hechengdizhenjilu

用Matlab来模拟光通信中的光纤交叉相位调制。此类仿真比较少，值得参考。(Using Matlab to simulate the optical fiber communication cross-phase modulation. Reference worthwile.)

悬臂梁频率方程计算；将完整模型与损伤模型进行对比分析(Beam frequency equation to the full model were compared with the damage model)

手工指定节点的编号以及位置之后，可以自动生成节点的坐标，以及杆的左右节点，不需要手动输入。(make the topology of truss)

说明：  MATLAB 短路电流计算开发，节点导纳矩阵，实际应用(MATLAB development of short-circuit current calculation, the node admittance matrix, the practical application of)

The demand of high data rate services has been increasing very rapidly and there is no slowdown in sight. We know that the data transmission includes both wired and wireless medium. Often, these services require very reliable data transmission over very harsh environment. Most of these transmission systems experience much degradation such as large attenuation, noise, multipath, interference, time variance, nonlinearities and must meet the finite constraints like power limitation and cost factor. One physical layer technique that has gained a lot of popularities due to its robustness in dealing with these impairments is multi-carrier modulation technique. In multi-carrier modulation, the most commonly used technique is Orthogonal Frequency Division Multiplexing (OFDM)

MATLAB实现的一种基于最小二乘的椭圆拟合直接算法源代码.附件中的源代码是matlab编写的，实现一种对于椭圆的稳定的数据拟合算法。当然必须要提供至少5个点的数据，椭圆x，y轴的中心点，最大轴最小轴(err)

通过ucdos获得一段波长区间的模场分布，而后用matlab获得光子晶体光纤的非线性(Through the cudos get a wavelength of interval mode field distribution, then use matlab, the nonlinear photonic crystal fiber )

说明：  matlab辅助小波分析与应用的源码，包含了一些常用的小波分析常规算法和快速算法，能有效帮助学习小波分析(Matlab support wavelet analysis and application of the source code contains a number of commonly used conventional wavelet analysis algorithm and fast algorithm, can help learning wavelet analysis)

这是计算最优路径的Floyd算法在Matlab中的实现程序。(This is the calculation of the optimal path Floyd algorithm in Matlab implementation process.)

全国研究生数学建模大赛，PM2.5问题。采用灰色理论GM(1，1)模型实现地区PM2.5的预测，内含真实数据文件。(The Graduate School of mathematical modeling contest, PM2.5 problem. By using the grey theory GM (1, 1) model to realize the prediction of area PM2.5, with real data file.)