photonic_crystal_method_of_characteristic_matrix_1

COMSOL_Multiphysics基本操作指南和常见问题解答，非常有助于帮助使用有限元建模的朋友！(COMSOL_Multiphysics basic instructions and FAQs, very helpful in helping friends using finite element modeling!)

说明：  分形理论计算，粗糙面结合面的法向载荷和法向接触刚度计算(fractal thoetry simulation)

利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。(Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)

计算等径双圆筒透镜的场分布，并画出等位线分布图(Calculation of Electron Physics )

偏微分方程数值解上机实习 运用古典显式差分格式求解二维扩散方程的初边值问题 运用P-R差分格式求解二维扩散方程的初边值问题

说明：  udf模拟油膜蒸发过程及其温度分布和各组分的浓度(Udf simulates oil film evaporation process and its temperature distribution and concentration of each component)

基于Laguerre多项式的拟合程序，可以控制多项式的结束，以及变量alpha。(Based on Laguerre polynomial fitting procedure, you can control the end of polynomials, and variable alpha.)

利用OPENMP实现矩阵相乘的C程序。Demonstrates a matrix multiply using OpenMP.()

K均值算法实现二维点的聚类，可以手动选择分的类别数(K mean algorithm for clustering two dimensional points)

美国汪利宏的蒙特卡洛及卷积模拟程序，可以模拟top-hat光束和高斯光束在生物组织中的传输(U.S. WANG Li-hong of the Monte Carlo and convolution simulation program can simulate the top-hat beam and Gaussian beam transport in tissue)