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arXiv 1203.3473cs.AI
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关系连续模型的提升推理

Lifted Inference for Relational Continuous Models

University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Rutgers, The State University of New Jersey(罗格斯大学(新泽西州立大学))

Jaesik Choi, Eyal Amir, David J. Hill

摘要:

当属性具有连续域时,关系连续模型(RCM)表示对象属性上的联合概率密度。通过关系表示,它们可以以自然的方式对大量变量的联合概率分布进行建模。本文提出了一种新的精确提升推理算法的RCM,因此,它的规模扩大到大型模型的现实世界的应用。该算法适用于关系成对模型,这些模型是2元势的(关系)乘积。我们的算法在两个方面是独一无二的。首先,它大大提高了连续域变量提升推理的效率。当关系模型具有高斯势时,与先前方法的立方时间相比,它只需要线性时间。第二,它是第一个以提升的方式处理RCM的精确推理算法。该算法是说明了一个例子,从计量经济学。实验结果表明,我们的算法优于地面推理算法和算法建立与以前已知的提升方法。

英文摘要:

Relational Continuous Models (RCMs) represent joint probability densities over attributes of objects, when the attributes have continuous domains. With relational representations, they can model joint probability distributions over large numbers of variables compactly in a natural way. This paper presents a new exact lifted inference algorithm for RCMs, thus it scales up to large models of real world applications. The algorithm applies to Relational Pairwise Models which are (relational) products of potentials of arity 2. Our algorithm is unique in two ways. First, it substantially improves the efficiency of lifted inference with variables of continuous domains. When a relational model has Gaussian potentials, it takes only linear-time compared to cubic time of previous methods. Second, it is the first exact inference algorithm which handles RCMs in a lifted way. The algorithm is illustrated over an example from econometrics. Experimental results show that our algorithm outperforms both a groundlevel inference algorithm and an algorithm built with previously-known lifted methods.

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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