CoDeSys编程教程(全)

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.)

介绍电烙铁的使用，非常好的资料。值得学习和收场。(introduction of dianlaotie,it very good information of dianlaotie. useful to study and get.)

说明：  地理信息系统原理，是一本电子书教材，希望对大家有用(The principle of geographic information system is an e-book teaching material, I hope it is useful to everyone)

In many areas of commerce, government, academia, and hospitals, large collections of digital images are being created. Many of these collections are the product of digitizing existing collections of analogue photographs, diagrams, drawings, paintings, and prints. Usually, the only way of searching these collections was by keyword indexing, or simply by browsing. Digital images databases however, open the way to content-based searching. In this paper we survey some technical aspects of current content-based image retrieval systems.

LINUX与UNIX SHELL编程指南(LINUX_and_UNIX_SHELL_Programming_Guide)

Introduction To CSS2样式表简介 本手册针对的是已有一定网页设计制作经验的读者。其目的是提供最新最全的样式表内容的快速索引及注释。所以对于样式表的基础知识，在此仅简单介绍，恕不赘述。 本手册的升级信息与版权声明请参阅关于本书页面。本手册中专用词汇请参阅中英文词汇对照表。 限于篇幅，对于一些过于繁杂的相关内容，如动态样式属性（Dynamic Properties），滤镜（Filters），行为（Behaviors）请参阅我的其它相关著作。 本书中涉及到的所有HTML对象（Object，Element），HTML特性（Attributes）和属性（Properties）请参阅我的相关著作。(Introduction To CSS2样式表简介 本手册针对的是已有一定网页设计制作经验的读者。其目的是提供最新最全的样式表内容的快速索引及注释。所以对于样式表的基础知)

种基于Unit-Linking PCNN和HSI空间的彩色图像分割新方法。(Species based on Unit-Linking PCNN and the HSI space for color image segmentation new approach.)

说明：  access编程的最好帮助文档，包括很多相关api编程(access to the best programming help documentation, including many related api programming)

说明：  数据结构、严蔚敏、课后习题、第四版紫色、电子书(Data structure, Fourth Edition, Yan Weimin, exercises after class)

powerworld中文实验指导书，包括5节点系统的潮流分析和暂态分析，帮助快速入门(powerworld Chinese experiment instructions, including a 5-node system trend analysis and transient analysis help QuickStart)