Results 21 to 30 of about 6,922,711 (307)

Finite element method-enhanced neural network for forward and inverse problems

open access: yesAdvanced Modeling and Simulation in Engineering Sciences, 2023
We introduce a novel hybrid methodology that combines classical finite element methods (FEM) with neural networks to create a well-performing and generalizable surrogate model for forward and inverse problems. The residual from finite element methods and
Rishith E. Meethal   +6 more
doaj   +1 more source

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

Brazilian Congress structural balance analysis [PDF]

open access: yes, 2016
In this work, we study the behavior of Brazilian politicians and political parties with the help of clustering algorithms for signed social networks. For this purpose, we extract and analyze a collection of signed networks representing voting sessions of
Frota, Yuri, Levorato, Mario
core   +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

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

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

Damage Sensitive Signals for the Assessment of the Conditions of Wind Turbine Rotor Blades Using Electromagnetic Waves

open access: yesInfrastructures, 2022
One of the most important renewable energy technologies used nowadays are wind power turbines. In this paper, we are interested in identifying the operating status of wind turbines, especially rotor blades, by means of multiphysical models. It is a state-
Zainab Riyadh Shaker Al-Yasiri   +3 more
doaj   +1 more source

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

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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