基于pcb-sift的特征提取

matlab写的一个产生蜂窝的程序，很漂亮(write a matlab generated cellular process, it is beautiful)

该代码首先对ECG信号进行消噪过滤，并且对信号进行平方，加窗等处理，最后用于对QRS波形的检测，压缩文件内同时包含了2个心电数据信号，可直接用于测试(The code first ECG signal de-noising filter, and the square of the signal, such as window handle, and finally used for the detection of QRS waveform, at the same time compressed file contains two ECG data signals can be directly used to test)

This script will setup the nonlinear simulation (UAV_NL.mdl) and call trim and linearization routines. Select the desired aircraft here in this script, via the "UAV_config()" function call.

单脉冲信号的模糊函数的matlab代码，可以方便的调用，已经验证(failed to translate)

matlab的文档，想要学习matlab的同学可以看看。(The people who wants to learn the Matlab well can download the PDF documents.)

libev-4.15源码 libev是Marc Lehmann用C写的高性能事件循环库。通过libev，可以灵活地把各种事件组织管理起来，如：时钟、io、信号等。libev在业界内也是广受好评，不少项目都采用它来做底层的事件循环。node.js也是其中之一(libev-4.15 source libev Marc Lehmann is written in C, a high-performance event loop library. By libev, the flexibility to manage the organization of various events, such as: clock, io, signals. libev is also widely acclaimed in the industry, many projects have adopted it as the underlying event loop. node.js is one of them)

Updates the phase quality-guided path following phase unwrapping method by Bruce Spottiswoode

最小二乘法在二维平面测向交叉定位里的应用(The least squares method in the two-dimensional plane measured to cross positioning)

具体步骤： (Ι)利用汉明窗对腭裂语音信号进行分帧，得到分帧后的语音信号x(n)。 (Ⅱ)将加窗分帧后的语音信号进行离散傅里叶变换。因FFT变换点数过大会增大运算复杂度，过小会降低频谱分辨率，故本文选取882点。即得到每帧语音信号的线性频谱(Ⅲ)将上面得到的线性频谱通过32个具有三角形滤波特性的Mel频谱滤波器组，得到Mel频谱 S(l) (Ⅳ)对滤波器组的输出依次做对数变换、离散余弦变换，最终得到MFCC系数

Box-Muller变换，将[0,1]均匀分布转换为[0,1]高斯正态分布，在matlab中也可用randn函数生成正态分布。变换的思想可用于其他没有正态分布随机函数的编程语言（如C）()