Computer-composition-principle

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.)

关于SDRAM的文件为了下载传上来的 这回够20字可以下了吗(About the pass file to download to the SDRAM)

说明：  详细介绍了用VC.NET开发城市基础地理数据库的实例，用于城市测绘，城市基础地理系统建设的重要参考。(Described in detail with the development of urban infrastructure VC.NET examples of geographic database for urban mapping, urban infrastructure an important geographic reference system.)

ansys 导入到adams中做刚柔耦合分析方法二，采用质量单元mass21，希望大家在adams中做刚柔耦合分析有所帮助(ansys and adams work together)

说明：  数字图像处理入门书籍 内含多种图像处理技术及matlab实现代码(digital image books using matlab)

最近 LCC 谐振变换器备受关注，因为它优于常规串联谐振变换器和并联谐振变换器：在负载和输入变化较大时，频率变化仍很小，且全负载范围内切换可实现零电压转换（ZVS）。本文介绍了LLC型谐振变换器的分析方法，回顾了LLC型谐振变换器的实际设计要素。其中包括设计变压器和选择元器件。采用一设计实例，逐步说明设计流程，有助于工程师更加轻松地设计LLC谐振器。(Recently LCC resonant converter has attracted much attention, because it is better than that of the conventional series resonant converter and parallel resonant converter in the load and input change, frequency change is still very small, and the whole range of the load switch can realize zero voltage switching (ZVS). In this paper, the analysis method of LLC resonant converter is introduced, and the practical design elements of LLC resonant converter are reviewed. Including the design of transformers and components. A design example is used to explain the design process step by step, which is helpful for engineers to design LLC resonators more easily.)

三菱CCLINK教程PPT，主要用于进行通信设置，程序编程讲解(Mitsubishi CCLINK tutorial PPT, mainly used for communication settings, programming explained)

详细介绍Ubuntu Linux的安装过程和方法，以及一些基础的配置方法。是Linux初学者的首选。(Details of Ubuntu Linux installation process and methods, as well as some basic configuration. Is the first choice for Linux beginners.)

单载波频域均衡论文，理论基础，新手入门学习必备。(Single carrier frequency domain equalization paper, learning essential.)

MIMO-OFDM系统空频分组码的研究与实现,2006年清华大学电子工程系硕士学位论文(MIMO-OFDM space-frequency block coding system of the Research and Implementation, Department of Electronic Engineering, Tsinghua University in 2006 a master' s degree thesis)