Results 21 to 30 of about 144,649 (295)

Occurrence of LINE, gypsy-like, and copia-like retrotransposons in the clonally propagated sweet potato (Ipomoea batatas L.) [PDF]

open access: yes, 2011
Retrotransposons are a class of transposable elements that represent a major fraction of the repetitive DNA of most eukaryotes. Their abundance stems from their expansive replication strategies.
Dieters, Mark   +3 more
core   +2 more sources

Power reserve control strategy of PV system for active power reserve under dynamic shading patterns

open access: yesArray, 2022
The de-loading technique in photovoltaics is used to reserve some active power for frequency regulation purposes. However, the selection of the de-loading method depends upon the shading conditions of photovoltaics.
Pankaj Verma, Tarlochan Kaur
doaj   +1 more source

Efficiency analysis of PV power plants shaded by MV overhead lines [PDF]

open access: yes, 2016
This paper deals with the occurrence of hot spot phenomena in photovoltaic (PV) systems under partial shading caused by objects on some parts of the modules.
Dolara, Alberto   +2 more
core   +2 more sources

A zero switch and sensorless reconfiguration approach for sustainable operation of roof‐top photovoltaic system during partial shading

open access: yesIET Renewable Power Generation, 2023
Photovoltaic (PV) roof‐top systems in real‐time environments are highly susceptible to the commonly occurring scenario of partial shading that occurs due to unavoidable conditions such as the shadow of buildings and trees.
Belqasem Aljafari   +3 more
doaj   +1 more source

Analysis of surface parametrizations for modern photometric stereo modeling [PDF]

open access: yes, 2015
Tridimensional shape recovery based on Photometric Stereo (PS) recently received a strong improvement due to new mathematical models based on partial differential irradiance equation ratios.
Cremers, Daniel   +2 more
core   +1 more source

Experimental Investigation of Photovoltaic Partial Shading Losses under Different Operation Conditions

open access: yesمجلة النهرين للعلوم الهندسية, 2020
The partial shading conditions have a significant effect on the performance of Photovoltaic system and the ability of delivering energy. In this study, the impact of different partial shading on the mono crystalline (88W) PV module performance was ...
Ali H. Numan   +2 more
doaj   +1 more source

The shading sign: is it exclusive of endometriomas? [PDF]

open access: yes, 2015
To investigate if the shading sign is an exclusive MRI feature of endometriomas or endometrioid tumors, and to analyze its different patterns. Three hundred and fourty six women with adnexal masses who underwent 1.5/3-T MRI were included in this ...
Cunha, Teresa Margarida   +3 more
core   +3 more sources

A Psychoacoustic Investigation on the Effect of External Shading Devices on Building Facades [PDF]

open access: yes, 2016
Due to energetic and natural lighting factors, building facades often present external shading devices, but the acoustic properties of such devices have not yet been well studied.
Aletta, F.   +4 more
core   +4 more sources

Impact of partial shading on the output power of PV systems under partial shading conditions

open access: yesIET Power Electronics, 2014
A major challenge in the photovoltaics (PV) systems is to make it energy efficient. Partial shading reduces the energy yield of PV systems and introduces multiple peaks in the P – V characteristics.
Indu Rani Balasubramanian   +2 more
openaire   +1 more source

Performance and Reliability Improvement of Partially Shaded PV Arrays by One-Time Electrical Reconfiguration

open access: yesIEEE Access, 2022
Partial shading is the most unexpected scenario encountered by the arrays that degrade the performance causing power reduction, non-convex characteristics curves, losses, hotspot, module damage, and system failure. The adoption of various reconfiguration
Priya Ranjan Satpathy   +5 more
doaj   +1 more source

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