项目名称: 基于期望模型的网络服务协同约束方法研究
项目编号: No.60803143
项目类型: 青年科学基金项目
立项/批准年度: 2009
项目学科: 轻工业、手工业
项目作者: 刘方方
作者单位: 上海大学
项目金额: 18万元
中文摘要: 当前网络服务面临难以有效协同工作的难题。本项目针对网络服务的特点,根据实现有效服务协同所需要解决的主要问题,从服务表示,服务发现,服务组织,服务协同评估,服务协同模型验证等方面建立起实现有效网络服务协同的方法。首先利用知识图来对用户期望与网络服务资源期望进行统一表示,使用户与服务之间可互操作,此种表示方法以网络中实际使用的服务为对象,可以直接应用于网络服务的各项研究中。基于该服务表示,建立改进二分图的网络服务发现方法,此发现方法将服务描述中的隐性语义联系与显性的服务描述相结合,来比较服务之间的功能相似度,比已有发现方法具有更高的发现效率。基于服务表示,建立网络服务流,将功能相关的服务进行有效组织。基于服务流,建立的服务协同评估模型从实际的用户需求出发,将用户对服务资源的使用偏好与通过计算得到的服务关联相结合,解决用户期望与服务期望的不一致带来的协同效率低下的问题。基于上述工作,建立面向功能的服务组合行为分析模型,此模型具有较好的描述能力,并从系统的角度对服务组合行为进行建模,利用该模型可验证服务组合的有效性,为服务协同工作提供保证。以上工作的完成可实现高效的服务协同。
中文关键词: 网络服务;服务协同;服务发现
英文摘要: The development of web service faces the challenge that it's difficult to realize the collaboration of web services. In this project, the problem is resolved through the following aspects: the representation of web service, service discovery, service organization, evaluation of services collaboration and the model of services collaboration. Firstly, KM(knowledge map)is utilized to describe the function of web service and the expectation of user's requirement, which aims at web services in practical web environment and can be applied directly to the applications of web service. Based on the description of web service by KM, the method of service discovery is proposed. The implied association among terms of service descriptions are considered in this method and compared to the existing work, it has better efficiency. To connect services with related functions, the associated service flows are built. The evaluation model is based on the associated service flows, which can help find services that can be composed together and thus improve the efficiency of service collaboration. Upon the above work, the function oriented formal model is built. With its capability of specifying the functions and the behavior of services from the system view, the model is more applicable to the verification of different constraints of service composition. The work in this project helps improve the efficiency of web service collaboration.
英文关键词: Web service; service collaboration; service discovery