Results 31 to 40 of about 4,380,008 (160)

High‐speed railway track geometry robust maintenance with Bayesian deep learning‐enhanced physical‐informed neural networks

open access: yesComputer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 24, Page 3934-3952, 6 October 2025.
Abstract Millimeter‐level active control of track geometry irregularity (TGI) is crucial for intelligent maintenance of high‐speed railways. To address the efficiency limitations of existing time‐domain characteristics‐dominated TGI maintenance scheme design methods and vehicle–track coupled dynamics evaluation models, this paper proposes a new ...
Huakun Sun   +6 more
wiley   +1 more source

D’Alembert (1759)

open access: yes, 2020
Grand ordonnateur, aux côtés de Diderot, de L’Encyclopédie, dont il rédigea, à côté de nombreux articles, le « Discours préliminaire » (1751), Jean le Rond d’Alembert (1717-1783) a laissé une œuvre aussi vaste que diverse, couvrant plusieurs sciences, la
D’hulst, Lieven
core   +1 more source

Boundary-value problems for wave equations with data on the whole boundary

open access: yesElectronic Journal of Differential Equations, 2016
In this article we propose a new formulation of boundary-value problem for a one-dimensional wave equation in a rectangular domain in which boundary conditions are given on the whole boundary.
Makhmud A. Sadybekov   +1 more
doaj  

A Level Set Topology Optimization Theory Based on Hamilton's Principle

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 126, Issue 17, 15 September 2025.
ABSTRACT In this article, we propose a unified variational framework for deriving the evolution equation of the level set function in topology optimization, departing from conventional Hamilton–Jacobi‐based formulations. The key idea is the introduction of an auxiliary domain, geometrically identical to the physical design domain, occupied by ...
Jan Oellerich, Takayuki Yamada
wiley   +1 more source

Flow Memory Effect on Open‐Frame Remotely Operated Vehicle Motion

open access: yesJournal of Field Robotics, Volume 42, Issue 6, Page 2611-2638, September 2025.
ABSTRACT The flow memory effect is a kind of viscous force caused by acceleration between continuous phases and underwater vehicles and the development of the boundary layer near the interfacial surface. This paper establishes a 6‐degrees‐of‐freedom unsteady equation of motion describing the flow memory effect on viscous hydrodynamic loads.
Ruinan Guo   +5 more
wiley   +1 more source

On the Influence of the Fiber Curvature on the Stiffness of Long Fiber Reinforced Composites

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 126, Issue 15, 15 August 2025.
ABSTRACT The degree of curvature of fiber inclusions in fiber‐reinforced composites impacts the elastic properties of the composite, but numerical studies of this effect are limited by the lack of efficient microstructure generators with fiber curvature control. We propose an extension to the fused Sequential Addition and Migration algorithm (Int.
Celine Lauff   +3 more
wiley   +1 more source

Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect

open access: yesAdvanced Physics Research, Volume 4, Issue 7, July 2025.
This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò   +4 more
wiley   +1 more source

Nonlinearity and Domain Switching in a 3D‐Printed Architected Ferroelectric

open access: yesAdvanced Engineering Materials, Volume 27, Issue 10, May 2025.
By combining functional properties measurement with in situ 2D X‐ray microdiffraction experiments, it is shown that nonlinear polarization and strain responses of a 3D‐printed architected ferroelectric are driven by localized progression of domain switching, which depends on nonuniform electric‐field distribution as well as evolving stress fields.
Abhijit Pramanick   +7 more
wiley   +1 more source

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

open access: yesStudies 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   +2 more
wiley   +1 more source

Derivation of the Lorentz Transformations for Three‐Dimensional Relative Motion Between Inertial Frames of Reference

open access: yesAdvances in Mathematical Physics, Volume 2025, Issue 1, 2025.
Lorentz transformations are central to relativistic mechanics, explaining phenomena such as the mass–energy relationship, spatial contraction, momentum transformation, velocity addition, and the geometric structure of Minkowski space‐time. While traditionally derived for motion along a single spatial axis, these transformations can be generalized to ...
Chandra Bahadur Khadka   +1 more
wiley   +1 more source

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