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求解非线性方程组的NewRaphson方法(Solving nonlinear equations NewRaphson method)

BESO的python程序，对于进行abaqus的二次开发很有帮助，这样可以将有限元单独在abaqus中进行处理，而优化算法则采用python进行编写(BESO python program, for the secondary development abaqus helpful, so that the finite element can be handled separately in abaqus, while the optimization algorithm is written in python)

预估校正法，关于解分数阶微分方程的算法程序，适合非线性方程(Solves an initial value problem for a non-linear differential equation of fractional order (FDE). The code implements the predictor-corrector PECE method of Adams-Bashforth-Moulton )

说明：  FLUENT中离散相粒子追踪设置及相关计算，设计用户自定义相关内容(Discrete phase particle tracking in FLUENT)

基于模式耦合方法建立三维面波传播模型，该代码对于做波场模拟的同学很有用。(This program calculates the wavefield produced by a monochromatic surface wave mode incoming on a 3D cartesian structure. It is based on mode coupling and multiple scattering.)

用python写的牛顿迭代法和牛顿插值法，数值分析的实验(Newton iteration method and Newton interpolation method written in Python, numerical analysis experiment.)

基于二阶锥约束的方向不变恒定束宽波束形成(Based on the direction of the same second-order cone constraint constant beamwidth beamforming)

利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。(Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)

有限元NONSAP源程序，里面带有例子，大家可以参考。(Finite element NONSAP source, which with examples, we can refer to.)

说明：  常见的空间转化代码，将彩色空间从BGR 转换到HSV，LAB等(Common space conversion codes, converting color space from BGR to HSV, lab, etc)