基于XML的异构数据库访问的研究

采用XML文档作为底层数据交换的载体,提出了基于中间件技术访问异构数据库的模型,并根据应用需求,介绍了Internet/Intranet环境下访问异构数据库的三层体系结构,另外还详细介绍了模型实现的一些关键技术和算法。     

基于SOA异构数据交换平台的设计和实现

随着信息化建设的发展,迫切需要对各种应用系统进行资源整合,对分散异构的多数据源实现统一的数据交换。文章通过SOA提供的标准化架构,在应用系统间建立起了一个松散耦合"服务器+代理"的数据交换平台,实现异构数据的交换与数据共享。     

基于web services构建电子政务信息资源目录服务模型

为更好地实现分布式环境下的异构政务信息资源间透明性交互与共享,提出了一种基于政务信息资源目录服务的信息资源整合方案。针对目前政务资源整合现状,基于Web服务思想以及政务资源目录组织结构构,建政务资源目录服务模型,并结合信息资源注册及发现过程,对模型各部分组成、功能和构建方法进行了详述,最后对模型特点加以概括。     

基于XML技术的物流价值链信息集成研究

XML标准作为新一代的数据交换标准,具有很多优点。采用XML标准的物流价值链信息系统相互间可以实现异构的数据交换。本文基于XML技术研究电子商务环境下物流价值链信息集成,重点研究基于XML技术的物流价值链信息系统整体结构,以及集成数据的访问机制。最后通过实例说明XML技术在物流价值链信息系统中集成多个数据源的具体应用。     

基于ASP模式及XML技术的企业物流信息集成研究

XML标准作为新一代的数据交换标准。具有很多优点。采用XML标准的企业物流信息系统相互间可以实现异构数据源的集成。本文基于ASP模式和XML技术研究电子商务环境下的企业物流信息集成．重点研究了基于ASP模式的企业物流信息系统的整体结构．以及集成异构数据源的访问机制。最后通过实例说明了XML技术在企业物流信息系统中数据集成的具体应用。     

面向SCM的物联网动态服务架构及协同应用

基于供应链集成化业务场景、持续分析了供应链以及增强上下游快速响应能力的需求,为了实现集成化供应链平台的业务协同合作与信息共享,并构建业务需求驱动的物联网关键技术融合体系,采用以动态服务为中心的物联网多层体系结构,通过物联网应用中间件技术以及多层关键技术融合与集成应用,实现由业务驱动的海量数据的采集、传输、处理与整合,采用面向服务的体系结构SOA技术及Web服务技术,支撑分布式SCM应用软件借助中间件技术实现物联网在异构环境下动态的服务架构及其协同应用。     

基于SOA的教育资源集成系统研究

我国远程教育发展迅速,随之而来产生了日益增长的信息共享和业务整合的需求,如何更好地实现教育资源集成成为备受关注的问题。本文提出一种基于SOA架构和Web服务的教育资源集成模型——ERI-WS模型（Education Resources Integration Basedon Web Service and SOA）,可以有效地集成各类异构教育资源应用。     

基于XML和Web服务的电子商务应用系统研究

基于XML/Web服务的电子商务应用系统克服了传统电子商务应用系统的不足,能满足远程数据交互、异构平台间相互通讯以及穿越防火墙等一系列复杂的功能需求,充分体现了XML内容与形式相分离的优点以及Web服务的新型组件化思想,实现了高效的XML解析其与系统集成,在电子商务这样涉及大量数据的分布式应用中,XML和Web服务相结合构建电子商务应用系统具有较大的技术优势。     

大数据时代电力企业财务管理存在问题和解决对策

随着"云大物移"技术的深化应用,电力行业的信息化逐渐步入到由复杂及异构数据源广泛存在和驱动的时代。随着大数据技术越来越成熟,为人们提供了一种财务管理的新方法。文章分析了大数据的应用给电力企业的财务管理带来新的挑战,指出了新环境下财务管理存在的新问题,并对大数据环境下如何加强财务管理进行了再思考。     

基于Web服务的第三方物流动态模型研究

指出第三方物流运作过程中存在内外部系统平台及数据异构问题,信息共享不畅,Web服务是一种处理不同系统平台及异构数据的有效手段,基于WEB服务构建了第三方物流系统动态模型,并对模型的实现技术进行阐述,对物流信息共享平台的建设具有一定的价值。     

基于XML的工程造价管理系统的设计与实现

研究了XML(eXtensible Markup Language可扩展标记语言)技术结合其他编程语言实现了基于XML的异构数据源集成,并用XML应用程序SVG(Scalable Vector Graphics可缩放矢量图形)、SMIL(Synchronized Multimedia Integration Language同步多媒体集成语言)和CDF(Channel Definition Format频道定义格式)分别实现了工程造价管理系统中的矢量统计图、多媒体信息发布和Web广播。满足了用户对广泛的异构数据交换、复杂的数据显示、多媒体的信息发布和预定的要求。     

Web数据挖掘中XML技术的应用研究

随着网络技术的发展,网上的信息资源越来越丰富,怎样对Web上海量的数据信息进行深层次的应用成了当今数据库技术的研究热点。文章针对Web上数据的特点和目前Web数据挖掘存在的挑战,结合XML语言的技术特点,主要探讨了XML技术在Web数据挖掘中的重要应用。     

A service-based framework for pharmacogenomics data integration

Data are central to scientific research and practices. The advance of experiment methods and information retrieval technologies leads to explosive growth of scientific data and databases. However, due to the heterogeneous problems in data formats, structures and semantics, it is hard to integrate the diversified data that grow explosively and analyse them comprehensively. As more and more public databases are accessible through standard protocols like programmable interfaces and Web portals, Web-based data integration becomes a major trend to manage and synthesise data that are stored in distributed locations. Mashup, a Web 2.0 technique, presents a new way to compose content and software from multiple resources. The paper proposes a layered framework for integrating pharmacogenomics data in a service-oriented approach using the mashup technology. The framework separates the integration concerns from three perspectives including data, process and Web-based user interface. Each layer encapsulates the heterogeneous issues of one aspect. To facilitate the mapping and convergence of data, the ontology mechanism is introduced to provide consistent conceptual models across different databases and experiment platforms. To support user-interactive and iterative service orchestration, a context model is defined to capture information of users, tasks and services, which can be used for service selection and recommendation during a dynamic service composition process. A prototype system is implemented and cases studies are presented to illustrate the promising capabilities of the proposed approach.     

异构数据库数据交换平台的总体设计

介绍异构数据库数据交换平台总体设计,阐述异构数据库数据交换平台特点,以基本上解决＂信息孤岛＂问题。     

“校园数字化”中异构数据库集成技术浅析

随着数字化、网络化时代的来临,校园数字化已经迫在眉睫。文章介绍了数字化校园中数据集成的意义及对数据集成技术进行分析,对于校园中形式各异的数据库,如何将这些异构的数据集成起来进行信息共享,防止出现"信息孤岛",是目前校园所要解决的首要问题。文章提出了一种基于XML的异构数据集成方案,讨论了目前异构数据集成的一般框架。     

物流信息交换中间件研究

物流信息交换是物流信息化的关键技术，异构数据交换更是物流信息共享的难点。当前，各种物流信息管理系统数据格式差异很大，物流信息全部标准化的时机尚不成熟，物流信息管理系统的稳定性与独立性又要求信息交换能独立于系统之外，物流信息交换中间件是最好的选择论文从分析物流信息构成出发，研究物流信息交换的需求、方式，进而给出了一种物流信息中间件解决方案     

Exploiting semantic linkages among multiple sources for semantic information retrieval

The vision of the Semantic Web is to build a global Web of machine-readable data to be consumed by intelligent applications. As the first step to make this vision come true, the initiative of linked open data has fostered many novel applications aimed at improving data accessibility in the public Web. Comparably, the enterprise environment is so different from the public Web that most potentially usable business information originates in an unstructured form (typically in free text), which poses a challenge for the adoption of semantic technologies in the enterprise environment. Considering that the business information in a company is highly specific and centred around a set of commonly used concepts, this paper describes a pilot study to migrate the concept of linked data into the development of a domain-specific application, i.e. the vehicle repair support system. The set of commonly used concepts, including the part name of a car and the phenomenon term on the car repairing, are employed to build the linkage between data and documents distributed among different sources, leading to the fusion of documents and data across source boundaries. Then, we describe the approaches of semantic information retrieval to consume these linkages for value creation for companies. The experiments on two real-world data sets show that the proposed approaches outperform the best baseline 6.3–10.8% and 6.4–11.1% in terms of top five and top 10 precisions, respectively. We believe that our pilot study can serve as an important reference for the development of similar semantic applications in an enterprise environment.     

QoS-aware middleware for web services composition: a qualitative approach

Web services exhibit major industrial benefit by their ability to participate in composition processes. Web services composition allows for automated exchange of information among remote processes through the service interface. A well-established end-to-end QoS infrastructure among the involved processes precludes confusion among the developers, vendors and consumers. Most of the research work conducted in this domain has focused on functional QoS requirements such as service response time, delay, cost, etc. This paper elaborates the QoS of web services from the perspective of data freshness and accuracy. Towards this aim, the ‘Region Switching’ (RS) algorithm is introduced in this paper. Within the context of the multiple web services composition scenario, the RS-algorithm allows for accurate identification of the point of information change and the appropriate re-computation over the subset of the pre-established, global service execution plan. Thereafter, a mathematical model is presented to verify the need for re-computation based on certain estimated factors, computed thresholds, and the model design. Such a selective re-computation is worth considering since some services may take a significant amount of time to produce results where a slight change to the information set might not alter the outcome of the service. The proposed concept is implemented by utilising and extending the WS-Notification specification in order to elaborate a middleware that is capable of sensing and routing information change at the level of web services using the publish-subscribe mechanism. The contribution of this paper is threefold. First, it highlights the importance of qualifiable QoS aspect related to the issue of web services composition and monitoring. Second, it describes an algorithm capable of capturing and reflecting the state of web services involved in a composition process, thereby achieving higher QoS. Finally, the paper illustrates the use and extension of the WS-Notification concept in building such systems that would deliver up-to-date information to the user through selective re-computation of the web services composition plan.     

网站Web日志数据预处理模型的建立

文章对Web日志数据的预处理进行研究,建立了一个通用的基于Web日志数据预处理的模型。此模型主要包含数据清理、用户识别、会话识别、路径补充、格式化5个基本步骤。研究中,在用户识别步骤加入了时间维度,基于此实现的算法在一定程度上提高了Web日志中用户识别的准确度。经过预处理之后,Web日志数据由原来的半结构化被转换成结构化,并存储在数据库中,以便后期Web挖掘的开展。实践证明,该模型是可行的,并具有良好的可扩展性。