掉线不用愁ADSL宽带掉线疑难杂症揭秘

由于ADSL是电话铜线承载的一种宽带接入技术,电话线传输质量的优劣,直接影响到ADSL宽带的使用。在诸多的ADSL宽带故障,掉线问题堪称一大顽疾,也是困扰ADSL用户的一种故障。ADSL掉线的问题比较复杂,涉及到硬件和软件的问题,解决方法也非常繁琐。不过,只要精通ADSL宽带接入技术的各个环节,解决ADSL掉线疑难杂症将不再发愁。     

LINUX下一种宽带接入PPPoE的设计与实现

随着通信技术的迅猛发展,骨干网络带宽得到了迅速的提升。ADSL接入技术以其低成本与高带宽的特点,成为目前宽带接入技术的主流。本文介绍了ADSL宽带接入的几种方式及其比较,和PPPoE在嵌入式操作系统Linux下的一种实现.     

通过基于ATM方式的ADSL宽带接入技术构建虚拟专用网络

VPN的出现使企业通过Internet既安全又经济地传输私有的机密信息成为可能。而构架在公用网络之上的专用网的性能直接取决于宽带数据接入技术。对基于ATM方式的ADSL宽带接入技术进行了探讨，分析了该种方式开展业务的特点，给出了一种基于ATM方式的ADSL宽带接入技术来构建虚拟专网的实现方案。     

ADSL宽带接入技术的原理及应用

文章主要介绍了ADSL宽带接入技术的基本原理，关键技术和行业标准，并展示了ADSL的发展现状和应用前景。     

宽带技术及其应用

文章介绍了ADSL宽带接入技术及其特点,和几种常用的ADSL应用方式,并将其与目前流行的几种接入方式Modem,ISDN,Cable Modem和DDN进行了对比,得出ADSL技术的优势。     

掉线不愁 ADSL掉线疑难杂症逐个揭秘

由于ADSL是电话铜线承载的一种宽带接入技术,电话线传输质量的优劣,直接影响到ADSL宽带的使用.在诸多的ADSL宽带故障中,掉线问题堪称一大顽疾,也是困扰ADSL用户的主要故障.ADSL掉线的问题比较复杂,涉及到硬件和软件的问题,解决方法也非常繁琐.不过,只要精通ADSL宽带接入技术的各个环节,解决ADSL掉线疑难杂症将不再发愁.     

ADSL新发展

虽然ADSL远没有年初预期的那样火爆,但其作为一种先进、成熟的宽带接入技术,以其高速上网、经济实惠等优点在多种宽带接入方式的竞争中脱颖而出,并开始成为最受用户欢迎的宽带接入方式。但随着ADSL在国内的逐渐推广,做为一种高科技的ADSL,其复杂安装令用户束手无策。电信部门也无法给用户提     

ADSL宽带接入网技术

本文简单介绍了接入网的业务需求、发展趋势及现状，重点介绍了ADSL接入技术特点，并设计了ADSL宽带接入的网络结构。     

用基于ATM方式的ADSL宽带接入技术构建VPN

在公用网络上提供专用网服务的技术,已成为当前网络技术研究的热点之一。而构架在公用网络之上的专用网的性能直接取决于宽带数据接入技术。文章对基于ATM方式的ADSL宽带接入技术进行了探讨,分析了该方式开展业务的特点,给出了一种基于ATM方式的ADSL宽带接入技术来构建虚拟专网的实现方案。     

基于带路由功能的ADSL实现多用户共享接入

为找到一种经济、高效的宽带接入技术,比较了几种常用接入方式,介绍了广泛使用的 ADSL的基本工作原理,综合分析了ADSL的接入技术,提出了新的基于带路由功能的ADSL的接 入方案,并用具体实例详细描述了实现方法和步骤。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。