LU

基于MATLAB，利用牛顿迭代法，求解复杂非线性方程组(Solving nonlinear equations by Newton iteration)

说明：  二维笛卡尔坐标系下网格的划分，包括多重网格等。(Two-dimensional Cartesian coordinate system, the division of the grid, including the multi-grid and so on.)

计算波导中四波混频效率，考虑线性损耗、自由载流子吸收损耗、双光子吸收损耗(FWM efficiency in silicon waveguide)

可以用于科学计算的库，数值计算库，只要将头文件包含即可。(Can be used for scientific computing libraries, numerical libraries, header files will be included as long as you can.)

大规模配电网118节点的潮流计算程序，辐射状网络，含原始数据。(Large-scale distribution network 118 nodes of the power flow calculation procedures, radial network, with the original data.)

在传统Otsu算法的基础上进行了一些改进，提高了算法的性能(Made some improvements on the basis of the traditional Otsu algorithm to improve the performance of the algorithm)

多目标粒子群的matlab程序，文中设置了两个目标，f1和f2，采用加权求解的方式(more goals in Matlab PSO procedures, the text set up two goals, f1 and f2. using the weighted solution!)

地球物理偏移相关程序包，能实现时间偏移、深度偏移、及逆时偏移等，编写语言：Matlab。(Geophysical migration coding package, time migration, depth migration, reverse time migration, the writing language: Matlab.)

里面包含了随机矩阵理论里经典的仿真，如marcenko-pastur law,tracy-widom law等(It contains some classical simulationa in the random matrix theory，such as marcenko-pastur law,tracy-widom law)

ABAQUS的二次开发，非常适合学习VDLOAD的同志们学习，来自廖公云老师的《ABAQUS有限元软件在道路工程中的应用》(Learning from Liao Gongyun teacher "ABAQUS finite element software ABAQUS secondary development, very for learning VDLOAD, comrades in road works")