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ABAQUS中的循环模型umat，并附有解释，实现循环加载下的模拟(Cycle model in ABAQUS umat, along with explanation, to achieve the simulation under cyclic loading)

In this section we introduce the idea of Galerkin approximations by considering a simple 1-d boundary value problem

用C++实现排队论中M/M/1模型。简单方便。(Using C++ implementation in the M/M/1 queuing theory model. Easy and convenient.)

求边界层方程的相似解法，使用四阶四级经典龙格库塔方法推进，适用于平板边界层，绕楔形体边界层流动等(Seeking boundary layer equations similar solution, using fourth-order Runge-Kutta method to promote four classic for boundary layer around the wedge boundary layer flow, etc.)

Introduction to Estimation and the Kalman Filter (KC-1) Extended Kalman Filter Navigation System Example

一个有限元计算的例子,初学者可以参考，简单易看懂(an example of FEm computation)

FFT with fix point 2*N

说明：  finite element theory

代码实现多项式拟合算法(非内置函数)。有较详细的说明。(Polynomial algorithm design (non-built-in function), the source explained in more detail Chinese.)

说明：  利用Abaqus子程序UAMP实现PID控制。(PID control is implemented using the Abaqus subroutine UAMP.)