基于OWL-S的语义Web服务组合的研究

发布时间：2018-04-05 17:40

本文选题：Web服务　切入点：OWL-S　出处：《太原理工大学》2014年硕士论文

【摘要】：语义Web服务是在传统Web服务的基础上对服务进行了语义封装,为服务组合的研究开辟了新方向,使语义Web服务组合成为服务组合研究的热点。本文主要研究语义Web服务组合中的服务组合技术,该技术既要能满足用户对于服务组合的功能需求,又要满足用户的非功能需求。目前语义Web服务组合的研究方法给出的组合路径,没有考虑到用户的实际需要,用户只能被动接受单一的组合结果。本文在现有Web服务组合相关研究的基础上,深入分析了当前服务组合存在问题,将图规划的智能规划方法引入服务组合中,结合服务中的语义信息,从而得到满足用户需求的多个服务组合路径,在此基础上加入了基于用户QoS约束的组合路径优化选择方法,对多条组合路径进行选择,最后通过对图书订购过程中用到的语义Web服务进行组合,用实例说明了本文提出的服务组合方法的可行性。本文的主要研究内容和成果有： 1)基于本体的语义Web服务匹配。本体作为服务组合各方共享的知识库,对Web服务的输入,输出等进行语义标注,通过查询本体中概念间的逻辑关系,获取语义Web服务所表示功能之间的语义联系,作为组合服务中各服务之间的内在联系。 2)本文将服务组合技术分为组合路径规划和组合路径优化选择两部分,他们共同构成了本文服务组合框架的组合管理模块。 3)本文将图规划技术引入到服务组合中来,实现了语义Web服务组合。考虑到本文中服务组合的应用,引入了基于图规划技术的服务组合路径生成的方法。该方法首先根据用用户需求建模,构建出规划图,其次利用图规划中规划图的逆向搜索算法,得到满足用户请求的组合路径树。 4)最后,实现了组合路径的优化选择。为了选择与用户需求最接近的服务组合路径,本文在对QoS个属性不同特性理解的基础上,使用了有区别的属性值聚合计算方法,并利用多属性决策方法,实现多条组合路径的优化选择。
[Abstract]:Semantic Web services is a semantic encapsulation of services based on traditional Web services, which opens a new direction for the research of service composition and makes semantic Web service composition a hot topic in service composition research.This paper focuses on the service composition technology in semantic Web service composition, which can not only meet the functional needs of users for service composition, but also meet the non-functional needs of users.The composition path given by the present research method of semantic Web service composition does not take into account the actual needs of the user, so the user can only passively accept a single composition result.Based on the existing research on Web service composition, this paper deeply analyzes the existing problems of service composition, introduces the intelligent planning method of graph planning into service composition, and combines the semantic information of service.In order to meet the needs of users, multiple service composition paths are obtained. On the basis of this, a composite path optimization method based on user QoS constraints is added to select multiple composite paths.Finally, by combining the semantic Web services used in the process of book ordering, the feasibility of the service composition method proposed in this paper is illustrated by an example.The main contents and achievements of this paper are as follows:1) Ontology-based semantic Web service matching.Ontology, as a knowledge base shared by all parties of service composition, annotates the input and output of Web services. By querying the logical relations between concepts in ontology, the semantic relation between the functions represented by semantic Web services is obtained.As an internal link between services in a composite service.2) this paper divides the service composition technology into two parts: composition path planning and composition path optimization. Together, they constitute the composition management module of this service composition framework.3) this paper introduces graph planning technology into service composition and implements semantic Web service composition.Considering the application of service composition in this paper, a method of service composition path generation based on graph planning is introduced.Firstly, the planning graph is constructed according to the user's requirement, and then the combinational path tree satisfying the user's request is obtained by using the reverse search algorithm of the plan graph in the graph planning.Finally, the optimal selection of combinatorial paths is realized.In order to select the service composition path closest to the user's requirements, this paper uses a distinct attribute aggregation method based on the understanding of the different properties of QoS attributes, and makes use of the multi-attribute decision method.The optimal selection of multiple combined paths is realized.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.09

【共引文献】