Results 31 to 40 of about 123,391 (326)

A truncated bivariate inverted Dirichlet distribution

open access: yesStatistica, 2013
A truncated version of the bivariate inverted dirichlet distribution is introduced. Unlike the inverted dirichlet distribution, this possesses finite moments of all orders and could therefore be a better model for certain practical situations.
Saralees Nadarajah
doaj   +1 more source

Improving application performance with biased distributions of quantum states

open access: yesPhysical Review Research, 2021
We consider the properties of a specific distribution of mixed quantum states of arbitrary dimension that can be biased towards a specific mean purity. In particular, we analyze mixtures of Haar-random pure states with Dirichlet-distributed coefficients.
Sanjaya Lohani   +5 more
doaj   +1 more source

Value Distribution of General Dirichlet series. VI

open access: yesNonlinear Analysis, 2005
In the paper a limit theorem in the sense of weak convergence of probability measures on the complex plane for a new class of general Dirichlet series is obtained.
A. Laurinčikas
doaj   +1 more source

Implications of Spectral Interlacing for Quantum Graphs

open access: yesEntropy, 2023
Quantum graphs are ideally suited to studying the spectral statistics of chaotic systems. Depending on the boundary conditions at the vertices, there are Neumann and Dirichlet graphs.
Junjie Lu   +3 more
doaj   +1 more source

Means of a Dirichlet process and multiple hypergeometric functions

open access: yes, 2004
The Lauricella theory of multiple hypergeometric functions is used to shed some light on certain distributional properties of the mean of a Dirichlet process. This approach leads to several results, which are illustrated here.
Antonio Lijoi   +2 more
core   +2 more sources

Modeling geo-homopholy in online social networks for population distribution projection [PDF]

open access: yesInternational Journal of Crowd Science, 2017
Purpose – Projecting the population distribution in geographical regions is important for many applications such as launching marketing campaigns or enhancing the public safety in certain densely populated areas.
Yuanxing Zhang   +5 more
doaj   +1 more source

Cruising The Simplex: Hamiltonian Monte Carlo and the Dirichlet Distribution

open access: yes, 2012
Due to its constrained support, the Dirichlet distribution is uniquely suited to many applications. The constraints that make it powerful, however, can also hinder practical implementations, particularly those utilizing Markov Chain Monte Carlo (MCMC ...
Betancourt, M. J.
core   +1 more source

Asymptotics for Constrained Dirichlet Distributions

open access: yesBayesian Analysis, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Geyer, Charles, Meeden, Glen
openaire   +3 more sources

Hyperspectral Unmixing with Endmember Variability using Partial Membership Latent Dirichlet Allocation

open access: yes, 2016
The application of Partial Membership Latent Dirichlet Allocation(PM-LDA) for hyperspectral endmember estimation and spectral unmixing is presented. PM-LDA provides a model for a hyperspectral image analysis that accounts for spectral variability and ...
Zare, Alina, Zou, Sheng
core   +1 more source

Clustering in Additive Mixed Models with Approximate Dirichlet Process Mixtures using the EM Algorithm [PDF]

open access: yes, 2013
We consider additive mixed models for longitudinal data with a nonlinear time trend. As random effects distribution an approximate Dirichlet process mixture is proposed that is based on the truncated version of the stick breaking presentation of the ...
Heinzl, Felix, Tutz, Gerhard
core   +2 more sources

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