Results 51 to 60 of about 10,083 (253)
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This study employed an adaptive iterative strategy combining machine learning algorithms, domain knowledge, experimental design, and experimental feedback to aim to precisely and quickly discover high‐entropy ceramics with excellent energy storage performance.
Haowen Liu +4 more
wiley +1 more source
A hypothesis on ergodicity and the signal‐to‐noise paradox
Atmospheric Science LettersThis letter raises the possibility that ergodicity concerns might have some bearing on the signal‐to‐noise paradox. This is explored by applying the ergodic theorem to the theory behind ensemble weather forecasting and the ensemble mean.
Daniel J. Brener
doaj +1 more source
Measurement-Induced Dynamical Quantum Thermalization
EntropyOne of the fundamental problems of quantum statistical physics is how an ideally isolated quantum system can ever reach thermal equilibrium behavior despite the unitary time evolution of quantum-mechanical systems.
Marvin Lenk +3 more
doaj +1 more source
Anomalous diffusion and ergodicity breaking in heterogeneous diffusion processes
New Journal of Physics, 2013 We demonstrate the non-ergodicity of a simple Markovian stochastic process with space-dependent diffusion coefficient D ( x ). For power-law forms D ( x ) ≃ | x | ^α , this process yields anomalous diffusion of the form 〈 x ^2 ( t )〉 ≃ t ^2/(2− ^α ...
Andrey G Cherstvy +2 more
doaj +1 more source
Avoiding ergodicity and turbulence in R-3 vector fields
, 2003 We show that analytic R-3 vector fields having the property of being transversal to either analytic functions or foliations F-2, or parallel. to a foliation, are free from ergodicity and turbulence.
Campoamor Stursberg, Otto-Rudwig +2 more
core +1 more source
Earthquake Engineering &Structural Dynamics, EarlyView.ABSTRACT This paper illustrates opportunities for the use of simulated ground motions in seismic performance assessment – from seismic hazard, ground‐motion selection, response history analysis, and seismic demand hazard calculation. The illustration is through a comparative analysis with the conventional alternative of observed ground motions.
Vahid Loghman +2 more
wiley +1 more source
Ergodic descriptors of non-ergodic stochastic processes
Journal of The Royal Society Interface, 2022 The stochastic processes underlying the growth and stability of biological and psychological systems reveal themselves when far-from-equilibrium. Far-from-equilibrium, non-ergodicity reigns. Non-ergodicity implies that the average outcome for a group/ensemble (i.e. of representative organisms/minds) is not necessarily a reliable estimate of the average
Madhur Mangalam, Damian G. Kelty-Stephen
openaire +3 more sources
The ergodicity bias in the observed galaxy distribution
, 2010 The spatial distribution of galaxies we observed is subject to the given condition that we, human beings are sitting right in a galaxy-the Milky Way. Thus the ergodicity assumption is questionable in interpretation of the observed galaxy distribution ...
Jun Pan +3 more
core +1 more source
Lost in Translation? Risk‐Adjusting RMSE for Economic Forecast Performance
Journal of Forecasting, EarlyView.ABSTRACT When used for parameter optimization and/or model selection, traditional mean squared error (MSE)–based measures of forecast accuracy often exhibit a weak or even negative correlation with the economic value of return forecasts measured by, for example, the Sharpe ratios of the resulting portfolios.
Lukas Salcher +2 more
wiley +1 more source
Ergodicity of hypoeliptic SDEs driven by fractional Brownian motion [PDF]
, 2009 We demonstrate that stochastic differential equations (SDEs) driven by fractional Brownian motion with Hurst parameter H > 1/2 have similar ergodic properties as SDEs driven by standard Brownian motion.
Hairer, Martin, Pillai, Natesh S.
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