Results 41 to 50 of about 8,079,144 (302)

Quadratic Discriminant Analysis of Spatially Correlated Data

open access: yesNonlinear Analysis, 2001
The problem of classification of the realisation of the stationary univariate Gaussian random field into one of two populations with different means and different factorised covariance matrices is considered. In such a case optimal classification rule in
K. Dučinskas, J. Šaltytė
doaj   +1 more source

Generalized spinning particles on $${\mathcal {S}}^2$$ S 2 in accord with the Bianchi classification

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
Motivated by recent studies of superconformal mechanics extended by spin degrees of freedom, we construct minimally superintegrable models of generalized spinning particles on $${\mathcal {S}}^2$$ S 2 , the internal degrees of freedom of which are ...
Anton Galajinsky
doaj   +1 more source

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

Quadratic Morse-Smale Vector Fields which are not Structurally Stable [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
An example is given of a quadratic system in the plane which is Morse-Smale but not structurally stable. Also, it is proved that no such example exists for a quadratic system which is a gradient.
Chicone, Carmen, Shafer, Douglas S.
openaire   +1 more source

Parameter Constraints and Real Structures in Quadratic Semicomplete Vector Fields on C3

open access: yesInternational Journal of Mathematics and Mathematical Sciences
It is a remarkable fact that among the known examples of quadratic semicomplete vector fields on C3, it is always possible to find linear coordinates where the corresponding vector field has all—or “almost all”—coefficients in the real numbers.
Daniel de la Rosa Gómez
doaj   +1 more source

An Extended Newmark-FDTD Method for Complex Dispersive Media

open access: yesInternational Journal of Antennas and Propagation, 2018
Based on polarizability in the form of a complex quadratic rational function, a novel finite-difference time-domain (FDTD) approach combined with the Newmark algorithm is presented for dealing with a complex dispersive medium.
Yu-Qiang Zhang, Peng-Ju Yang
doaj   +1 more source

Notes on a surface defect in the O(N) model

open access: yesJournal of High Energy Physics, 2023
We study a surface defect in the free and critical O(N) vector models, defined by adding a quadratic perturbation localized on a two-dimensional subspace of the d-dimensional CFT.
Simone Giombi, Bowei Liu
doaj   +1 more source

Interior Point Methods for Massive Support Vector Machines [PDF]

open access: yes, 2000
We investigate the use of interior point methods for solving quadratic programming problems with a small number of linear constraints where the quadratic term consists of a low-rank update to a positive semi-de nite matrix. Several formulations of the
Ferris, Michael, Munson, Todd
core  

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

open access: yesAdvanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič   +7 more
wiley   +1 more source

Cross-Validation, Support Vector Machines and Slice Models [PDF]

open access: yes, 2001
We show how to implement the cross-validation technique used in ma- chine learning as a slice model. We describe the formulation in terms of support vector machines and extend the GAMS/DEA interface to allow for e cient solu- tions of linear, mixed ...
Ferris, Michael, Voelker, Meta
core  

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