Results 31 to 40 of about 10,005,809 (327)

Relationship between Aeolian tone and Wake Vortex from Inclined Flat Blade

open access: yesJournal of Fluid Science and Technology, 2009
The three dimensional structure of the wake vortex was investigated in relating to the aeolian tone from the inclined blade. It was pointed out that the aeolian tone is largest not at zero, but at ten degree of the inclined angle.
Sho YOSHITAKE   +3 more
doaj   +1 more source

Understanding the Factors and Consequences of Gas Deflagration Accident in Metro Shield Tunnel: Site Investigation and Numerical Analysis

open access: yesBuildings, 2023
This study aims to investigate the factors and consequences of gas deflagration accidents in metro shield tunnels based on on-site investigation and numerical analysis.
Yi Shen   +4 more
doaj   +1 more source

Labyrinthine acoustic metamaterials with triangular self-similarity for low-frequency sound insulation at deep subwavelength dimensions

open access: yesResults in Physics, 2023
Labyrinthine acoustic metamaterials are good choices for realizing sound insulation, acoustic stealth, and acoustic lenses by virtue of their stable performance and rich modes.
Ya-jun Xin   +8 more
doaj   +1 more source

Responses in large-scale structure [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2017
We introduce a rigorous definition of general power-spectrum responses as resummed vertices with two hard and $n$ soft momenta in cosmological perturbation theory. These responses measure the impact of long-wavelength perturbations on the local small-scale power spectrum.
Barreira, Alexandre, Schmidt, Fabian
openaire   +4 more sources

Modified Newtonian Dynamics of Large Scale Structure [PDF]

open access: yes, 2001
We examine the implications of Modified Newtonian Dynamics (MOND) on the large scale structure in a Friedmann-Robertson-Walker universe. We employ a ``Jeans swindle'' to write a MOND-type relationship between the fluctuations in the density and the ...
Nusser, Adi
core   +2 more sources

Ultra-low-frequency multi-broadband and vibration suppression mechanism of innovative star-shaped hybrid metamaterials

open access: yesMaterials & Design, 2023
Metamaterials with low-frequency band gap have always been the focus of research. For this reason, many researchers have proposed many structural design schemes. In this paper, an innovative star-shaped hybrid metamaterial structure is proposed. Based on
Hong-yun Yang   +10 more
doaj   +1 more source

Optimization of vibration characteristics and directional propagation of plane waves in branching ligament structures of wind models

open access: yesResults in Physics, 2023
To achieve multi-frequency vibration suppression and wave propagation modulation, eight branching ligament structures for wind models are proposed. Using lattice theory, dynamical model and finite element release method, the structures are verified to ...
Xiao-feng Li   +10 more
doaj   +1 more source

Large Scale Structure and Cosmic Rays revisited [PDF]

open access: yes, 2000
We investigate the possibility that ultra high energy cosmic rays (E > 10^19 eV) are related to the distribution of matter on large scales. The large scale structure (LSS) data stems from the recent IRAS PSCz redshift survey.
Teodoro, L., Ugoccioni, R., Wichoski, U.
core   +2 more sources

Semiclassical Gravity and Large-Scale Structure [PDF]

open access: yesAstroparticle Physics, 1995
Major changes, one figure added, several points clarified.
Bertoni, C.   +4 more
openaire   +2 more sources

Automated Identification, Warning, and Visualization of Vortex-Induced Vibration

open access: yesSensors
Vortex-induced vibration (VIV) is a kind of abnormal vibration which needs to be automatically identified and warned in real time to guarantee the operational safety of a bridge.
Min He   +4 more
doaj   +1 more source

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