Results 21 to 30 of about 145,078 (261)

Equilibrium of longitudinal bunch distributions in electron storage rings with arbitrary impedance sources and generic filling patterns

open access: yesPhysical Review Accelerators and Beams, 2023
A new self-consistent semianalytical method for calculating the stationary beam-induced voltage in the presence of arbitrary filling patterns and impedance sources in electron storage rings is presented.
Murilo B. Alves, Fernando H. de Sá
doaj   +1 more source

Analysis of the vibration characteristics of tail beam of the hydraulic support under random coal gangue particle slip conditions

open access: yesPLoS ONE, 2022
To study the influence of the gangue content of coal gangue particles on the vibration signal of the tail beam under sliding condition, this paper combines three-dimensional(3D) laser scanning technology with the finite element method, establishes a ...
Lirong Wan   +5 more
doaj   +2 more sources

saturated poroelastic halfspace, beam, bending consolidation, time-domain

open access: yesYantu gongcheng xuebao, 2017
The coal permeability is the key parameter for the gas seepage characteristics and the migration law, and the structural anisotropy of the coal seam makes the permeability have obvious orientation dependence.
QI Xian-yin 1,2, WANG Wei 1,2
doaj   +1 more source

Elastic immersive wave experimentation: Theory and physical implementation

open access: yesPhysical Review Research, 2019
We present a proof of concept of elastic immersive wave experimentation. A physical experiment of finite volume is connected with a numerical domain via the novel theory of immersive boundary conditions.
Henrik R. Thomsen   +4 more
doaj   +1 more source

Cascaded domain engineering optical phased array for 2D beam steering

open access: yesNanophotonics, 2023
The current approach to 2D optical phased array (OPA) encounters challenges, such as the requirement for a highly tunable laser that is incompatible with certain 2D beam-steering applications or significant power consumption, large antenna spacing and ...
Li Jingwei   +5 more
doaj   +1 more source

Vibration of a Laminated Beam with a Delamination Including Contact Effects

open access: yesShock and Vibration, 2004
Certain results are presented in this paper on damped vibration of a laminated cantilever beam with a single closing delamination. In order to investigate this task the finite element method has been applied in the current study.
W. Ostachowicz, A. Żak
doaj   +1 more source

Time domain green functions for the homogeneous Timoshenko beam [PDF]

open access: yesThe Quarterly Journal of Mechanics and Applied Mathematics, 1998
Summary: In this paper a wave splitting technique is applied to a homogeneous Timoshenko beam. The purpose is to obtain a diagonal equation in terms of the split fields. These fields are calculated in the time domain from an appropriate set of boundary conditions.
Folkow, Peter D.   +2 more
openaire   +2 more sources

Coherent amplitude modulation of electron-beam-driven Langmuir waves [PDF]

open access: yesAnnales Geophysicae, 2013
A linear approach to the phenomenon of irregular amplitude modulation of beam-driven Langmuir waves, developed in a previous paper, is extended to explain periodic modulation as well.
K. Baumgärtel
doaj   +1 more source

DIMENSIONAL REDUCTION FOR THE BEAM IN ELASTICITY ON AN UNBOUNDED DOMAIN

open access: yesMathematical Models and Methods in Applied Sciences, 1999
The dimensional reduction method is investigated for solving boundary value problems of the beam in elasticity on domain Ωd:=ℝ×(-d,d) by replacing the problems with systems of equations in ℝ. The basic tool to analyze the dimensional reduction technique for problems in an unbounded domain Ωd is using of Fourier transformation.
openaire   +2 more sources

Across-Beam Signal Integration Approach with Ubiquitous Digital Array Radar for High-Speed Target Detection

open access: yesRemote Sensing
Ubiquitous digital array radar (UDAR) extends the integration time of moving targets by deploying a wide transmitting beam and multiple narrow receiving beams to cover the entire observed airspace.
Le Wang   +6 more
doaj   +1 more source

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