發(fā)布時間：2018-05-12 20:36

  本文選題：Web服務 + QoS模型�。� 參考：《中南大學》2014年碩士論文

【摘要】：摘要：隨著面向服務體系結構(Service Oriented Architecture,SOA)被廣泛應用到電子、金融等多個領域,Web服務在生活中扮演越來越重要的角色。怎樣對網(wǎng)絡上存在的海量Web服務的性能進行評估、為用戶進行服務選擇提供參考是當前學術研究的熱點。目前研究人員尚未構建統(tǒng)一的服務質量評估體系,面向領域和面向語義的服務質量評估模型都存在一定的缺陷。且當前評估方法較多采用靜態(tài)數(shù)據(jù)對Web服務QoS進行評估,較少考慮服務質量屬性的動態(tài)變化及趨勢的影響,對服務質量屬性的權重賦值通常具有主觀性,缺乏客觀性與理論依據(jù)。 本文以此為出發(fā)點,在以下幾個方面展開研究： (1)結合股票市場分析中的CYE和RSI指標原理,在服務質量評估體系中首次引入服務質量相對屬性指標,建立了引入相對指標的Web服務QoS評估新體系。利用該相對指標,將被評估服務的歷史表現(xiàn)與實時情況綜合考慮,對實時數(shù)據(jù)進行預處理后參與服務質量評估,從而使得評估數(shù)據(jù)更加真實地反映服務的整體性能。 (2)對服務質量屬性相對指標進行實時計算時,需要查詢該服務相關的n條數(shù)據(jù),n根據(jù)實際情況選定。本文采用數(shù)學歸納法與公式代換的手段,推導出歷史記錄查詢化簡公式,嚴謹精確地實現(xiàn)歷史數(shù)據(jù)的查詢化簡。該查詢化簡公式極大地簡化了查詢量,提高了查詢效率。 (3)受經(jīng)濟學投入產(chǎn)出效率評估模型啟發(fā),本文將DEA模型與Web服務質量評估方法相結合,建立了一種新的服務質量評估方法。由于不同用戶對服務質量特定屬性的重視程度不同,本文對DEA模型進一步完善,建立了帶偏好的Web服務質量綜合評價DEA模型。 實驗結果證明引入服務質量相對指標體系的Web服務評估更加可信、全面、穩(wěn)定。帶偏好的Web服務質量綜合評價DEA模型在不同用戶偏好下具有很好的適用性。
[Abstract]:Abstract: as Service Oriented Architecture (SOA) is widely used in many fields such as electronics and finance, Web services are playing an increasingly important role in life. How to evaluate the performance of mass Web services on the network and provide reference for users to choose services is a current academic research At present, researchers have not yet built a unified quality of service evaluation system, and there are some defects in the domain oriented and semantic oriented quality evaluation models. And the current evaluation methods use static data to evaluate the Web service QoS, less consideration of the dynamic changes and trends of the quality of service, and the service of service. The weight assignment of quality attributes is usually subjective, lacking objectivity and theoretical basis.
Based on this point of view, the following studies are carried out:
(1) combining the CYE and RSI index principle of stock market analysis, the relative attribute index of service quality is introduced in the service quality evaluation system for the first time, and a new system of Web service QoS evaluation is set up with relative index. The relative index is used to consider the historical performance and real-time situation of the assessed service, and the real-time data is pretreated. Then participate in the service quality evaluation, thus making the evaluation data more truly reflect the overall performance of the service.
(2) when the relative index of the quality of service quality is calculated in real time, the N data related to the service should be querying, and N is selected according to the actual situation. In this paper, the formula of historical records query simplification is derived by means of mathematical induction and formula substitution, and the query reduction of the history data is strictly and accurately realized. The query simplification formula is greatly simplified. The query amount is changed, and the efficiency of the query is improved.
(3) inspired by the economic input-output efficiency evaluation model, this paper combines the DEA model with the Web quality evaluation method, and establishes a new method for evaluating the quality of service. Because different users pay different attention to the specific quality of service quality, this paper perfects the DEA model step by step and establishes the Web service quality synthesis with preference. Evaluate the DEA model.
The experimental results show that the Web service evaluation introduced into the QoS relative index system is more reliable, comprehensive and stable. The DEA model with preferred Web quality evaluation has good applicability under different user preferences.

【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.09

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本文編號：1880069