Internet上的免费E-mail和免费Web发布

Ｉｎｔｅｒｎｅｔ上的免费Ｅ－ｍａｉｌ和免费Ｗｅｂ发布●徐迎晓Ｉｎｔｅｒｎｅｔ上有很多免费服务，它不仅包括大家所共知的ＦＴＰ，ＷＷＷ等，还有很多你意想不到的免费服务，例如免费Ｅ－ｍａｉｌ和免费Ｗｅｂ发布。一、免费Ｅ－ｍａｉｌ现在常常有几个人共用一个Ｅ－...     

Internet的商业化及中国市场前景分析

Ｉｎｔｅｒｎｅｔ的商业化对全球信息产业和电信市场的影响力越来越大，而中国的Ｉｎｔｅｒｎｅｔ业务市场也已发展到一定规模。文中介绍了Ｉｎｔｅｒｎｅｔ－Ｗｅｂ－ＮＥＴ”商业化演进过程，指出它将成为网络商务活动的首选平台，同时分析了其商业化过程所的障碍。文章还对中国Ｉｎｔｅｒｎｅｔ的发展特点进行了研究，在对国情和市场前景进行分析后，提出了ＣＨＩＮＡＮＥＴ的业务发展策略。     

Internet上的Web服务器及服务软件(上)

Ｉｎｔｅｒｎｅｔ上的Ｗｅｂ服务器及服务软件（上）●徐迎晓一、Ｗｅｂ及其服务器的诞生Ｗｅｂ服务是国际互联网Ｉｎｔｅｒｎｅｔ上最热门的应用之一。在建立企业内部网Ｉｎｔｅｒｎｅｔ中，提供Ｗｅｂ服务也十分重要。Ｗｅｂ是具有超链接的分布式、多媒体系统。Ｗｅｂ所...     

一种加速Web访问的解决方案

随着Ｉｎｔｅｒｎｅｔ的普遍应用，ＷＷＷ已成为网上生活的基本工具，但人们普遍抱怨网络浏览速度太慢。这里介绍了一种加速Ｗｅｂ访问的解决方案－－Ｗｅｂ缓存技术。从Ｗｅｂ缓存技术的基本原理入手，分析了该技术的特点，着重介绍了转发代理、透明代理及反向代理等三种基本实现方式，并指出了存在的问题。     

Web客户浏览程序的选用与获取

Ｗｅｂ客户浏览程序的选用与获取曾明目前国内已有多家机构提供Ｉｎｔｅｒｎｅｔ的ＷｏｒｌｄＷｉｄｅＷｅｂ服务，通过Ｉｎｔｅｒｎｅｔ或商业渠道也可以获得多种Ｗｅｂ客户浏览程序。但是，与Ｉｎｔｅｒｎｅｔ连网并不意味着任何一种Ｗｅｂ客户浏览程序都是可以使用的，...     

通过Web使用传统的Internet服务

通过Ｗｅｂ使用传统的Ｉｎｔｅｒｎｅｔ服务曾明Ｗｅｂ资源空间只是Ｉｎｔｅｒｎｅｔ资源空间的组成之一。除了Ｗｅｂ资源空间外，组成Ｉｎｔｅｒｎｅｔ资源空间的还有Ｔｅｌｎｅｔ资源空间、ＦＴＰ资源空间、Ｇｏｐｈｅｒ资源空间、ＷＡＩＳ资源空间和网络新闻资源空间。...     

Web页面背景的制作

Ｗｅｂ页面背景的制作＠徐迎晓Ｗｅｂ页面背景的制作●徐迎晓随着Ｉｎｔｅｒｎｅｔ的发展，越来越多的企事业单位加入了Ｉｎｔｅｒｎｅｔ，在Ｉｎｔｅｒｎｅｔ上发布自己的Ｗｅｂ页面。一个具有特色的Ｗｅｂ代表着单位的形象，而Ｗｅｂ页面背景的制作则对Ｗｅｂ的外观形象起着...     

Oracle向世人揭开Oracle8i的神秘面纱──全球第一个基于Internet的数据库产品

上月，全球第二大软件公司Ｏｒａｃｌｅ在美国纽约为到场的全球３００多个软件、硬件方面的合作伙伴展示了其全新的世界上第一个基于Ｉｎｔｅｒｎｅｔ的数据库产品──Ｏｒａｃｌｅｓｔ数据库。作为业界第一个集Ｊａｖａ程序、Ｗｅｂ站点和Ｉｎｔｅｒｎｅｔ内容为一体的数据库，其所包括的突破性Ｉｎｔｅｒｎｅｔ特性，可从根本上简化基于Ｉｎｔｅｒｎｅｔ的应用程序的开发、部署和内容管理的工作。这些新特性被直接嵌入到数据库中，可为Ｏｒａｃｌｅ用户及其合作伙伴提供最完整的Ｉｎｔｅｒｎｅｔ开发环境，并为Ｉｎｔｅｒｎｅｔ和企业应用…     

Intranet网络建设中的关键技术

从Ｉｎｔｒａｎｅｔ的概念出发，阐述了企业Ｉｎｔｒａｎｅｔ网的原理和作用及其与Ｉｎｔｅｒｎｅｔ的关系，进而论述了建设企业Ｉｎｔｒａｎｅｔ网的三大关键技术，即客户／服务器模型，防火墙和Ｗｅｂ技术。     

Internet部分专用名词解释

Ｗｏｒｌｄ Ｗｉｄｅ Ｗｅｂ, ＷＷＷ, ３Ｗ; Ｔｈｅ Ｗｅｂ（万维网）万维网是一个基于超文本的信息查询工具。它能将 Ｉｎｔｅｒｎｅｔ上的相关数据有机地组织在一起,向 Ｉｎｔｅｒ－ｎｅｔ用户提供一种便利、直观的访问信息的方法。 Ｂｒｏｗｅｒ（浏览器）浏览器用于定位和查看网页的程序。例如：网景浏览器（Ｎｅｔｓｃａｐｅ Ｎａｖｉｇａｔｏｒ）,ＩＥ浏览器（Ｍｉｃｒｏｓｏｆｔ Ｉｎｔｅｒｎｅｔ Ｅｘｐｌｏｒｅｒ）。 ＨＴＴＰ（超文本传输协议）这是Ｗｅｂ服务器和Ｗｅｂ 浏览器之间传递数据的标准协议。 ＦＴＰ（文件传输…     

World Wide Web: whence, whither, what next?

The World Wide Web (WWW) has become, next to electronic mail, the most popular Internet application. It has been a major contributor in turning the Internet into a household word. The WWW allows users to retrieve text and multimedia objects from servers located throughout the world, with objects connected by hypermedia links. The author presents a snapshot of the WWW after about half a decade, and speculates about where this young medium might be improved and which directions it might take from a technical perspective. Like most (successful) Internet technologies, the underlying central functionality of the Web is rather simple: a naming mechanism for files (the universal resource locator, URL), a typed, stateless retrieval protocol (hypertext transfer protocol, HTTP), and a minimal formatting language with hyperlinks (hypertext markup language, HTML)     

Commerce on the Internet

The article discusses the World Wide Web (Internet), focusing on using the WWW to support commerce-electronic marketing and digital publishing. Businesses are increasingly using the Web for advertising and electronic catalog based retail sales. Immediate benefits from the use of the technology include the ability to monitor and track the behavior of one's customers, provided by access statistics the WWW server maintains. In addition, many aspects of managing customer interaction can be automated, for example, submission and collection of customer surveys, billing, and so forth. In the future, more organizations will use the net for innovative ways of providing online magazines and electronic commerce. Although the approximately 20 million Internet users represent only a small fraction of the world population, the dramatic growth of the market in recent years will continue to lure commerce online     

Web信息检索中信息分类技术研究

随着Internet/Intranet的快速发展和普及,丰富的Web资源构成一个巨大的全球信息仓库。在海量数据空间中快速、准确地获取用户所需成为Web检索系统研究的焦点。将一种全新的网页自动分类技术引入WWW信息抽取领域,解决网上信息有效获取的问题。获取网站分类体系,设计的Web信息自动归类算法,可通过Web数据抽取机制以及Web信息分类技术实现检索结果的分类和层次化展示,使用户快捷准确地从WWW上获取所需信息。     

An overview of web caching replacement algorithms

The increasing demand for World Wide Web (WWW) services has made document caching a necessity to decrease download times and reduce Internet traffic. To make effective use of caching, an informative decision has to be made as to which documents are to be evicted from the cache in case of cache saturation. This is particularly important in a wireless network, where the size of the client cache at the mobile terminal (MT) is small. Several types of caching are used over the Internet, including client caching, server caching, and more recently, proxy caching. In this article we review some of the well known proxy-caching policies for the Web. We describe these policies, show how they operate, and discuss the main traffic properties they incorporate in their design. We argue that a good caching policy adapts itself to changes in Web workload characteristics. We make a qualitative comparison between these policies after classifying them according to the traffic properties they consider in their designs. Furthermore, we compare a selected subset of these policies using trace-driven simulations.     

A traffic model for non-real-time data users in a wireless radionetwork

Based on an analysis of Internet protocols for data communication, we propose a simple model for future data traffic in wireless radio networks. Model parameters are selected so as to resemble traffic from the Worldwide Web (WWW) access and from distributed file systems. By changing a single parameter, the model can be switched between resembling up- or down-link traffic. The model is intended for design and performance analysis of radio resource allocation algorithms in future wireless systems     

SEPTEMBER-secure electronic publishing trial

The authors report on the Secure Electronic Publishing Trial (SEPTEMBER), a Communications Society initiative to determine how best to disseminate technical information over the Global Internet. SEPTEMBER uses World Wide Web (WWW) technology to distribute society publications. This article reports on the implementation and results of the trial. We believe that the results are of wide interest, from those interested in developing electronic publications to those who simply enjoy and learn by reading Communications Society publications     

Three-dimensional modeling and visualization of the cochlea on theInternet

3D modeling and visualization of the cochlea using the World Wide Web (WWW) is an effective way of sharing anatomic information for cochlear implantation over the Internet, particularly for morphometry-based research and resident training in otolaryngology and neuroradiology. In this paper, 3D modeling, visualization and animation techniques are integrated in an interactive and platform-independent manner and implemented over the WWW. L.T. Cohen et al.'s (1996) template shape with mean cross-sectional areas of the human cochlea is extended into a 3D geometrical model. Also, spiral computer tomography data of a patient's cochlea is digitally segmented and geometrically represented. The cochlear electrode array is synthesized according to its specification. Then, cochlear implantation is animated with both idealized and real cochlear models. The insertion length, angular position and characteristic frequency of individual electrodes are estimated online during the virtual insertion. The optimization of the processing parameters is done to demonstrate the feasibility of this technology for clinical applications     

CAW：基于代理技术的WWW协同应用环境

ＣＡＷ是我们设计的一个以ＷＷＷ为基础、以一组协同工作的代理为核心的应用环境，它从体系结构上对ＷＷＷ做了改造，引入了ＷＷＷ要素之间的协同作用，从而可以支持高级的ＣＳＣＷ应用，同时改善了ＷＷＷ的一些基本性能。因此，ＣＡＷ在Ｉｎｔｅｒｎｅｔ和ｉｎｔｒａｎｅｔ环境中将有着广泛的用途     

Traffic Capacity of UMTS System in Reverse Link

UMTS can be connected to data networks. So Internet traffic services such as WWW browsing, email, ftp, SMTP, etc should be handled by UMTS. Each of the traffic services has some specific properties but all of them obey a basic ON/OFF model. For a traffic service there is some unused (OFF) times between their transmitted packets which we may use them for other services to increase the traffic capacity of the network. In this paper we propose a new method on the Internet traffic evaluation in an interference limited UMTS-WCDMA system. In this method first we calculate ON and OFF time durations of the above traffic services based on the model presented in 3GPP then their activity factors. Secondly we introduce new capacity curves such as The Number of Web browsing users/Email users/ftp users/Telnet users and Fax users versus voice users. These are applicable in traffic planning for wireless systems.     

Quantization of cepstral parameters for speech recognition over theWorld Wide Web

We examine alternative architectures for a client-server model of speech-enabled applications over the World Wide Web (WWW). We compare a server-only processing model where the client encodes and transmits the speech signal to the server, to a model where the recognition front end runs locally at the client and encodes and transmits the cepstral coefficients to the recognition server over the Internet. We follow a novel encoding paradigm, trying to maximize recognition performance instead of perceptual reproduction, and we find that by transmitting the cepstral coefficients we can achieve significantly higher recognition performance at a fraction of the bit rate required when encoding the speech signal directly. We find that the required bit rate to achieve the recognition performance of high-quality unquantized speech is just 2000 bits per second