Results 11 to 20 of about 146,403 (298)

On the Optimization of Point Absorber Buoys [PDF]

open access: yesJournal of Marine Science and Engineering, 2014
A point absorbing wave energy converter (WEC) is a complicated dynamical system. A semi-submerged buoy drives a power take-off device (PTO), which acts as a linear or non-linear damper of the WEC system.
Linnea Sjökvist   +5 more
doaj   +2 more sources

A Novel 2-D Point Absorber Numerical Modelling Method [PDF]

open access: yesInventions, 2021
Despite several wave energy converters (WECs) having been developed to present, no particular concept has emerged yet. The existing inventions vary significantly in terms of the operation principle and complexity of WECs.
Gianmaria Giannini   +3 more
doaj   +5 more sources

A Review of Point Absorber Wave Energy Converters

open access: yesJournal of Marine Science and Engineering, 2022
There are more than thousands of concepts for harvesting wave energy, and wave energy converters (WECs) are diverse in operating principles, design geometries and deployment manners, leading to misconvergence in WEC technologies.
Bingyong Guo   +5 more
doaj   +2 more sources

Point absorbers in Advanced LIGO [PDF]

open access: yesApplied Optics, 2021
Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduce the sensitivity of the interferometer directly though a reduction in the power ...
Aidan F. Brooks   +201 more
openaire   +6 more sources

Geometric Development of Point Absorber Wave Energy Conventer [PDF]

open access: yesMATEC Web of Conferences, 2018
This paper describes how to design the shape of a floating object that will be used as a point absorber on wave energy converster. The buoyant shape to be analyzed is a tube has a flat top plane with varying bottom plane, i.e cylinder, hemisphare and ...
Saptono Warpindyasmoro Heri   +1 more
doaj   +2 more sources

Point Absorber Limits to Future Gravitational-Wave Detectors [PDF]

open access: yesPhysical Review Letters, 2021
7 pages, 3 ...
Wenxuan Jia   +199 more
openaire   +5 more sources

Heaving buoys, point absorbers and arrays [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
Absorption of wave energy may be considered as a phenomenon of interference between incident and radiated waves generated by an oscillating object; a wave-energy converter (WEC) that displaces water. If a WEC is very small in comparison with one wavelength, it is classified as a point absorber (PA); otherwise, as a ‘quasi-point absorber’.
Johannes, Falnes, Jørgen, Hals
openaire   +2 more sources

Control of a Point Absorber Using Reinforcement Learning [PDF]

open access: yesIEEE Transactions on Sustainable Energy, 2016
This work presents the application of reinforcement learning for the optimal resistive control of a point absorber. The model-free Q-learning algorithm is selected in order to maximise energy absorption in each sea state. Step changes are made to the controller damping, observing the associated penalty, for excessive motions, or reward, i.e.
Enrico Anderlini   +4 more
openaire   +5 more sources

Perfectly Absorbing Exceptional Points and Chiral Absorbers

open access: yesPhysical Review Letters, 2019
6 pages main text, 4 supplemental; 3 ...
Sweeney, William R.   +3 more
openaire   +4 more sources

Strong Disorder Fixed Point in Absorbing-State Phase Transitions [PDF]

open access: yesPhysical Review Letters, 2003
The effect of quenched disorder on non-equilibrium phase transitions in the directed percolation universality class is studied by a strong disorder renormalization group approach and by density matrix renormalization group calculations. We show that for sufficiently strong disorder the critical behaviour is controlled by a strong disorder fixed point ...
Hooyberghs, Jef   +2 more
openaire   +3 more sources

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