网络计费系统分析

计费系统是网络管理的重要组成部分.文中讨论了网络计费系统的组成、分类及不同的计费数据采集技术.由捕获数据链路层及其以上层数据包,可分析数据包中的内容,实现基于用户或IP地址方式的计费.局域网内的计费通常需要结合基于代理和基于IP的计费方式;对于更大的园区网络可以根据具体的需求,多种计费方式结合起来,构成更加完备的网络计费系统.应用数据采集技术就可实现并开发出满足自己单位需求的计费系统.     

基于IXP2400的高性能网络认证/计费系统

介绍了一个基于网络处理器技术的网络认证/计费系统。该系统结合802.1x等技术的特点，具有多重信息绑定、支持脱离交换设备进行认证/计费、支持多种接入方式等优点，采用IXP2400构建的系统硬件平台，具有较好的性能，可提供3Gbit/s的吞吐量，解决了目前IP网络运营中认证/计费所面临的诸多困难问题。     

网络计费系统数据采集技术研究

计费系统对于ISP以及与因特网互连的Intranet都必不可少，计费系统的开发，数据采集是关键。文中介绍了满足不同计费方式需要的数据采集技术，以及它们各自的特点，应用数据采集技术实现并开发出满足自己单位需求的计费系统。     

基于SNMP的园区网计费系统原理

讨论了网络计费系统的原理,比较了基于Telnet的计费方式和基于SNMP的计费方式的不同,论述了SNMP协议在网络计费系统中的实现。在此基础上设计了一个具体的计费系统模型,该系统具有数据采集、数据处理、计费信息查询、计费规则设置和报表生成等功能。     

基于SNMP的园区网计费系统设计及实现

本文讨论了网络计费系统的原理 ,比较了基于 TEL NET的计费方式和基于 SNMP的计费方式的不同 ;论述了 SNMP协议在网络计费系统中的实现 .在此基础上设计了一个具体的计费系统模型 ,该计费系统具有数据采集、数据处理、计费信息查询、计费规则设置和报表生成等功能     

基于网关的网络计费系统设计与实现

Internet迅速发展,如何对网络的使用进行计费越来越重要。对网络计费系统的功能需求进行分析,然后基于Linux当中的Netfilter模块实现网关服务器。在实现过程中采用多线程技术,将计费数据采集过程和费用计算过程区分开,提高网关的性能。     

一种可有效防止盗用的校园网流量计费方法

本文分析当前常用的网络计费方式,指出它们已经无法应付当前的IP地址或帐号盗用手段,并给出一种采用加密套接层隧道(SSL Tunnel)技术结合代理(Proxy)技术的网络流量计费方法,它能很好的解决目前的盗用问题。     

煤炭企业的网络计费系统研究

IP网络使用和市场的迅猛发展带来了IP计费和管理的问题,这一点在煤炭企业尤为突出.为实现企业网络资源的合理使用与管理,吸纳资金,对网络提供技术更新与服务,有必要在煤炭企业内部设计和运用IP计费系统.本文从系统设计、模块构成、注意事项及优化方式等多方面对煤炭企业的IP计费系统进行了研究,并对系统的运用提出了建议.     

基于SNMP协议的校园网计费系统的数据采集

主要介绍在基于IP地址计费的校园网计费系统中,如何应用简单网络管理协议（SNMP）来进行数据采集,并运用Java语言加以实现。     

基于通信计费的数据采集网络模式的研究

目前通信计费的方式有很多种,通信计费的数据采集已成为现代通信企业最重要的一个工作环节。本文主要 对通信网络计费数据采集与传输系统的现状,以及通信计费的数据采集网络模式进行详细的分析。希望通过本文的阐述,可 以给通信计费的数据采集网络模式应用方面提供参考。     

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。