agh_chapter03

实现了自动解方程的功能，并有详细的使用方法说明(Realize the automatic solution of functional equations, and have a detailed description of the use of methods)

实现直接序列的扩频通信，其中仿真波形很形象的反应扩频的各个部分，pn码等等(Realize the direct sequence spread spectrum communication, which is the reaction of the waveform image of spread spectrum all part of pn code, and so on )

雷达教学的经典书籍《MATLAB Simulations for Radar Systems Design》的随书光盘(radar teaching classic books "MATLAB Simulations for Radar S ystems Design "of the CD with the book)

The following Matlab scripts are used to plot the basic torque slip curves with changing input voltage, and input frequency.

菲涅尔衍射积分的 S FFT算法。理解用S FFT算法完成菲涅尔积分原理，特别是确定观察面尺寸的原理及相应公式的来源。(The Fresnel diffraction integral S- FFT algorithm.Understand complete Fresnel integral principle with S- FFT algorithm, especially the observation surface size of the source of the principle and the corresponding formula.)

主要是串口数据的收发！ 写了一个GUI界面，包括一些常用的控件，文件的读写，出错的简单处理，弹出对话框等 可能还有一些错误，欢迎拍砖！ 调试在matlab7.0.4上通过！(Mainly to send and receive serial data! Wrote a GUI interface, including some commonly used control, file read and write, a simple error handling, pop-up dialog boxes, etc. There may be some mistakes, please Paizhuan! Debugging in matlab7.0.4 adopted!)

数字上变频或者数字下变频过程中内插和抽取的多相处理，用于降低硬件消耗(polyphase filter handle)

包含有完整的IEEE80211a仿真模型，及其模块子函数。希望可以对研究无线通信的同志们有所帮助(IEEE80211a contains a complete simulation model, and the module sub-functions. Hope to study wireless communications will help the comrades)

neuronal network les reseaux de neurones seront capables d apprendre d eux memes. Les reseaux de neurones sont issues de l intelligence artificielle.

Abstract—Several algorithms have been developed for tracking formant frequency trajectories of speech signals, however most of these algorithms are either not robust in real-life noise environments or are not suitable for real-time implementation. The algorithm presented in this paper obtains formant frequency estimates voiced segments of continuous speech by using a time-varying adaptive filterbank to track individual formant frequencies. The formant tracker incorporates an adaptive voicing detector and a gender detector for formant extraction continuous speech, for both male and female speakers. The algorithm has a low signal delay and provides smooth and accurate estimates for the first four formant frequencies at moderate and high signal-to-noise ratios. Thorough testing of the algorithm has shown that it is robust over a wide range of signal-to-noise ratios for various types of background noises.