图的支撑树数是图的重要的不变量，也是网络可靠性的重要量度。

The number of spanning trees is an important invariant of a graph, it is also an important measure of the reliability of a network.

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介绍了湍流不变量图在圆管湍流研究中的应用，分析了离壁距离和雷诺数对管流湍流结构的影响。

The anisotropy invariant map was also introduced briefly. The effect of the distance away from the wall and the Reynolds number on the turbulence structure in a pipe flow was also analysed.

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