photonic_band_structure

abaqus子程序学习资料，欢迎大家下载学习，共同讨论~(ABAQUS subroutine learning materials)

这是一个数值计算Fortran程序，将矩阵进行奇异值分解，SVD.txt存放待分解的矩阵，u.dat,v.dat为分解后的左右矩阵，qiyizhi.dat和qiyizhi0.dat为得到的奇异值。(This is a numerical Fortran program matrix singular value decomposition, SVD.txt store to be factored matrix, u.dat, v.dat about decomposition of the matrix, qiyizhi.dat and singular value obtained qiyizhi0.dat .)

半导体激光器的数学计算 对速率方程 可能对你计算有点帮助

一个drucker prager模型的 的用户子程序，用于求解平面应变问题 abaqus UMAT and inp(drucker prager yield model for abaqus )

迭代最小二乘法,反演中应用极广泛，非常经典(Iterative least-squares method，An extremely wide range of inversion, very classic)

WRF模拟结果气象要素的检验对比，包含均方根误差，偏差和相关系数等(WRF simulation test results comparing meteorological elements, including the root mean square error, deviations and correlation coefficients)

说明：  利用正交向量法求Lorenz系统的李雅普诺夫指数，并绘出指数谱图。(Orthogonal Vector Method Lorenz system, Lyapunov exponent, and draw the index spectrum.)

给出一个求解连续混沌系统的最大Lyapunov指数的程序，经验证有很好的吻和度，并能应用的高维（超混沌）或其他混沌系统。(Solving a continuous chaotic system is given the maximum Lyapunov index procedure, proven good kiss and degrees, and can use the high-dimensional (super-chaotic), or other chaotic systems.)

说明：  abaqus vumat 子程序入门 UMAT FOR ABAQUS/STANDARD INCORPORATING ELASTIC BEHAVIOUR FOR PLANE STRAIN AND AXI-SYMMETRIC ELEMENTS.(introduction to abaqus vumat subroutine)

关于一的微分方程数值解,一维波动方程初边值问题Crank-Nicholson格式,及追赶法(On one of the numerical solution of differential equations, one-dimensional wave equation Crank-Nicholson format, and to catch up with the Law)