update cycle

Extending Virtual Description Model describes logic construction of modules by Extended Tag Tree, and describes operation Create, insert, update and delete of module by branch, graft, prune and disbranch in one growing cycle of Extended Tag Tree.

扩充的虚拟表示模型通过扩展标记树来描述模块的逻辑结构，并采用标记树生长周期中的发枝、嫁接、修剪与剪枝来描述模块的创建、插入、更新和删除操作。

In this paper, an improved data warehouse structure model is presented in which an auxiliary structure is added to the warehouse to accept the updates and store them until the data warehouse has available cycle time to incorporate the new data and update the necessary views.

文章提出一种改进的数据仓库体系结构，在数据仓库中添加一个辅助结构作为接收和存储更新数据的暂存库，直到数据仓库获得空闲周期，加入新的数据和更新必要的视图；

Based on Normal graph, the update formulas for message passing are derived and further the optimality of message passing algorithm for cycle-free graphs is proved. Finally, the issues affecting message passing in graphs with cycles are analyzed.

基于Normal图，推导了消息传递算法的迭代公式，论述了无环图上消息传递算法的最优性，并分析了影响有环图上消息传递的因素；