HVDCandFACTS

本文通过对男性和女性声音的语音特征的研究，发现男女声的基音频率存在较大的差异，并设计了基于基音频率分析的男女声识别系统。男女声识别系统由以下三个模块电路构成：话筒放大器，低通滤波器，半波整流电路，单片机测量控制模块。话筒放大器采用NE5532P音前置芯片，对语音信号进行放大；八阶低通滤波器MAX293完成基音信号的提取；单片机STC12C5410AD实现频率测量和控制输出功能。经仿真与电路实测，男女声的识别效果良好。(In this paper, the voices of male and female voice characteristics of the findings of a study of the fundamental frequency of the sound of men and women there is a big difference, and the design of frequency analysis based on the pitch of the voice recognition system for men and women. Voice Recognition System for men and women from the circuit the following three modules: the microphone amplifier, low-pass filter, half-wave rectifier circuit, single-chip measurement control module. NE5532P sound using the microphone pre-amplifier chip amplification of voice signals eight MAX293-order low-pass filter to complete the extraction of pitch signal STC12C5410AD single-chip realization of the frequency of measurement and control output. By circuit simulation and measurement, the identification of male and female voices well.)

集成运算放大器应用原理，超星阅览器阅览(Integrated Operational Amplifiers principle, viewing reader Superstar)

有关对流层散射传播的电子书，其中《对流层散射传播》是张明高写的书(Tropospheric scatter about the spread of e-books, including " troposcatter propagation" is a book written by Zhang Gao)

ansys车辆移动荷载命令流，方便直接输入(ansys vehicle moving load command stream, convenient and direct input)

通信天线建模与MATLAB仿真分析一书中10-3题目代码(Communication Antenna Modeling and MATLAB Simulation Analysis 10-3 Topic Codes)

一本凸最优化方面的经典文献Convex Optimization 作者Stephen Boyd(A convex optimization of the classic literature Convex Optimization Author: Stephen Boyd)

说明：  isight应用实例，帮助初学者快速掌握isight使用方法(ISIGHT application examples help beginners quickly master the use of iSIGHT)

钱塘江流量，非常珍贵难得的资料，欢迎下载(Qiantang River flows, very precious rare information, please download )

watermarking research part 2

this is the matlab code by using the direct AOA algorithm for finding the direction of arrival of the smart antennas