Web 2.0时代,人网交互的便捷赋予了Web服务更多的社会化特性(如评分、评论等),却往往被服务的提供者忽视,导致难以有效实现基于用户体验的服务推荐。针对不同的用户视角,该文提出了一种Web服务综合描述模型,以多视图的方式集成Web服务...Web 2.0时代,人网交互的便捷赋予了Web服务更多的社会化特性(如评分、评论等),却往往被服务的提供者忽视,导致难以有效实现基于用户体验的服务推荐。针对不同的用户视角,该文提出了一种Web服务综合描述模型,以多视图的方式集成Web服务的技术属性(如操作、消息等)和社会化特性。首先,从逻辑设计的角度出发,给出了其概念模型;然后,从工程应用的角度出发,构造其元模型,指导具体模型的设计;最后,根据一个应用案例,验证了方法的可行性。该模型和相关工具将为实现服务超市中服务的主动推荐奠定基础。展开更多
Web repository utilizes materialized views to integrate information,so the most important task for it is torefresh the views periodically to keep its vitality. The goal of view refreshing is to obtain the maximal syst...Web repository utilizes materialized views to integrate information,so the most important task for it is torefresh the views periodically to keep its vitality. The goal of view refreshing is to obtain the maximal system fresh-ness, however, most of traditional standards do not consider query effect so that the corresponding view-refreshingscheme is usually inefficient. In this paper,we first bring forward a more reasonable standard for system freshness,thereafter make a comprehensive discussion upon system refreshing frequency,system resource allocation and view-re-freshing order. After analyzing the effect and function to system freshness for each factor,we give a general strategyfor materialized view refreshing.展开更多
文摘Web repository utilizes materialized views to integrate information,so the most important task for it is torefresh the views periodically to keep its vitality. The goal of view refreshing is to obtain the maximal system fresh-ness, however, most of traditional standards do not consider query effect so that the corresponding view-refreshingscheme is usually inefficient. In this paper,we first bring forward a more reasonable standard for system freshness,thereafter make a comprehensive discussion upon system refreshing frequency,system resource allocation and view-re-freshing order. After analyzing the effect and function to system freshness for each factor,we give a general strategyfor materialized view refreshing.
