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用matlab实现的神经网络识别字母的程序，识别率达到100 。(Program of neural network regnizing letters using MATLAB, the accuracy is up to 100 )

说明：  计算时间序列的李雅普诺夫指数的著名wolf算法，比较经典与精简，适合物理专业配合所求解得非线性方程使用(Calculation of time series of well-known Lyapunov exponent wolf algorithm, compared with the streamlining of the classic, suitable for solving physics with the use of a non-linear equation)

自己编的卡尔曼滤波器，有兴趣的看下，运行无误(Own series of Kalman filter, interested look, run correctly)

用matlab实现三级小波分解，希望对初学者有所帮助(Using matlab to achieve three wavelet decomposition, want to be helpful for beginners)

matlab经济分析工具箱，能够用于指南股票。(matlab_econometrics)

finite difference method for solving navier stokes equation

matlab内显示图形的子程序，可以方便的显示各种图形，能够识别图形中任意点的轨迹(matlab display graphics within the subroutine, you can easily display a variety of graphics, can identify any point in the track graph)

这个代码是关于球体、直角体跟椎体目标的RCS计算matlab程序，简答明了，很适合初学者看的(This code is on the sphere, at right angles to the body with vertebral target RCS matlab program, the short answer is clear, it is suitable for beginners see)

应用于地震勘探来提高信号的分辨率。包含各种处理方法(Used in seismic exploration to improve the signal resolution. Includes a variety of treatment methods)

In this document has been introduced comprehensively how to solve different partial differential equations .Everbody can solve Heat Conduction Equation, Helmholtz Equation, Laplace Equation and Wave Equation for different initial and boundary conditions. This document is elemantary of to understand how to solve partial differential equations with the aid of a porgramming language.