基于VxWorks操作系统的NTP授时服务器SNMP代理

简单网络管理协议(SNMP)作为TCP/IP相关服务的一部分,是当前最为流行的网络管理协议.本文以NTP网络授时服务器的SNMP代理开发作为核心内容,在VxWorks操作系统中实现了SNMP代理的功能.     

SNMP在嵌入式操作系统(VxWorks)中的实现

简要分析了UCD—SNMP协议栈源码，并在此基础上介绍了SNMP简单网络管理协议在嵌入式操作系统的(VxWorks)的实现，从而提出了在各种嵌入式操作系统实现SNMP的方法。     

基于Web/Java技术的SNMP网络性能管理的研究

本文研究了简单网络管理协议和网络性能管理的有关内容。通过对简单网络管理协议(SNMP)、MIB-Ⅱ管理信息结构(SMI)的分析和使用，设计了基于Web的客户层 服务层 资源层的三层网络管理模型。采用Java Servlet实现Web服务器，C语言实现应用服务器，Java Applet作为客户端。Socket作为信息转发通道。系统采用Java Applet Servlet技术，实现了基于Web的管理方式。     

基于SNMP协议的分布式网络监控系统的设计实现

基于SNMP（简单网络管理协议）的分布式网络监控系统具有结构简单、扩展性强的特点。文章对SNMP及其管理模型进行了分析、设计并实现了基于该协议的分布式网络监控系统。     

基于SNMP的网络管理软件的设计与实现

简单网络管理协议SNMP是目前TCP/IP网络中应用最为广泛的网络管理协议,绝大多数网络管理软件都是基于SNMP进行开发的。介绍了SNMP协议的原理,研究了SNMP在Windows系统下的实现方法,并且在VC＋＋6.0的平台下使用WinSNMP API和SNMP＋＋实现了基于SNMP的简单网络管理软件。软件实现了网络命令、扫描、SNMP信息显示、端口流量监测、SET操作、线路状态监视等功能。     

基于TR069的终端管理系统的设计和实现

为了解决SNMP(简单网络管理协议)应用在广域网终端远程管理方面的不足,分析了TR069协议(广域网终端管理协议),探讨了在HTTP(超文本传输协议)上使用简单对象访问协议组件Axis SOAP来实现RPC(远程过程调用)管理终端设备的可行性和优点,提出了一种利用Java实现TR069的系统构架,阐明了具体实现方案和原理.最后,总结了该方法的优点和今后进一步的研究重点.     

嵌入式Linux系统的UPS网络代理卡应用研究

文章运用目前嵌入式开发领域最热门的嵌入式Linux系统和网络管理领域最流行的简单网络管理协议 (SNMP) ,在三星公司的NET Start开发套件基础上 ,构建嵌入式Linux(ucLinux)系统 ,使用简单网络管理协议实现了UPS的网络管理 ,大大缩短了开发周期 ,顺利完成了UPS网络代理卡的开发 ,从而表明嵌入式Linux系统和SNMP协议在嵌入式网络代理的开发方面具有极为广阔的前景。     

嵌人式Linux系统的UPS网络代理卡应用研究

文章运用目前嵌入式开发领域最热门的嵌入式Linux系统和网络管理领域最流行的简单网络管理协议(SNMP)，在三星公司的NET-Start开发套件基础上，构建嵌入式Linux(ucLinux)系统，使用简单网络管理协议实现了UPS的网络管理，大大缩短了开发周期，顺利完成了UPS网络代理卡的开发，从而表明嵌入式Linux系统和SNMP协议在嵌入式网络代理的开发方面具有极为广阔的前景。     

基于SNMP的网络管理在Windows系统中的实现

简单网络管理协议（SNMP）已成为网络管理事实上的工业标准，Windows2000为基于SNMP的网络管理软件的开发提供了一套API接口。本文先讨论了网络管理的一些基本概念，然后重点报告了SNMP网络管理在Windows系统中的实现．最后对SNMP的不足之处进行了探讨。     

基于SNMP协议校园网络管理系统设计与实现

结合高校校网络管理需求,通过对简单网络管理协议（SNMP）工作原理分析和研究,提出了基于SNMP协议网络管理系统的设计思路和编程实现方法。     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.