.png){kind=icon}
返回
Clustering using objective functions and stochastic search
.png){kind=icon}
OA
AI
DOI：10.1111/j.1467-9868.2007.00629.x.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
A new approach to clustering multivariate data, based on a multilevel linear mixed model, is proposed. A key feature of the model is that observations from the same cluster are correlated, because they share cluster-specific random effects. The inclusion of cluster-specific random effects allows parsimonious departure from an assumed base model for cluster mean profiles. This departure is captured statistically via the posterior expectation, or best linear unbiased predictor. One of the parameters in the model is the true underlying partition of the data, and the posterior distribution of this parameter, which is known up to a normalizing constant, is used to cluster the data. The problem of finding partitions with high posterior probability is not amenable to deterministic methods such as the EM algorithm. Thus, we propose a stochastic search algorithm that is driven by a Markov chain that is a mixture of two Metropolis-Hastings algorithms-one that makes small scale changes to individual objects and another that performs large scale moves involving entire clusters. The methodology proposed is fundamentally different from the well-known finite mixture model approach to clustering, which does not explicitly include the partition as a parameter, and involves an independent and identically distributed structure.
Keyword:
Bayesian model
best linear unbiased predictor
cluster analysis
linear mixed model
Markov chain Monte Carlo methods
Metropolis-Hastings algorithm
microarray
quadratic penalized splines
set partition
yeast cell cycle
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
J
IF:
3.6
论文数:
1.5K
被引数:
3.2W
机构
引用论文
Comprehensive identification of cell cycle-regulated genes of the yeast Saccharomyces cerevisiae by microarray hybridization通过微阵列杂交全面鉴定酿酒酵母的细胞周期调控基因OAAI
OAAI分享收藏Patients with radiographic axial spondylarthritis have an impaired dietary intake—a cross-sectional study with matched controls from northern Sweden放射学轴性脊柱关节炎患者的饮食摄入受损——一项来自瑞典北部的配对对照横断面研究
OAAI
OAAI分享收藏Catalytic etherification of hydroxyl compounds to methyl ethers with 1,2-dimethoxyethane用1，2-二甲氧基乙烷将羟基化合物催化醚化为甲基醚.png)
RSC Advances
RSC AdvancesIF0
PREAI
分享收藏
查看更多内容