Results 51 to 60 of about 447,130 (281)

Numerical Simulation of the Cold-Start Process of Polymer Electrolyte Fuel Cell

Energies, 2023
In this study, the cold-start process of a polymer electrolyte fuel cell has been numerically investigated under various ambient temperatures and operating currents, ranging from subzero to 283 K.
Yazhou Chen, Sheng Li, Jie Peng, Weilin Zhuge, Yangjun Zhang   +4 more
doaj   +1 more source

Fabrication of Super Hydrophobic Gas Diffusion Layers [PDF]

ECS Meeting Abstracts, 2019
Gas diffusion layer (GDL) plays a significant role in water management and heat removal within the polymer electrolyte fuel cells (PEFCs). When the GDL is flooded with liquid water, PEFC undergoes mass transport losses due to pore blockage by water which leads to decreased cell performance.
Deepashree Sudhir Thumbarathy, Prodip K Das   +1 more
openaire   +1 more source

Secular Gravitational Instability of a Dust Layer in Shear Turbulence

, 2011
We perform a linear stability analysis of a dust layer in a turbulent gas disk. Youdin (2011) investigated the secular gravitational instability of a dust layer using hydrodynamic equations with a turbulent diffusion term.
Bai, Bai, Barranco, Binney, Chandrasekhar, Chiang, Coradini, Cuzzi, Dominik, Eiichiro Kokubo, Hayashi, Ishitsu, Johansen, Johansen, Lee, Lee, Michikoshi, Michikoshi, Michikoshi, Michikoshi, Safronov, Sano, Sekiya, Sekiya, Shakura, Shu, Shu-ichiro Inutsuka, Shugo Michikoshi, Stokes, Wakita, Ward, Ward, Weidenschilling, Yamoto, Youdin, Youdin, Youdin, Youdin   +37 more
core   +1 more source

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

PHOTOIONIZED MIXING LAYER MODELS OF THE DIFFUSE IONIZED GAS [PDF]

The Astrophysical Journal, 2009
9 pages, 7 figures, accepted in ...
Binette, L., Flores-Fajardo, N., Raga, A. C., Drissen, L., Morisset, C.   +4 more
openaire   +2 more sources

Modeling chemistry in and above snow at Summit, Greenland – Part 1: Model description and results [PDF]

, 2011
Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases.
Dibb, JE, Huey, LG, Lefer, B, Stutz, J, Thomas, JL, Toyota, K, von Glasow, R   +6 more
core   +3 more sources

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Numerical investigation of heat and mass transfer processes in a spherical layer of viscous incompressible liquid with free boundaries

MATEC Web of Conferences, 2016
The results of mathematical modelling of the dynamics of a mixture of the viscous incompressible liquid and gas, which fills a spherical layer with free boundaries and contains a gas bubble within itself, are presented in this paper.
Zakurdaeva Alia
doaj   +1 more source

Estimation of Binary Infinite Dilute Diffusion Coefficient Using Artificial Neural Network

Journal of Chemical and Petroleum Engineering, 2014
In this study, the use of the three-layer feed forward neural network has been investigated for estimating of infinite dilute diffusion coefficient ( D12 ) of supercritical fluid (SCF), liquid and gas binary systems. Infinite dilute diffusion coefficient
Majid Mohadesi, Gholamreza Morad, Hosnie-Sadat Mousavi   +2 more
doaj   +1 more source