面向多用户的服务选择方法研究

发布时间：2018-03-14 01:30

本文选题：服务选择　切入点：多用户需求　出处：《南京邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：伴随着服务发布与部署的日益便捷,多个用户同时请求功能属性相同的服务现象越来越普遍。在面向多用户请求的服务选择中,常常会出现同一服务资源被多个用户同时使用,而其他资源被闲置的现象。候选服务数量的增加导致服务选择效率较低。与此同时,由于缺乏专业的知识,大多数用户无法精确地表达用户的需求。本文针对以上的问题展开深入研究,主要工作如下:1)从用户角度出发提出基于区间数距离的服务选择方法:首先,使用区间数帮助用户更好地表达用户需求。其次,采用层次聚类方法为用户需求进行分组从而减小用户需求的数量。在此基础上根据用户需求与服务之间的匹配度为每个用户选择一个合适的服务。最后,通过实例对比和仿真实验验证了本文所提方法的可行性和有效性。2)从服务角度出发提出了一种基于离散系数的双向服务选择方法:该方法首先引入服务稳定性概念,通过计算与更新QoS的离散系数动态地剔除掉稳定性较低的候选服务。然后提出了一种双向服务选择方法,更好地满足用户需求,避免服务过载。最后,通过仿真实验验证了所提方法的可行性与有效性。3)基于以上的理论研究成果,设计并开发了服务推荐原型系统和餐饮服务选择应用示范。服务推荐原型系统的设计遵循需求分析、概要设计、详细设计、功能实现等流程。餐饮服务选择应用示范完成需求聚类、服务过滤、服务选择等功能模块。原型系统和应用示范验证了提出方法的可行性,展现了多用户服务选择技术理论成果在实际场景下的应用效果。
[Abstract]:With the increasing convenience of service publishing and deployment, it is more and more common for multiple users to request the same function attributes at the same time. In the service selection for multi-user requests, the same service resources are often used by multiple users simultaneously. The increase in the number of candidate services leads to low efficiency in service selection. At the same time, due to a lack of professional knowledge, Most users are unable to express their needs accurately. In this paper, the above problems are studied in depth. The main work is as follows: 1) A service selection method based on interval number distance is proposed from the user's point of view: first of all, Use interval numbers to help users better express their needs. Second, The hierarchical clustering method is used to group the user requirements so as to reduce the number of user requirements. On this basis, a suitable service is selected for each user according to the matching degree between the user demand and the service. Finally, The feasibility and effectiveness of the proposed method. 2) from the point of view of service, a bidirectional service selection method based on discrete coefficients is proposed. Firstly, the concept of service stability is introduced in this method. By calculating and updating the discrete coefficients of QoS, the candidate services with low stability are dynamically eliminated. Then, a bidirectional service selection method is proposed to better meet the needs of users and avoid service overload. The feasibility and effectiveness of the proposed method are verified by simulation experiments. 3) based on the above theoretical research results, Service recommendation prototype system and catering service selection application demonstration are designed and developed. The design of service recommendation prototype system follows requirements analysis, summary design, detailed design, Function realization and so on. The application demonstration of catering service selection completes the functional modules such as demand clustering, service filtering, service selection, etc. The prototype system and application demonstration verify the feasibility of the proposed method. The application effect of the multi-user service selection theory in the actual situation is presented.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.09

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