COM/DCOM技术及应用

介绍了COM /DCOM的技术原理 ,分析其标准、结构、特点及其应用 ,提出了基于COM的聊天室设计模型 .     

对两阶段提交协议的一些改进

两阶段提交协议在分布式数据库系统事务处理中得到广泛应用,但由于其存在易于陷入阻塞状态这一固有的缺陷,影响了分布式数据库系统的效率。     

论中间件技术及应用

本文首先对中间件的关键技术和特点做了分析介绍,然后以中间件技术在某业务支撑系统中的应用为例,重点分析了中间件在现代企业业务支撑系统中的重要作用。     

Connectionism and learning to read: Steps towards a psychologically plausible model

We consider the prospects and need for a psychologically plausible connectionist model of the development of word recognition skills. We present an outline of the Seidenberg and McClelland (1989) distributed, developmental model of word recognition and naming. We emphasize certain incompatibilities between this model and the assumptions underlying it and psychological evidence from studies of children learning to read. In particular, we emphasize the importance of phonological skills as precursors and facilitators of learning to read. We argue that it may be possible to develop a connectionist model of the development of word recognition skills which, by having a built in knowledge of phonology, will be more consistent with evidence from studies of both normal and dyslexic children.     

Global term weights in distributed environments

This paper examines the estimation of global term weights (such as IDF) in information retrieval scenarios where a global view on the collection is not available. In particular, the two options of either sampling documents or of using a reference corpus independent of the target retrieval collection are compared using standard IR test collections. In addition, the possibility of pruning term lists based on frequency is evaluated.     

智能建筑中水源热泵系统技术探讨

本文分析了水源热泵系统的组成及工作原理,介绍了集散型控制系统的技术基础,进一步研究了基于分布式控制的水源热泵空调集散型控制系统。     

分布式入侵检测系统的协作交互研究

组件之间的信息交互及协作分析是分布式入侵检测系统的关键问题,在基于层次化协作模型分布式入侵检测系统的基础上,分析了检测组件的信息交互需求,从静态分析的角度提出了扩展入侵检测消息交互格式,针对不同类型攻击行为的组件交互及协作流程,进行了动态的流程分析,为检测系统实现高效的入侵事件通报、审计数据收集、入侵事件协作检测和入侵行为分布式响应提供了标准的表述格式和流程定义.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

中间件技术的现状及其发展

为了解决分布式环境问题,使得中间件技术受到人们广泛的关注。从中间件技术的概念、分类、特点、优势与应用几个方面阐述了中间件技术的现状,并同时提出了中间件今后发展的趋势。