Results 61 to 70 of about 8,599,368 (169)

Rethinking Collinearity in Self‐Organizing Maps: Evidence From Geophysical Data Classification

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract This study examines the impact of collinearity on unsupervised machine learning algorithms (UMLAs), specifically Self‐Organizing Maps (SOMs), for detecting lithological boundaries in geophysical data. Using a multi‐scale experimental framework that includes bivariate isotropic clusters, geologically complex Noddy simulations, and real‐world ...
Limin Xu, Leonardo Feltrin, Eleanor C. R. Green   +2 more
wiley   +1 more source

The second moment of sums of Hecke eigenvalues II

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract Let f$f$ be a holomorphic Hecke cusp form of weight k$k$ for SL2(Z)$\mathrm{SL}_2(\mathbb {Z})$, and let (λf(n))n⩾1$(\lambda _f(n))_{n\geqslant 1}$ denote its sequence of normalised Hecke eigenvalues. We compute the first and second moments of the sums S(x,f)=∑x⩽n⩽2xλf(n)$\mathcal {S}(x,f)=\sum _{x\leqslant n\leqslant 2x} \lambda _f(n)$, on ...
Ned Carmichael
wiley   +1 more source

Evolución del Sistema de Adquisición de Datos Aplicado a la Determinación de Propiedades Resistentes en Madera Estructural

Tecnología y Ciencia, 2018
Uno de los inconvenientes en la determinación experimental de propiedades mecánicas y elásticas de elementos estructurales es la medición simultánea de cargas y deformaciones en varios puntos. El instrumental utilizado habitualmente son celdas de carga y
Joel Oggero, Ezequiel Oggero, Nicolás Decleire   +2 more
doaj  

Some bounds related to the 2‐adic Littlewood conjecture

Mathematika, Volume 72, Issue 2, April 2026.
Abstract For every irrational real α$\alpha$, let M(α)=supn⩾1an(α)$M(\alpha) = \sup _{n\geqslant 1} a_n(\alpha)$ denote the largest partial quotient in its continued fraction expansion (or ∞$\infty$, if unbounded). The 2‐adic Littlewood conjecture (2LC) can be stated as follows: There exists no irrational α$\alpha$ such that M(2kα)$M(2^k \alpha)$ is ...
Dinis Vitorino, Ingrid Vukusic
wiley   +1 more source

Projeto Física do meio ambiente: “Energia” – Um relato de experiência

Revista Insignare Scientia
E Este relato de experiência foi desenvolvido a partir da aplicação de um projeto de ensino intitulado - Física do meio ambiente: “Energia”. Constituído de três módulos: Módulo 1 - Meio ambiente, sustentabilidade, poluição, energias (renováveis e não ...
Álison Pereira da Silva
doaj   +1 more source

Traces of Hecke operators on Drinfeld modular forms for GL2(Fq[T])$\operatorname{GL}_2(\mathbb {F}_q[T])$

Mathematika, Volume 72, Issue 2, April 2026.
Abstract In this paper, we study traces of Hecke operators on Drinfeld modular forms of level 1 in the case A=Fq[T]$A = \mathbb {F}_q[T]$. We deduce closed‐form expressions for traces of Hecke operators corresponding to primes of degree at most 2 and provide algorithms for primes of higher degree.
Sjoerd de Vries
wiley   +1 more source

COMPORTAMENTO DE VIGAS RETAS EM MLC COM EMENDAS DE TOPO E BISEL - PARTE II

Floresta e Ambiente, 2023
RESUMO O objetivo desta pesquisa foi construir e testar oito vigas com 5,4 metros de comprimento, usando laminas de madeira de pinus spp e Eucalyptus citriodora. Quatro delas foram feitas somente com madeira de pinus, e as demais com madeira de Pinus spp
Alexandre Miguel do Nascimento, Ricardo Marius Della Lucia, Fernando da Costa Baeta   +2 more
doaj  

Robust Control Design and Analysis Based on Lifting Linearization of Nonlinear Systems Under Uncertain Initial Conditions

International Journal of Robust and Nonlinear Control, Volume 36, Issue 5, Page 3047-3067, 25 March 2026.
ABSTRACT This paper presents a robust control synthesis and analysis framework for nonlinear systems with uncertain initial conditions. First, a deep learning‐based lifting approach is proposed to approximate nonlinear dynamical systems with linear parameter‐varying (LPV) state‐space models in higher‐dimensional spaces while simultaneously ...
Sourav Sinha, Mazen Farhood
wiley   +1 more source

Análisis de Flujo AC Aplicados a un Sistema Eléctrico de Potencia

Ingenio
En la actualidad, la carrera de Ingeniería Eléctrica en la Universidad Politécnica Salesiana, sede Guayaquil campus Centenario, se enfrenta a limitaciones de recursos para enseñar el análisis de corriente alterna en Sistemas Eléctricos de Potencia. Este
Alexander Emanuel Torres Romero, David Humberto Cárdenas Villacres, Raquel de los Angeles Salas Ibarra   +2 more
doaj   +1 more source

Evaluación de materiales en la zona de la sabana de Bogotá como medios filtrantes para aguas residuales

Revista Científica, 2011
El propósito de la investigación se centró tanto en la evaluación como en la comparación de materiales filtrantes convencionales y no convencionales en sistemas percoladores de aguas residuales. Para ello se realizaron ensayos, en un módulo experimental,
Helmut Espinosa García, Vilma Hernández Montaña, Nelly P. Lozano Puentes, Johana Tavera Tavera, Alexis Cervera Bonilla, Adriana Granja Rodríguez, Didier Yagüará   +6 more
doaj   +1 more source