语义网中基于OWL DL的本体模型研究

本文探讨了语义Web中本体Ontology模型的设计.通过研究RDF和RDFS,以及语义Web对信息语义的组织方式,阐述了基于OWL DL在语义Web中建立本体模型的方法.在此基础上,探讨了本体语义模型的结构并搭建了本体语义模型的框架.     

扩展BPEL4WS实现基于语义的服务流程动态细化

越来越多的企业采用面向服务的架构来构建其信息基础设施,并通过执行Web服务流程来实现其业务逻辑。然而,当前作为工业界标准的服务流程建模语言BPEL4WS只能支持非常有限的运行时动态性,难以适应复杂多变的业务需求。针对这一问题,提出了在BPEL4WS及其执行引擎之上,实现基于语义的服务流程动态细化的机制——在BPEL4WS中增加目标类型的活动以及流程的语义描述；扩展现有BPEL4WS执行引擎使之能够执行带有目标活动的流程,并能够根据目标描述与流程的数据内容,在运行时为目标活动匹配与绑定子流程。     

基于Proxy模式的Ajax和Web Services框架研究

Ajax是一种创建交互式网页应用的网页开发技术,Web Services是一种构建应用程序的普通模型,介绍了Ajax和Web Services技术及其原理,总结并分析了目前二者集成的Web框架,指出了框架所存在的缺陷,提出了一种基于Proxy模式的集成框架.     

Web文本挖掘及其分类技术研究

本文以Web挖掘为基础。首先,从定义、功能、过程3方面介绍了Web内容挖掘中的文本挖掘;其次,重点探讨了Web文本挖掘的两种重要功能——分类及其它们常用的算法,并分别对算法做了比较;最后,得出结论并进行了展望。     

A Scalable Peer-to-Peer Web Services Overlay for Semantic Discovery

The growing number of web services advocates distributed discovery infrastructures which are semantics-enabled. We introduce a novel approach for semantic discovery of web services in structured P2P-based （Peer-to-Peer） registries. We partition concepts into different CGs （Concept groups） and index these ordered concept sets in a two-phase semantic routing mechanism. Each node and query has one concept set as its unique ID. For each concept in the query, current node first route the query to a node with nodeID that shares a prefix as long as with the query, but a longer CG. Second, the query will be routed to a node sharing a longer prefix than that of the current node. Combining with semantic similarity calculation, our proposal guarantees that most existing services matching a query will be found with bounded costs in terms of number of nodes involved. The scalability and reliability of our approach are also confirmed through emulation tests.     

基于Web Service的移动式医疗信息系统研究与设计

为了使医生、护士和管理人员能使用安全、便捷地移动医疗信息系统,达到普遍地提高医疗服务质量的目的,研发了移动式的医疗信息系统,采用了Web Service技术,引入了平板电脑、PDA等硬件。开发相应的设备软件系统,并在医院进行了试用实验,获得了满意的结果。得到在移动医疗信息系统中建立基于Web Service的数据服务接口,能满足临床诊疗、科研和管理对于医疗信息的安全访问的结论。     

WCDMA HSDPA数据业务优化

首先针对HSDPA数据业务下载速率慢的常见原因进行研究,从UE终端、RAN和核心网等方面分析了HSDPA下载问题的解决思路;其次对具体的案例进行分析;最后详细说明了HSDPA数据业务优化的方法。     

网页交互中的虚拟情境体验

三维虚拟情景建构出来的生动逼真的虚拟界面,被越来越多的行业所认可,也给网页交互提供了新的可能。文章以用户身份针对存在的问题对网页交互中的虚拟体验进行研究和分析探索,为网页交互领域的新探索提供一些指引。     

On the service performance of alternative shipment consolidation policies

In order to compare the performances of alternative shipment consolidation policies, we develop closed-form expressions of the distribution of the maximum waiting time and the average order delay. We examine the tradeoff between the expected delivery frequency, as measured by the expected shipment consolidation cycle length, and the average order delay. The previous analytical results regarding shipment consolidation are aimed at optimizing the performances of alternative policies using cost-based criteria whereas our results are useful under service-based criteria.     

Optimizing daily agent scheduling in a multiskill call center

We examine and compare simulation-based algorithms for solving the agent scheduling problem in a multiskill call center. This problem consists in minimizing the total costs of agents under constraints on the expected service level per call type, per period, and aggregated. We propose a solution approach that combines simulation with integer or linear programming, with cut generation. In our numerical experiments with realistic problem instances, this approach performs better than all other methods proposed previously for this problem. We also show that the two-step approach, which is the standard method for solving this problem, sometimes yield solutions that are highly suboptimal and inferior to those obtained by our proposed method.