Results 91 to 100 of about 2,726,393 (218)

Diffusion of Characteristic Gases in Oil‐Immersed Transformer by Computational Fluid Dynamics Simulation and Experimental Verification

open access: yesHigh Voltage, EarlyView.
ABSTRACT The complex diffusion of characteristic gases within oil‐immersed transformers significantly influences the timeliness between the fault occurrence and gas detection. So far, the gas transport processes and spatio‐temporal distributions remain inadequately understood.
Chunpeng Li   +7 more
wiley   +1 more source

Dynamical refinement against 3D‐ED data in Olex2–AutoChem using the N‐Beam approach

open access: yesJournal of Applied Crystallography, EarlyView.
Dynamical diffraction effects in electron diffraction can now be modelled directly within Olex2–AutoChem using data processed with CrysAlisPro, enabled by a new N‐Beam refinement method based on the Bloch‐wave formalism. This workflow allows dynamical refinement of integrated rotation electron diffraction intensities, improving structural models and ...
Oleg Dolomanov   +4 more
wiley   +1 more source

Bayesian inference for dynamic Q matrices and attribute trajectories in hidden Markov diagnostic classification models

open access: yesBritish Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Hidden Markov diagnostic classification models capture how students' cognitive attributes evolve over time. This paper introduces a Bayesian Markov chain Monte Carlo algorithm for diagnostic classification models that jointly estimates time‐varying Q matrices, latent attributes, item parameters, attribute class proportions and transition ...
Chen‐Wei Liu
wiley   +1 more source

On Hadamard Product of Square Roots of Correlation Matrices—Solution

open access: yes, 2003
On Hadamard product of square roots of correlation matrices ...
Liu, Shuangzhe
core   +1 more source

PSHead: 3D Head Reconstruction from a Single Image with Diffusion Prior and Self‐Enhancement

open access: yesComputer Graphics Forum, EarlyView.
We introduce PSHead, a coarse‐to‐fine framework guided by both object and face priors, to produce a Gaussian‐based 3D avatar for a single frontal‐view reference image. In the coarse stage, we create an initial 3D representation by applying diffusion models trained for general object generation, using Score Distillation Sampling losses over novel views.
Jing Yang   +4 more
wiley   +1 more source

Khatri-Rao Products for Operator Matrices Acting on the Direct Sum of Hilbert Spaces

open access: yesJournal of Mathematics, 2016
We introduce the notion of Khatri-Rao product for operator matrices acting on the direct sum of Hilbert spaces. This notion generalizes the tensor product and Hadamard product of operators and the Khatri-Rao product of matrices.
Arnon Ploymukda, Pattrawut Chansangiam
doaj   +1 more source

VisQI: A Visual Analysis Tool for the Debugging of Quantum Image Processing Algorithms

open access: yesComputer Graphics Forum, EarlyView.
We present VisQI, an interactive visualization framework that facilitates the analysis and debugging of quantum image processing (QIMP) algorithms using NEQR‐encoded images. VisQI allows users to inspect quantum operations on images step by step, providing a deeper understanding of image evolution.
A. Heim   +4 more
wiley   +1 more source

Extension and generalization inequalities involving the Khatri-Rao product of several positive matrices

open access: yesJournal of Inequalities and Applications, 2006
Recently, there have been many authors, who established a number of inequalities involving Khatri-Rao and Hadamard products of two positive matrices. In this paper, the results are established in the following three ways.
Al Zhour Zeyad Abdel Aziz, Kilicman Adem
doaj  

Trace inequalities for a block Hadamard product

open access: yes, 2018
In this paper, some inequalities for the trace and eigenvalues of a block Hadamard product of positive semidefinite matrices are investigated. In particular, a H?lder type inequality and inequalities related to norm and determinants of block ...
Saliha Pehlivan   +5 more
core   +1 more source

Multiple Chains Markov Switching Vector Autoregression

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT Both the U.S. stock and bond returns exhibit distinct Markovian regimes. However, because these regimes display limited coherence, conventional models typically require highly parameterized systems to adequately capture their joint distribution.
Leopoldo Catania
wiley   +1 more source

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