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English(EN) Robust Covariance Estimation for Entry-wise Contaminated and Partially Observed Data via Expectation Maximization Algorithm

新的SAEM算法增强了不完整数据的鲁棒协方差估计

研究人员开发了一种新的鲁棒协方差估计方法,该方法对于部分观测且包含逐项污染的数据特别有用。所提出的方法使用随机近似EM(SAEM)算法将Student-t*模型的推断扩展到不完整观测。该方法将坐标尺度上的随机更新与Rao-Blackwellized高斯条件矩相结合,避免了显式采样潜在高斯变量的需要。实验表明,在具有扩散性污染的中高异常值率下,该SAEM算法在Fisher-Rao误差方面优于包括高斯、Student-t和插补方法在内的现有估计器。 AI

影响 引入了一种新颖的统计方法,可以提高处理嘈杂和不完整数据集的机器学习模型的可靠性。

排序理由 详细介绍新统计算法及其实验验证的学术论文。[lever_c_demoted from research: ic=1 ai=0.7]

在 arXiv cs.LG 阅读 →

AI 生成摘要 · Google Gemini · 来自 1 个来源。 我们如何撰写摘要 →

新的SAEM算法增强了不完整数据的鲁棒协方差估计

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详细介绍新统计算法及其实验验证的学术论文。[lever_c_demoted from research: ic=1 ai=0.7]
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报道来源 [1]

  1. arXiv cs.LG TIER_1 English(EN) · Matys Savidan, Mohammed Nabil El Korso ·

    基于期望最大化算法的带入式污染和部分观测数据的鲁棒协方差估计

    arXiv:2610.21709v1 Announce Type: cross Abstract: Robust covariance estimation under entry-wise contamination and missing data is challenging in various signal processing applications. Under the Student-$t$ model, observation-level reweighting induces a uniform attenuation across…