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arXiv 1003.3201stat.CO
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协方差自适应切片采样

Covariance-Adaptive Slice Sampling

Madeleine Thompson, Radford M. Neal

摘要:

我们描述了两个切片采样方法,采用多变量步骤的面包屑框架。这些方法使用被拒绝的建议的梯度来适应对数密度表面的局部曲率,当参数高度相关时,这种技术可以产生更好的建议。我们评估我们的方法在四个分布和比较它们的性能的非自适应切片采样方法和大都会方法。自适应方法在具有高度相关参数的低维目标分布上表现良好。

英文摘要:

We describe two slice sampling methods for taking multivariate steps using the crumb framework. These methods use the gradients at rejected proposals to adapt to the local curvature of the log-density surface, a technique that can produce much better proposals when parameters are highly correlated. We evaluate our methods on four distributions and compare their performance to that of a non-adaptive slice sampling method and a Metropolis method. The adaptive methods perform favorably on low-dimensional target distributions with highly-correlated parameters.

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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