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pro vyhledávání: '"Nicholls, Geoff K."'
Autor:
Zafar, Schyan, Nicholls, Geoff K.
Generalised Bayesian Inference (GBI) attempts to address model misspecification in a standard Bayesian setup by tempering the likelihood. The likelihood is raised to a fractional power, called the learning rate, which reduces its importance in the po
Externí odkaz:
http://arxiv.org/abs/2410.01475
Partial orders may be used for modeling and summarising ranking data when the underlying order relations are less strict than a total order. They are a natural choice when the data are lists recording individuals' positions in queues in which queue o
Externí odkaz:
http://arxiv.org/abs/2408.14661
Autor:
Zafar, Schyan, Nicholls, Geoff K.
Publikováno v:
Computational Statistics & Data Analysis, Volume 199, 2024, 108011, ISSN 0167-9473
Word meanings change over time, and word senses evolve, emerge or die out in the process. For ancient languages, where the corpora are often small and sparse, modelling such changes accurately proves challenging, and quantifying uncertainty in sense-
Externí odkaz:
http://arxiv.org/abs/2311.00541
TraitLab is a software package for simulating, fitting and analysing tree-like binary data under a stochastic Dollo model of evolution. The model also allows for rate heterogeneity through catastrophes, evolutionary events where many traits are simul
Externí odkaz:
http://arxiv.org/abs/2308.09060
Partial orders are a natural model for the social hierarchies that may constrain "queue-like" rank-order data. However, the computational cost of counting the linear extensions of a general partial order on a ground set with more than a few tens of e
Externí odkaz:
http://arxiv.org/abs/2306.15827
Classification of unlabeled data is usually achieved by supervised learning from labeled samples. Although there exist many sophisticated supervised machine learning methods that can predict the missing labels with a high level of accuracy, they ofte
Externí odkaz:
http://arxiv.org/abs/2306.15622
Autor:
Nicholls, Geoff K., Lee, Jeong Eun, Karn, Nicholas, Johnson, David, Huang, Rukuang, Muir-Watt, Alexis
In the eleventh and twelfth centuries in England, Wales and Normandy, Royal Acta were legal documents in which witnesses were listed in order of social status. Any bishops present were listed as a group. For our purposes, each witness-list is an orde
Externí odkaz:
http://arxiv.org/abs/2212.05524
Autor:
Carmona, Chris U., Nicholls, Geoff K.
The Cut posterior and related Semi-Modular Inference are Generalised Bayes methods for Modular Bayesian evidence combination. Analysis is broken up over modular sub-models of the joint posterior distribution. Model-misspecification in multi-modular m
Externí odkaz:
http://arxiv.org/abs/2204.00296
Autor:
Zafar, Schyan, Nicholls, Geoff K.
Publikováno v:
In Computational Statistics and Data Analysis November 2024 199
Model-based Bayesian evidence combination leads to models with multiple parameteric modules. In this setting the effects of model misspecification in one of the modules may in some cases be ameliorated by cutting the flow of information from the miss
Externí odkaz:
http://arxiv.org/abs/2201.09706