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arXiv 1209.0833stat.MEstat.ML
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多分辨率高斯过程

Multiresolution Gaussian Processes

Emily B. Fox, David B. Dunson

摘要:

我们提出了一个多分辨率的高斯过程捕捉远程,非马尔可夫依赖关系,同时允许突变。多分辨率GP分层耦合的光滑GP的集合,每个定义在一个随机嵌套分区的元素。长范围依赖性由顶层GP捕获,而分区点定义突变。由于GP的固有共轭性,可以分析地边缘化GP并计算给定分区树的观测的条件似然。这个属性允许有效的推理分区本身,我们采用图论技术。我们应用多分辨率GP分析脑磁图(MEG)记录的大脑活动。

英文摘要:

We propose a multiresolution Gaussian process to capture long-range, non-Markovian dependencies while allowing for abrupt changes. The multiresolution GP hierarchically couples a collection of smooth GPs, each defined over an element of a random nested partition. Long-range dependencies are captured by the top-level GP while the partition points define the abrupt changes. Due to the inherent conjugacy of the GPs, one can analytically marginalize the GPs and compute the conditional likelihood of the observations given the partition tree. This property allows for efficient inference of the partition itself, for which we employ graph-theoretic techniques. We apply the multiresolution GP to the analysis of Magnetoencephalography (MEG) recordings of brain activity.

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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