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arXiv 1302.4987cs.AI
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时间相关不确定性下的路径规划

Path Planning under Time-Dependent Uncertainty

University of Michigan(密歇根大学)

Michael P. Wellman, Matthew Ford, Kenneth Larson

摘要:

在图中寻找最短路径的标准算法要求路径的成本在边成本中是可加的,并且通常假设成本是确定性的。我们考虑的问题,不确定的边缘成本,潜在的概率之间的依赖关系的成本。虽然这些依赖关系违反了标准的动态规划分解,我们确定了一个较弱的随机一致性条件,证明了一个广义的动态规划方法的基础上随机优势。我们提出了一个修正的路径规划算法,并证明它产生最优路径下的时间依赖的不确定成本。我们测试的算法,将其应用到随机总线网络的模型,并提出经验的性能结果比较它的一些替代品。最后,我们考虑将这些概念扩展到不确定性下更一般的一类启发式搜索问题。

英文摘要:

Standard algorithms for finding the shortest path in a graph require that the cost of a path be additive in edge costs, and typically assume that costs are deterministic. We consider the problem of uncertain edge costs, with potential probabilistic dependencies among the costs. Although these dependencies violate the standard dynamic-programming decomposition, we identify a weaker stochastic consistency condition that justifies a generalized dynamic-programming approach based on stochastic dominance. We present a revised path-planning algorithm and prove that it produces optimal paths under time-dependent uncertain costs. We test the algorithm by applying it to a model of stochastic bus networks, and present empirical performance results comparing it to some alternatives. Finally, we consider extensions of these concepts to a more general class of problems of heuristic search under uncertainty.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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