Results 71 to 80 of about 1,959,412 (322)

Physics‐Constrained Constitutive Learning of Rate‐Limiting Timescales for Efficient Hydrogen‐Based Direct Reduction for Green Steel Making

Advanced Science, EarlyView.
A conversion‐resolved constitutive framework is developed for the hydrogen‐based direct reduction of iron oxide pellets. Effective reaction and transport timescales are inferred directly from measured trajectories and mapped against operating conditions, pellet architecture, and composition. The analysis reveals how late‐stage transport control emerges
Anurag Bajpai, Barak Ratzker, Pasquale Cavaliere, Dierk Raabe   +3 more
wiley   +1 more source

An asymptotic formula of cosine power sums

Le Matematiche, 2013
In the paper, the authors find several accurate approximations of some cosine power sums and present an asymptotic formula for these cosine power sums.
Mircea Merca, Tanfer Tanriverdi
doaj  

On the Asymptotic Expansions of the (p,k)-Analogues of the Gamma Function and Associated Functions

Axioms
General asymptotic expansion of the (p,k)-gamma function is obtained and various approaches to this expansion are studied. The numerical precision of the derived asymptotic formulas is shown and compared.
Tomislav Burić
doaj   +1 more source

Asymptotics of the Wigner 9j symbol

, 2009
We present the asymptotic formula for the Wigner 9j-symbol, valid when all quantum numbers are large, in the classically allowed region. As in the Ponzano-Regge formula for the 6j-symbol, the action is expressed in terms of lengths of edges and dihedral ...
Alesci E Bianchi E Magliaro E Perini C, Aquilanti V, Baez J C, Barrett J W, Barrett J W, Barrett J W Dowdall R J Fairbairn W J Gomes H Hellmann F, Biedenharn L C, Biedenharn L C, Charles L, de Gosson M, Edmonds A R, Freidel L, Hal M Haggard, Kapovich M, Marsden J E, Maslov V P, Mishchenko A S, Ponzano G, Robert G Littlejohn, Taylor Y U Woodward C T, Trinkhaus H, Varshalovich D A, Wigner E P, Williams R M, Yutsis A P   +24 more
core   +1 more source

Impedance of Nonelectroneutral Solid Electrolyte Interphases With Nanopores: A Theoretical Model

Advanced Science, EarlyView.
Physical modeling reveals that often‐neglected non‐electroneutrality and nanopores in the solid‐electrolyte interphase (SEI) govern the impedance behavior. Under nonreactive conditions, the low‐frequency constant‐phase element (CPE) phenomenon can be attributed to the nonelectroneutral local conditions in the SEI.
Chenkun Li, Jun Huang
wiley   +1 more source

Limit theorems for rank-one Lie groups [PDF]

, 2012
We investigate asymptotic behaviour of averaging operators for actions of simple rank-one Lie groups. It was previously known that these averaging operators converge almost everywhere, and we establish a more precise asymptotic formula that describes ...
Gorodnik, Alexander, Ramirez, Felipe A.
core  

Asymptotics of class numbers

, 2005
A "simple trace formula" is used to derive an asymptotic result for class numbers of complex cubic orders.Comment: 37 ...
116, 19, Anton Deitmar, Arthur, Arthur, Arthur, Cheeger, Deitmar, Deitmar, Efrat, Gauss, Kneser, Moscovici, Moscovici, Müller, Müller, Osborne, Randol, Sarnak, Speh, Wallace, Werner Hoffmann   +21 more
core   +1 more source

Low‐Power Control Of Resistance Switching Transitions in First‐Order Memristors

Advanced Electronic Materials, EarlyView.
Joule losses are a serious concern in modern integrated circuit design. In this regard, minimizing the energy necessary for programming memristors should be handled with care. This manuscript presents an optimal control framework, allowing to derive energy‐efficient programming voltage protocols for resistance switching devices. Following this approach,
Valeriy A. Slipko, Alon Ascoli, Fernando Corinto, Yuriy V. Pershin   +3 more
wiley   +1 more source

Modeling the separation of water‐in‐oil emulsions in continuously fed gravity settlers using millifluidic experiments

AIChE Journal, EarlyView.
Abstract Emulsion separation remains a persistent challenge in chemical and process industries due to the metastable nature of dispersed droplets. In gravity separators, the overall separation rate is governed by the formation of a densely packed zone (DPZ) of deforming and coalescing droplets that mediates between the dispersed and continuous phases ...
Andrei Zlobin, José Esteban Andino‐Enriquez, Thomas Gouëzec, Maurice Bourrel, Enric Santanach‐Carreras, Nicolas Passade‐Boupat, Laurence Talini, François Lequeux, Pascal Panizza   +8 more
wiley   +1 more source

Generalized Asymptotic Pointwise Contractions and Nonexpansive Mappings Involving Orbits

Fixed Point Theory and Applications, 2010
We give fixed point results for classes of mappings that generalize pointwise contractions, asymptotic contractions, asymptotic pointwise contractions, and nonexpansive and asymptotic nonexpansive mappings.
Nicolae Adriana
doaj