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arXiv 1304.0897cs.AI
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STRIPS规划中的对偶性

Duality in STRIPS planning

Max-Planck-Institut für Informatik(马克斯·普朗克信息学研究所);Saarland University(萨尔大学);Charles University(查理大学)

Martin Suda

摘要:

我们描述了一个二元映射的规划任务之间的CNOPS。通过交换初始条件和目标条件,取它们各自的补项,并为每个动作交换其前提条件和删除列表,我们可以为每个ARIPS任务获得其对偶版本,当且仅当原始版本有解时,它才有解。这是证明了所描述的转换基本上把前进(向前搜索)到回归(向后搜索),反之亦然。这种二元性通过允许从一种搜索方法到另一种搜索方法的思想转移,为搜索引擎规划提供了新的思路。它可以用来从旧的算法构造新的算法,或者(等价地)从现有的算法中获得新的基准。实验表明,IPC基准的双重版本一般是相当困难的现代规划师。这可以被视为一个新的挑战。另一方面,对偶版本更容易解决的情况表明,对偶性在实践中也是有用的。

英文摘要:

We describe a duality mapping between STRIPS planning tasks. By exchanging the initial and goal conditions, taking their respective complements, and swapping for every action its precondition and delete list, one obtains for every STRIPS task its dual version, which has a solution if and only if the original does. This is proved by showing that the described transformation essentially turns progression (forward search) into regression (backward search) and vice versa. The duality sheds new light on STRIPS planning by allowing a transfer of ideas from one search approach to the other. It can be used to construct new algorithms from old ones, or (equivalently) to obtain new benchmarks from existing ones. Experiments show that the dual versions of IPC benchmarks are in general quite difficult for modern planners. This may be seen as a new challenge. On the other hand, the cases where the dual versions are easier to solve demonstrate that the duality can also be made useful in practice.

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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