Results 71 to 80 of about 2,483 (203)

Establishing Shape Correspondences: A Survey

Computer Graphics Forum, EarlyView.
Abstract Shape correspondence between surfaces in 3D is a central problem in geometry processing, concerned with establishing meaningful relations between surfaces. While all correspondence problems share this goal, specific formulations can differ significantly: Downstream applications require certain properties that correspondences must satisfy ...
A. Heuschling, H. Meinhold, L. Kobbelt
wiley   +1 more source

Optimizing Hydraulic Performance of a Jet Centrifugal Pump: A Hybrid Approach Combining Continuous Adjoint Method and Machine Learning

Applied Sciences
Jet centrifugal pumps frequently suffer from low energy conversion efficiency due to severe fluid mixing and inter-stage interference. To address this, a structural optimization framework combining the continuous adjoint method and machine learning is ...
Weibin Mao, Jie Ge, Tao Sun, Chengzhang Wang, Anbang Zheng, Mengdi Ye, Xuelong Yang   +6 more
doaj   +1 more source

A continuous adjoint method for the shape optimization of turbulent cavitating flows

Meccanica
Abstract The onset of cavitation in hydraulic devices is caused by rapid pressure variations leading to the formation and collapse of vapor bubbles which can occasionally provoke severe damage. Shape optimizations for cavitation reduction, based on single-phase flow models, prevent static pressure from dropping below the vaporization ...
Libretti, Francesco, STALIKAS, SPYRIDON, Asouti, Varvara, Trompoukis, Xenofon, Giannakoglou, Kyriakos   +4 more
openaire   +2 more sources

Optimal Portfolio Choice With Cross‐Impact Propagators

Mathematical Finance, EarlyView.
ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber, Eyal Neuman, Sturmius Tuschmann   +2 more
wiley   +1 more source

Frequency‐dependent contraction rates for the Bayesian method to the inverse source problem

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract This paper addresses an inverse source problem for acoustic waves in a range of frequencies. Our study has two main goals. First, although the problem is severely ill‐posed with a logarithmic stability estimate, we demonstrate, through careful analysis of the forward map's singular values, that increasing the frequency range enhances stability,
Pu‐Zhao Kow, Jenn‐Nan Wang
wiley   +1 more source

Level-Set Based Topology Optimization Using The Continuous Adjoint Method

, 2017
In this paper, the development and application of the continuous adjoint of the incompressible Navier-Stokes coupled with the level-set method applied to topology optimization, is presented. The main focus of the paper is the representation and the evolution of the surface (interface between solid and fluid) via the level-set method.
Karpouzas, G.K.,, De Villiers, E.,
openaire   +2 more sources

Stochastic Gradient Descent in High Dimensions for Multi‐Spiked Tensor PCA

Communications on Pure and Applied Mathematics, Volume 79, Issue 10, Page 2291-2369, October 2026.
ABSTRACT We study the high‐dimensional dynamics of online stochastic gradient descent (SGD) for the multi‐spiked tensor model. This multi‐index model arises from the tensor principal component analysis (PCA) problem with multiple spikes, where the goal is to estimate the unknown signal vectors within the N$N$‐dimensional unit sphere through maximum ...
Gérard Ben Arous, Cédric Gerbelot, Vanessa Piccolo   +2 more
wiley   +1 more source

Implementation and evaluation of an array of chemical solvers in the Global Chemical Transport Model GEOS-Chem [PDF]

Geoscientific Model Development, 2009
This paper discusses the implementation and performance of an array of gas-phase chemistry solvers for the state-of-the-science GEOS-Chem global chemical transport model. The implementation is based on the Kinetic PreProcessor (KPP).
P. Eller, K. Singh, A. Sandu, K. Bowman, D. K. Henze, M. Lee   +5 more
doaj  

BART Streams: Real‐Time Reconstruction Using a Modular Framework for Pipeline Processing

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1534-1544, October 2026.
ABSTRACT Purpose To create modular solutions for interactive real‐time MRI using reconstruction algorithms implemented in BART. Methods A new protocol for streaming of multidimensional arrays is presented and integrated into BART. The new functionality is demonstrated using examples for cardiac interactive real‐time MRI based on radial FLASH, where ...
Philip Schaten, Moritz Blumenthal, Bernhard Rapp, Christina Unterberg‐Buchwald, Martin Uecker   +4 more
wiley   +1 more source

Localization sequences for logarithmic topological cyclic homology

Journal of Topology, Volume 19, Issue 3, September 2026.
Abstract We introduce the notion of an Ek$\mathbb {E}_k$‐ring with prelogarithmic structure, define logarithmic topological Hochschild homology and logarithmic topological cyclic homology in this context, and establish localization sequences for these theories. Our approach is based on Thom R$R$‐algebras.
John Rognes, Steffen Sagave, Christian Schlichtkrull   +2 more
wiley   +1 more source