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pro vyhledávání: '"P McNicholas"'
Zhu and Melnykov (2018) develop a model to fit mixture models when the components are derived from the Manly transformation. Their EM algorithm utilizes Nelder-Mead optimization in the M-step to update the skew parameter, $\boldsymbol{\lambda}_g$. An
Externí odkaz:
http://arxiv.org/abs/2410.00848
While advances continue to be made in model-based clustering, challenges persist in modeling various data types such as panel data. Multivariate panel data present difficulties for clustering algorithms because they are often plagued by missing data
Externí odkaz:
http://arxiv.org/abs/2404.04122
Autor:
Adams, Ashleigh, Elder, Jennifer, Lafrenière, Nadia, McNicholas, Erin, Striker, Jessica, Welch, Amanda
We perform a systematic study of permutation statistics and bijective maps on permutations using SageMath to search the FindStat combinatorial statistics database to identify apparent instances of the cyclic sieving phenomenon (CSP). Cyclic sieving o
Externí odkaz:
http://arxiv.org/abs/2402.16251
A mixture of multivariate Poisson-log normal factor analyzers is introduced by imposing constraints on the covariance matrix, which resulted in flexible models for clustering purposes. In particular, a class of eight parsimonious mixture models based
Externí odkaz:
http://arxiv.org/abs/2311.07762
Matrix-variate distributions are a recent addition to the model-based clustering field, thereby making it possible to analyze data in matrix form with complex structure such as images and time series. Due to its recent appearance, there is limited li
Externí odkaz:
http://arxiv.org/abs/2310.05288
Publikováno v:
Sports Medicine and Health Science, Vol 6, Iss 4, Pp 331-337 (2024)
Previous studies have shown that Physical Activity (PA) has a positive association with emotional health and intelligence in adolescents but none have focused on the relationship of PA duration and intensity on Emotional Intelligence (EI). The purpos
Externí odkaz:
https://doaj.org/article/6714a40008a645dc9ae214b47698345a
Publikováno v:
Intensive Care Medicine Experimental, Vol 12, Iss 1, Pp 1-12 (2024)
Abstract Background Acute Respiratory Distress Syndrome (ARDS) has a high morbidity and mortality. One therapy that can decrease mortality is ventilation in the prone position (PP). Patients undergoing PP are amongst the sickest, and there is a need
Externí odkaz:
https://doaj.org/article/a750bdb193e74f70a2b05eb61897d75d
Many common clustering methods cannot be used for clustering multivariate longitudinal data in cases where variables exhibit high autocorrelations. In this article, a copula kernel mixture model (CKMM) is proposed for clustering data of this type. Th
Externí odkaz:
http://arxiv.org/abs/2307.11682
Interval-closed sets of a poset are a natural superset of order ideals. We initiate the study of interval-closed sets of finite posets from enumerative and dynamical perspectives. In particular, we use the generalized toggle group to define rowmotion
Externí odkaz:
http://arxiv.org/abs/2307.08520
The importance of variable selection for clustering has been recognized for some time, and mixture models are well-established as a statistical approach to clustering. Yet, the literature on variable selection in model-based clustering remains largel
Externí odkaz:
http://arxiv.org/abs/2305.16464