NumericalRecipesinF90

对于abaqus子程序学习的初学者，这是一个学习umat的很好算例,(Abaqus subroutine for beginners to learn, this is a good example to learn umat,)

可以实现十几位整数的四则运算，效率也较好(Four operations can be more than a dozen integer,and the efficiency is better)

说明：  非线性有限元程序，NONSAP is a general finite element program for the nonlinear static and dynamic analysis of complex structures. The program is very flexible and was designed to be extended and modified by the user. In particular the program can easily be modified to use a different formulation of the equations of motions, different time integration operators and other additional options. (Nonlinear finite element program, NONSAP is a general finite element program for the nonlinear static and dynamic analysis of complex structures. The program is very flexible and was designed to be extended and modified by the user. In particular the program can easily be modified to use a different formulation of the equations of motions, different time integration operators and other additional options.)

常用的matlab代码，非线性方程组求解，基本可以满足大学和研究生常用代码(Common Mathematical Codes)

butterworth 高通滤波、低通滤波、带通滤波、带阻滤波器程序(Bandpass filter, low pass, high pass, band pass, band stop)

用于求解二维欧拉流动方程的有限差分程序,基于NND法,求解精度较高.(Perfect fortran program by two dimensional NND finite difference method for Euler Equations on unstructured Grids, structured Grids and adaptive unstructured Grids. )

一个求解Navier-Stokes不可压缩流动的代码。用Matlab编制。(It s a source code for Navier-Stokes equation in incompressilbe flow, which is written in Matlab.)

电磁炉原理及维修请大家参考，如有问题，请与我联系(Induction Principle and maintenance please refer to, if there are questions, please contact me)

abaqus中的三微裂纹扩展，一起学习下(the abaqus of three micro-crack propagation, with learning under)

说明：  无约束优化中的共轭梯度算法程序，解压缩后就可以用了(Unconstrained optimization of the conjugate gradient algorithm procedure can be extracted after the)