Results 51 to 60 of about 2,123,170 (163)

Finite-Range Gravity and Its Role in Gravitational Waves, Black Holes and Cosmology [PDF]

, 2002
Theoretical considerations of fundamental physics, as well as certain cosmological observations, persistently point out to permissibility, and maybe necessity, of macroscopic modifications of the Einstein general relativity.
Babak S. V., Bose S., Boulware D. G., Deffayet C., Faddeev L. D., Feynman R. P., Fierz M., Finn L. S., Fock V. A., Iwasaki Y., Kogan I. I., Kogan I. I., L. P. GRISHCHUK, Landau L. D., Landau L. D., Misner C. W., Morse P. M., Papapetrou A., Porrati M., S. V. BABAK, Vainstein A. I., Weinberg S., Weinberg S., Will C. M., Zakharov V. I.   +24 more
core   +2 more sources

Maximum Power Exploitation of Photovoltaic System under Fast-Varying Solar Irradiation and Local Shading

International Journal of Photoenergy, 2022
The photovoltaic (PV) model commonly used in engineering has difficulty in accurately predicting the actual power generation. In this study, a PV model commonly used in engineering was used to establish a PV simulation model and improve it based on ...
Yi-Jui Chiu, Bi Li, Chin-Ling Chen, Shui-Yang Lien, Ding Chen, Ji-Ming Yi, Yung-Hui Shih   +6 more
doaj   +1 more source

Multi-Peak Photovoltaic Maximum Power Point Tracking Method Based on Honey Badger Algorithm Under Localized Shading Conditions

Energies
The P-V and I-V curves of photovoltaic (PV) strings show multiple peaks when exposed to partial shading conditions (PSCs). The traditional maximum power point tracking (MPPT) method cannot track the global maximum power point (GMPP) due to the multi-peak characteristics, power fluctuation, and tracking speed.
Qianjin Gui, Lei Wang, Chao Ding, Wenfa Xu, Xiaoyang Li, Feilong Yu, Haisen Wang   +6 more
openaire   +2 more sources

Velocity Fields in Non--Gaussian Cold Dark Matter Models [PDF]

, 1994
We analyse the large--scale velocity field obtained by N--body simulations of cold dark matter (CDM) models with non--Gaussian primordial density fluctuations, considering models with both positive and negative primordial skewness in the density ...
Lucchin, F., Matarrese, S., Messina, A., Moscardini, L., Tormen, G.   +4 more
core   +3 more sources

MPPT of a Photovoltaic Panels Array with Partial Shading Using the IPSM with Implementation Both in Simulation as in Hardware

Energies, 2020
This article presents a method for the Maximum Power Point Tracking (MPPT) of a Photovoltaic (PV) panels array with partial shading, applying an Improved Pattern Search Method (IPSM).
Andrés Tobón, Julián Peláez-Restrepo, Jhon Montano, Mariana Durango, Jorge Herrera, Asier Ibeas   +5 more
doaj   +1 more source

Features of spatial distribution of oscillations in faculae regions

, 2011
We found that oscillations of LOS velocity in H-alpha are different for various parts of faculae regions. Power spectra show that the contribution of low-frequency modes (1.2 - 2 mHz) increase at the network boundaries.
B. Pontieu De, C. Lindsey, D.T. Woods, E.V. Khomenko, F.-L. Deubner, F.Q. Orrall, H. Balthasar, K. Muglach, M. Livshits, M. Stix, N. I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.R. Sheeley, R. Centeno, R. Centeno, R. Howard, S. Bard, V. A. Pulyaev   +20 more
core   +1 more source

Necessity Analysis of Bypass Diode for AC Module under Partial Shading Condition

Energies, 2021
To protect a photovoltaic module from the hot spot effect more efficiently, an AC (alternating current) module that contains a module-level MPPT (maximum power point tracking) has been put forward.
Huixue Ren, Peide Han
doaj   +1 more source

Accurate Maximum Power Tracking in Photovoltaic Systems Affected by Partial Shading

International Journal of Photoenergy, 2015
A maximum power tracking algorithm exploiting operating point information gained on individual solar panels is presented. The proposed algorithm recognizes the presence of multiple local maxima in the power voltage curve of a shaded solar field and ...
Pierluigi Guerriero, Fabio Di Napoli, Vincenzo d’Alessandro, Santolo Daliento   +3 more
doaj   +1 more source

Transforming mesoscale granular plasticity through particle shape

, 2018
When an amorphous material is strained beyond the point of yielding it enters a state of continual reconfiguration via dissipative, avalanche-like slip events that relieve built-up local stress.
Dahmen, Karin A., Jaeger, Heinrich M., Murphy, Kieran A.   +2 more
core   +1 more source

Adaptive particle swarm optimization based model predictive control MPPT algorithm for PV systems under partial shading conditions

Results in Engineering
High step-up DC/DC converter and the Maximum Power Point Tracking (MPPT) technique is more critical for photovoltaic (PV) systems to extract the Maximum Power Point (MPP) from PV systems due to variations in climate conditions.
Haider Alhusseini, Layth Mohammed Abdali, Hayder Abdulsahib Issa, Vladimir I. Velkin   +3 more
doaj   +1 more source