新世纪构建第三代分布式图书馆自动化系统

介绍了先进的多层结构分布式图书馆自动化系统, 并给出了构建多层结构分布式图书馆自动化系统的实现技术。     

基于信息融合的分布式入侵检测体系结构研究

随着计算机与网络技术的发展,入侵技术也越来越先进。许多入侵行为都具备反检测的能力,这些行为会模仿被入侵体系的正常用户行为或通过多台主机联合攻破被入侵系统。针对较复杂的入侵行为,仅靠一个传感器来提供信息很难与正常用户行为进行识别,必须通过多传感器信息融合的方法来提高对入侵的识别能力,同时降低误判率。     

A completed research and development work project in school: The teachers’ learning and possibilities, premises and challenges for further development

The article is based on a follow-up study of a research and development work project with school leaders and teachers conducted in a Norwegian lower secondary school. The purpose is to present an understanding of what the practitioners find they have learned during the project and how they experience the situation with regard to development about two years after the project has ended. The study concludes that continuity in both leadership and the teaching staff means that the involved practitioners can develop an identity with a common objective over time, and that development can then be seen as improvement.     

基于企业Intranet的信息集成框架设计

如何实现CIMS的信息集成是企业Intranet架构的关键所在,传统的C/S体系结构由于其维护性差、安全性不高等缺点已经不能适应企业发展的需求,采用一种基于浏览器及分布式对象计算技术的多层框架结构来实现信息集成,具有较好的可扩展性、安全性和可靠性,并能很好地适应企业分布式异构环境。     

基于资源分类信息树的教育资源元数据分布式存储

在教育资源大规模应用系统中,除了资源数据存储外,资源元数据信息的更新、获取也会成为系统的瓶颈。我们提出了一种利用资源分类信息树来辅助教育资源元数据分布式存储的策略,并就其各种操作进行了研究。该策略除拥有集中式存储的资源查全、查准特性外,还拥有灵活的扩展性,能应对大规模用户访问。     

新能源并网发电系统的关键技术和发展趋势

随着以新能源及可再生能源为代表的微型能源发电技术、分布式发电技术以及储能技术的飞速发展,新能源并网发电正逐渐成为研究的热点。首先介绍了主要新能源分布式发电技术,进而给出了微网的相关概念及其基本结构,阐述了新能源并网发电系统中的关键技术。最后提出了新能源并网发电系统的发展趋势是分布式混合能源系统和在坚强智能电网框架下的智能微网,并探讨了在研究中需要重点解决的理论和技术问题。     

How distributed leadership can make a difference in teachers' organizational commitment? A qualitative study

The present study explores the relation between distributed leadership and teachers' organizational commitment. Semi-structured interviews with teachers and school leaders of secondary schools were conducted. A comparative analysis of four schools with high and four schools with low committed teachers was carried out. Findings revealed differences in the leadership practices which influenced organizational commitment. The leadership practices include the quality and distribution of leadership functions, social interaction, cooperation of the leadership team, and participative decision-making. Teachers reported being more strongly committed to the school if the leaders were highly accessible, tackled problems efficiently or empowered teachers to participate, and frequently monitored teachers' daily practices.     

基于Web服务的分布式检索

论文阐述了基于Web服务的分布式检索的工作原理，并结合图书馆的实际应用提出了一个基于Web服务的分布式检索系统的体系结构。     

容错和负载平衡能力在分布式系统中的应用

本文介绍了容错和负载平衡能力在分布式系统中的重要性,以分布式煤炭生产信息系统为例,详细说明了使用Delphi的TSlmpleObjectBroker组件实现系统容错和平衡服务器负载的技术。     

Control of PDE-ODE cascades with Neumann interconnections

We extend several recent results on full-state feedback stabilization and state estimation of PDE-ODE cascades, where the PDEs are either of heat type or of wave type, from the previously considered cases where the interconnections are of Dirichlet type, to interconnections of Neumann type. The Neumann type interconnections constrain the PDE state to be subject to a Dirichlet boundary condition at the PDE-ODE interface, and employ the boundary value of the first spatial derivative of the PDE state to be the input to the ODE. In addition to considering heat-ODE and wave-ODE cascades, we also consider a cascade of a diffusion-convection PDE with an ODE, where the convection direction is “away” from the ODE. We refer to this case as a PDE-ODE cascade with “counter-convection.” This case is not only interesting because the PDE subsystem is unstable, but because the control signal is subject to competing effects of diffusion, which is in both directions in the one-dimensional domain, and counter-convection, which is in the direction that is opposite from the propagation direction of the standard delay (transport PDE) process. We rely on the diffusion process to propagate the control signal through the PDE towards the ODE, to stabilize the ODE.