Robust Estimation of Latent Tree Graphical Models: Inferring Hidden States With Inexact Parameters

Robust Estimation of Latent Tree Graphical Models: Inferring Hidden States With Inexact Parameters
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潜在树图模型的鲁棒估计:推断具有不精确参数的隐藏状态

DOI:
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发表时间:
2011
影响因子:
2.5
通讯作者:
A. Sly
A. Sly
中科院分区:
计算机科学2区
文献类型:
--
作者:
Elchanan Mossel;S. Roch;A. Sly

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隐树图模型广泛应用于计算生物学、信号和图像处理以及网络断层扫描。在这里,我们为潜在树模型(包括高斯模型和离散可逆模型)设计了一种新的高效估计过程,该过程显着改进了之前的样本要求界限。我们的技术是基于一个新的隐藏状态估计,是强大的估计参数的不准确性。更准确地说,我们证明了潜在树模型可以估计高概率在所谓的Kesten-Stigum制度与O(log 2n)的样本,其中n是节点的数量。
Latent tree graphical models are widely used in computational biology, signal and image processing, and network tomography. Here, we design a new efficient, estimation procedure for latent tree models, including Gaussian and discrete, reversible models, that significantly improves on previous sample requirement bounds. Our techniques are based on a new hidden state estimator that is robust to inaccuracies in estimated parameters. More precisely, we prove that latent tree models can be estimated with high probability in the so-called Kesten-Stigum regime with O(log2n) samples, where n is the number of nodes.
DOI: 10.1007/978-3-319-11433-0_3
发表时间: 2014
期刊: --
影响因子: --
作者:
Ben Mrad A
通讯作者: Ben Mrad A