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arXiv 1302.6798cs.AI
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行为的结构化概率表示

A Structured, Probabilistic Representation of Action

Stanford University(斯坦福大学)

Ron Davidson, Michael R. Fehling

摘要:

当智能体在现实世界中设计执行计划时,他们面临两种重要形式的不确定性:他们永远无法完全了解世界的状态,并且他们没有完全的控制权,因为他们的行动的效果是不确定的。虽然大多数经典的规划方法避免明确的不确定性推理,我们认为,不确定性应该明确表示和推理。我们开发了一个概率表示的状态和行动,基于信念网络。我们定义了条件信念网(CBN),以捕捉一个动作对世界状态的影响的概率依赖性。我们还使用CBN来表示环境中实体之间的内在关系,这些关系在状态之间持续存在。我们提出了一个简单的投影算法来构建一个行动的后续状态的信念网络,使用环境CBN模型来推断间接影响。我们讨论了如何定性方面的信念网络和CBN使他们适合的各个阶段的问题解决过程中,从模型构建规划算法的设计。

英文摘要:

When agents devise plans for execution in the real world, they face two important forms of uncertainty: they can never have complete knowledge about the state of the world, and they do not have complete control, as the effects of their actions are uncertain. While most classical planning methods avoid explicit uncertainty reasoning, we believe that uncertainty should be explicitly represented and reasoned about. We develop a probabilistic representation for states and actions, based on belief networks. We define conditional belief nets (CBNs) to capture the probabilistic dependency of the effects of an action upon the state of the world. We also use a CBN to represent the intrinsic relationships among entities in the environment, which persist from state to state. We present a simple projection algorithm to construct the belief network of the state succeeding an action, using the environment CBN model to infer indirect effects. We discuss how the qualitative aspects of belief networks and CBNs make them appropriate for the various stages of the problem solving process, from model construction to the design of planning algorithms.

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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