差分法

一些关于数学思想应用的matlab代码，以供大家学习分享；(The application of mathematical ideas about matlab code for them to learn to share )

说明：  采用有限元及有限差分的方法进行微分方程的求解(This book is introduction to finite difference and finite element methods is aimed at advanced undergraduate and graduate students who need to solve differential equations. T)

ansys-初应力-残余应力-焊接残余应力-ansys温度场(ansys-initial stress)

可控源音频大地电磁一维occam反演程序(Controlled source audio magnetotelluric inversion program of one-dimensional occam)

RD成像算法，快速傅里叶变换函数，适合学习(RD imaging algorithm, fast Fourier transform function, suitable for learning)

铁木辛柯梁梁单元有限元程序，可以自动形成刚度阵，质量矩阵(Ironwood oct Ke Liangliang unit finite element program can automatically form stiffness matrix, mass matrix)

完整的模式识别库，包括矩阵运算，各种模式识别算法，如K均值、SVM、RVM、NN、LDA等(Complete pattern recognition library, including matrix computation, a variety of pattern recognition algorithms, such as K-means, SVM, RVM, NN, LDA, etc.)

数值方法的5个重要的算法： 1.[Dirich.m] 求解拉普拉斯方程的狄利克雷方法. 用于偏微分方程的数值解 2.[Hamming.m] 汉明方法是用来修正微分方程的多步预测。 3. [Milne.m] 米尔恩 - 辛普森差分方程求解方法，用于预测校正方法。 4. [Rkf45.m]龙格 - 库塔 - 沃尔伯格错误控制和步骤的方法求解微分方程的近似解 5.[Romber.m]著名的龙贝格积分源代码。计算结果存在并显示为下三角矩阵。(Numerical Methods in five of the more important algorithms: 1. [Dirich.m] to solve the Laplace equation Dirichlet method for the numerical solution of partial differential equations 2.[Hamming.m] Hamming method is the multistep forecast corrected differential equations. 3. [Milne.m] the Milne- Simpson method as a differential equation solver used forecast correction method. 4. [Rkf45.m] Runge- Kutta- Wahlberg error control and step method for solving differential equations approximate solution 5. [Romber.m] the famous Romberg integral source code numerical integration, the presence of computable results show a lower triangular matrix.)

说明：  fluent模拟焊接的udf源文件 fluent模拟焊接的udf源文件(udf source file fluent fluent simulate welding simulation welding udf source file)

说明：  uel fortran code for CPE4 with analysis of beam example