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領域QoS與資源感知的物流服務動態優化組合方法

Domain QoS and resource-aware logistics web service dynamic optimal composition

  • 摘要: 為了提高物流服務優化組合的動態性、可靠性與用戶滿意度,本文提出了一種基于全局服務質量(quality of service,QoS)約束分解的能夠感知領域質量與資源需求的物流服務優化組合方法.該研究工作首先把學習機制引入人工蜂群算法(artificial bee colony algorithm,ABC),形成了具有自主學習能力的改進型人工蜂群算法(LABC);之后,應用學習人工蜂群算法(LABC)將全局QoS約束分解成每個物流子任務需要滿足的局部QoS約束,從而將QoS感知的物流服務優化組合這一全局優化問題轉化成以領域質量為依據的局部最優服務選擇問題;其次,在物流服務流程執行的過程中,在感知物流任務節點對資源需求的前提下,為每一個物流任務節點選擇一個具有最優領域QoS的物流服務;與已有的研究工作相比,該方法能夠實現物流服務動態可靠的優化組合.最后,通過模擬實驗驗證了本文所提出的方法是可行有效的.

     

    Abstract: With the rapid development of service computing, cloud computing, internet of things, e-commerce, and modern logistics industry, cross-domain logistics services cooperation has become the main development trend of the modern logistics industry. The dynamic optimal composition of web services in logistics has become the key technology to create large and powerful logistics services based on the available logistics services of different companies that achieve seamless convergence of logistics services, satisfy user complex requirements, and realize the value addition. Recently, owing to the technologies of web services, cloud computing, and service sciences, an increasing number of logistics companies have registered themselves as logistics web service providers. The logistics services composition should satisfy the user's global QoS constraints and provide the best quality of service (QoS.) Currently, with the rapid development of cloud computing, e-commerce, service computing, and modern logistics industry, many logistics services are available on the network providing similar functions and different levels of QoS. These factors make the problem of determining the optimal composition of a logistics service a typical Np-hard problem. This study proposes a method to achieve the dynamic optimal composition of domain QoS and resource-aware logistics services and to realize logistics services that are dynamic, offer quality of domain services, and are aware of resource requirements. First, the learning artificial bee colony algorithm (LABC) is proposed; LABC is applied to decompose the global QoS constraints into local QoS constraints that logistics task nodes must satisfy and to transform the global optimization problem of logistics service composition into a local optimal service selection problem. Second, during the process of logistics service process execution, for each task node, the logistics service with best domain QoS evaluation, which can satisfy the local QoS constraints and resource requirements, is chosen to achieve a high-quality dynamic logistics service and optimal composition of service. The results of simulation experiments show that the proposed method is feasible and effective.

     

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