采用有向图的矩阵表示，得到了线有向图的幂敛指数和周期的有关结果。

By using the matrix representation of a digraph, some results about the index of convergence and period of a line digraph are obtained.

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将粗糙集理论和传统图论相结合，给出基于粗糙集思想的传统图的等价定义及粗糙图的定义，并进一步给出了粗糙图的矩阵表示及粗糙图的粗糙性分析。

By combining the rough set theory with the traditional graph theory, the equal definition of classical graph is presented based on the idea of rough set theory.

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OV - 3矩阵中的每一行表示一个IER，由在OV - 6 c序列图的交互中的角色和对象间转移的数据的特征组成。

Each row in the OV-3 matrix represents an IER, which is made up of characteristics of the data transferred between roles and objects in an interaction from the OV-6c sequence diagrams.

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