Results 41 to 50 of about 8,811,391 (311)

On the Concept of Model in Physics

The Educational Review, USA, 2023
The concept of model is the basis for theoretical and experimental research in physics. A model is defined as an application of physical theories to the description of a physical system. As a premise to the introduction of models, physical theories are defined as mathematical frameworks with a hypothetical-deductive structure, provided with a mapping ...
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Accurate parameter identification of solar cells and photovoltaic modules under real conditions using a new Differential Evolution approach

Unconventional Resources
The global shift towards solar energy has intensified the need for advanced research on high-efficiency photovoltaic (PV) systems. Accurate extraction of PV parameters from current-voltage curves is critical for precise simulation, evaluation, and ...
Driss Saadaoui, Mustapha Elyaqouti, Imade Choulli, Ismail Abazine, Abdelfattah Elhammoudy, Souad Lidighbi, Dris Ben Hmamou, Brahim Ydir, El Hanafi Arjdal, Khalid Assalaou   +9 more
doaj   +1 more source

Exploring the phase stability in interpenetrated diamondoid covalent organic frameworks

Communications Chemistry, 2023
While stimuli-responsive metal-organic frameworks have been widely investigated, much less is understood about structural flexibility in their covalent counterparts.
Sander Borgmans, Sven M. J. Rogge, Juul S. De Vos, Pascal Van Der Voort, Veronique Van Speybroeck   +4 more
doaj   +1 more source

Physical modelling in biomechanics [PDF]

Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 2003
Physical models, like mathematical models, are useful tools in biomechanical research. Physical models enable investigators to explore parameter space in a way that is not possible using a comparative approach with living organisms: parameters can be varied one at a time to measure the performance consequences of each, while values and combinations not
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Method of physical simulation of macro processes of solidification of castings on transparent models and liquids.

Литьë и металлургия, 2021
The technique of physical modeling of macro processes of solidification of castings on transparent models and liquids has been developed. The model liquids may be water with different salt contents.
E. I. Marukovich, V. Yu. Stetsenko, A. V. Stetsenko   +2 more
doaj   +1 more source

Optimization of PV parameters under varied environmental conditions: A hybrid secant–Newton-Raphson method

Unconventional Resources
Photovoltaic (PV) systems play a crucial role in renewable energy production, and accurate parameter estimation is essential for modeling and performance analysis. In this paper, a hybrid method combining the secant and Newton-Raphson methods is employed
Brahim El Fahmi, Driss Saadaoui, Imade Choulli, Khalid Assalaou, Ismail Abazine, Mustapha Elyaqouti, El hanafi Arjdal, Mohammed Agdam, Yassine El aidi Idrissi   +8 more
doaj   +1 more source

A New Approach for Approximate Solution of ADE: Physical-Based Modeling of Carriers in Doping Region

Mathematics, 2021
The electric behavior in semiconductor devices is the result of the electric carriers’ injection and evacuation in the low doping region, N-. The carrier’s dynamic is determined by the ambipolar diffusion equation (ADE), which involves the main physical ...
Leobardo Hernandez-Gonzalez, Jazmin Ramirez-Hernandez, Oswaldo Ulises Juarez-Sandoval, Miguel Angel Olivares-Robles, Ramon Blanco Sanchez, Rosario del Pilar Gibert Delgado   +5 more
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Influence of Bubble Shape on Mass Transfer in Multiphase Media: CFD Analysis of Concentration Gradients

Fluids
Our study investigates how non-spherical bubble shapes influence gas–liquid mass transfer across the bubble interface. An analytical shape descriptor, namely Superformula, is used to parametrically define the bubble interface, enabling efficient CFD ...
Irina Nizovtseva, Pavel Mikushin, Ilya Starodumov, Ksenia Makhaeva, Margarita Nikishina, Sergey Vikharev, Olga Averkova, Dmitri Alexandrov, Dmitrii Chernushkin, Sergey Lezhnin   +9 more
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Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo, Shehu Umar Abdullahi, Hassan Adam Murtala, Halima Kabir, Khadija A. Shamsu, Sari A. Acra, Virginia A. Stallings, Mark Rodeghier, Michael R. DeBaun, Lauren J. Klein   +9 more
wiley   +1 more source

A stable and efficient hybrid Analytical–BSLO algorithm for accurate photovoltaic parameter estimation

Unconventional Resources
Accurate extraction of photovoltaic model parameters is essential for optimal system design and performance prediction. This study introduces a hybrid methodology combining analytical techniques with the Blood-Sucking Leech Optimizer to estimate the five
Brahim El Fahmi, Driss Saadaoui, Imade Choulli, Khalid Assalaou, Ismail Abazine, Mustapha Elyaqouti, El hanafi Arjdal, Ayoub Lahboub, Fatima Ezzahrae Souaidi   +8 more
doaj   +1 more source