Parameter Expansion for Data Augmentation
数据增广的参数扩展AI 解读 ↓
本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。
DOI 首次登记不等于接收或发表日期。部分更正、评论等条目没有独立摘要;缺少可靠材料时保留待补状态。
引用量采用 OpenAlex 单条关联记录,不合计多个记录;关联记录可能包含正式发表版本,不等于此版本单独引用。缺失不视为零,引用指标不代表论文质量。
关注作者按书目中的完整姓名匹配,同名和姓名变体需人工辨别。相关论文先按共享细分方向和具体方法排列,再参考通用方法与发表日期。
AI 根据所提供的论文材料归类:摘要讨论通用贝叶斯计算算法及其理论,没有所列经济计量细分方向的直接证据。
反馈分类问题数据增广的参数扩展AI 解读 ↓
正在核对关联版本…
正在核对对应版本的资源…
Viewing the observed data of a statistical model as incomplete and augmenting its missing parts are useful for clarifying concepts and central to the invention of two well-known statistical algorithms: expectation-maximization (EM) and data augmentation. Recently, Liu, Rubin, and Wu demonstrated that expanding the parameter space along with augmenting the missing data is useful for accelerating iterative computation in an EM algorithm. The main purpose of this article is to rigorously define a parameter expanded data augmentation (PX-DA) algorithm and to study its theoretical properties. The PX-DA is a special way of using auxiliary variables to accelerate Gibbs sampling algorithms and is closely related to reparameterization techniques. We obtain theoretical results concerning the convergence rate of the PX-DA algorithm and the choice of prior for the expansion parameter. To understand the role of the expansion parameter, we establish a new theory for iterative conditional sampling under the transformation group formulation, which generalizes the standard Gibbs sampler. Using the new theory, we show that the PX-DA algorithm with a Haar measure prior (often improper) for the expansion parameter is always proper and is optimal among a class of such algorithms including reparameterization.