Results 21 to 30 of about 1,930,267 (286)

Experiments Validating the Effectiveness of Multi-point Wireless Energy Transmission with Carrier Shift Diversity [PDF]

open access: yes, 2014
This paper presents a method to seamlessly extend the coverage of energy supply field for wireless sensor networks in order to free sensors from wires and batteries, where the multi-point scheme is employed to overcome path-loss attenuation, while the ...
Araki, Kiyomichi   +4 more
core   +1 more source

Effect of Blade Profile on the Performance of Wells Turbine under Unidirectional Sinusoidal and Real Sea Flow Conditions

open access: yesInternational Journal of Rotating Machinery, 2007
This paper presents the effect of blade profile and rotor solidity on the performance of Wells turbine operating under unidirectional unsteady flow conditions. In the study, four kinds of blade profile were selected, that is, NACA0020, NACA0015, CA9, and
A. Thakker, R. Abdulhadi
doaj   +1 more source

Optimizing machine learning models for granular NdFeB magnets by very fast simulated annealing

open access: yesScientific Reports, 2021
The macroscopic properties of permanent magnets and the resultant performance required for real implementations are determined by the magnets’ microscopic features. However, earlier micromagnetic simulations and experimental studies required relatively a
Hyeon-Kyu Park   +3 more
doaj   +1 more source

Hydrodynamic Analysis of 3-SPS Wave Energy Conversion Device [PDF]

open access: yesE3S Web of Conferences, 2021
Wave energy has the advantages of high energy density, renewability, and wide distribution, and has been highly valued by many coastal countries.
Ji Zhifei   +3 more
doaj   +1 more source

Numerical optimization of Wells turbine for wave energy extraction

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2017
The present work focuses multi-objective optimization of blade sweep for a Wells turbine. The blade-sweep parameters at the mid and the tip sections are selected as design variables.
Paresh Halder   +2 more
doaj   +1 more source

Geometric renormalization of large energy wave maps [PDF]

open access: yes, 2004
There has been much progress in recent years in understanding the existence problem for wave maps with small critical Sobolev norm (in particular for two-dimensional wave maps with small energy); a key aspect in that theory has been a renormalization ...
Tao, Terence
core   +3 more sources

Blast wave energy diagnostic [PDF]

open access: yesReview of Scientific Instruments, 2008
The distance radiation waves that supersonically propagate in optically thick, diffusive media are energy sensitive. A blast wave can form in a material when the initially diffusive, supersonic radiation wave becomes transonic. Under specific conditions, the blast wave is visible with radiography as a density perturbation.
Thomas E, Tierney   +11 more
openaire   +2 more sources

Low-temperature excitations within the Bethe approximation [PDF]

open access: yes, 2013
We propose the variational quantum cavity method to construct a minimal energy subspace of wave vectors that are used to obtain some upper bounds for the energy cost of the low-temperature excitations. Given a trial wave function we use the cavity method
Biazzo, I., Ramezanpour, A.
core   +2 more sources

Effects of Compressibility on the Performance of a Wave-Energy Conversion Device with an Impulse Turbine Using a Numerical Simulation Technique

open access: yesInternational Journal of Rotating Machinery, 2003
This article presents work carried out to predict the behavior of a 0.6 m impulse turbine with fixed guide vanes as compared with that of a 0.6 hub-to-tip ratio turbine under real sea conditions.
A. Thakker   +3 more
doaj   +1 more source

An Improved Approach to Wave Energy Resource Characterization for Sea States with Multiple Wave Systems

open access: yesJournal of Marine Science and Engineering, 2022
Generally, wave energy resource assessment and characterization are performed based on an entire wave spectrum, ignoring the detailed energy features that belong to wave systems, i.e., wind waves and swells. In reality, the energy is separately possessed
Xingjie Jiang   +4 more
doaj   +1 more source

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