Random walk in random environment with asymptotically zero perturbation [PDF]
, 2006 We give criteria for ergodicity, transience and null recurrence for the random walk in random environment on \Z+={0,1,2,…}, with reflection at the origin, where the random environment is subject to a vanishing perturbation.
Menshikov, MV +5 more
core +2 more sources
Computing the Cramer-Rao bound of Markov random field parameters: Application to the Ising and the Potts models [PDF]
, 2013 This letter considers the problem of computing the Cramer–Rao bound for the parameters of a Markov random field. Computation of the exact bound is not feasible for most fields of interest because their likelihoods are intractable and have intractable ...
Batatia, Hadj +8 more
core +1 more source
Logarithmic speeds for one-dimensional perturbed random walk in random environment [PDF]
, 2007 We study the random walk in random environment on Z+ = f0; 1; 2; : : :g, where the environment is subject to a vanishing (random) perturbation. The two particular cases that we consider are: (i) random walk in random environment perturbed from Sinai's ...
Menshikov, MV +7 more
core +2 more sources
Non-homogeneous random walks with non-integrable increments and heavy-tailed random walks on strips [PDF]
, 2012 We study asymptotic properties of spatially non-homogeneous random walks with non-integrable increments, including transience, almost-sure bounds, and existence and non existence of moments for first-passage and last-exit times.
MacPhee, Iain M. +9 more
core +2 more sources
Quenched invariance principles for random walks and elliptic diffusions in random media with boundary [PDF]
, 2014 Via a Dirichlet form extension theorem and making full use of two-sided heat kernel estimates, we establish quenched invariance principles for random walks in random environments with a boundary.
Croydon, David A. +5 more
core +1 more source
High-Order Markov Random Fields and Their Applications in Cross-Language Speech Recognition
Cybernetics and Information Technologies, 2015 In this paper we study the cross-language speech emotion recognition using high-order Markov random fields, especially the application in Vietnamese speech emotion recognition.
Zhipeng Jiang, Chengwei Huang
doaj +1 more source
Comparison of linear discriminant functions in image classification
Lietuvos Matematikos Rinkinys, 2010 In statistical image classification it is usually assumed that feature observations given labels are independently distributed. We have retracted this assumption by proposing stationary Gaussian random field (GRF) model for features observations ...
Lijana Stabingienė +2 more
doaj +1 more source
Markov random fields and iterated toric fibre products [PDF]
, 2018 We prove that iterated toric fibre products from a finite collection of toric varieties are defined by binomials of uniformly bounded degree. This implies that Markov random fields built up from a finite collection of finite graphs have uniformly bounded
Florian M. Oosterhof +7 more
core +1 more source
Gaussian mixture model and Markov random fields for hyperspectral image classification
European Journal of Remote Sensing, 2018 This paper presents a novel method for reliable and efficient spatial-spectral classification of hyperspectral data. This algorithm is based on the Bayesian labelling by combining the results of the Gaussian mixture model (GMM) with spatial-contextual ...
Hamid Ghanbari +3 more
doaj +1 more source
Identifying protein complexes directly from high-throughput TAP data with Markov random fields
BMC Bioinformatics, 2007 Background Predicting protein complexes from experimental data remains a challenge due to limited resolution and stochastic errors of high-throughput methods. Current algorithms to reconstruct the complexes typically rely on a two-step process.
Krause Roland +3 more
doaj +1 more source