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新的贝叶斯推断方法改进了复杂模型的基于仿真的校准

研究人员开发了用于具有难解似然但可处理前向模拟的模型的新型模拟贝叶斯推断(SBI)方法。第一项贡献引入了一种顺序程序,使用渐进局部化、数据驱动的条件密度近似作为提议分布,最后通过重要性采样步骤校正后验分布。第二项贡献是局部模拟校准(SBC),它通过拟合和重用伪观测值之间的局部代理模型和比率估计器,以低计算成本探测比后验更广泛邻域的校准。这些方法在三个案例研究中进行了评估,包括一个流行病学应用。 AI

排序理由 该集群包含一篇详细介绍新统计方法的学术论文。[lever_c_demoted from research: ic=1 ai=0.4]

在 arXiv stat.ML 阅读 →

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新的贝叶斯推断方法改进了复杂模型的基于仿真的校准

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该集群包含一篇详细介绍新统计方法的学术论文。[lever_c_demoted from research: ic=1 ai=0.4]
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报道来源 [1]

  1. arXiv stat.ML TIER_1 English(EN) · Umberto Picchini ·

    不可处理似然函数的分摊比率估计重要性采样和局部基于仿真的校准

    arXiv:2609.39712v1 Announce Type: cross Abstract: We consider simulation-based Bayesian inference (SBI) for the parameters of models with intractable likelihoods but tractable forward simulation. Building on Gaussian mixtures-of-experts surrogates, as a first contribution we deve…