Results 11 to 20 of about 6,791,323 (278)

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

Protein-RNA interactions: a structural analysis [PDF]

open access: yes, 2001
A detailed computational analysis of 32 protein-RNA complexes is presented. A number of physical and chemical properties of the intermolecular interfaces are calculated and compared with those observed in protein-double-stranded DNA and protein-single ...
Berman, HM   +4 more
core   +2 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

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

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

Development of a comprehensive database of scattering environmental conditions and simulation constraints for offshore wind turbines [PDF]

open access: yesWind Energy Science, 2017
For the design and optimisation of offshore wind turbines, the knowledge of realistic environmental conditions and utilisation of well-founded simulation constraints is very important, as both influence the structural behaviour and power output in ...
C. Hübler, C. G. Gebhardt, R. Rolfes
doaj   +1 more source

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