面向电子商务Web服务的SOAP消息安全传输机制

本文针对电子商务系统Web服务安全性需求,提出了一种端到端的SOAP消息安全传输机制。首先介绍了SOAP协议结构和XML安全规范,在此基础上提出了SOAP安全模型以及相应的SOAP消息安全传输保障机制,最后分析了传输机制的安全性。实例分析结果表明,提出的SOAP安全传输机制能够确保电子商务系统Web服务的信息传输安全需求。     

基于Web服务的虚拟企业信息系统集成模型

本文从虚拟企业的特点出发,在分析Web Service原理和特点的基础上提出了一种基于Web服务的虚拟企业信息系统集成模型。该模型不但使虚拟企业信息系统具有良好的动态可重构性、集成性和开放性,虚拟企业成员能够在不同的计算环境中进行协作,而且使虚拟企业信息系统具有良好的可靠性和安全性。     

多数据源数据信息交换中间件的设计与实现

网络环境下的异构数据交换技术是数据集成、电子商务应用和Web服务合成系统等实际应用的核心支撑技术。文章基于"协作者"模式,以关系数据库和XML文档为异构数据源的典型代表,给出了Web服务环境下的数据交换模型,介绍了数据交换模型的4种基本操作的算法思想和利用Web服务合成技术实现数据交换的方法,通过一个示例,验证了文章提出的数据交换方法的有效性。     

基于服务池的语义Web服务发现

传统的Web服务发现和订阅是费时费力的;而且缺乏语义描述,无法实现Web服务之间互操作的智能化,搜索的精确度不高.本文提出了一种基于服务池的语义Web服务的发现和订阅模型.首先进行功能性的匹配,将结果聚合威服务池,服务池再进行QoS匹配.该模型具有以下特点:①将服务池作为消费者发现和订阅的唯一视图,以"服务消费者中心"的方式简化了服务发现和调用的过程.②在原有基于服务聚合方法基础上,增强了Web服务的语义信息,提高了服务匹配的准确率.     

基于Web数据挖掘的电子商务网站个性化服务的研究

本文在阐述Web数据挖掘技术的定义和过程基础上,把Web数据挖掘应用到电子商务网站个性化推荐服务系统中,形成了基于Web数据挖掘的个性化服务电子商务网站模型,并对数据挖掘技术在个性化服务不同层面的应用进行分析。     

基于SharePoint平台的企业项目文档管理应用研究

从企业项目文档管理的实际需求出发,借用微软SharePoint平台,设计实现了一个基于Web服务的文档管理系统。在系统中采用了基于WindowsSharePointServer平台的文档管理关键技术,基于工作流的动态文档管理,使用了一种基于Web服务的文档工作流处理结构,处理文档的审批流转。设计使用多文档库,并集成外部Web部件对文档库视图权限限制,增加文档安全性。     

基于Web的安全访问控制技术

在Web服务环境中,联机合同如学校许可表格、预订系统或者股票等都可能变成联机事务,他们都需要通过验证来确保其安全性。为了获得最大的信任,有效避免欺诈行为,本文对Web的安全策略和访问控制技术进行了探讨。     

Web服务技术的企业应用集成模型设计

信息技术的不断发展,使基于Web服务技术的企业应用集成将成为下一代企业应用集成的主流技术之一,也成为现阶段企业改革与发展的方向。本文阐述了利用网络技术将企业由企业内部扩展其他能普及到的地域,分析了企业应用集成和Web服务的技术特点,主要对基于Web服务技术的企业网络应用集成的模型设计、主要技术和一些应用进行了一些探讨。     

基于Web服务组合的企业业务流程集成研究

首先提出了基于Web服务组合的业务流程集成思想,进而介绍了基于与/或树的服务组合模型,包括输入/输出依赖与/或树及其搜索算法.并以铁路货物运输费用的计算流程为例,介绍了基于Web服务组合的业务流程集成实施步骤.     

基于直接信任关系表的Web服务资源访问机制

文章针对网格环境Web服务资源访问过程中,用户查找Web服务资源的快速性与有效性问题,以D-S证据理论为基础,提出了一种基于直接信任关系表的网络Web服务资源组织演化模型,每个节点只存储直接交互节点的信任关系,并基于此模型提出了一种基于信任BP神经网络判别隶属函数的Web服务资源信任查找机制。通过将中间节点判别隶属函数最高的节点作为资源的查找出发点,而中间节点又从自己的信任链路中查找信任度最高的节点,从而在加速服务查找速度的同时,达到提高查找服务成功率的目的。最后,经过大量模拟仿真实验结果表明:该算法较传统的基于穷尽搜索机制而言,不仅提高了查找的速度,而且显著地提高了查找的成功率。     

A method towards Web service combination for cross-organisational business process using QoS and cluster

How to quickly combine various Web services to support cross-organisational business processes is the key technical problem in service computing. Because of the changeability of QoS of Web services, the traditional methods are unadaptable to the new environments. In this paper, a new service composition method, called Improved Self-organising neural network Method for Web Service Composition, is proposed to achieve QoS-aware Web service combination, according to using the clustering technology. First, fuzzy mathematics is used to express each QoS attribute and the improved self-organising neural network is used to cluster services to reduce the number of candidate services. Secondly, all the centre of each cluster is selected and formed a composite service by using an exhaustive algorithm. Thirdly, the service cluster that is represented by the concrete services. Finally, the optimal service combination can be selected using integer programming or genetic algorithm. The experimental result shows the efficiency of Web service composition and demonstrates the applicability.     

Web service discovery among large service pools utilising semantic similarity and clustering

With the rapid development of electronic business, Web services have attracted much attention in recent years. Enterprises can combine individual Web services to provide new value-added services. An emerging challenge is the timely discovery of close matches to service requests among large service pools. In this study, we first define a new semantic similarity measure combining functional similarity and process similarity. We then present a service discovery mechanism that utilises the new semantic similarity measure for service matching. All the published Web services are pre-grouped into functional clusters prior to the matching process. For a user’s service request, the discovery mechanism first identifies matching services clusters and then identifies the best matching Web services within these matching clusters. Experimental results show that the proposed semantic discovery mechanism performs better than a conventional lexical similarity-based mechanism.     

Web Services安全技术研究

Web Service的安全性在当前的应用中起到基础作用。在分析了Web Service安全现状的基础上,根据Web Service的主要安全需求,提出了安全的SOAP消息方法,主要采用文档对象的加密方法并且定义了数据加密的过程,给出了基于元素方式的数据加密的一个安全机制,可有效的保证SOAP消息的安全传输。     

Reusing process fragments for fast service composition: a clustering-based approach

With the proliferation of Web services over the Internet and due to the increasing complexity of users’ needs, Web service composition has emerged as a powerful method of software reuse, allowing to deliver complete business processes as a set of interacting services. To guarantee a rapid and secure service composition, fragments of available business processes at different granularities may be considered as a composition unit and recombined to deliver effective compositions. Despite the benefits of this method, most of the existing works do not take into consideration the reuse of service process fragments (SPF). Reusing SPFs allows, not only to minimize the composition time, but also to improve the reliability of the composition process. In this paper, we propose a Web service composition approach that aims to combine service process fragments rather that atomic services. We adopt a powerful mathematical model called Formal Concept Analysis (FCA) to define the relationships between services and fragments. Moreover, we exploit the regrouping capabilities of FCA by proposing algorithms for the extraction of candidate fragments’ combinations. A scoring function is also defined to determine the quality level of each SPF and its ability to participate in a composition. The experimental studies proved the effectiveness of our FCA-based approach compared to existing state-of-the-art solutions.     

基于ASP的网站开发安全问题及漏洞防范研究

许多用户共享的数据都集中在数据库系统中,因而其安全性也是个十分重要的问题。一旦数据库遭到破坏,整个系统都将面临崩溃。从SQL Server2000数据库管理自身提供的安全机制出发,对在设计与开发Web网站中所遇到的操作数据库的安全性问题进行探讨,并对SQL注入漏洞给出具体的防范措施,这些方法和措施可用于网站设计中对SQL Serve数据库进行安全访问控制。     

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.     

The role of technology-based services in establishing brand equity within the private hospitals sector in Kuwait

This study aims to explore the role of technology-based services in establishing brand equity within the private hospitals sector in Kuwait. A survey is designed based on dimensions that include ease of use, e-responsiveness, e-scape, security, and customization. E-responsiveness and security had strong and direct influence on brand equity; whereas, ease of use, e-escape, and customization had no significant positive impact on the brand equity. The proposed model of relationship between e-service quality and brand equity has the potential to help hospital managers to establish their brand equity through managing the level of their online services.     

基于WebGL技术的轨道交通综合安防系统三维可视化应用研究

随着GIS向Web化,二维向三维化发展,三维WebGL已经逐渐成为GIS学科和BIM学科发展的热点,涉及科技发展的多个领域,极具技术研究和应用价值。基于WebGL技术的轨道交通综合安防系统三维可视化应用研究涉及WebGL技术、Three.js技术、CSS+HTML+JS技术、Jquery技术、JSON技术等。论文基于WebGL的三维场景可视化关键技术,主要是通过3DMax软件将模型转换成obj格式,再通过Three.js框架的OBJLoader加载器加载obj模型,最后在Web端进行三维可视化渲染。     

The adoption of Firm-Hosted Online Communities: an empirical investigation into the role of service quality and social interactions

Online communities are a powerful device for collaborative creativity and innovation. Developments in Web 2.0 technologies have given rise to such interactions through firm-hosted online communities (FHOCs) – firm-run online information services that also provide self-help to a community. We devise a model that seeks to explain the factors that encourage people to become members of a FHOC and test the model using structural equation modelling based on data collected from 511 users of a FHOC. The study finds that: (a) an understanding of Perceived Usefulness (PU) plays a mediating role between Behavioural Intention (BI) to adopt FHOC and Trust, as well as Interface design; b) Networking among users has an indirect effect on BI; and c) design of the Interface has a direct influence on BI. A managerial implication is that Networking plays a role in the way supplementary services, including blogs and discussion forums, are perceived. Theoretically, when service quality is decomposed into components such as core services and supplementary services, it also positively influences PU.