Results 21 to 30 of about 77,241 (265)

Commuting normal operators and joint numerical range

open access: yes, 2021
Let ${\mathcal H}$ be a complex Hilbert space and let ${\mathcal B}({\mathcal H})$ be the algebra of all bounded linear operators on ${\mathcal H}$. For a positive integer $k$ less than the dimension of ${\mathcal H}$ and ${\mathbf A} = (A_1, \dots, A_m)\in {\mathcal B}({\mathcal H})^m$, the joint $k$-numerical range $W_k({\mathbf A})$ is the set of $(
Chan, Jor-Ting   +2 more
openaire   +2 more sources

Mechanical and failure characteristics of rock-like material with multiple crossed joint sets under uniaxial compression

open access: yesAdvances in Mechanical Engineering, 2017
The strength and deformation of rock masses transected by persistent joints are controlled by the fracture network. In this work, bonded particle model modeled by particle flow code in three dimensions was used to study the effect of geometry parameters ...
Jiaming Liu   +4 more
doaj   +1 more source

Adjustable Compliance Joint with Torsion Spring for Human Centred Robots

open access: yesInternational Journal of Advanced Robotic Systems, 2015
Human-oriented robots should be human-friendly, safe and impact-free. The present work is about the problem of adjustable compliance implementation in human-friendly robots.
Dimitar Chakarov   +3 more
doaj   +1 more source

Joint numerical ranges, quantum maps, and joint numerical shadows

open access: yesLinear Algebra and its Applications, 2013
12 latex pages, 3 figures in eps, revised version, several ...
Gutkin, Eugene, Życzkowski, Karol
openaire   +4 more sources

The influence of temperature on wave scattering of damaged segments within composite structures

open access: yesMATEC Web of Conferences, 2018
The increased use of composite materials in modern aerospace and automotive structures, and the broad range of launch vehicles’ operating temperature imply a great temperature range for which the structures has to be frequently and thoroughly inspected ...
Apalowo Rilwan Kayode   +2 more
doaj   +1 more source

The joint $k$-numerical range of operators

open access: yes, 2021
Let ${\mathcal B}({\mathcal H})$ be the algebra of all bounded linear operators on the Hilbert space ${\mathcal H}$. For a positive integer $k$ less than the dimension of ${\mathcal H}$ and ${\mathbf A} = (A_1, \dots, A_m)\in {\mathcal B}({\mathcal H})^m$, the joint $k$-numerical range $W_k({\mathbf A})$ is the set of vector $(α_1, \dots, α_m) \in ...
Chan, Jor-Ting   +2 more
openaire   +2 more sources

Nonlinear Torsional Vibration Dynamics Behaviors of Rolling Mill’s Multi-DOF Main Drive System under Parametric Excitation

open access: yesJournal of Applied Mathematics, 2014
Considering the influence caused by joint angle, nonlinear damping, and nonlinear rigidity, the nonlinear torsional vibration dynamical modeling of the multi-DOF rolling mill’s main drive system is established.
Dongying Han, Peiming Shi, Kewei Xia
doaj   +1 more source

Numerical simulation of fluid‐solid coupling of fractured rock mass considering changes in fracture stiffness

open access: yesEnergy Science & Engineering, 2020
The fluid‐solid coupling simulation of fractured coal and rock is helpful to study the influence of the fracture structure on the stress sensitivity of the permeability.
Yuandong Qiao   +3 more
doaj   +1 more source

The Stokes problem for an elliptic contour

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2023
The paper considers the problem on small harmonic oscillations of an elliptical contour immersed in the incompressible viscous fluid. Analytical and asymptotic methods for solving this problem have been proposed.
Afanasov Evgeny   +2 more
doaj   +1 more source

Numerical elastoplastic analysis of the shear stress distribution in the adhesive layer for single-lap joints

open access: yesScience and Engineering of Composite Materials, 2014
The purpose of this paper was to investigate the stress distribution of adhesive single-lap joint loaded in the elastic and elastoplastic range. The stress variation across the adhesive length was achieved both analytically and numerically.
Pekbey Yeliz
doaj   +1 more source

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