基于语义网的企业服务组合研究

<正>随着网络技术的快速发展,用户对互联网的服务需求也进一步提高,当单一的Web服务不能满足需求时,用户希望通过组合多个Web服务满足更复杂的业务需求。Web服务组合就是利用网络提供的开放的、标准的服务描述、发现和集成平台,并通过已有的服务进行组合,来实现客户的复杂业务。由于现有的协议和标准对Web服务的描述仅限于语法层次,不能表达语义信息,这就导致计算机只能记录我们的需求信息,     

动态服务组合的研究

目前Web服务已成为公认的实现服务的主流技术选择,其中动态Web服务组合技术是面向服务的计算的核心技术,本文介绍了动态服务组合的三个主要流派,并分析了它们的优缺点。     

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.     

第三方物流信息系统中基于agent的web服务组合研究

为解决第三方物流信息系统中web服务智能组合问题,对基于agent的web服务组合开展研究,提出基于agent的Web服务组合模型,设计服务组合的流程,分析基于agent的物流web服务组合关键问题。     

基于SOA的Web服务质量评价模型的研究

Web服务在执行基于面向服务架构（SOA）的企业级应用程序方面发挥了关键性作用。为了实现这一目标,一个实际的Web服务就要同时满足用户对Web服务的功能性和非功能性需求,但是,目前还没有一个关于Web服务质量的标准。为了获得关于Web服务的质量信息,本文提出了基于SOA的Web服务扩展框架,同时构建了一个适用于Web服务质量指标的WSBot原型。Web服务扩展框架可以用来确定满足用户的非功能性需求的Web服务。通过使用扩展Web服务框架,可以提高应用程序在调用无法控制的Web服务时最坏情况下的可预测性。     

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。     

面向服务的敏捷供应链协同与集成技术研究

语义网作为下一代Web能够实现计算机自动处理功能。通过在Web服务中引入面向供应链的领域语义本体,将语义网与Web服务结合的语义Web服务技术为Web服务加入语义描述,可完成Web服务之间的语义级交互,从而实现敏捷供应链的复杂业务流程协同与动态组合,实现跨企业的应用系统集成。建立基于面向服务的敏捷供应链协同与集成系统架构,其松散耦合、跨企业、跨平台、支持异构系统的互操作且具有系统快速重构等能力,成为实现敏捷供应链的敏捷性、虚拟性和可重构性等特征的有效解决方案。     

基于案例推理的供应链Web服务集成框架

供应链管理（SCM）的核心是处于供应链各个环节的组织机构之间的协同和一体化运作.随着对供应链应用系统的深入集成的需求越来越迫切,需要把跨部门或跨组织的Web服务集成起来协调运行以提供一体化服务.本文结合供应链条件下的Web服务集成问题,提出了一种基于案例推理（CBR）的供应链Web服务集成框架.     

基于QoS优化的面向服务流程分解方法

面向服务的业务流程分解是构建面向服务系统的前提。文章分析了复杂业务过程的QoS因素及其计算,提出一种基于QoS的服务流程分解方法。该方法首先应用OWL-S(Ontology Web Language for Services)进行流程建模,再对OWL-S模块进行归并、组合,将复杂业务流程转化成由几种典型结构构成的服务组合形式,通过服务组合和流程QoS约束的计算,实现流程分解的优化。最后通过一个汽车贷款审批的实例验证了分解方法的有效性。     

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.     

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.     

Research on manufacturing grid resource service optimal-selection and composition framework

In order to address the resource service optimal-selection (RSOS) and composition problem in manufacturing grid (MGrid) system and provide high-quality service to users, an MGrid RSOS and composition framework (MGrid-RSOSCF) is investigated in this study. The process of RSOS and composition is divided into the following five steps in MGrid-RSOSCF: (1) decomposing the submitted manufacturing task into several subtasks (i.e. single resource service requested task) if the submitted task is a multiple resource service requested task; (2) searching out the qualified resource service for each decomposed subtask and generating the corresponding candidate resource service set; (3) retrieving, evaluating and comparing the quality of service (QoS) for each candidate resource service, and provide data for service optimal-selection and composition –if the submitted task is a single resource service requested task; (4) evaluating synthetically the overall quality of each candidate resource service and ranking them, and selecting the optimal one for the task – if the submitted manufacturing task is an multiple resource service requested task; (5) selecting one candidate resource service from each candidate resource service set and constructing a new composite resource service according to the submitted task requirements, and collecting all the possible resource service composite execution paths (RSCEP) and selecting the optimal paths to execute the task. The proposed MGrid-RSOSCF consists of five layers and each layer provides the corresponding necessary services and algorithms to address one problem mentioned above. The five layers are: (1) T-layer, responsible for MGrid task decomposition; (2) S-layer, responsible for resource service match and search; (3) Q-layer, responsible for QoS processing; (4) O-layer, responsible for evaluating and ranking the candidate resource service and (5) C-layer is responsible for resource service composition and optimal-selection. The case study and comparison of performances of the algorithms demonstrate that the proposed methods are sound on success rate and executing efficiency.     

探索WEB2.0孵化器公共服务平台

孵化器突破传统公共服务平台建设模式,基于WEB2.0技术和理念搭建全体孵化器网络成员参与建设,促进社会机构用户与企业用户之间服务对接,企业用户之间上下游资源对接的WEB2.0孵化器公共服务台。该平台真正将孵化器网络具体化,为新生企业营造开放、共享、全面的创业生态系统。     

Relevant and Preferred Public Service: A study of user experiences and value creation in public transit

When public service success is dependent upon creating value that attracts users, public managers can benefit from adopting private sector principles. This article draws on the theory of attractive quality and strategic management research to focus on the theoretical and managerial implications of how organizations’ resource allocations affect user experiences. The present study shows how public transit organizations’ achievement of twenty-five different service requirements affected their offerings’ relevance and preference among 930 users. This article increases the understanding of how strategic choices and prioritization between various service requirements affect both the effectiveness and efficiency of (public) service offerings.     

数字图书馆中自适应个性化服务研究

个性化服务是数字图书馆中最重要的功能之一,数字图书馆中的自适应个性化服务很好地解决了日益严重的"信息过载"问题,本文首先针对数字图书馆中用户的特性,分析了数字图书馆中自适应个性化服务需求,其次,设计了基于情景感知的自适应个性化服务框架,可以根据用户所处的情境,快速准确地为用户推送所需要的资源,最后,讨论了自适应个性化服务实现过程中应该解决的几个关键问题。     

基于模糊综合评价法的高校图书馆服务质量评价研究——以云南省某高校图书馆为例

图书馆服务质量是指图书馆在为用户提供服务过程中,满足用户需求的程度,用户应该是图书馆服务质量的评价者。借鉴LibQUAL+TM系统设计出云南某图书馆调查问卷。专家采用1-9标度法确定指标权重,通过模糊综合评价法对调研数据进行运算,获得该馆的服务质量评价结果,进而得出提高其服务质量的对策。     

Modelling of combinable relationship-based composition service network and the theoretical proof of its scale-free characteristics

Existing works on service composition are primarily based on the requirements of service composition, such as describing language supporting service composition, service composition framework, mechanism and method for service composition, and service composition validation. Few works have been carried out from the perspective of combinable relationship among composite services and composition service network. This article emphasises on combinable relationship-based composition service network, i.e. CoRCS-Net. The principles for establishing and modelling CoRCS-Net were studied, and nine combinable relationships among services in CoRCS-Net were investigated and 14 elementary evolving operators for CoRCS-Net dynamic evolution were designed. According to the definition of scale-free network (SFN) and the investigations on its related research achievements, it is supposed that ‘CoRCS-Net is a scale-free network’ in this study. In order to prove the theoretical hypothesis, the concepts of combinable strength and variation of combinable strength were introduced, and combinable strength is used to describe the invoking times of a service being invoked for service composition. First we calculate the real time variation of combinable strength of an arbitrary service in CoRCS-Net, and then obtain the corresponding real time combinable strength and investigate its distribution for all services in CoRCS-Net. It is discovered that ‘like many nature and social phenomenon, CoRCS-Net is “scale-free”, and it is constructed by few “active services” and a great deal of “silent services”. In the process of service composition, the invoking times for majority services are very small, while only few services are invoked frequently, and the probability (or invoking times) for the services in a CoRCS-Net to be invoked for service composition decays as a power-law’.     

Multi-stakeholders’ assessment of bike sharing service quality based on DEMATEL–VIKOR method

ABSTRACT

Bike sharing is a sustainable mode of urban transportation. Assessing the perceived service quality is essential to improve the development of bike sharing. Most of the existing research evaluates the service quality of bike sharing only from the perspective of its users. This study assesses the perceived quality gap among four different stakeholders including government regulators, platform operators, bike association and users. First, an evaluation criteria system consisting of sixteen criteria obtained from the five dimensions of tangibles, reliability, responsiveness, assurance and empathy is constructed based on a revised service performance model. Thereafter, a hybrid multi-criteria decision-making model that combines Decision-Making Trial and Evaluation Laboratory (DEMATEL) with VIsekriterijumska Optimizacija I Kompromisno Resenje (VIKOR) is proposed. Then, the model is applied to evaluate the service quality of bike sharing in Xi’an City. Finally, some useful suggestions are given to improve the bike sharing service quality from the perspective of multi-stakeholders.     

企业级应用架构研究:SOA架构融合SaaS模式

SOA是面向服务的架构,其理念指导把应用程序的不同单元以服务的形式提供支持,平台及底层实现均对用户透明,用户只需要以中立的接口和契约进行通信,获取相应的服务即可;而SaaS则是一种软件服务提供的模式,基于互联网为终端用户提供软件服务的软件应用模式;本文研究讨论二者所承担的角色,及其分别在不同层面如何发挥作用。在认清二者关系后,研究在目前市场发展趋势下如何融合衍生。     

对高校图书馆在线信息咨询服务的思考

在线信息咨询服务是基于互联网为用户提供咨询、帮助用户获取信息的咨询服务,它具有针对性、主动性、引导性、灵活性等显著特征。鉴于现状分析,介绍了在线信息咨询服务的方式,提出了加强高校图书馆在线信息咨询服务的策略。