Results 41 to 50 of about 646 (89)

On the dimension of orthogonal projections of self‐similar measures

open access: yesJournal of the London Mathematical Society, Volume 112, Issue 1, July 2025.
Abstract Let ν$\nu$ be a self‐similar measure on Rd$\mathbb {R}^d$, d⩾2$d\geqslant 2$, and let π$\pi$ be an orthogonal projection onto a k$k$‐dimensional subspace. We formulate a criterion on the action of the group generated by the orthogonal parts of the iterated function system on π$\pi$, and show that it ensures that the dimension of πν$\pi \nu$ is
Amir Algom, Pablo Shmerkin
wiley   +1 more source

A Review of Modeling and Control Techniques for Unmanned Aerial Vehicles

open access: yesEngineering Reports, Volume 7, Issue 6, June 2025.
By systematically classifying UAV modeling techniques and comparing control methods, this paper addresses a notable gap in the current literature. Furthermore, it highlights emerging trends and challenges in UAV control systems, providing valuable insights to guide future research toward enhancing the stability, efficiency, and adaptability of ...
Elisabeth Andarge Gedefaw   +2 more
wiley   +1 more source

Equation of spin motion in storage rings in a cylindrical coordinate system

open access: yes, 2006
The exact equation of spin motion in a cylindrical coordinate system with allowance for electric dipole moments of particles has been derived. This equation is convenient for analytical calculations of spin dynamics in circular storage rings when the ...
Silenko, Alexander J.
core   +2 more sources

A multi‐perspective fusion model for operating speed prediction on highways using knowledge‐enhanced graph neural networks

open access: yesComputer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 8, Page 1004-1027, 18 March 2025.
Abstract This study proposes a multi‐perspective fusion model for operating speed prediction based on knowledge‐enhanced graph neural networks, named RoadGNN‐S. By utilizing message passing and multi‐head self‐attention mechanisms, RoadGNN‐S can effectively capture the coupling impacts of multi‐perspective alignment elements (i.e., two‐dimensional ...
Jianqiang Gao   +4 more
wiley   +1 more source

Smarandache Curves Of Null Quaternionic Curves In Minkowski 3-space

open access: yesMANAS: Journal of Engineering, 2018
In this paper, we define Smarandache curves of null quaternionic curves in the semi ...
T. Kahraman
doaj  

Ship Formation Control Using Nonlinear Model Predictive Control With Safe Speed Constraints and Tidal Elevation Variations

open access: yesIET Intelligent Transport Systems, Volume 19, Issue 1, January/December 2025.
1. An adaptive speed control method is proposed to execute the ship formation trajectory tracking task more efficiently and safely while entering port with tidal elevation variations. 2. A distributed ship formation controller based on the leader‒follower structure is designed to govern the coordinated motion of formation members more flexibly. 3.
Fanglie Wu   +4 more
wiley   +1 more source

Every timelike geodesic in anti--de Sitter spacetime is a circle of the same radius

open access: yes, 2016
We refine and analytically prove an old proposition due to Calabi and Markus on the shape of timelike geodesics of anti--de Sitter space in the ambient flat space.
Golda, Zdzislaw A.   +1 more
core   +1 more source

Analytical considerations of the load‐deflection behavior in fibers during a filament winding process

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 24, Issue 4, December 2024.
Abstract Filament winding is a manufacturing process used in the construction of fiber composite structures, where a thermoset resin impregnated bunch of fibers is deposited on a rotating mandrel. The evolving stress and strain states due to thermal and mechanical loads during the manufacturing process are of particular interest to avoid subsequent ...
Christina Steinweller, Stefan Hartmann
wiley   +1 more source

On special curves in Lie groups with Myller configuration

open access: yesMathematical Methods in the Applied Sciences, Volume 47, Issue 14, Page 11693-11708, 30 September 2024.
In this study, we determine a new type comprehensive frame, which is called the generalized Frenet‐type frame in three‐dimensional Lie groups with Myller configurations, and it includes several special and classical type frames for Euclidean 3‐space and three‐dimensional Lie groups.
Zehra İşbilir   +2 more
wiley   +1 more source

Quaternionic Curves Which Lie on the Special Planes in 4−Dimensional Euclidean Space E4

open access: yesJournal of Mathematics, Volume 2024, Issue 1, 2024.
In this study, some curvature conditions of quaternionic curves are obtained by writing the position vectors of quaternionic curves as linear combinations of new vector fields, named as Di (1 ≤ i ≤ 4), that are produced from Frenet frame fields of the quaternionic curves.
İlim Kişi   +3 more
wiley   +1 more source

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