A Personalized Information Dissemination System Based on How—Net

The information dissemination model is becoming increasingly important in wide-area information systems,In this model,a user subscribes to an information dissemination service by submitting profiles that describe his interests.There have been several simple kinds of information dissemination services on the Internet such as mailing list,but the problem is that it provides a crude granularity of interest matching.A user whose information need does not exactly match certain lists will either receive too many irrelevant or too few relevant messages.This paper presents a personalized information dissemination model based on HowNet,which uses a Concept Network-Views(CN-V) model to support information filtering,user‘s interests modeling and information recommendation.A Concept Network is constructed upon the user‘s profiles and the content of documents,which describes concepts and their relations in the content and assigns different weights to these concepts.Usually the Concept Network is not well arranged,from which it is hard to find some useful realtions.so several views from are extracted it to represent the important relations explicitly.     

Innovative pedagogical practice with ICT in three Nordic countries – differences and similarities

Three Nordic countries, Denmark, Finland and Norway, participated in the IEA SITES 2006 study. All the three countries have launched huge policy and investment programmes to promote digital literacy and readiness for the information age. In relation to the remarkable Finnish Programme for International Student Assessment (PISA) results, it is interesting to see if the Finnish school system may be better suited to ground and contextualize pedagogical practice with Information and Communication Technologies (ICT) than the Danish and Norwegian counterparts. One main difference is that the Finnish system seems to anchor decisions about and interpretations on how ICT should be utilized stronger at the local level than the two other systems. One of the general goals in the policy programmes is to get teachers to innovate with ICT in the classrooms. The Second Information Technology in Education Study (SITES) 2006 indicators for two innovative pedagogical orientations, lifelong learning orientation and connectedness are utilized to compare teachers from the three nations. The main findings is that Finnish teachers are either not differing or they are scoring significantly lower on the two indicators than teachers from Denmark or Norway. The exception is Finnish science teachers who are more inclined towards using ICT in lifelong learning practices than their Danish and Norwegian counterparts. Generally, the Finnish teachers seem to be more autonomous in their pedagogical choices but may also be more conservative than the Danish and Norwegian teachers in making use of ICT.     

微博信息安全管理的制度分析

"微博"一词,已成为网络时代的新名词,它凭借着自身的便捷性、原创性和背对脸的三大特点受到了好评。随着其适用人群的扩增,其实用价值也越来越明显,同时微博的信息安全也就受到了极大关注,而利用制度分析微博信息安全管理也就具有了更加现实的意义,本文正是利用制度分析的方法对微博信息的安全得以实现更加卓有成效的管理进行分析。     

基于统一安全平台下信息报送系统的研究与设计

基于政府机关信息报送的业务需求,提出安全信息报送业务的基本流程,探讨了基于安全平台的信息系统设计思路,给出了总体框架,同时对系统采用的关键技术进行了阐述。     

合作性DTN的基于系统效益的内容分发

近年来在时延容忍网络(delay tolerant network,DTN)中的数据分发成为研究热点.由于DTN节点之间不存在持续的端到端连接,节点通常采用"存储-搬运-转发"的方式进行数据递交.当两个节点相接触时,节点如何为空间有限的缓存选择存储内容是一个关键问题,这关系到整个DTN网络的分发性能.但在分布式动态的DTN环境下,每个节点难以找到全局最优的存储选择.基于这个原因,全局效益最大化问题被转变为每次接触时的效益增益最大化问题,然后将转化后的问题形式化为0-1背包问题,并设计了一种启发式贪婪算法来进行求解,使得每个节点在与其他节点发生接触时,能够依据自身维护的局部网络信息来选取转发内容,从而最大化系统分发效益的增益.此外进一步详细分析了节点维护的网络信息的范围与节点对转发内容选择之间的关系.基于Trace的仿真结果表明,与SocialCast算法相比,启发式算法可以有效地提高节点对订阅内容的接收率和降低接收时延,并且随着节点维护的网络信息范围的增大系统效益也不断增大.     

ICT‐supported pedagogical policies and practices in South Africa and Chile: emerging economies and realities

South Africa participated in all three of the Second International Technology in Education Study (SITES). In the first international study, South Africa was the only developing country, and therefore, stark contrasts were found in the international study between South Africa and the other participating countries. Chile participated in the SITES 2006 as one of a few developing countries making the comparison with South Africa possible. Despite similarities in their contexts and economies, their approach to information and communication technologies (ICTs) in education appears to differ. This difference raised questions about differences in policies and their implementation at school level. This research conducted in South Africa found that the Chilean strategy for developing and implementing their ICT in education appear to be very different with regard to its design, the organization, the strategies adopted, the resources used and, most importantly, their approach to teacher development for implementing ICT. A number of lessons are revealed for the South African policymakers and others from similar developing contexts.     

Information management and organizational processes: an approach through soft systems methodology

Abstract. This paper explores an approach to understanding information provision in organizations which is built around soft systems methodology (SSM). It also, from recent research in both industry and the National Health Service, derives a sense-making framework for work of this kind. A view of the fundamental nature of information systems is presented. This is compatible with SSM, and uses of SSM in information-focused studies are illustrated. These cover the rethinking of the Manufacturing Function in the Shell Group and a number of studies in the NHS concerned with the information implications of current changes. Out of this work, in order to make sense of disparate experiences, a framework is derived which captures three necessary domains (conceptual, organizational, technological) whose interaction defines an organization's response to its information provision.     

Affective e-Learning in residential and pervasive computing environments

This article examines how emerging pervasive computing and affective computing technologies might enhance the adoption of ICT in e-Learning which takes place in the home and wider city environment. In support of this vision we describe two cutting edge ICT environments which combine to form a holistic connected future learning environment. The first is the iSpace, a specialized digital-home test-bed that represents the kind of high-tech, context aware home-based learning environment we envisage future learners using, the second a sophisticated pervasive e-Learning platform that typifies the educational delivery platform our research is targeting. After describing these environments we then present our research that explores how emotion evolves during the learning process and how to leverage emotion feedback to provide adaptive e-Learning system. The motivation driving this work is our desire to improve the performance of the educational experience by developing learning systems that recognize and respond appropriately to emotions exhibited by learners. Finally we report on the results about the emotion recognition from physiological signals which achieved a best-case accuracy rate of 86.5% for four types of learning emotion. To the best of our knowledge, this is the first report on emotion detection by data collected from close-to-real-world learning sessions. We also report some finding about emotion evolution during learning, which are still not enough to validate Kort’s learning spiral model.

农药信息管理系统的研制与应用

应用ＦｏｘＰｒｏ５．０ｆｏｒ Ｗｉｎｄｏｗｓ,将国内外多种农药的名称、理化性质、毒性及用途等资料输入计算机,建成可扩展数据库。本系统具有对农药数据资料的存储、修改、查询及统计分析等功能,不仅能为科学合理地选用农药提供一条新的有效的办法和途径,而豕能为计算机辅助农药设计提供宵药分子结构－毒性／性质库。     

构建我国农业信息保障体系的思考

从农业系统学的角度论述了以农业图书馆为主体 ,构建由农业生物、农业环境、农业技术、农业经济四大信息系统所组成的我国农业信息保障体系的多级网络结构模式     

软计算与硬计算融合的含油气性识别

随着油气勘探领域的不断扩大,测井解释面临的研究对象也越来越复杂,传统的单一基于硬计算或软计算的方法在测井解释中面临严格挑战。提出软计算与硬计算融合的4种模式。运用软计算与硬计算融合的分离模式对某油田Oilsk81、Oilsk83、Oilsk85三口井进行含油气性模式识别,比较结果表明,在这个油区运用软计算方法对含油气性进行模式识别优于硬计算,并且可以识别出较好的测井数据集。     

全球信息栅格体系结构和信息分发管理研究分析

全球信息栅格体系(GIG)是国外最具代表性的军事电子信息系统。通过研究、探讨美军GIG体系结构的内容与发展趋势,并根据目前作战指挥过程中信息处理,特别是信息分发管理存在的问题,结合全球信息栅格的实现对信息分发管理的要求,提出完成信息分发管理所需要实现的功能和所涉及的关键技术。同时结合我国的国情,提出了关于我军信息化建设的几点思考。     

广义计算系统研究

该文简要介绍运用广义计算技术而建立起来的一类人工智能系统──广义计算系统,包括广义计算系统的数学描述,广义计算系统的实现问题和学习问题。     

基于发布/订阅机制的Web服务QoS信息分发模型

QoS感知的Web服务管理和组合的基本问题是如何及时有效地获取Web服务的QoS信息.当前的研究包括基于查询或监视的方法.然而在动态的服务计算环境下,这些方法或多或少存在时效慢、代价高和可扩展性差等问题.提出一个基于发布/订阅机制的Web服务QoS信息分发模型,目标是提供一个在大规模的服务计算环境下可靠、及时地获得Web服务QoS信息的方法.提出一个基于P2P的内容发布/订阅网络,利用专用的集合点和副本机制减少订阅丢失,改善可靠性.利用RP链加快订阅和QoS信息发布.通过支持组合服务的组合QoS订阅,减少通知消息数量,减轻网络负载.仿真实验验证了系统的低成本、有效性和可扩展性.     

农村科技信息12396综合服务平台的构建与实现

该服务平台是为了提高农民应用信息技术的水平和科学种田的素质;加快农业信息服务技术发展,建立健全农业信息网站而建立的。使用wordpress软件,利用php语言,HTML语言以及MySql等建立一个针对农安县的农村科技信息12396综合服务平台。该平台对于提高农民科学种田的素质,使农民掌握农业现代技术,促进精准农业的推广普及,提高农民的收入,发展农村经济,加速农村现代化过程均有着重大意义。     

天基信息传输分发系统应用及其关键技术

天基信息传输与分发系统近年来得到迅速发展,其应用领域越来越广泛,尤其在信息化部队的建设上作用越来越关键。基于美军天基信息传输与分发系统在通信、广播和中继等多个方面的应用,描述了系统的体系结构,总结了引领系统发展的技术方向,指出了系统发展过程中需要重点解决的主要关键技术。为加快部队天基信息传输与分发系统的发展开拓思路,提供参考。     

基于云计算模式的ERP企业管理信息系统分析

对于现代企业来讲,为了实现对企业信息的有效管理,提高企业管理效率,已经开始致力于建立企业内部的ERP管理信息系统。目前国内的大中型企业,很多已经建立了完善的ERP企业管理信息系统。考虑到企业规模的扩大以及企业管理数据的成倍增加,现有的ERP管理信息系统已经显示出一定的局限性。随着计算机技术的飞速发展,云计算的概念逐步得到了推广和应用。基于云计算的特点,ERP企业管理信息系统开始有意识的与云计算概念相结合。本文主要介绍了云计算模式的ERP企业管理信息系统特点和优势,对其应用效果进行了深入的分析。