And the bottom is an execution level which holds the concrete drive and measurement;then,according to their function and resources all the tasks involving flight control.

We present the Event Driven Hierarchy model (EDHM) of execution center, aiming at fulfilling the requirements of direct manipulation such as real time feedback and concurrent dialog in multi task CAD systems.

The influence of central executive of working memory on arithmetic cognitive strategies of 113 children in primary 2 by using dual-task paradigm was explored.

Compared to the phonological loop and the visuospatial sketch pad, the central executive may have a key role in children s arithmetic cognition.