spread-spectrum

采用自相关函数法求基音周期，将采样得到的声音信号按每20ms一帧分为若干帧，并对每帧的序列求自相关函数，取自相关函数第一个最大值点算出基音周期，并以帧为横坐标，基音周期为纵坐标画图，并去除野点，最后取图中浊音部分即面积较大部分的值作为基音周期。(Using the autocorrelation function method pitch period, the sound signal is sampled every 20ms frame is divided into a plurality of frames, and each frame sequence uates the autocorrelation function, taken the first maximum point of correlation function calculated the pitch period, and frame as the horizontal, the vertical axis pitch drawing and remove outliers, and finally take the value of the area that is part of a larger portion of the figure as voiced pitch.)

步进频雷达脉冲信号，设置了起始截止频率，步进频率，脉宽等等参数，简单易懂(Stepping frequency radar pulse signal, set the initial cutoff frequency, step frequency, pulse width, etc. parameters, easy to understand)

Analysis.and.Design.of.Control.System.Using.MATLAB外文经典书目(Analysis.and.Design.of.Control.System.Using.MATLAB language classic bibliography)

传热，通过记录恒定传热仿真与空气交换热过程(Heat transfer, by recording the constant heat transfer simulation and air exchange heat process)

稀疏表示的matlab小程序，欢迎来联合开发网下载！(Sparse representation matlab small procedures, welcome to the Joint Development Network download!)

模拟拓展卡尔曼滤波的计算，雅各比矩阵的运算(Extended Kalman Filter)

Linear programming using 4 different methods - simplex - revised simplex - revised simplex LU - prime dual interior point

最优化计算方法常用程序汇编，参考价值很大(failed to translate)

一篇比较好的英文介绍编程的文章,里面包含很多有用的知识，很难下载。(a good English paper for programming。it includes much useful knowledge and it is hard to download it)

Examples of antireset-Windup