DOA

大跨结构、高耸结构随机风荷载数值模拟，方便快捷、使用。(Span structures, the towering structure stochastic numerical simulation of wind loads, convenient to use.)

一个简单的基于MATLAB的图形图像处理程序，能实现简单的图像处理功能！(A simple MATLAB-based graphical image processing procedures, to achieve a simple image processing functions!)

迹线法计算轮轨几何关系程序，用于轨道车辆动力学计算，非常实用！(Trace method to calculate the relationship between wheel and rail geometry procedures, for the track vehicle dynamics calculation, very useful!)

说明：  matlab实现加汉明窗，矩形窗，并对它们进行傅里叶变换，并实现频谱的分析。(matlab realize Jia Hanming window, rectangular window, and they are subjected to Fourier transform, and to achieve the analysis of the frequency spectrum.)

Preconditioned Conjugate Gradient iterative Ax=b solver.Routine to solve a symmetric positive definite linearsystem Ax = b using the Preconditioned Conjugate

The above file will give internal boundary, external boundary, morphological gradient, also thining and thickening of image.

内含五个程序 1.zoeppritz Aki K I 和Richards P G的纵波近似程序 2.地震记录合成程序 3.大地电磁一维正演程序 4.雷克子波合成程序 5.地震反射系数生成程序(1.zoeppritz Aki KI and Richards PG longitudinal wave approximation procedures 2. Seismogram synthesis program 3. Magnetotelluric one-dimensional forward modeling program 4. Ricker wave synthesis procedure 5. Seismic reflection coefficient generator)

利用GPS导航文件（N文件），计算实时卫星轨道位置。即利用广播星历计算卫星位置。(Using GPS navigation files (N file), to calculate real-time satellite orbital position. That position is calculated using a broadcast satellite ephemeris.)

contains OFDM technique and AWGN channel acts as noise

some solutions for the nomal questions with matlab