mGPT: A Probabilistic Planner Based on Heuristic Search

mGPT: A Probabilistic Planner Based on Heuristic Search
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mGPT:基于启发式搜索的概率规划器

DOI:
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发表时间:
2005
影响因子:
5
通讯作者:
Hector Geffner
Hector Geffner
中科院分区:
计算机科学3区
文献类型:
--
作者:
Blai Bonet;Hector Geffner

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我们描述的版本的GPT规划器中使用的概率轨道的第四届国际规划竞赛(IPC-4)。这个版本称为mGPT,通过提取和使用不同类别的下界沿着与各种启发式搜索算法来解决PPDDL语言中指定的马尔可夫决策过程。从确定性松弛提取的下限,其中的替代概率的影响,一个动作被映射到不同的,独立的,确定性的行动。搜索算法使用这些下界来聚焦更新,并在从初始状态和贪婪策略可到达的所有状态上提供一致的值函数。
We describe the version of the GPT planner used in the probabilistic track of the 4th International Planning Competition (IPC-4). This version, called mGPT, solves Markov Decision Processes specified in the PPDDL language by extracting and using different classes of lower bounds along with various heuristic-search algorithms. The lower bounds are extracted from deterministic relaxations where the alternative probabilistic effects of an action are mapped into different, independent, deterministic actions. The heuristic-search algorithms use these lower bounds for focusing the updates and delivering a consistent value function over all states reachable from the initial state and the greedy policy.