本文提出了基于会话的连接与基于变化的数据捕获相结合，利用时间戳的客户端数据优先规则的同步方案。
This paper brings forward a synchronization scheme combines session connection with data gain base on changed, and client side data priority base on timestamp.
SERVIR能够捕获图像和环境数据，例如危险天气以及水资源利用的变化。
SERVIR captures images and environmental data, like dangerous weather and changes in water resource use.
当采用传统的方法对数据仓库进行维护时，所捕获到的变化信息将被直接应用到仓库中相应的表或实视图上。
When the data warehouse is maintained in usual way, change information will be directly applied to the tables and materialized views in the warehouse. In this paper, a Delta table method is proposed.
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