本文選題：語義Web服務 + 領域本體��； 參考：《重慶大學》2014年博士論文

【摘要】：Web服務集成是構建基于面向服務體系架構（Service Oriented Architecture，SOA）的企業(yè)信息框架的關鍵技術，其基本思想是把服務作為基礎構件，支持快速、低成本的分布式甚至異構環(huán)境的應用組合開發(fā)，解決不同系統(tǒng)/平臺間的應用整合問題。服務集成的目標是實現(xiàn)企業(yè)現(xiàn)有內部軟件資源和外部服務的重用，并在此基礎上組合成具有一定功能的軟件系統(tǒng)，以提高軟件構造的效率，滿足不斷變化的用戶需求。 從技術角度分析，服務集成是一個服務發(fā)現(xiàn)、選擇和組合執(zhí)行的業(yè)務流程�，F(xiàn)行的Web服務技術在服務發(fā)現(xiàn)效能、動態(tài)服務選擇與組合方面，缺乏有力的支撐。語義Web服務為上述問題提供了新的解決途徑，利用其良好的語義描述能力和邏輯推理能力，能自動、準確、高效地進行服務集成，動態(tài)生成和執(zhí)行業(yè)務流程。目前，在語義Web服務的發(fā)現(xiàn)、選擇和組合領域已取得一定研究成果，但尚未提出一個完整的基于語義的Web服務集成方案。 本文從基于語義的服務描述模型、服務匹配與發(fā)現(xiàn)、服務選擇與組合、數(shù)據(jù)服務、服務集成框架等方面進行研究，構建了勘察設計企業(yè)協(xié)同設計平臺原型。論文主要研究工作如下: ①針對現(xiàn)有Web服務描述語言WSDL(Web Service Description Language)不能提供語義信息的局限性，建立了基于語義的Web服務描述模型。該模型將描述Web服務語義的主流規(guī)范OWL-S(Web Ontology Language for Services)和現(xiàn)有的WSDL、UDDI等成熟技術充分結合，用WSDL描述服務名稱、服務描述，URI地址信息等具體信息，用OWL-S描述服務功能等抽象信息，同時支持基于語法和語義的匹配與發(fā)現(xiàn)；并在功能語義的基礎上增加服務的QoS(Quality of Service)本體描述，為服務選擇和組合提供支持。 ②針對基于UDDI(Universal Description, Discovery and Integration)的傳統(tǒng)Web服務發(fā)現(xiàn)機制只能提供關鍵字查找，不能進行語義匹配的問題，提出了一種基于語義的Web服務分層匹配模型。模型分為服務類型匹配、服務描述特征聚類和服務功能匹配三個層次，各層采用相應的算法，逐步縮減匹配問題的規(guī)模，改進了服務匹配的效率和精準度。在此基礎上，對UDDI進行語義擴展，構建支持語義的服務發(fā)現(xiàn)框架，并針對實際SOA系統(tǒng)中服務訪問規(guī)模大、頻率高的特點，，設計了一種服務發(fā)現(xiàn)優(yōu)化方案。 ③為適應勘查設計領域復雜多變的運行環(huán)境和任務需求，提高服務選擇與組合的效率，研究了基于任務分解的語義Web服務選擇與組合機制。提出了一種基于迭代學習的任務分解算法，優(yōu)化服務的選擇與組合過程；并針對服務組合過程中運行環(huán)境的異構性和資源負載的動態(tài)變化，設計了一種面向任務的自適應服務組合機制。 ④從數(shù)據(jù)集成和應用集成兩方面進一步分析Web服務集成中的關鍵問題，提出了一種基于語義的Web服務集成框架，并應用于勘察設計企業(yè)協(xié)同設計平臺；針對傳統(tǒng)異構數(shù)據(jù)訪問方式存在的問題，采用數(shù)據(jù)服務的方式，對底層數(shù)據(jù)源直接進行封裝，提供更加靈活的數(shù)據(jù)處理功能，并向上層提供易于集成的標準Web服務。
[Abstract]:Web service integration is the key technology for building enterprise information framework based on Service Oriented Architecture (SOA). Its basic idea is to use service as a basic component, support fast, low cost distributed and heterogeneous environment application combination, and solve the problem of application integration between different systems / platforms. The goal of service integration is to realize the reuse of the existing internal software resources and external services of the enterprise, and on this basis, it can be combined into a software system with certain functions to improve the efficiency of the software construction and meet the changing needs of the users.
From a technical point of view, service integration is a business process of service discovery, selection and combined execution. The current Web service technology lacks strong support in service discovery efficiency, dynamic service selection and combination. Semantic Web services provide a new solution to the above problems, using its good semantic description ability and logic. Reasoning ability can automatically, accurately and efficiently perform service integration, dynamically generate and execute business processes. At present, some research results have been achieved in the discovery, selection and combination of semantic Web services, but a complete semantic based Web service integration case has not been proposed.
From the semantic based service description model, service matching and discovery, service selection and combination, data service, service integration framework and other aspects, the prototype of collaborative design platform for survey and design enterprise is constructed. The main research work of this paper is as follows:
(1) in view of the limitations of the existing Web service description language WSDL (Web Service Description Language) that can not provide semantic information, a semantic based Web service description model is established. SDL describes specific information such as service name, service description, and URI address information, describes abstract information such as service functions in OWL-S, and supports the matching and discovery based on syntax and semantics, and adds QoS (Quality of Service) ontology description of services on the basis of functional semantics to provide support for service selection and combination.
(2) the traditional Web service discovery mechanism based on UDDI (Universal Description, Discovery and Integration) can only provide keyword search and can not match the semantics. A semantic based hierarchical matching model for Web services is proposed. The model is divided into service type matching, service description feature clustering and service function matching three. At the level, each layer adopts the corresponding algorithm to gradually reduce the size of the matching problem and improve the efficiency and precision of the service matching. On this basis, the semantic extension of UDDI is extended to build the service discovery framework supporting the semantics, and a service discovery optimization is designed for the large scale and high frequency of the service access in the actual SOA system. Plan.
(3) in order to adapt to the complex and changeable operating environment and task requirements in the field of exploration and design, and to improve the efficiency of service selection and combination, the semantic Web service selection and combination mechanism based on task decomposition is studied. A task decomposition algorithm based on iterative learning is proposed to optimize the selection and combination process of service, and the service combination process is aimed at the service combination process. In this paper, we design a task oriented adaptive service composition mechanism based on the heterogeneity of the running environment and the dynamic change of resource load.
(4) from two aspects of data integration and application integration, the key problems in Web service integration are further analyzed. A semantic based Web service integration framework is proposed and applied to the collaborative design platform of survey and design enterprises. In view of the problems existing in the traditional heterogeneous data access methods, the data service is used and the underlying data sources are directly used. It provides encapsulation, provides more flexible data processing functions, and provides standard Web services that are easy to integrate to the upper level.
【學位授予單位】：重慶大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TP393.09

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