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用matlab求解牛顿差值 比较简单 但是可以使用的(use matlab )

Matlab codes for numerical analysis

Please read THIS DOCUMENTE

说明：  噪声中非平稳信号的频谱分析，基于MATLAB，实验报告一份(Nonstationary noise frequency spectrum analysis, based on MATLAB, a lab report)

地震作用下框架结构的非线性分析，刚度矩阵，质量矩阵，阻尼矩阵(Nonlinear analysis of frame structures under earthquake, stiffness matrix, mass matrix, damping matrix)

通过使用平面波发计算光子晶体能带图，这个图是我自己弄的，非常辛苦。但是希望能给从事光学研究的朋友的带来帮助。(Calculating the bandgap of a photonic crystal by using a plane wave gives me a very hard picture of myself. But I hope to help those who engage in optical research.)

最大类间方差法的VC++和matlab源程序，还包括其原理介绍的doc文档(Otsu method of VC++ and matlab source, but also introduced the principle document doc)

说明：  关于梯度投影算法的一个简单的例子的matlab源码程序(Gradient projection method matlab source program)

柔性机构优化设计程序，主程序为topm，只需要输入行列的单元数、体积份数、惩罚因子就可获得所需的柔性机构(compliant mechanisms to optimize the design process, the main program for the topm, only need to enter the ranks of the unit number, the volume of shares to obtain the necessary penalty factor can be compliant mechanisms)

时频分析，用于时频分析，压缩文件，概率密度曲线 ，计算样本向量x的概率密度估计，返回在xi点的概率密度f，此时我们使用plot(xi,f)就可以绘制出概率密度曲线。(Time-frequency analysis, time-frequency analysis is used to compressed files)