无线传感器网络结构及关键技术介绍     

赵志强 《苏州市职业大学学报》2007,18(4):60-62

无线传感器网络已成为IT领域的热点研究方向。通过对无线传感器网络的基本概念和结构的介绍,对拓扑控制、网络协议、网络安全、数据融合管理等关键技术进行列举。  相似文献   

Word statistics in Blogs and RSS feeds: Towards empirical universal evidence     

R. Lambiotte  M. Ausloos  M. Thelwall 《Journal of Informetrics》2007,1(4):277-286

We focus on the statistics of word occurrences and of the waiting times between such occurrences in Blogs. Due to the heterogeneity of words’ frequencies, the empirical analysis is performed by studying classes of “frequently-equivalent” words, i.e. by grouping words depending on their frequencies. Two limiting cases are considered: the dilute limit, i.e. for those words that are used less than once a day, and the dense limit for frequent words. In both cases, extreme events occur more frequently than expected from the Poisson hypothesis. These deviations from Poisson statistics reveal non-trivial time correlations between events that are associated with bursts of activities. The distribution of waiting times is shown to behave like a stretched exponential and to have the same shape for different sets of words sharing a common frequency, thereby revealing universal features.  相似文献   

割集电流混合方程法     

李海量  高言 《上海海事大学学报》1991,(2)

本文提出的方法用来求解含理想电压源及理想受控电压源支路的网络,克服了改进节点法通过增加网络变量来求解网络的缺点,大大减少网络方程系数矩阵中的零元素,扩大了计算机解题的规模。  相似文献   

中小企业电子商务及信息网络建设   总被引：4，自引：0，他引：4       下载免费PDF全文

孟雪梅 《中国图书馆学报》2003,29(1)

电子商务为中小企业的发展提供了新的发展契机。进行信息网络建设 ,抢占市场空间 ,抓住机遇 ,注重电子商务人才的培养是中小企业获得竞争优势的关键。参考文献 6。  相似文献   

基于随机游走算法的社交网络构建     

刘辉 《湖北成人教育学院学报》2014,(1):11-12

为了挖掘社交网络的用户信息,从复杂的社交网络提取有价值的数据,需要对社交用户网络进行可视化处理和层次构建,本文采取随机游走算法来实现社交用户网络的层次生成。首先,从社交网络的网络营销方式和商业价值两方面阐述了社交网络研究价值,接着提出了随机游走算法数学模型,最后进行实例仿真,生成社交用户的层次网络模型。  相似文献   

Should next generation access networks fall within the scope of universal service? A European union perspective     

Alberto Nucciarelli  Bert M. Sadowski  Ernst-Olav Ruhle 《Government Information Quarterly》2014

In 2010 the European Commission (EC) undertook a review of its current Universal Service Obligation (USO) to discuss whether or not broadband should be included in it. In fact, convergence of telephony, internet and media, further market liberalization and rapid technological development in the broadband market challenge the traditional definition of USO and increasingly question its notion of a “basic set of communication services”, which does not include broadband. In this context, the paper looks at the origins, the theoretical arguments for, and the empirical basis of the USO in light of the ongoing debate in the EU, and links these arguments to technological developments and changing demand conditions in European broadband markets. The authors propose that the European Commission should include in its future USO regulation provisions for a wider set of services based on Next Generation Access (NGA) networks rooted in the EC's new regulatory approach. Even if these provisions have not been included in the new USO framework in November 2011 further discussions are needed to account for the new realities of broadband markets in the European Union.  相似文献   

Social Network Analysis and Professional Practice: Exploring New Methods for Researching Technical Communication     

Jordan Frith 《Technical Communication Quarterly》2014,23(4):288-302

This article provides background on social network analysis, an innovative research paradigm that focuses on the importance of social networks. The article begins by giving background on the development of social network analysis and different methods used by social network analysis researchers. The article then examines how these methods can be used in the field of technical communication by focusing on how technical communicators form social networks and connect diverse audiences.  相似文献   

TCA2003测量机器人在江垭水利枢纽安全监测网复测中的应用     

金言平  邵永生  刘继军 《长江工程职业技术学院学报》2014,31(3):10-11

介绍TCA2003测量机器人在大坝变形监测中的工作原理及工作流程,及其在江垭水利枢纽安全监测网复测中的应用。  相似文献   

对满足特定解的复微分方程的系数的估计     

黄黎明  李浩 《乐山师范学院学报》2014,(12):20-22

讨论复线性微分方程f（n）＋An-1（z）f（n-1）＋…＋A1（z）f＇＋A0（z）f=0的解满足一定条件时,系数函数Aj需要满足的条件。  相似文献   

部分因式展法拉普拉斯反变换深层探析     

郎佳红  蒋顺利  王彦  郑诗程  章家岩 《马钢职工大学学报》2014,(1):36-39

运算电路的解析,常用部分因式展开法进行拉普拉斯反变换,以求取时城解。对象函数分母进行因式分解,可能出现复根情况的讨论,相关课程、文献分析不够深入,给出的求取原函数方法单一,解题容易出错。为此,对复根情况进行了较为深入的探讨,并提出了一种新颖的求解原函数的方法,消除了求解高阶象函数的原函数困惑,并很大提高了求取原函数的速度和准确率。  相似文献