3D-fdtd

矩阵转换问题 行与列的个数均为n 的矩阵称为n 阶方阵。假定矩阵中的每个元素的值在0到9之间，则可以将矩阵中的所有元素按行依次排列得到一个“单行矩阵字符串”。(Matrix conversion, the number of rows and columns of the matrix n are called n-order square. Assume that each element of matrix value in the 0 to 9, you can press all the elements of the matrix rows in order of priority for a " single matrix string." )

程序采用C语言，实现最小二乘辨识算法和递推最小二乘算法(Program using C language, least squares identification algorithm and recursive least squares algorithm)

很详细的一维FDTD介绍，以及MATLAB程序说明(Very detailed one-dimensional FDTD presentation and description of the MATLAB program)

本书介绍了XFEm在结构件的断裂分析中的应用(this book introduces the application of XFEM in the field of fracture analysis)

将矩阵显示成地震剖面，如果只 a 是输入，可扩展，X，Z，安姆，连接AMX自动决定，否则为“可扩展”是一个标量， ，z 的载体用于注释的偏移和时间，连接AMX振幅范围内。(The matrix shown as seismic profiles, If only a is enter, scal,x,z,amn,amx are decided automatically otherwise, scal is a scalar x, z are vectors for annotation in offset and time, amx are the amplitude range.)

用Python语言写的多目标进化算法库（2017年最新版本），包含常见的多目标进化算法以及当前最新文献中的最新算法，能够实现不同算法之间的性能比较（包含常见的GD, IGD, HV等评价指标自动生成）。可以供进化计算、多目标优化、单目标优化算法的学习参考。Python语言版本简单易懂，实用性强。(Library of multi-objective evolutionary algorithm written in Python language (the latest version in 2017), including multi-objective evolutionary algorithm and the most common new literature in the new algorithm, can realize the performance between different methods (including the common GD, IGD, HV and other evaluation index generation). It can be used as a reference for evolutionary computation, multi-objective optimization and single objective optimization. Python language version is simple and easy to understand, practical.)

大名鼎鼎的J.A.Stratton版电磁理论（中文版），书中有关电磁理论方面的内容是很有指导性的，属于经典书籍。(Famous J.A.Stratton version of electromagnetic theory (Chinese version), the book content of the electromagnetic theory is very instructive, are classic books.)

基于matlab的短时傅立叶变换，有语音读取功能！(Based on the short-time Fourier transform matlab, have voice reading!)

说明：  提取信号时域特征，频域特征，以及时频域特征，小波变换(Extract signal time domain features)

ABAQUS中各种不同本构的内聚力单元fortran用户子程序(ABAQUS in a variety of constitutive cohesive unit fortran user subroutines)