通过将交通路网中路径搜索的定向式启发策略与深度优先的树搜索算法相结合，提出了一种有效路径的定向树搜索算法。
Combining the directional heuristic strategy with the tree searching algorithm of depth priority, an orientated tree algorithm of searching efficient paths is proposed.
在证书链的搜索算法中，通过对多重边的有向无环图用深度优先和广度优先算法结合实现对证书链的搜索，避免证书图中产生的环形链而导致低搜索效率问题。
Furthermore, an algorithm of certificate chain processing is presented, which searches the DAGs, and a DAG by depth-first-algorithm, and inter-DAGs by breadth-first-algorithm.
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