mathematical models of analog signals sa1(t) and SA2 (t), where SA1 (t) is the useful signal and SA2 (t) is the dry signal Interference signals.)

This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet. For eg:-wavelets can be haar, db1, db2,dmey............... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score. Then reconstruction can be performed. Each decompsition we can choose different threshold values. For each threshold value we can calculate mse,psnr,pq(picture quality), bit ratio etc. To get pq install pqs function . (This program compress and recostruct using wavelets. We can select level of decomposition (here maximum 4 levels are given) of images using selected wavelet.For eg:-wavelets can be haar, db1, db2, dmey ........ ....... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score.Then reconstruction can be performed.Each decompsition we can choose different threshold values . For each threshold value we can calculate mse, psnr, pq (picture quality), bit ratio etc. To get pq install pqs function.)

基于MATLAB环境下的非线性方程组的求解方法对应的代码 简单易学 便于初学者消化使用(Based on MATLAB environment method for solving nonlinear equations corresponding code is easy to learn for beginners to use digest)

一种拉普拉斯边缘算法的提取的源码，大家可以看看哈(A Laplacian edge of the source extraction algorithm, we will look at Kazakhstan)

matlab进行多因素重复试验的方差分析的一个实例(matlab for multi-factor analysis of variance of repeated trials one instance)