基于Java移动代理的Web服务器负载监控系统

本文分析了现有C/S模式下Web服务器负载监控系统存在的缺陷,在此基础上,给出了一种基于Java移动代理的Web服务器负载监控系统实现方案,并且从总响应时间和程序大小两方面对该监控系统的性能进行了评估。     

基于Java移动代理的Web服务器负载监控系统

本文分析了现有C/S模式下Web服务器负载监控系统存在的缺陷,在此基础上,给出了一种基于Java移动代理的Web服务器负载监控系统实现方案,并且从总响应时间和程序大小两方面对该监控系统的性能进行了评估.     

基于Web服务器的无线视频监控系统的设计

给出了一种应用嵌入式Web服务器、客户端Socket通信和CGI程序实现无线视频监控的解决方案。首先简要介绍了系统硬件和软件的周边环境,在此基础上分析了客户端浏览器、Web服务器和CGI程序三者关系并提出了基于嵌入式Web服务器无线视频监控系统用户应用软件的实现方案,通过系统测试,证明该方案的可行性,为进一步提高嵌入式技术在无线视频监控系统领域中的应用提供了借鉴。     

基于TCP/IP的网络通信及其应用

介绍了一种基于Web的远程监控系统的体系结构及解决方案,给出了在某翻水站远程监控系统中的应用实例和基于TCP/IP协议的WinSock网络通信主要程序。     

基于嵌入式Web的远程数据监控系统研究

针对传统监控方案中PC监控服务器及C/S监控模式的弊端,设计了一种基于B/S模式,以嵌入式系统为服务器的远程监控解决方案。采用TI高性能处理器TMS320DM6446为硬件核心,嵌入式Web服务器为软件核心,综合嵌入式软硬件开发技术,开发了本监控系统。服务器端数据库接收存储下位机采集发送过来的各种现场数据,Web服务器通过CGI程序调用显示,同时可以发送控制指令。远程客户端通过Web实时监控现场数据。测试结果表明,该系统运行稳定,操作方便,达到了预期目的。     

基于Socket通信的工业机器人监控系统研究

针对Epson-G6和Staubli-TX90工业机器人,研究一种基于Socket通信的工业机器人监控系统;系统分为本地监控端和Web远程监控端;基于TCP协议和Socket通信技术,编写了机器人控制器服务端程序和MFC类库开发的客户端程序,客户端分为通讯功能模块,末端坐标轨迹存储模块和基于OpenGL类库的运动姿态展现模块;在此基础上, 基于J2EE架构和WebSocket通信协议编写了Web远程监控端程序,分为用户管理模块和实时监控模块;系统实现了机器人末端坐标轨迹的采集并远程存储至PostgreSQL数据库,同时通过逆运动学计算展现了机器人三维运动姿态,并在Web页面以动态曲线方式监控机器人的末端坐标轨迹。     

基于LonWorks和Web的电梯群远程监控系统

本文设计了LonWorks总线构成的电梯群网络的远程Web监控方案,着重论述了对LonWorks控制网络进行Web监控的原理,以及LonWorks控制网络与信息网络融合中信息传输的关键技术,并给出了工作在从B方式下Host型智能节点的软硬件设计,以及实现Web监控的程序关键。     

机房环境设备的远程监控系统设计

结合机房环境设备的管理需要,分析了远程监控系统的特点,提出基于嵌入式Web服务器的远程监控系统设计思路、体系架构方法。结合CGI程序的设计,着重探讨了嵌入式Web服务器的实现方法。     

基于网络的实时监控图形显示技术的研究

本文对基于Web环境下的工业数据图形的实时监控技术进行了探讨,主要讲述基于ActiveForm方式的工业监控图形显示技术,详细讨论了Web程序与数据库相连的问题,并给出了具体示例。并介绍其它网络化监控图象显示技术和方法,对这些技术的特点进行比较。     

基于嵌入式Web的远程监控系统设计

本文结合机房环境设备的管理需要,分析了远程监控系统的特点,提出基于嵌入式Web服务器的远程监控系统设计思路、体系架构方法,并对基于OPC技术的互联与基于嵌入式Web服务器的互联作了简要对比。文章结合CGI程序的设计,着重探讨了嵌入式Web服务器的实现方法。     

Detecting and representing relevant Web deltas in WHOWEDA

In this paper, we present a mechanism for detecting and representing changes, given the old and new versions of a set of interlinked Web documents, retrieved in response to a user's query. In particular, we show how to detect and represent Web deltas, i.e., changes in the Web documents that are relevant to a user's query in the context of our Web warehousing system called WHOWEDA (Warehouse of Web Data). In WHOWEDA, Web information is materialized views stored in Web tables in the form of Web tuples. These Web tuples, represented as directed graphs, can be manipulated using a set of Web algebraic operators. In this paper, we present a mechanism to detect relevant Web deltas using Web algebraic operators such as the Web join and the outer Web join. Web join is used to detect identical documents residing in two Web tables, whereas, outer Web join, a derivative of Web join, is used to identify dangling Web tuples. We show how to represent these changes using delta Web tables. We develop formal algorithms for the generation of delta Web tables identifying Web documents which have been added, deleted, or modified since the last query.     

Using Policies to Manage Composite Web Services

When no single Web service can fulfil a user's request, providers often turn to composite Web services. However, developing a composite Web service is not simple and deploying the composition specification at runtime consists of several processes. Developers and deployers of composite Web services can use policies in various scenarios, from the announcement of Web services to the compatibility between Web services and composite Web services. Mapping guidelines for a Web service's behavior to policies can ensure an individual Web service's smooth engagement into a composite Web service     

Semantic Web search based on ontological conjunctive queries

Many experts predict that the next huge step forward in Web information technology will be achieved by adding semantics to Web data, and will possibly consist of (some form of) the Semantic Web. In this paper, we present a novel approach to Semantic Web search, called Serene, which allows for a semantic processing of Web search queries, and for evaluating complex Web search queries that involve reasoning over the Web. More specifically, we first add ontological structure and semantics to Web pages, which then allows for both attaching a meaning to Web search queries and Web pages, and for formulating and processing ontology-based complex Web search queries (i.e., conjunctive queries) that involve reasoning over the Web. Here, we assume the existence of an underlying ontology (in a lightweight ontology language) relative to which Web pages are annotated and Web search queries are formulated. Depending on whether we use a general or a specialized ontology, we thus obtain a general or a vertical Semantic Web search interface, respectively. That is, we are actually mapping the Web into an ontological knowledge base, which then allows for Semantic Web search relative to the underlying ontology. The latter is then realized by reduction to standard Web search on standard Web pages and logically completed ontological annotations. That is, standard Web search engines are used as the main inference motor for ontology-based Semantic Web search. We develop the formal model behind this approach and also provide an implementation in desktop search. Furthermore, we report on extensive experiments, including an implemented Semantic Web search on the Internet Movie Database.     

一种P2P环境中基于语义的Web服务组合方法

Web服务组合研究是Web服务领域一个研究热点。本文利用0WL-S语言对Web服务进行描述,提高Web服务的机器可理解性,并利用语义信息进行Web服务组合操作。文中提出一个在JXTA环境中实现Web服务组合的模型,在其上实现了一个基于语义的Web服务组合方法,并通过一个简单的实例说明语义Web服务组合的具体过程。     

基于结构一致和特征学习的网页信息标签提取

网页信息指网页的正文、标题、发布时间、媒体等,每个信息都存在于HTML文档特定的标签中,自动获取这些标签可以实现在相同模板下的网页信息自动提取,对于大规模抓取网页内容有很大帮助。由于在相同模板下不同网页之间结构一致,网页信息有一定统计特征,提出了一种基于结构对比和特征学习的网页信息标签自动提取算法。该算法包含三个步骤：网页对比、内容识别和标签提取。在51个模块下对1?620个网页进行测试,实验结果表明,通过提取标签获取网页信息不仅速度快,而且抓取的内容更加准确。     

Web服务性能优化的研究

Web服务是目前互联网上一种日益重要的分布式计算技术模式。随着Web服务技术在电子商务、电子政务中的广泛应用,Web服务性能引起了广泛的关注,并成为决定Web服务能否进一步得到广泛应用的关键因素之一。在分析Web服务性能现状的基础之上,从改善Web服务性能的目标出发,结合Web服务调用模型,分服务传输、SOAP协议实现、Web服务运行环境三个层次综合分析了影响Web服务性能的因素,提出了一些Web服务性能优化的策略,针对每个层次分析了Web服务性能优化技术及其优劣,展望了未来Web服务性能优化的研究方向和面临的挑战。     

W3C user agent accessibility guidelines 1.0 for graphical Web browsers

Web browsers and multimedia players play a critical role in making Web content accessible to people with disabilities. Access to Web content requires that Web browsers provide users with final control over the styling of rendered content, the type of content rendered and the execution of automated behaviors. The features available in Web browsers determine the extent to which users can orient themselves and navigate the structure of Web resources. The World Wide Web Consortium (W3C) User Agent Guidelines are part of the W3C Web Accessibility Initiative, the guidelines provide a comprehensive resource to Web browser and multimedia developers on the features needed to render Web content more accessibly to people with disabilities. UAAG 1.0 was developed over a period of four years and included extensive reviews to demonstrate that the proposed requirements can be implemented.     

Understanding Web 2.0

Web 2.0, the second phase in the Web's evolution, is attracting the attention of IT professionals, businesses, and Web users. Web 2.0 is also called the wisdom Web, people-centric Web, participative Web, and read/write Web. Web 2.0 harnesses the Web in a more interactive and collaborative manner, emphasizing peers' social interaction and collective intelligence, and presents new opportunities for leveraging the Web and engaging its users more effectively. Within the last two to three years, Web 2.0, ignited by successful Web 2.0 based social applications such as MySpace, Flickr, and YouTube, has been forging new applications that were previously unimaginable.     

基于Internet的Web Services收集方法

Web Services作为一种部署在Internet上的新型的可复用软件资源,得到广泛的重视和应用。但是,现有通用搜索引擎并不能很好地支持Web Services的发现,这使得软件开发人员需要花费很大的代价寻找合适的Web Services。鉴于此,提出了一种基于Internet的Web Services获取方法,采用通用搜索引擎和特定Web Services信息发布网站相结合的方法,从Internet上收集Web Services,并从Web Services的相关网页中抽取相关描述信息。利用收集到的Web Services数据,对当前互联网上的WebServices现状进行了统计分析。这些统计结果一定程度上反映了WebServices的发展现状。     

An approach for supporting distributed user interface orchestration over the Web

Currently, a lot of the tasks engaged by users over the Web involve dealing with multiple Web sites. Moreover, whilst Web navigation was considered as a lonely activity in the past, a large proportion of users are nowadays engaged in collaborative activities over the Web. In this paper we argue that these two aspects of collaboration and tasks spanning over multiple Web sites call for a level of coordination that require Distributed User Interfaces (DUI). In this context, DUIs would play a major role by helping multiple users to coordinate their activities whilst working collaboratively to complete tasks at different Web sites. For that, we propose in this paper an approach to create distributed user interfaces featuring procedures that are aimed to orchestrate user tasks over multiple Web sites. Our approach supports flexible process modeling by allowing users to combine manual tasks and automated tasks from a repertoire of patterns of tasks performed over the Web. In our approach, whilst manual tasks can be regarded as simple instructions that tell users how to perform a task over a Web site, automated tasks correspond to tools built under the concept of Web augmentation (as it augments the repertoire of tasks users can perform over the Web) called Web augmenters. Both manual and automated tasks are usually supported by specific DOM elements available in different Web sites. Thus, by combining tasks and DOM elements distributed in diverse Web sites our approach supports the creation of procedures that allows seamless users interaction with diverse Web site. Moreover, such an approach is aimed at supporting the collaboration between users sharing procedures. The approach is duly illustrated by a case study describing a collaborative trip planning over the Web.