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nannvshengshibie
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.)
- 2009-04-12 16:23:04下载
- 积分：1
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SQL
本书对SQL技术的使用和发展进行了全面的讨论。全书共分六大部分，其中第一部分到第五部分分别介绍了SQL的历史和SQL标准的变化，如何使用SQL获取、更新数据，如何构造数据库结构以及如何实现数据的安全方案等，并描述了如何使用ANSI标准中的嵌入式SQL。(This book SQL technology use and development of a comprehensive discussion. The book is divided into six large part to the fifth part of the first part of which introduced the history and the SQL standard SQL changes, how to use SQL to obtain, update data, how to construct the database structure and how to implement data security programs, and describes the How to use the ANSI standard for embedded SQL.)
- 2010-03-04 00:11:47下载
- 积分：1
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asp100tip
asp常见100个问题解答。对于新手入门阶段学习帮助很多。(asp 100 tips.)
- 2010-01-21 17:29:15下载
- 积分：1
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ICL7660SMTV
ICL7660是一款不错的正压变负压的稳压芯片，这里提供中英文资料各一份(ICL7660 is a good positive change negative regulator chip, the information provided here in English A)
- 2011-06-17 09:08:28下载
- 积分：1
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CHAOS-IN-ELECTRIC-drives
混沌控制在机电控制系统中的应用，很好的外文原版书籍。供大家学习，参考。(chaos in Electrical drive)
- 2016-10-14 21:11:03下载
- 积分：1
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LinuxMulti-threadProgrammingManual
Linux下多线程编程指南，pdf格式，介绍了Solaris操作系统中POSIX线程和Solaris线程的多线程编程接口，该指南将指导程序员如何创建性新的多线程程序以及如何向现有的程序中添加多线程(Under the multi-threaded Linux Programming Guide, pdf format, introduced the Solaris operating system, POSIX threads and Solaris threads of the multi-threaded programming interface, the guide will guide programmers how to create multi-threaded nature of the new procedures and how to add to an existing program Multithreading)
- 2010-01-29 10:13:32下载
- 积分：1
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VC++6.0
说明： 本资料系转载内容，适合初学者参考，与大家共享，希望对大家有帮助，(Reprint the contents of the data is suitable for beginners and reference, and share, in the hope that we help)
- 2008-09-12 11:49:42下载
- 积分：1
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englishmoban
英文投稿信的几个模版和实例(Received a letter in English a few templates and examples)
- 2007-11-24 14:21:27下载
- 积分：1
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Game-Design-and-Development
非常好的游戏策划教程，如果你是游戏策划新手，那么这本书非常适合你。(Very good game design tutorial, if you are new to the game plan, then this book is for you.)
- 2011-01-22 01:12:42下载
- 积分：1
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algorithm_design_and_logic_implemention
本书作者为夏宇文，详细讲解了从算法设计与验证到硬件逻辑实现的过程，要求读者有一定的verilog基础(This book author XIA Yu-Wen gave a detailed account from algorithms to hardware logic design and verification of implementation process, requiring readers to have some basis for verilog)
- 2009-11-11 21:19:03下载
- 积分：1
