arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1107.4035cs.AI
收藏

基于完全提升搜索的概率推理

Towards Completely Lifted Search-based Probabilistic Inference

David Poole, Fahiem Bacchus, Jacek Kisynski

摘要:

提升概率推理的承诺是在关系概率模型中进行概率推理,而不需要通过将未区分的个体视为一个块来单独推理每个个体(接地表示)。在某些情况下,当前的精确方法仍然需要进行扩展,这通常是因为在提升操作下,中间结果的表示不是封闭的。我们开始回答这样一个问题,即是否有一些根本原因,为什么提升的算法需要淘汰未分化的个体。我们有两个主要结果:(1)我们完整地刻画了在种群规模为多项式的情况下,我们如何在种群规模为对数的时间多项式中进行提升推理。(2)对于无参数和单参数化随机变量的情况下,接地不是多项式的人口规模,我们提出了解除推断,这是多项式的人口规模,而接地是指数。这两种情况都不需要对没有明确提到的个人单独进行推理。

英文摘要:

The promise of lifted probabilistic inference is to carry out probabilistic inference in a relational probabilistic model without needing to reason about each individual separately (grounding out the representation) by treating the undistinguished individuals as a block. Current exact methods still need to ground out in some cases, typically because the representation of the intermediate results is not closed under the lifted operations. We set out to answer the question as to whether there is some fundamental reason why lifted algorithms would need to ground out undifferentiated individuals. We have two main results: (1) We completely characterize the cases where grounding is polynomial in a population size, and show how we can do lifted inference in time polynomial in the logarithm of the population size for these cases. (2) For the case of no-argument and single-argument parametrized random variables where the grounding is not polynomial in a population size, we present lifted inference which is polynomial in the population size whereas grounding is exponential. Neither of these cases requires reasoning separately about the individuals that are not explicitly mentioned.

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。

↑