Results 31 to 40 of about 126,578 (268)

Algorithms for Solving Ordinary Differential Equations Based on Orthogonal Polynomial Neural Networks

open access: yesAlgorithms
This article proposes single-layer neural network algorithms for solving second-order ordinary differential equations, based on the principles of functional connection.
Roman Parovik
doaj   +1 more source

Quality Assessment and Practical Interpretation of the Wave Parameters Estimated by HF Radars in NW Spain

open access: yesRemote Sensing, 2020
High-frequency (HF) radars are efficient tools for measuring vast areas and gathering ocean parameters in real-time. However, the accuracy of their wave estimates is under analysis.
Ana Basañez   +4 more
doaj   +1 more source

Hereditary Mathematical Model of the Dynamics of Radon Accumulation in the Accumulation Chamber

open access: yesMathematics, 2023
Mathematical modeling is used to study the hereditary mechanism of the accumulation of radioactive radon gas in a chamber with gas-discharge counters at several observation points in Kamchatka.
Dmitrii Tverdyi   +2 more
doaj   +1 more source

Full‐wave modeling of EMIC waves near the He+ gyrofrequency

open access: yesGeophysical Research Letters, 2016
Electromagnetic ion cyclotron (EMIC) waves are known to be excited by the cyclotron instability associated with hot and anisotropic ion distributions in the equatorial region of the magnetosphere and are thought to play a key role in radiation belt ...
Eun‐Hwa Kim, Jay R. Johnson
doaj   +1 more source

On the assessment of the wave modeling uncertainty in wave climate projections

open access: yesEnvironmental Research Letters, 2023
This study investigates the epistemic uncertainty associated with the wave propagation modeling in wave climate projections. A single-forcing, single-scenario, seven-member global wave climate projection ensemble is used, developed using three wave ...
Hector Lobeto   +7 more
doaj   +1 more source

On the Relationship between the Fractal Dimension of Geomagnetic Variations at Altay and the Space Weather Characteristics

open access: yesMathematics, 2023
The fractal dimension of geomagnetic field component variations (horizontal—H, vertical—Z and magnetic declination—D) at the Baigazan magnetic station at Russian Altay, for the period 2011–2013, were calculated using the Higuchi method.
Alexey Gvozdarev, Roman Parovik
doaj   +1 more source

Wave Equation Numerical Simulation and RTM With Mixed Staggered-Grid Finite-Difference Schemes

open access: yesFrontiers in Earth Science, 2022
For the conventional staggered-grid finite-difference scheme (C-SFD), although the spatial finite-difference (FD) operator can reach 2Mth-order accuracy, the FD discrete wave equation is the only second-order accuracy, leading to low modeling accuracy ...
Wei Liu   +10 more
doaj   +1 more source

Modelling nonlinear hydroelastic waves [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011
This paper uses the special Cosserat theory of hyperelastic shells satisfying Kirchoff’s hypothesis and irrotational flow theory to model the interaction between a heavy thin elastic sheet and an infinite ocean beneath it. From a general discussion of three-dimensional motions, involving an Eulerian description of the flow and a Lagrangian description ...
Plotnikov, P I, Toland, John F
openaire   +3 more sources

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

Numerical Analysis of a Horizontal Pressure Differential Wave Energy Converter

open access: yesEnergies, 2022
CFD modeling of an innovative wave energy device has been carried out in this study. OpenFoam wave modeling solver interFoam has been employed in order to investigate the energy extraction capability of the wave energy device.
Manimaran Renganathan, Mamdud Hossain
doaj   +1 more source

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