scholarly journals Bayesian inference for transductive learning of kernel matrix using the Tanner-Wong data augmentation algorithm

Author(s):  
Zhihua Zhang ◽  
Dit-Yan Yeung ◽  
James T. Kwok
2006 ◽  
Vol 63 (1) ◽  
pp. 69-101 ◽  
Author(s):  
Zhihua Zhang ◽  
James T. Kwok ◽  
Dit-Yan Yeung

Biostatistics ◽  
2010 ◽  
Vol 11 (2) ◽  
pp. 317-336 ◽  
Author(s):  
Sylvia Frühwirth-Schnatter ◽  
Saumyadipta Pyne

Abstract Skew-normal and skew-t distributions have proved to be useful for capturing skewness and kurtosis in data directly without transformation. Recently, finite mixtures of such distributions have been considered as a more general tool for handling heterogeneous data involving asymmetric behaviors across subpopulations. We consider such mixture models for both univariate as well as multivariate data. This allows robust modeling of high-dimensional multimodal and asymmetric data generated by popular biotechnological platforms such as flow cytometry. We develop Bayesian inference based on data augmentation and Markov chain Monte Carlo (MCMC) sampling. In addition to the latent allocations, data augmentation is based on a stochastic representation of the skew-normal distribution in terms of a random-effects model with truncated normal random effects. For finite mixtures of skew normals, this leads to a Gibbs sampling scheme that draws from standard densities only. This MCMC scheme is extended to mixtures of skew-t distributions based on representing the skew-t distribution as a scale mixture of skew normals. As an important application of our new method, we demonstrate how it provides a new computational framework for automated analysis of high-dimensional flow cytometric data. Using multivariate skew-normal and skew-t mixture models, we could model non-Gaussian cell populations rigorously and directly without transformation or projection to lower dimensions.


2021 ◽  
Author(s):  
Binghua Li ◽  
Zhiwen Zhang ◽  
Feng Duan ◽  
Zhenglu Yang ◽  
Qibin Zhao ◽  
...  

2021 ◽  
Author(s):  
Liang Chen ◽  
Kunpeng Zheng ◽  
Yang Li ◽  
Xuelian Yang ◽  
Han Zhang ◽  
...  

OTN (Optical Transmission Networks) is one of the mainstream infrastructures over the ground-transmission networks, with the characteristics of large bandwidth, low delay, and high reliability. To ensure a stable working of OTN, it is necessary to preform high-level accurate functions of data traffic analysis, alarm prediction, and fault location. However, there is a serious problem for the implementation of these functions, caused by the shortage of available data but a rather-large amount of dirty data existed in OTN. In the view of current pretreatment, the extracted amount of effective data is very less, not enough to support machine learning. To solve this problem, this paper proposes a data augmentation algorithm based on deep learning. Specifically, Data Augmentation for Optical Transmission Networks under Multi-condition constraint (MVOTNDA) is designed based on GAN Mode with the demonstration of variable-length data augmentation method. Experimental results show that MVOTNDA has better performances than the traditional data augmentation algorithms.


2020 ◽  
Vol 195 ◽  
pp. 105600
Author(s):  
Yan Leng ◽  
Weiwei Zhao ◽  
Chan Lin ◽  
Chengli Sun ◽  
Rongyan Wang ◽  
...  

2015 ◽  
Vol 24 (4) ◽  
pp. 1114-1133
Author(s):  
Subhadip Pal ◽  
Kshitij Khare ◽  
James P. Hobert

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