图像切割法在缓存服务器中部署策略

为了解决内容分发网络中因缓存服务器部署位置而导致的网络延时等问题,同时改进内容分发网络中缓存服务器的合理化部署策略,论文借鉴网络仿真图像轻点匹配算法的思想,提出了一种CDN图像切割的多层K划分模式,通过理论分析和计算,同时找到了一种适合CDN网络环境的最大化边缘切割的K路KL(Kernighan-Lin)细化算法,它是根据物理部署点抽象出网络节点拓扑图,再通过相应的算法进行粗化和细化阶段的处理,使节点部署达到最佳化,最后通过算法分析证明了在解决CDN缓存服务器部署问题上,多层K划分算法是一种可靠高效的方法。     

全国计算机等级考试辅助报名系统设计

在全国计算机等级考试（National Computer Rank Examination,NCRE）报名过程中,现在依然有部分院校或机构完全依赖单机报名系统进行报名信息采集和管理。这种报名方式存在两个主要问题：工作人员的工作量大、效率低;考生觉得不便。有效的解决方式之一是使报名过程网络化。本文对NCRE报名过程特点进行分析,设计以网络为辅助的NCRE报名系统。实践证明：该系统是单机报名系统的得力补充,在很大程度上解决了单机报名系统中工作量大、效率低、方便性差的问题。     

NCRE上机考试服务器设置经验谈

本文重点介绍了NCRE上机考试网络环境中服务器的设置经验--使用windows 2000的命令编写的批处理文件设置服务器,同时,也简单介绍了手工设置和服务器设置程序设置,最后,对这些设置方法进行了比较分析.     

基于SSM框架的考试报名系统的设计与实现

随着互联网的迅速普及和网络技术的飞速发展,教育考试开始建立线上考试报名系统,如全国计算机等级考试(NCRE)、大学生网上考试报名等。实施过程中,信息收集和存储产生了许多新问题。基于此,运用SSM框架设计并实现了一款通用的考试报名系统,对信息收集和存储做出相应优化设计,从而满足不同类型的线上报名需求,同时,介绍了如何通过SSM框架设计并实现通用的考试报名系统。     

基于PXE远程启动技术的网络考试系统研究

本文介绍了如何将PXE远程启动技术与网络考试相结合，实现不进入无盘工作站的WINDOWS系统，直接进行考试的方案。大大减少了无盘工作站的软件安装和系统维护，并很大程度上提高了考试系统的安全性，减少了标准化考试环境的资金投入。     

教与学

重大消息:2008年NCRE考试新变化2008年上半年NCRE(全国计算机等级考试)即将开始,教育部考试中心已对NCRE在考试科目、考核内容、考试形式等方面进行调整。包括新增部分考试科目,并且改变了考试形式,考试时间变化:上半年笔试考试时间调整为四月     

使用Autoit脚本在虚拟内存盘快速设置计算机考试模拟系统

该文主要介绍了如何在windows服务器上创建虚拟RAM内存盘,用Autoit脚本快速设置计算机等级考试模拟系统,提供给学生进行计算机等级考试模拟练习。用Autoit脚本实现了自动格式化内存盘以便清除学生模拟考试数据、创建考试用户文件夹、以及自动设置服务器共享文件权限,让服务器提供更高速、稳定的模拟考试系统环境。     

基于.NET三层架构的在线考试系统设计与实现

在线考试是建立在联网上的应用系统,客户端的配置极为简单,使考试不受地域的局限。该在线考试系统是利用微软.net三层架构技术并使用VS2005和Sql Server2000数据库编写的B/S结构的网络应用程序。它具有使用用简单、部署方便、扩展性强等特点。     

计算机网络考试系统的二次开发

介绍了万维网络考试系统的基本功能;为满足实践教学中对网络考试的实际要求,对该网络考试系统进行了二次开发：增加了文字录入时间设定;修改原试题中不合理的分数分配;新增了试题导入功能;完善了系统自动阅卷和试卷分析统计功能。提出了在二次开发过程中的需要注意的问题。该二次开发系统满足了教学过程的实际需要,具有很好的实用性,并为同类系统的二次开发提供了一种解决方案。     

网络用户权限设置和映射盘动态管理的系统设计与开发

在校园网教学环境中,对网络中用户访问远程服务器数据的权限进行自动设置,根据学生的学号动态地生成对应的映射盘,特别适合在教学和考试环境中进行数据管理。     

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.