文章详细阐述了数字通信系统中BER仿真的方法与步骤，给出了从发射机——信道——接收机整个过程的信号传输模拟的matlab实现方法，特别给出了高斯噪声的叠加方法，Eb/N0的计算与表述及误比特率的统计等，介绍了相应的matlab库函数，是一篇通信仿真入门的好文章。
上传时间： 2016-03-17
上传用户：dengzb84
matlab实现的多个基础程序和报告并有流程图（1） 绘出正弦信号波形及频谱。 （2） 单极性归零（RZ）波形及其功率谱，占空比为50％。 （3） 升余弦滚降波形的眼图及其功率谱。滚降系数为0.5。发送码元取值为0、2。 （4） 最佳基带系统的Pe~Eb\No曲线，升余弦滚降系数a=0.5，取样值的偏差是Ts/4。 （5） Pe~Eb\No，升余弦滚降系数a=0.5，取样时间无偏差，但信道是多径信道，C(f)=abs(1-0.5*exp(-j*2*pi*f*dt))，dt=Ts/2。 （6） 仿真数字基带传输系统，包括输入、输出信号波形及其功率谱，眼图（升余弦滚降系数a=0.5），Pe~Eb\No曲线，取样时间无偏差。
上传时间： 2014-01-22
上传用户：aix008
The task of clustering Web sessions is to group Web sessions based on similarity and consists of maximizing the intra- group similarity while minimizing the inter-group similarity． The first and foremost question needed to be considered in clustering W b sessions is how to measure the similarity between Web sessions．However．there are many shortcomings in traditiona1 measurements．This paper introduces a new method for measuring similarities between Web pages that takes into account not only the URL but also the viewing time of the visited web page．Yhen we give a new method to measure the similarity of Web sessions using sequence alignment and the similarity of W eb page access in detail Experiments have proved that our method is valid and e币cient．
标签： sessions clustering similarity Web
上传时间： 2014-01-11
上传用户：songrui
a sample WDM stream class video capture driver that supports two IEEE 1394 digital cameras. The same driver may be able to support other digital cameras that conform to 1394-based Digital Camera Specification from 1394 Trade Association. Digital camera supported by dcam.sys is a data source that produces digital image data without any other input connection. It manifests itself in a DirectShow graph as a WDM Streaming Capture Device and as a capture filter that has output capture stream supporting image sizes of 320x240 with a UYVY color space. Its de-compressor, Msyuv.dll, is part of the OS delivery, and it can convert image data format from UYVY to RGB16, RGB8, or to a Direct Draw surface if the video card supports UYVY format.
标签： supports capture cameras digital
上传时间： 2014-01-13
上传用户：yph853211
mani: MANIfold learning demonstration GUI by Todd Wittman, Department of Mathematics, University of Minnesota E-mail wittman@math.umn.edu with comments & questions. MANI Website: httP://www.math.umn.edu/~wittman/mani/index.html Last Modified by GUIDE v2.5 10-Apr-2005 13:28:36 Methods obtained from various authors. (1) MDS -- Michael Lee (2) ISOMAP -- J. Tenenbaum, de Silva, & Langford (3) LLE -- Sam Roweis & Lawrence Saul (4) Hessian LLE -- D. Donoho & C. Grimes (5) Laplacian -- M. Belkin & P. Niyogi (6) Diffusion Map -- R. Coifman & S. Lafon (7) LTSA -- Zhenyue Zhang & Hongyuan Zha
标签： demonstration Mathematics Department University
上传时间： 2016-10-29
上传用户：youmo81
js框架prototype 万一你没有使用过大名鼎鼎的prototype.js，那么让我来告诉你，prototype.js是由Sam Stephenson写的一个javascript类库。这个构思奇妙，而且兼容标准的类库，能帮助你轻松建立有高度互动的web2.0特性的富客户端页面。
上传时间： 2016-11-14
上传用户：songrui
"Everyone will want this book because it provides a great mix of practical experience, historical perspective, and a depth of understanding that only comes from being intimately involved in the field. I ve already enjoyed and learned from reading this book, and surely you will too." -Sam Leffler
标签： experience historical practical Everyone
上传时间： 2017-02-10
上传用户：开怀常笑
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB cameras, PointGrey cameras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2017-05-17
上传用户：plsee
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB cameras, PointGrey cameras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2013-12-25
上传用户：xlcky
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB cameras, PointGrey cameras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2014-01-10
上传用户：xsnjzljj
