fft

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)

说明：  ARIMA的R语言实现。这是一份关于使用R统计软件进行时间序列分析的入门文档(This is a start-up document about time series analysis using R statistics software.)

说明：  时域物理光学法，包括了立方体刨分程序，二维fft计算，任意目标的散射系数的程序。 学习物理光学的很好的入门代码。(The physical optics method in time domain, including the cube planing procedures, two-dimensional fft calculation, any scattering Coefficients of the target program.)

excel宏的SPI计算，降水指数。非常详细的说明(The excel macro SPI precipitation index. Very detailed description of)

说明：  有两个ARMA过程，其中信号1是宽带信号，信号2是窄带信号，分别用AR谱估计算法、ARMA谱估计算法和周期图法估计其功率谱。(There are two ARMA processes, in which signal 1 is a wideband signal and signal 2 is a narrowband signal. The power spectrum is estimated by AR spectrum estimation algorithm, ARMA spectrum estimation algorithm and periodogram method respectively.)

确定近似最优正则化参数，很好的解决不适用问题(To determine the approximate optimal regularization parameter, it is very good to solve the problem.)

说明：  飞机气动计算流体力学分析的经典之作,值得学习的好书(a excellent book about aerodyanmics introduction)

改程序是计算出金属表面等离子体直波导的有效折射率随波长和传输长度随波的两色散曲线，另外给定Drude-Lorentzia模型参数给定后，还可以求解介电常数以及画出相应实部和虚部的曲线(This programer is used to calculate Ag relative dielectric constant accroding to the Drude-Lorentzia and sovle the transcendental equation for even illumination. At the same time,it can draw the diagram of relationship between the dispersion curve and the Transmission with the length. )

是CA算法的test程序，用于描述微观枝晶长大的代码！(CA algorithm is the test procedure, used to describe the micro-dendrites grew up in the code!)

利用BLT方程求解平面波对双线结构传输线的终端响应。(BLT equation for solving the plane wave transmission line on two-lane structure of the terminal response.)