本文選題：Web服務(wù)　切入點(diǎn)：Web服務(wù)組合　出處：《西南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來(lái),隨著電子商務(wù)的迅猛發(fā)展,形形色色的Web服務(wù)大量的涌現(xiàn),服務(wù)提供商也不斷將現(xiàn)存的Web服務(wù)整合起來(lái)形成新的、增值的服務(wù),去不斷的滿足用戶的需求。不過(guò),用戶在各種需求能夠得到滿足的同時(shí),也對(duì)如何才能從這些海量的功能性相同的Web服務(wù)集中挑選出符合自身需求的服務(wù)感到力不從心。因此,如何有效地挑選出符合用戶偏好的Web組合服務(wù),尤其是符合用戶特定需求的Web組合服務(wù),漸漸成為學(xué)術(shù)界研究的熱點(diǎn)。而在目前的一些基于QoS的Web服務(wù)組合方法研究中,一般采用一些預(yù)定的局部約束對(duì)各個(gè)服務(wù)候選集中的原子服務(wù)進(jìn)行篩選,并不注重用戶的偏好,對(duì)各個(gè)子任務(wù)的QoS指標(biāo)以及各個(gè)子任務(wù)的權(quán)重同等處理。這些都是有悖于用戶日常生活習(xí)慣的。有鑒于此,本文從用戶的角度出發(fā),對(duì)基于用戶偏好的Web服務(wù)組合方法做了以下研究工作： (1)基于用戶偏好的Web服務(wù)組合框架的建立。本文在綜合考慮現(xiàn)有的服務(wù)組合框架后,提出一個(gè)基于用戶偏好的服務(wù)祝賀框架,增加用戶偏好確定模塊和服務(wù)組合規(guī)劃制定模塊,并注重框架與用戶的互動(dòng)性,更好的去反映用戶的偏好。該框架能夠?qū)⒏鱾�(gè)服務(wù)組合流程模式化,規(guī)范整個(gè)Web服務(wù)的組合流程,更好的滿足用戶的偏好。 (2)服務(wù)組合中全局約束的分解。本文采用FAHP的方法量化用戶在各個(gè)子任務(wù)以及QoS指標(biāo)上的偏好,設(shè)定每個(gè)子任務(wù)的權(quán)重,并根據(jù)用戶的偏好分解全局約束,將得到的這些局部約束信息和各個(gè)子任務(wù)權(quán)重信息發(fā)送到服務(wù)選擇模塊。 (3)滿足局部約束的N次篩選流程。服務(wù)選擇模塊中對(duì)由大量的功能性相同非功能性不同的Web服務(wù)組成的候選服務(wù)集,我們采用cskyline算法篩選候選服務(wù)集,縮小候選服務(wù)集的規(guī)模,并采用N-FAHP方法確定用戶在各個(gè)子任務(wù)的QoS指標(biāo)的權(quán)重。在此基礎(chǔ)上,我們按照各個(gè)子任務(wù)權(quán)重的大小,采用N次篩選的方法篩選組合服務(wù),盡可能高的去提高用戶對(duì)Web服務(wù)組合規(guī)劃的滿意度。 (4)基于用戶偏好服務(wù)組合方法的實(shí)例分析。由于本文主要側(cè)重于用戶偏好的服務(wù)選擇,與用戶的主觀性緊密相關(guān),不同的用戶由于他們的偏好不同,運(yùn)行得到的服務(wù)結(jié)果很可能不同,而且用戶對(duì)服務(wù)組合的滿意度也會(huì)因人而異,無(wú)法通過(guò)實(shí)驗(yàn)?zāi)M方法的有效性。因此本文借用一個(gè)用戶出行的實(shí)例來(lái)驗(yàn)證本方法的可行性和可操作性。
[Abstract]:In recent years, with the rapid development of electronic commerce, a large number of Web services have emerged, and service providers have constantly integrated existing Web services to form new, value-added services to meet the needs of users. Users can not only satisfy their needs, but also find it difficult to pick out services that meet their needs from these massive sets of Web services with the same functionality. How to effectively select the Web composition services that meet the user's preferences, especially the Web composition services that meet the specific needs of the users, has gradually become a hot topic in academic circles. However, in the current research of Web service composition methods based on QoS, In general, some predetermined local constraints are used to filter atomic services in each service candidate set, without paying attention to the preferences of users. The QoS index of each sub-task and the weight of each sub-task are treated equally. These are all contrary to the user's daily life habits. In view of this, this paper starts from the user's point of view, The following research work has been done on the Web service composition method based on user preference:. 1) the establishment of Web service composition framework based on user preference. After considering the existing service composition framework, this paper proposes a service congratulations framework based on user preference, which includes user preference determination module and service composition planning module. The framework can model each service composition process, standardize the whole Web service composition process, and better meet the user's preference. (2) decomposition of global constraints in service composition. This paper uses FAHP method to quantify users' preferences on each subtask and QoS index, sets the weight of each subtask, and decomposes the global constraint according to the user's preference. These local constraint information and each sub-task weight information are sent to the service selection module. In the service selection module, we use the cskyline algorithm to filter the candidate service set, which is composed of a large number of Web services with the same functionality and non-functional, so as to reduce the size of the candidate service set. The N-FAHP method is used to determine the weight of the user's QoS index in each sub-task. On this basis, according to the weight of each sub-task, we use the method of N times to filter the composite service. As high as possible to improve the user's Web services composition planning satisfaction. 4) A case study based on the method of user preference service composition. Because this paper mainly focuses on the service selection of user preference, it is closely related to the subjectivity of users, and different users have different preferences because of their different preferences. The result of running the service is likely to be different, and the satisfaction of the user with the service composition will vary from person to person. The effectiveness of the experimental simulation method can not be achieved, so this paper uses an example of user travel to verify the feasibility and maneuverability of this method.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.09

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