【摘要】 在介绍数据流及数据流系统的模型后,对降载时的系统约束、输出质量目标进行了正式阐述。提出数据流系统降载策略的分类方法,着重分析了目前一些较为重要的数据流系统降载策略,指出其特征和应用范围,最后总结了好的数据流降载策略应具有的特点以及未来研究的发展趋势。更多还原

【Abstract】 After describing the models of data streams and data stream systems,this paper presented the system constraints of load shedding and the output goals.It presented the classification standards for load shedding in data stream systems.Then analyzed the key mechanisms of existing representative strategies,their characteristic and application area.Finally,summarized the important features that good load shedding strategies,and introduced the future strategies and trends.更多还原