Secondly, the program structure of high performance computing applications in the grid environment is analyzed and represented by the directed acyclic graph (DAG).

其次，分析了适用于网格环境的高性能计算应用的程序结构，并通过有向无循环图(DAG)加以表示。

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To evaluate the adequacy of a test suite for testing a program with graphical user interfaces(GUI), new coverage criteria based on directed graph for window navigation was proposed.

为评估图形用户界面（GUI）测试用例集的充分性，提出了基于窗口导航有向图的覆盖准则。

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