Results 81 to 90 of about 342,984 (310)
A constructive proof of the Wedderburn-Artin theorem
, 2014 In this short note, we use the idempotent decomposition to give an explicit isomorphism from a semisimple Artinian ring to an external direct sum of finite full matrix rings over division ...
Gao, Sheng
core
European Policy Analysis, EarlyView.ABSTRACT This article addresses a critical issue in evidence‐informed policymaking: the challenge of translating knowledge into policy outputs amidst the complex interplay between research and politics. It discusses the concept of “blocked learning,” where individual‐level learning fails to scale up to organizational and policy levels, thus impeding ...
Thenia Vagionaki
wiley +1 more source
Energy Science &Engineering, EarlyView.ABSTRACT System dynamics uncertainties and cyberattacks pose significant challenges to load frequency control in power systems. This paper presents a data‐driven load frequency control strategy for interconnected multi‐area power systems subject to denial‐of‐service attacks that disrupt both feedforward and feedback communication channels.
Yuhao Chen +4 more
wiley +1 more source
Kriging and Prediction of Nonlinear Functionals
Austrian Journal of Statistics, 2016 The prediction of a nonlinear functional of a random field is studied. The covariance-matching constrained kriging is considered. It is proved that the optimization problem induced by it always has a solution. The proof is constructive and it provides an
Alexander Kukush, István Fazekas
doaj +1 more source
Proof-relevance in Bishop-style constructive mathematics [PDF]
, 2022 Iosif Petrakis
openalex +1 more source
International Journal for Numerical Methods in Fluids, EarlyView.The proposed work implements a direct flux reconstruction method for spatial discretization and a stiffness‐resilient exponential time integration method for temporal discretization on the cube‐sphere grid. A space‐time tensor formalism is employed to provide a general representation in any curvilinear coordinate system. This combination enables highly
Stéphane Gaudreault +6 more
wiley +1 more source
On Bernoulli boundary value problem
Le Matematiche, 2007 We give a constructive proof of the existence and uniqueness of the solution, under certain conditions, by Picard’s iteration. Moreover Newton’s iteration method is considered for the numerical computation of the solution.
Francesco A. Costabile, Annarosa Serpe
doaj
Noncausal AR‐ARCH Model and Its Applications to Financial Time Series
International Journal of Finance &Economics, EarlyView.ABSTRACT We extend the noncausal autoregressive models by introducing noncausality into the variance component, allowing the volatility to depend on future prices as well. We refer to this model as the noncausal AR‐ARCH model, and it enables us to account for shocks arising from market agents who possess more information and engage in forward‐looking ...
Yaosong Zhan +3 more
wiley +1 more source
Uncertain Short‐Run Restrictions and Statistically Identified Structural Vector Autoregressions
Journal of Applied Econometrics, EarlyView.ABSTRACT This study proposes a combination of a statistical identification approach with potentially invalid short‐run zero restrictions. The estimator shrinks towards imposed restrictions and stops shrinkage when the data provide evidence against a restriction.
Sascha A. Keweloh, Shu Wang
wiley +1 more source
Constructive Memory in Truth‐Telling for Reconciliation
Journal of Applied Philosophy, EarlyView.ABSTRACT Truth‐telling has, in diverse contexts, been conceptualised as a vehicle for achieving reconciliation following injustice. As a social and political phenomenon, it involves the communication of narratives grounded in episodic memory. Such narratives may fail to reproduce the details of past events and may even include details that were not ...
Alberto Guerrero‐Velázquez +1 more
wiley +1 more source