Results 21 to 30 of about 1,854 (111)

Aplicação da Programação Geométrica na Gestão de Qualidade da Água

Intermaths
A Programação Geométrica é uma técnica usada para resolver problemas algébricos de otimização não linear. Problemas de Programação Geométrica não são convexos em sua forma padrão, mas admitem uma reformulação convexa equivalente a partir de uma mudança ...
Pedro Henrique Amorim Alves, Rúbia Mara de Oliveira Santos   +1 more
doaj   +3 more sources

The role of the curvature of a surface in the shape of the solutions to elliptic equations

Proceedings of the London Mathematical Society, Volume 133, Issue 1, July 2026.
Abstract We prove the uniqueness and nondegeneracy of the critical point of positive, semistable solutions of −Δu=f(u)$-\Delta u=f(u)$ with Dirichlet boundary conditions for a class of star‐shaped domains on the sphere and in the hyperbolic plane satisfying a geometric condition.
Francesca Gladiali, Massimo Grossi, Luigi Provenzano   +2 more
wiley   +1 more source

A strong quantitative form of the fractional isoperimetric inequality

Journal of the London Mathematical Society, Volume 113, Issue 6, June 2026.
Abstract We show a strong version of the fractional quantitative isoperimetric inequality, in which the isoperimetric deficit controls not only the Fraenkel asymmetry but also a sort of oscillation of the boundary. This generalizes the local result by Fusco and Julin in [22].
Eleonora Cinti, Enzo Maria Merlino, Berardo Ruffini   +2 more
wiley   +1 more source

Arithmetic and geometric means

Vetor, 2008
Neste artigo fazemos uma nova demonstração da desigualdade entre as médias aritméticas e geométricas. Esta demonstração unifica o argumento no correr dos n números cuja média estamos calculando, usando a mesma desigualdade em todos os casos.
José Stálio Rodrigues dos Santos, Tarcisio Praciano Pereira   +1 more
doaj   +4 more sources

Expelled by the Antarctic ice: Evolutionary history of the tribe Cunonieae (Cunoniaceae)

Journal of Systematics and Evolution, Volume 63, Issue 6, Page 1441-1457, November 2025.
Fossil calibration reveals recent radiations and biogeographical history of the Cunonieae tribe. The most densely sampled phylogeny indicated Antarctica and Patagonia as areas of origin, confirming the reestablishment of Pterophylla and revealing the northward movement of Weinmannia into the tropical Andes.
Francisco Fajardo‐Gutiérrez, Mariasole Calbi, Markus S. Dillenberger, Sebastian Tello, Alfredo Fuentes, Nora H. Oleas, Ricardo A. Segovia, Christine E. Edwards, Yohan Pillon, James E. Richardson, Thomas Borsch   +10 more
wiley   +1 more source

Hipérbole, inversão geométrica e um problema de construção de triângulo

REMAT
A inversão geométrica é uma importante transformação que permite converter problemas aparentemente complicados em problemas análogos, mas com soluções mais simples.
Dulce Mary Almeida, Júlio César Costa
doaj   +1 more source

Análise não linear geométrica de treliças planas de madeira a partir do método dos elementos finitos posicional

Revista Principia, 2021
Neste trabalho apresenta-se uma metodologia para análise não linear geométrica de sistemas treliçados planos de madeira, a partir de uma formulação posicional do método dos elementos finitos. Dois modelos de treliça são analisados e madeiras folhosas com
Thiago Damasceno Silva, André Luis Christoforo, Tarniê Vilela Nunes Narques, Julia Naves Teixeira, Francisco Antonio Rocco Lahr   +4 more
doaj   +1 more source

A PCA and Mesh Adaptation‐Based Format for High Compression of Earth Observation Optical Data With Applications in Agriculture

International Journal for Numerical Methods in Engineering, Volume 126, Issue 12, 30 June 2025.
ABSTRACT Earth Observation optical data are critical for agriculture, supporting tasks like vegetation health monitoring, crop classification, and land use analysis. However, the large size of multispectral and hyperspectral datasets poses challenges for storage, transmission, and processing, particularly in precision farming and resource‐limited ...
Luca Liverotti, Nicola Ferro, Matteo Matteucci, Simona Perotto   +3 more
wiley   +1 more source

Mechanical Hamiltonization of Unreduced ϕ$\phi$‐Simple Chaplygin Systems

Studies in Applied Mathematics, Volume 154, Issue 5, May 2025.
ABSTRACT In this paper, we prove that the trajectories of unreduced ϕ$\phi$‐simple Chaplygin kinetic systems are reparameterizations of horizontal geodesics with respect to a modified Riemannian metric. Furthermore, our proof is constructive and these Riemannian metrics, which are not unique, are obtained explicitly in interesting examples.
Alexandre Anahory Simoes, Juan Carlos Marrero, David Martín de Diego   +2 more
wiley   +1 more source

Commodity risk assessment of Alnus cordata and Alnus glutinosa specimen trees from the UK

EFSA Journal, Volume 23, Issue 4, April 2025.
Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘high risk plants, plant products and other objects’. This Scientific Opinion covers the plant health risks posed by the following commodities: Alnus cordata and
EFSA Panel on Plant Health (PLH), Antonio Vicent Civera, Paula Baptista, Anna Berlin, Elisavet Chatzivassiliou, Jaime Cubero, Nik Cunniffe, Eduardo de la Peña, Nicolas Desneux, Francesco Di Serio, Anna Filipiak, Paolo Gonthier, Beata Hasiów‐Jaroszewska, Hervé Jactel, Blanca B. Landa, Lara Maistrello, David Makowski, Panagiotis Milonas, Nikos T. Papadopoulos, Hanna Susi, Dirk Jan van der Gaag, Jane Debode, Charles Manceau, Christer Sven Magnusson, Juan A. Navas‐Cortes, Christos Kritikos, Maria Kormpi, Dimitrios Papachristos, Chrysavgi Reppa, Olaf Mosbach Schulz, Ciro Gardi, Monia Federica Lombardo, Antigoni Akrivou, Spyridon Antonatos, Despoina Beris, Roel Potting   +35 more
wiley   +1 more source