Results 31 to 40 of about 2,123,255 (261)

Constraints on Extragalactic Point Source Flux from Diffuse Neutrino Limits

open access: yes, 2009
We constrain the maximum flux from extragalactic neutrino point sources by using diffuse neutrino flux limits. We show that the maximum flux from extragalactic point sources is E^2(dN/dE) < 1.4 x 10^-9 (L_nu/2x10^43 erg/s)^1/3 GeV cm-^2 s^-1 from ...
A. P. Szabo   +3 more
core   +1 more source

Unjamming of Granular Packings due to Local Perturbations: Stability and Decay of Displacements

open access: yes, 2007
We study the mechanical response generated by local deformations in jammed packings of rigid disks. Based on discrete element simulations we determine the critical force of the local perturbation that is needed to break the mechanical equilibrium and ...
E. Kolb   +4 more
core   +1 more source

Modelling and control of partially shaded photovoltaic arrays [PDF]

open access: yes, 2013
The photovoltaic (PV) array controlled by Maximum Power Point Tracking (MPPT) method for optimum PV power generation, particularly when the PV array is under partially shaded condition is presented in this paper.
Chin, Chia Seet   +4 more
core   +1 more source

Development of a Global Maximum Power Point Tracker for Photovoltaic Module Arrays Based on the Idols Algorithm

open access: yesMathematics
The main objective of this paper is to develop a maximum power point tracker (MPPT) for a photovoltaic module array (PVMA) under conditions of partial shading and sudden changes in solar irradiance. PVMAs exhibit nonlinear characteristics with respect to
Kuei-Hsiang Chao, Yi-Chan Kuo
doaj   +1 more source

Analysis of spatial fixed PV arrays configurations to maximize energy harvesting in BIPV applications [PDF]

open access: yes, 2015
This paper presents a new approach for efficient utilization of building integrated photovoltaic (BIPV) systems under partial shading conditions in urban areas.
Celik, Berk   +4 more
core   +3 more sources

Global Maximum Power Point Tracking of a Photovoltaic Module Array Based on Modified Cat Swarm Optimization

open access: yesApplied Sciences
The main purpose of this study was to research and develop maximum power point tracking (MPPT) of a photovoltaic module array (PVMA) with partial module shading and sudden changes in solar irradiance. Modified cat swarm optimization (MCSO) was adopted to
Kuei-Hsiang Chao, Thi Bao-Ngoc Nguyen
doaj   +1 more source

MODIFIED HILL CLIMBING MAXIMUM POWER POINT TRACKING CONTROL METHOD FOR SATELLITE ELECTRICAL POWER SUPPLY SYSTEM

open access: yesАвіаційно-космічна техніка та технологія, 2017
The increasing of  efficiency of the satellite electrical power supply system (PSS) is important engineering task. Modern satellite PSS widely use DC-DC converters under pulse-width controlling.
Ali Mahmood Jasim
doaj   +1 more source

Analysis of Modulated Multivariate Oscillations

open access: yes, 2011
The concept of a common modulated oscillation spanning multiple time series is formalized, a method for the recovery of such a signal from potentially noisy observations is proposed, and the time-varying bias properties of the recovery method are derived.
Lilly, Jonathan M., Olhede, Sofia C.
core   +1 more source

Experimental validation of novel hybrid Grey Wolf Equilibrium Optimization for MPPT to improve the efficiency of solar photovoltaic system

open access: yesResults in Engineering
This paper introduces a novel strategy for tracking the Maximum Power Point (MPP) using Grey Wolf Equilibrium Optimizer (GWEO) algorithm, which integrates a search mechanism of Grey Wolf Optimizer (GWO) and Equilibrium Optimizer (EO).
Feriel Abdelmalek   +4 more
doaj   +1 more source

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

open access: yesInternational 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   +6 more
doaj   +1 more source

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