RM

说明：  一个简单的CZT chirp-Z变换例程(a simple example of CZT)

螺旋桨唱音信号建模，FFT变换后有明显的谐波(The propeller singing sound signal is modeled, and FFT transformation has obvious harmonic )

几何绕射理论，是高频解决电磁场问题的方法，本书很具有代表性(GTD is a high-frequency electromagnetic fields to solve the problem, this book is a representative)

严格的衍射积分计算，实现光栅结构透过反射场2维分布的严格解计算，利用散射积分对耦合模方程进行严格计算解 衍射，光栅，场，二维，积分，散射矩阵，耦合模理论(Strict calculation of the diffraction integral, the grating structure is realized through the rigorous solution of the 2 dimensional distribution of the reflection field. Diffraction, grating, field, two-dimensional, integral, scattering matrix, coupled mode theory)

最速下降法就是梯度下降法,可以用于求解最小二乘问题(线性和非线性都可以)。可以说是求解机器算法的最古老、最经典的模型，另一种常用的方法是最小二乘法。(The steepest descent method is the gradient descent method, which can be used to solve the least squares problem (both linear and non-linear). It can be said that it is the oldest and most classical model for solving machine algorithm. Another commonly used method is the least square method.)

说明：  任意边界结构正交曲线网格生成程序，使用方便简单(Arbitrary boundary structure of orthogonal curvilinear grid generation procedure, easy to use simple)

主要用来进行Umat子程序指导编程说明用的文件(The document is mainly used for writting a Umat project by fortran language.)

计算任意两个等维矩阵之间对应坐标点的距离(Calculate the distance between the corresponding coordinate points of any two equal dimensional matrices.)

最好的dijkstra 算法 matlab实现。 可以计算任意两点间的最短距离和路径。 不要参考其他的matlab程序，他们的路径都有问题。(Best Dijkstra algorithm matlab. You can calculate the shortest distance between any two points and path. Do not refer to other matlab program, their path has a problem.)

用于matlab环境下的支持向量机svm的工具箱，做这方面的朋友很需要哦(Matlab environment for support vector machine SVM Toolbox, make this area really need a friend Oh)