To compute the page accessibility, a Path Tree Spanning Algorithm (PTSA) was introduced.

为计算网页可达性，设计了计算到达网页路径的路径树生成算法（PTSA）。

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PTSA provides many possible choices for all sub-projects in a project which will be arranged in serial or parallel way, so PTSA improves the applied value of Topological Sort Algorithm.

PTSA算法为工程中各子工程的串行或并行安排提供了确定的选择，提升了拓扑排序算法的实用价值。

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PTSA provides many possible choices for all sub-projects in a project which will be arranged in serial or parallel way, so PTSA improves the applied value of Topological Sort Algorithm.

PTSA算法为工程中各子工程的串行或并行安排提供了确定的选择，提升了拓扑排序算法的实用价值。

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