Results 1 to 10 of about 5,744,719 (266)

The Coefficients of Powers of Bazilević Functions [PDF]

open access: yesMathematics, 2018
In the present work, a sharp bound on the modulus of the initial coefficients for powers of strongly Bazilević functions is obtained. As an application of these results, certain conditions are investigated under which the Littlewood-Paley conjecture holds for strongly Bazilević functions for large values of the parameters involved therein.
Nak Eun Cho   +2 more
openaire   +2 more sources

Analysis of Influence of Tilt Angle on Variable-Speed Fixed-Pitch Floating Offshore Wind Turbines for Optimizing Power Coefficient Using Experimental and CFD Models

open access: yesInternational Journal of Renewable Energy Development, 2021
This study focused on optimization of the power coefficient of floating offshore wind turbines (FOWTs) to maintain their wind power performance in order to overcome problems with the tilt angle resulting from an unstable wind turbine platform, which can ...
Wongsakorn Wisatesajja   +2 more
doaj   +1 more source

Congruences for the coefficients of the powers of the Euler Product [PDF]

open access: yesThe Ramanujan Journal, 2019
Let $p_k(n)$ be given by the $k$-th power of the Euler Product $\prod _{n=1}^{\infty}(1-q^n)^k=\sum_{n=0}^{\infty}p_k(n)q^{n}$. By investigating the properties of the modular equations of the second and the third order under the Atkin $U$-operator, we determine the generating functions of $p_{8k}(2^{2α} n +\frac{k(2^{2α}-1)}{3})$ $(1\leq k\leq 3)$ and $
Julia Q. D. Du   +2 more
openaire   +2 more sources

On the coefficients of symmetric power L-functions [PDF]

open access: yesInternational Journal of Number Theory, 2018
We study the signs of the Fourier coefficients of a newform. Let [Formula: see text] be a normalized newform of weight [Formula: see text] for [Formula: see text]. Let [Formula: see text] be the [Formula: see text]th Fourier coefficient of [Formula: see text].
MEHER, J   +2 more
openaire   +4 more sources

Experimental, Numerical and Application Analysis of Hydrokinetic Turbine Performance with Fixed Rotating Blades

open access: yesEnergies, 2020
In this study, a hydrokinetic turbine is designed for the high-altitude regions where local electricity network lines are difficult to reach. If there was a stream flow around, electricity production could be possible and necessary because of ...
Faruk Guner, Hilmi Zenk
doaj   +1 more source

Experimental Study of the Performance of a Novel Vertical-Axis Wind Turbine

open access: yesApplied Sciences, 2020
Basic equations for estimating the aerodynamic power captured by the Anderson vertical-axis wind turbine (AVAWT) are derived from a solution of Navier–Stokes (N–S) equations for a baroclinic inviscid flow.
James Agbormbai, Weidong Zhu
doaj   +1 more source

Experimental Investigation of Bladeless Power Generator from Wind-induced Vibration

open access: yesInternational Journal of Renewable Energy Development, 2022
The power harvester unit from flow-induced vibration (FIV) was designed to harness energy from low flow velocity based on the magnetostrictive effect on the galfenol (Fe – Ga alloy) strip induced by the oscillating bluff body.
La Ode Ahmad Barata   +4 more
doaj   +1 more source

Computational Optimization of Adaptive Hybrid Darrieus Turbine: Part 1

open access: yesFluids, 2019
Darrieus-type Vertical Axis Wind Turbines (VAWT) are promising for small scale decentralized power generation because of their unique advantages such as simple design, insensitive to wind direction, reliability, and ease of maintenance.
Palanisamy Mohan Kumar   +5 more
doaj   +1 more source

Numerical Experiments on Hydrodynamic Performance and the Wake of a Self-Starting Vertical Axis Tidal Turbine Array

open access: yesJournal of Marine Science and Engineering, 2022
In this paper, based on the CFD software ANSYS-Fluent, two-dimensional numerical models are established to investigate the hydrodynamic performance of a self-starting H-Darrius vertical axis tidal turbine (VATT) array of three turbines in a triangular ...
Lining Zhu   +3 more
doaj   +1 more source

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