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for fem matlab for solving all 2D and 3D problem

La logique floue est le meilleur moyen de convertir les stratégies de contrô le du langage naturel qui sont utilisées par l’homme à une forme utilisable par les machines. Des expériences ont montré qu’un contrô leur classique donne parfois même de meilleurs résultats que l’opérateur humain

本资源主要对矩阵分解中的LU分解、LDL’分解、乔列斯基分解，以及无约束最优化领域中的最速下降法、牛顿法、拟牛顿法的原理、步骤和算法进行了简要介绍，并对各种方法进行了Matlab编程实验，得到了较好的结果。 本资源包含了《矩阵分解及无约束最优化方法的原理和应用简介》文档以及其中用到的全部Matlab程序，非常适合初学者学习与研究。(The resources are mainly in the matrix decomposition LU decomposition, LDL decomposition, Cholesky decomposition, and unconstrained optimization field steepest descent method, Newton s method, the principle of quasi-Newton methods, procedures and algorithms are briefly introduced, and various methods of Matlab programming experiment, get a better result. This resource contains a matrix decomposition and unconstrained optimization methods Introduction to the principles and applications which uses all the documents and Matlab program, ideal for beginners learning and research.)

说明：  运动方程中的速度向量和加速度向量用位移的某种组合来表示，将微分方程组的求解问题转化为代数方程组的求解问题，并在时间区间内求得每个微小时间区间的递推公式，进而求得整个时程的反应。 中心差分法是一种显示的积分法，它基于用有限差分代替位移对时间的求导（即速度和加速度）。(Velocity vectors and acceleration vectors in motion equations are expressed by a combination of displacements. The problem of solving differential equations is transformed into the problem of solving algebraic equations. The recurrence formulas of each small time interval are obtained in the time interval, and then the response of the whole time interval is obtained. The central difference method is a display integration method, which is based on the finite difference method instead of the displacement derivative of time (i.e. velocity and acceleration).)

说明：  计算循环卷积，DFT，IDFT,FFT... .. (Computing cyclic convolution, DFT, IDFT, FFT ... ..)

说明：  MATLAB及其在电力系统仿真研究中的应用(MATLAB and Its Application in Power System Simulation Study)

用于地震学中的正演波形计算和波形拟合，也可用于地震勘探中，用途广泛(a software that can forward the waveform )

说明：  Matlab VR toolbox tutorial

说明：  数值分析 隐式算法改显示算法 非弹性分析(Numerical analysis implicit algorithm to display the elastic analysis algorithm)

主要是关于灰度共生矩阵应用，其中将灰度共生矩阵从0，45，90，135四个方向进行了计算，并对共生矩阵能量、熵、惯性矩、相关4个纹理参数进行了计算，十分有用。(Mainly on the GLCM application, which will GLCM from 0,45,90,135 four directions were calculated, and the co-occurrence matrix of energy, entropy, moment of inertia, related to four texture parameters were calculated, very useful.)