Results 141 to 150 of about 4,247,919 (214)

New inequalities involving the geometric-arithmetic index

open access: yes, 2017
URL: http://match.pmf.kg.ac.rs.sabidi.urv.cat/content78n2.htm NO DOI Filiació URV ...
openaire   +2 more sources

Comparative Analysis of Al2O3/Water–TiO2/Chlorophyll Hybrid Nanofluids in a Photovoltaic–Thermal Solar Water Heating System

open access: yesEnergy Science &Engineering, EarlyView.
TiO2/chlorophyll bio‐hybrid nanofluid achieved the highest PVT performance, increasing thermal efficiency to 38.74% and overall efficiency to 51.35%, compared with 35.96% and 48.45% for Al2O3/water and 27.77% and 40.18% for water. The results demonstrate the potential of bio‐hybrid nanofluids for high‐efficiency solar thermal energy conversion ...
Oluwaseyi Omotayo Alabi   +2 more
wiley   +1 more source

Hydrogen Production With Water Electrolysis Technologies: Advances, Performance, and Potential Use for Low‐Gradient Combustion

open access: yesEnergy Science &Engineering, EarlyView.
This review links recent advances in water electrolysis with hydrogen utilization in low‐gradient combustion systems. While hydrogen eliminates direct CO2 emissions, its environmental and economic benefits depend strongly on production pathways, system‐level efficiency, and NOx mitigation through MILD/FLOX/HiTAC combustion.
Rafał Buczyński, Przemysław Draga
wiley   +1 more source

HRR–Time Behaviour of Untreated Wood Under SBI Conditions: Implications for the Interpretation of FIGRA and THR600

open access: yesFire and Materials, EarlyView.
ABSTRACT Reaction‐to‐fire classification of wood‐based materials in Europe relies on SBI‐derived parameters such as FIGRA and THR600. While these parameters provide a robust and practical basis for classification, their relationship to the underlying HRR–time development remains difficult to interpret.
Steven J. Paulussen
wiley   +1 more source

Combustion Properties of Timber in Historic Structures: Case Study of the São Pedro de Alcântara Chapel Fire

open access: yesFire and Materials, EarlyView.
ABSTRACT Timber plays a fundamental role in the fire performance of historic building components, where ageing and environmental exposure can markedly influence its physical and chemical properties. This study presents an experimental investigation of the fire behaviour of Ocotea sp.
João Vitor Lopes Ferreira   +4 more
wiley   +1 more source

Exact Computation of the Color Function for Triangular Element Interfaces

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
We propose a robust algorithm, the Front2VOF algorithm, to compute the color function for triangular element interfaces in Front‐Tracking methods on a Cartesian mesh. ABSTRACT The calculation of the volume enclosed by curved surfaces discretized into triangular elements and a cube is of great importance in different domains, such as computer graphics ...
Jieyun Pan   +8 more
wiley   +1 more source

ASSOCIATION BETWEEN ARITHMETIC MEAN AND GEOMETRIC MEAN

open access: yes
This article explores the association between the arithmetic mean and the geometric mean. It examines their mathematical properties, comparative values, and applications in problem-solving.
Abdullayeva Gulasal Abdumo‘Minovna
core   +1 more source

Immersed Boundary Projection Method for Boundaries With Slip Velocities

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
A formulation of the immersed boundary method for incompressible flow over arbitrarily‐shaped bodies with surface slip described by the Navier boundary condition is presented. The wall slip velocity and the boundary force are determined implicitly through a projection to satisfy both the boundary condition and the divergence‐free condition of the ...
Takehiro Fujii, Takeshi Omori
wiley   +1 more source

Temporal Robustness in Cross‐Country Gross Domestic Product Forecasting: Evidence From Classical, Regime‐Switching, and Ensemble Models

open access: yesJournal of Forecasting, EarlyView.
ABSTRACT This study evaluates whether the relative performance of gross domestic product forecasting models is temporally robust across economies and changing macroeconomic conditions. Using annual real gross domestic product data from the World Bank for 177 separately reported economies and territories, we conduct a common‐vintage pseudo‐out‐of‐sample
Achilleas Tampouris, Chaido Dritsaki
wiley   +1 more source

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