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arXiv 1807.09155stat.CO
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软多元截断正态分布及其在贝叶斯约束估计中的应用

The Soft Multivariate Truncated Normal Distribution with Applications to Bayesian Constrained Estimation

Allyson Souris, Anirban Bhattacharya, Debdeep Pati

摘要:

我们提出了一种新的分布,称为软tMVN分布,它提供了一个光滑的近似截断多元正态分布(tMVN)与线性约束。提出了一种高效的分块Gibbs采样器,用于对软tMVN分布进行高维采样。我们提供的软tMVN的逼近能力的理论支持,并提供进一步的经验证据。软tMVN分布可用于从具有线性约束的多变量截断正态分布近似模拟,或其本身作为形状约束问题中的先验。

英文摘要:

We propose a new distribution, called the soft tMVN distribution, which provides a smooth approximation to the truncated multivariate normal (tMVN) distribution with linear constraints. An efficient blocked Gibbs sampler is developed to sample from the soft tMVN distribution in high dimensions. We provide theoretical support to the approximation capability of the soft tMVN and provide further empirical evidence thereof. The soft tMVN distribution can be used to approximate simulations from a multivariate truncated normal distribution with linear constraints, or itself as a prior in shape-constrained problems.

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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