Results 11 to 20 of about 6,838,103 (298)

Research on Low-Frequency Noise Control Based on Fractal Coiled Acoustic Metamaterials

open access: yesShock and Vibration, 2022
In this paper, a self-similar fractal coiled acoustic metamaterial is designed for the low-frequency noise control problem by combining a perforated plate and a coiled back cavity structure.
Hongyu Cui, Chengtao Liu, Haoming Hu
doaj   +1 more source

Structural analysis of a scissor structure

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2020
This paper presents equilibrium mechanics and a finite element model for analysing a scissor structure that contains pivots with zero bending stiffness representing structural instability. The pivot at the centre of each structural unit, which is a feature of scissor structures, can be used to transfer the displacement between the units.
Ario, I.   +6 more
openaire   +3 more sources

Fatigue Strength of AH36 Thermal Cut Steel Edges at Sub-Zero Temperatures

open access: yesJournal of Marine Science and Engineering, 2023
Cruise ships or yachts that operate in areas with seasonal freezing temperatures have large openings in the outer shell. Those are thermal cut edges, and they are exposed to very low temperatures.
Marten Beiler   +4 more
doaj   +1 more source

Copula Structure Analysis

open access: yesJournal of the Royal Statistical Society Series B: Statistical Methodology, 2009
SummaryWe extend the standard approach of correlation structure analysis for dimension reduction of high dimensional statistical data. The classical assumption of a linear model for the distribution of a random vector is replaced by the weaker assumption of a model for the copula.
Klüppelberg, Claudia, Kuhn, Gabriel
openaire   +3 more sources

The Firefighter Problem: A Structural Analysis [PDF]

open access: yes, 2014
We consider the complexity of the firefighter problem where b>=1 firefighters are available at each time step. This problem is proved NP-complete even on trees of degree at most three and budget one (Finbow et al.,2007) and on trees of bounded degree b+3
A King   +16 more
core   +3 more sources

Structural Analysis of a Dragonfly Wing [PDF]

open access: yes, 2010
Dragonfly wings are highly corrugated, which increases the stiffness and strength of the wing significantly, and results in a lightweight structure with good aerodynamic performance.
Jongerius, S.R., Lentink, D.
core   +2 more sources

Correlation between sonic pulse velocity and flat-jack tests for the estimation of the elastic properties of unreinforced brick masonry: Case studies from Croatia

open access: yesCase Studies in Construction Materials, 2023
Historic urban cores in southern Europe are characterized by a significant number of existing unreinforced masonry structures that are known for their seismic vulnerability.
Javier Ortega   +6 more
doaj   +1 more source

On the study of the dynamic response in 3D additively manufactured auxetic structures [PDF]

open access: yesEPJ Web of Conferences, 2021
The main aim of this work is to analyse the quasi-static and the dynamic response and deformation behaviour of polymeric auxetic structures manufactured with an SLA (stereolitography) additive manufacturing technique.
Fjeldberg Niklas   +3 more
doaj   +1 more source

Structural reliability analysis of laminated CMC components [PDF]

open access: yes, 1991
For laminated ceramic matrix composite (CMC) materials to realize their full potential in aerospace applications, design methods and protocols are a necessity.
Duffy, Stephen F.   +2 more
core   +2 more sources

Structural patterns in complex networks through spectral analysis [PDF]

open access: yes, 2010
The study of some structural properties of networks is introduced from a graph spectral perspective. First, subgraph centrality of nodes is defined and used to classify essential proteins in a proteomic map.
Estrada, Ernesto
core   +1 more source

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