【摘要】 云计算是一个更先进的计算概念,是网格计算和分布式计算的延伸。基于XML的主动Web服务具有异构性、海量性、按需服务等特点,因此可看作是具有网络计算能力的云计算的应用之一。面对互联网海量的异构半/非结构化数据,过滤引擎执行效率通常是该系统的瓶颈所在。鉴于此,利用森林文法提出HXFA机算法以提高执行匹配能力,结合云计算思想,将该算法应用于提出的主动服务HXPS原型系统中,并阐述该系统的组成及其关键技术。更多还原

【Abstract】 The cloud computing is an advanced computing concept and it is developed based on grid computing and distributed computing.XML active web service has following characteristics:data heterogeneity,data magnitude and service on demand which can be regarded as the application of the cloud computing with the ability of network computing.Facing the massive heterogeneous semi/non-structure data from the internet,the execution of the filter method is always the neck of the whole system.In view of this,this paper proposed hedge automata and its HXFA algorithm in order to improve the execution efficiency.Then,combining with the concept of the cloud computing,the algorithm is applied into the HXPS system and the system architecture and key techniques are presented in this paper.更多还原