chazhi

EMD分解C语言算法，内含EMD分解所需的三次样条插值C语言算法。(EMD decomposition algorithm C language, containing the decomposition EMD cubic spline interpolation algorithm C language.)

用于生成空气动力学力学计算中的计算O型网格(generate the calculational grid)

该源程序是黑油模型的源代码，黑油模型是油藏数值模拟的基本程序。(The source is the source code of black oil model, black oil model is the basic numerical reservoir simulation program.)

多种曲线拟合方法，包括埃尔米特插值，差商，牛顿法，龙格库塔法( U591A u79CD u66F2 u7EBF u62DF u5408 u65B9 u6CD5 uFF0C u5305 u62EC u57C3 u5C14 u7C93 u7279 u63D2 u503C uFF0C u5DEE u5546 uFF0C u725B u987F u6CD5 uFF0C U9F99 u683C u5E93 u5854 u6CD5)

说明：  umat abaqus plasticity

ransac直线拟合：使用ransac方法剔除不好的点，留下好的点做直线拟合，这样拟合出的直线更符合实际，因为没有了错误数据的参与。(ransac linear fitting: Use ransac methods eliminate the bad points, making a good point to make fitting a straight line, so that the fitted straight line is more realistic, because there is no involvement of erroneous data.)

粒子群算法在解决非线性方程上的应用，给出了详细程序(Particle swarm algorithm for solving nonlinear equations, gives detailed procedures)

the structure of the DG-FEM is very similar to that of the finite element method (FEM), there are several fundamental differences. In particular, the mass matrix is local rather than global and thus can be inverted at very little cost, yielding a semidiscrete scheme that is explicit. Furthermore, by carefully designing the numerical flux to reflect the underlying dynamics, one has more flexibility than in the classic FEM to ensure stability for wavedominated problems. Compared with the FVM, the DG-FEM overcomes the key limitation on achieving high-order accuracy on general grids by enabling this through the local element-based basis

说明：  通过MATLAB编程模拟理想弹塑性应力应变曲线(Simulating the stress-strain curve for perfect plasticity by MATLAB coding.)

常微分方程数值解法，又是一个数值分析的常用算法(Numerical Solution of ordinary differential equations, numerical analysis is a common algorithm)