loop-free directed graph [计] 无循环定向图
loop free directed graph 无循环定向图
free directed graph
自由有向图
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Secondly, based on distributing the free parking spot into the weighted directed graph, this paper calculates the shortest path with the ant colony algorithm.
其次，将停车场空闲车位的分布转化为一带权有向图，在此基础上用蚁群算法进行了最短路径计算。
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