XML在开放式OLAP系统中的应用

由于数据源的多样化、异构化,用户对OLAP系统的开放性要求也越来越高。一个开放的OLAP服务系统应该能够集成常见的分析数据源、有效管理系统中的元数据并能提供跨平台的数据访问。XML的潜在优势能很好满足开放性要求。研究了开放式OLAP服务系统所提出的新要求,探讨XML在OLAP系统中的应用角色,提出将XML技术用于实现OLAP解决方案所具有的潜在优势,并以开源项目Mondrian为例,介绍了XML在该OLAP系统中的应用。     

基于XML的OLAP信息发布技术

一种新的基于XML信息发布技术的OLAP系统体系结构,解决了系统实现中多维数据集到XML数据的映射算法和XML数据的Internet发布二个关键问题。     

基于XML的松耦合OLAP系统的研究

文章给出了松耦合OLAP应用系统的新概念。它是一个集合了XML、SOAP等技术的新型OLAP应用系统。可在交叉平台以及Internet语言独立的环境中完成客户对OLAP服务器立方体的创建和多维数据查询的操作。文中对此松耦合OLAP系统做了详尽的描述,并给出了实现房地产分析系统中数据集成管理的初步方案。     

CRM系统中基于ASP.NET的OLAP的设计与实现

介绍了客户关系管理（customer relationship management,CRM）、数据仓库和联机分析处理（on-line analytical processing,OLAP）服务,分析了基于数据仓库的CRM系统中OLAP设计的系统架构.基于ASP.NET和SQL Server2000,并综合运用OWC（office web components）、可扩展标记语言（extensible markup language,XML）等相关技术,提出了拓宽OLAP服务域,实现OLAP报表在Web上显示的一个解决方案.说明了系统的部署配置方法和应用程序的构建过程,给出了实现通过内嵌OWC的Web客户端页面,调用XML Web Service,与OLAP服务器建立连接并进行访问的具体方法.     

基于关系数据库和XML的OLAP建模方案

OLAP系统运行的基础是多维数据模型。以快速、准确、灵活地构建多维数据模型为目的,提出了一种基于关系数据库和XML的OLAP建模方案。该建模方案将OLAP的建模任务分为两个阶段:存储层建模和应用层建模。在存储层,使用关系数据库,按照"星型图"方法建立具备多维特性的关系数据模型;在应用层,设计XML Schema,描述多维数据立方体及物理映射。运用建模方案,可以有效提高OLAP多维数据建模的效率和效果。     

一种OLAP概念建模的研究与实现

OLAP已成为决策支持的一种重要工具。鉴于对多种数据源集成和易用性的要求越来越高,文中提出了一种轻型OLAP的框架,它能利用XML在表示维度数据的优势,提供对XML数据源的集成,最终利用UML类图提供概念上的建模。从而让用户以统一、透明的方式从概念上完成建模,方便使用OLAP。     

一种OLAP概念建模的研究与实现

OLAP已成为决策支持的一种重要工具.鉴于对多种数据源集成和易用性的要求越来越高,文中提出了一种轻型OLAP的框架,它能利用XML在表示维度数据的优势,提供对XML数据源的集成,最终利用UML类图提供概念上的建模.从而让用户以统一、透明的方式从概念上完成建模,方便使用OLAP.     

基于XML及软总线的移动OLAP

将XML及软总线的概念应用于OLAP系统中，提出了一种移动分析业务（MobileOLAP)模型。在新的模型中，决策者能在任何可以入网的设备（如掌上电脑、手机）上进行OLAP操作，从而方便决策者随时随地获取决策所需要的信息。     

基于XML数据立方的面向对象扩展

本文是对基于XML的数据立方数据模型的面向对象的实现，通过对数据仓库技术，面向对象技术和XML技术的结合的探讨，扩展了XML Schema，从而为基于WEB数据仓库的应用提供了一种新的表示和实现方法，解决了数据仓库中模式演化所带来的重组问题，通过与面向对象技术的结合使用，把数据仓库变成为数据立方和OLAP方法的仓库，这种数据仓库的实现方案，保证了数据仓库系统的稳定性，灵活性和可扩展性，适应了新一代WEB应用的需要。     

基于B/S结构的OLAP技术的研究与实践

基于C/S架构的OLAP系统中存在的缺陷已经阻碍了OLAP技术的发展.通过对 Web方式下数据库执行方式的比较,采用页面嵌入控件的方式对OLAP系统架构进行改进,实现Web环境下对OLAP系统的访问,并针对该方式中较流行的OLAP系统架构方案的不足,提出新的解决方案,解决跨平台问题,能更好地普及和应用OLAP技术.     

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.