simplecalculator

Hilbert Haung spectrum

基于Laguerre多项式的拟合程序，可以控制多项式的结束，以及变量alpha。(Based on Laguerre polynomial fitting procedure, you can control the end of polynomials, and variable alpha.)

说明：  牛顿法又称牛顿-拉弗森方法（Newton-Raphson method），是一种在实数域和复数域上近似求解方程的方法。本程序收敛速度快，迭代步数可取大一些(Newton method, also known as Newton-Raphson method, is an approximate method for solving equations in real and complex fields. The program has fast convergence speed so the number of iteration steps can be larger.)

用于求解一维气体动力学的欧拉方程代码，采用戈东诺夫格式，显式推进，可仿真非定常激波管(For solving one-dimensional Euler equations of gas dynamics code, using Godunov format, explicit advance, can simulate unsteady shock tube)

基于matlab的对光学设计里像差测量和校正的程序(Matlab aberration measurement of the optical design and calibration procedures)

Matlab 算法寻找Bessel函数的零点。(find the zero point of Bessel functions)

利用龙格库塔法（等步长，变步长）计算椭圆方程，双曲线方程，抛物线方程等。对各类微分方程进行数值计算。(The use of Runge-Kutta method (such as step, variable step size) calculated elliptic equations, hyperbolic equations, such as parabolic equation. Various types of differential equations for numerical calculation.)

A finite element fortran code for 2-D truss

王兆华关于apFFT原理的一篇文章，写的很简单明了，方便大家更好理解全相位FFT(WangZhaoHua about apFFT principle of an article, written in very simple and clear, facilitate everybody better understand all phase FFT )

说明：  一个复数域的自适应盲信号均衡器的MATLAB例程(a complex field of adaptive equalizer Blind MATLAB routines)