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arXiv 2211.08243cs.LG
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神经贝叶斯网络替补

Neural Bayesian Network Understudy

IDLab(IDLab实验室);Ghent University(根特大学);imec(比利时微电子研究中心)

Paloma Rabaey, Cedric De Boom, Thomas Demeester

摘要:

贝叶斯网络由于包含因果知识而可能对临床决策有吸引力,但由于无法处理非结构化数据,其实际应用仍然有限。虽然神经网络没有这种限制,但它们是不可解释的,并且本质上无法处理输入空间中的因果结构。我们的目标是构建结合两种方法优点的神经网络。受在训练这种神经网络时注入因果知识的观点的启发,这项工作提出了朝这个方向迈出的初步步骤。我们演示了如何训练神经网络来输出条件概率,提供与贝叶斯网络大致相同的功能。此外,我们提出了两个训练策略,允许编码的独立关系推断出一个给定的因果结构到神经网络。我们在概念验证环境中给出了初步结果,表明神经模型作为贝叶斯网络的替补,近似其概率和因果属性。

英文摘要:

Bayesian Networks may be appealing for clinical decision-making due to their inclusion of causal knowledge, but their practical adoption remains limited as a result of their inability to deal with unstructured data. While neural networks do not have this limitation, they are not interpretable and are inherently unable to deal with causal structure in the input space. Our goal is to build neural networks that combine the advantages of both approaches. Motivated by the perspective to inject causal knowledge while training such neural networks, this work presents initial steps in that direction. We demonstrate how a neural network can be trained to output conditional probabilities, providing approximately the same functionality as a Bayesian Network. Additionally, we propose two training strategies that allow encoding the independence relations inferred from a given causal structure into the neural network. We present initial results in a proof-of-concept setting, showing that the neural model acts as an understudy to its Bayesian Network counterpart, approximating its probabilistic and causal properties.

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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