Results 11 to 20 of about 30,440 (315)

Naked Singularities in the Einstein-Euler System

open access: yesAnnals of PDE, 2023
AbstractIn 1990, based on numerical and formal asymptotic analysis, Ori and Piran predicted the existence of selfsimilar spacetimes, called relativistic Larson-Penston solutions, that can be suitably flattened to obtain examples of spacetimes that dynamically form naked singularities from smooth initial data, and solve the radially symmetric Einstein ...
Guo, Yan, Hadzic, Mahir, Jang, Juhi
openaire   +4 more sources

Feedback linearization of discrete-time nonlinear control systems: computational aspects [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2020
An alternative solution of the static state feedback linearization problem for the discrete-time case is given. This solution is based on the sequence of distributions, whose computation requires only the knowledge of the backward shift equations.
Tanel Mullari, Ülle Kotta
doaj   +1 more source

A Decoupling Method for Successive Robot Rotation Based on Time Domain Instantaneous Euler Angle

open access: yesMathematics, 2023
In the present study, a novel time domain decoupling method was proposed for the multiple successive rotations of different kinds of robots. This is achieved through the utilization of instantaneous Euler angles.
Xin Zhou, Jianxu Zhu
doaj   +1 more source

Nonlocal constants of motion in Lagrangian Dynamics of any order

open access: yesPartial Differential Equations in Applied Mathematics, 2022
We describe a recipe to generate “nonlocal” constants of motion for ODE Lagrangian systems. As a sample application, we recall a nonlocal constant of motion for dissipative mechanical systems, from which we can deduce global existence and estimates of ...
Gianluca Gorni   +2 more
doaj   +1 more source

A Survey of Euler Diagrams [PDF]

open access: yes, 2014
Euler diagrams visually represent containment, inpresstersection and exclusion using closed curves. They first appeared several hundred years ago, however, there has been a resurgence in Euler diagram research in the twenty-first century.
Rodgers, Peter
core   +1 more source

Connecting Euler and Lagrange systems as nonlocally related systems of dynamical nonlinear elasticity

open access: yesArchives of Mechanics, 2011
Nonlocally related systems for the Euler and Lagrange systems of two-dimensional dynamical nonlinear elasticity are constructed. Using the continuity equation, i.e., conservation of mass of the Euler system to represent the density and Eulerian velocity ...
G. Bluman, J.F. Ganghoffer
doaj   +1 more source

Quantization-Mitigation-Based Trajectory Control for Euler-Lagrange Systems with Unknown Actuator Dynamics

open access: yesSensors, 2020
In this paper, we investigate a trajectory control problem for Euler-Lagrange systems with unknown quantization on the actuator channel. To address such a challenge, we proposed a quantization-mitigation-based trajectory control method, wherein adaptive ...
Yi Lyu, Qiyu Yang, Patrik Kolaric
doaj   +1 more source

Landau levels of the Euler class topology

open access: yesPhysical Review Research, 2022
Two-dimensional systems with C_{2}T (PT) symmetry exhibit the Euler class topology E∈Z in each two-band subspace realizing a fragile topology beyond the symmetry indicators.
Yifei Guan   +2 more
doaj   +1 more source

Properties of Euler Diagrams [PDF]

open access: yes, 2007
Euler diagrams have numerous application areas, with a large variety of languages based on them. In relation to software engineering, such areas encompass modelling and specification including from a formal perspective. In all of these application areas,
Howse, John   +3 more
core   +1 more source

Generating Euler Diagrams from Existing Layouts [PDF]

open access: yes, 2008
Euler diagrams have a wide variety of uses, from information visualization to logical reasoning. In all of their application areas, the ability to automatically layout Euler diagrams brings considerable benefits.
Howse, John   +7 more
core   +1 more source

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