A new cable fault location method based on wavelet reconstruction is proposed. In this method the difference between the currents of faulty phase and sound phase under the high voltage pulse excitation is used as the measured signal and is decomposed in multi-scale by wavelet transform, then reconstructed in single scale. Comparing with traditional fault location method by travelling wave, the presented method will not be interfered by the reflected wave from the branch joint of cables or from other positions where the impedances are not matched and not be influenced by fault types, otherwise, the reflected waves can be recognized even the faulty position is near to the measuring terminal, at the same time, the influence of the wave speed uncertainty can be reduced. The correctness of the proposed method is proved by simulation results.
标签： method reconstruction location proposed
上传时间： 2016-02-04
上传用户：maizezhen
在linux下实现使用脚本文件，实现FTP传输。脚本生成函数。
上传时间： 2016-02-04
上传用户：tyler
C++ class libraries for network-centric, portable applications, integrated perfectly with the C++ Standard Library. Includes network protocols (Sockets, HTTP, FTP, SMTP, POP3, etc.) and an XML parser. Licensed under Boost license.
标签： network-centric applications integrated libraries
上传时间： 2016-02-05
上传用户：chenxichenyue
一个遗传算法 这是一个非常简单的遗传算法源代码，是由Denis Cormier (North Carolina State University)开发的，Sita S.Raghavan (University of North Carolina at Charlotte)修正。代码保证尽可能少，实际上也不必查错。对一特定的应用修正此代码，用户只需改变常数的定义并且定义“评价函数”即可。注意代码 的设计是求最大值，其中的目标函数只能取正值；且函数值和个体的适应值之间没有区别。该系统使用比率选择、精华模型、单点杂交和均匀变异。如果用 Gaussian变异替换均匀变异，可能得到更好的效果。代码没有任何图形，甚至也没有屏幕输出，主要是保证在平台之间的高可移植性。读者可以从ftp.uncc.edu, 目录 coe/evol中的文件prog.c中获得。要求输入的文件应该命名为‘gadata.txt’；系统产生的输出文件为‘galog.txt’。输入的 文件由几行组成：数目对应于变量数。且每一行提供次序——对应于变量的上下界。如第一行为第一个变量提供上下界，第二行为第二个变量提供上下界，等等。
上传时间： 2013-12-20
上传用户：myworkpost
描述Serv-UFTP建立和维护手册，对那些刚接触FTP网友，特别是自己刚架设FTP的个人FTP管理员有帮助
标签： Serv-UFTP
上传时间： 2014-08-05
上传用户：mpquest
inetutils是在unix和linux下， 專門提供ftp和telnet服務的軟體。
上传时间： 2014-10-13
上传用户：ryb
wget讓你可以在console介面下， 直接下載ftp和http的檔案。
上传时间： 2016-03-05
上传用户：sjyy1001
会打字就可以网上开商店 本系统是一套自选网上商城精美模版，自主软件管理，自行网店经营的网上商城平台，系统具有强大的软件管理、购物车、订单统计、会员管理等功能，同时拥有灵活多变的软件 管理、新闻管理等功能，功能强劲的后台管理界面，无需登录FTP，通过IE浏览器即可管理整个网站。它为您提供了多款专业美观的店面样式、俱备完整的购物网站功能、结构简 单、容易使用、并设有促销广告和店标自定义功能，操作简单，您不需懂得太多的计算机知识，也无需制作复杂网页，您只需订购这套系统，把网店代码及模板文件，通过FTP远 程上传到您的网络空间，就完成网上商店初步设置。随后，登录到后台，点点鼠标，在线设置轻松设置各项功能及添加您要出售的软件，您的网上商店就这样轻松建设成功了，适 合于小型企业及个人经营管理。
上传时间： 2016-03-05
上传用户：英雄
This title demonstrates how to develop computer programmes which solve specific engineering problems using the finite element method. It enables students, scientists and engineers to assemble their own computer programmes to produce numerical results to solve these problems. The first three editions of Programming the Finite Element Method established themselves as an authority in this area. This fully revised 4th edition includes completely rewritten programmes with a unique description and list of parallel versions of programmes in Fortran 90. The Fortran programmes and subroutines described in the text will be made available on the Internet via anonymous ftp, further adding to the value of this title.
标签： demonstrates engineering programmes computer
上传时间： 2014-01-13
上传用户：youke111
基于OFDM的无线宽带系统仿真It contains mainly two parts, i.e. link-level simulator and system-level simulator. Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx. Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. SNR mapping table, that can be used for the system-level simulation. System-level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural SNR, and finds the corresponding error rate.
标签： simulator i.e. system-level link-level
上传时间： 2016-03-15
上传用户：xsnjzljj
