Results 41 to 50 of about 2,222 (176)

The role of identification in data‐driven policy iteration: A system theoretic study

International Journal of Robust and Nonlinear Control, EarlyView.
Abstract The goal of this article is to study fundamental mechanisms behind so‐called indirect and direct data‐driven control for unknown systems. Specifically, we consider policy iteration applied to the linear quadratic regulator problem. Two iterative procedures, where data collected from the system are repeatedly used to compute new estimates of ...
Bowen Song, Andrea Iannelli
wiley   +1 more source

Discriminant validity and interrelations of conceptual and procedural knowledge in fractions and algebra: Evidence from confirmatory factor analysis

British Journal of Educational Psychology, EarlyView.
Abstract Background Conceptual and procedural knowledge are two distinct types of mathematical knowledge. Measuring them with sufficient discriminant validity is challenging because they are typically highly correlated. Prior studies have demonstrated discriminant validity of paper‐and‐pencil measures separately for fractions and algebra.
Michael D'Erchie, Claire L. Forsmann, Michael Schneider, Andreas Obersteiner   +3 more
wiley   +1 more source

High-precision computations of divergent asymptotic series and homoclinic phenomena [PDF]

, 2008
We study asymptotic expansions for the exponentially small splitting of separatrices of area preserving maps combining analytical and numerical points of view.
Carles Simó, Vassili Gelfreich, Simó i Torres, Carles, Gelfreich, Vassili   +3 more
core   +1 more source

A tutorial for understanding SEM using R: Where do all the numbers come from?

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Structural equation modeling (SEM) is often seen as a complex and difficult method, especially for those who want to understand how the numbers in SEM software output are actually computed. Although many open‐source SEM tools are now available—especially in the R programming environment—looking into their source code to understand the ...
Yves Rosseel, Marc Vidal
wiley   +1 more source

On the Random Wave Conjecture for Dihedral Maaß Forms [PDF]

, 2020
We prove two results on arithmetic quantum chaos for dihedral Maaß forms, both of which are manifestations of Berry’s random wave conjecture: Planck scale mass equidistribution and an asymptotic formula for the fourth moment.
Khan, R, Khan, Rizwanur, Humphries, Peter, Humphries, P   +3 more
core   +1 more source

A survey on t-core partitions [PDF]

, 2022
$t$-core partitions have played important roles in the theory of partitions and related areas. In this survey, we briefly summarize interesting and important results on $t$-cores from classical results like how to obtain a generating function to recent
Hyunsoo Cho, Hayan Nam, Jaebum Sohn, Byungchan Kim, Kim, Byungchan, Sohn, Jaebum, Cho, Hyunsoo, Nam, Hayan   +7 more
core   +1 more source

An extension of the basic local independence model to multiple observed classifications

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The basic local independence model (BLIM) is appropriate in situations where populations do not differ in the probabilities of the knowledge states and the probabilities of careless errors and lucky guesses of the items. In some situations, this is not the case. This work introduces the multiple observed classification local independence model
Pasquale Anselmi, Debora de Chiusole, Egidio Robusto, Alice Bacherini, Giulia Balboni, Andrea Brancaccio, Ottavia M. Epifania, Noemi Mazzoni, Luca Stefanutti   +8 more
wiley   +1 more source

Asymptotics for multilinear averages of multiplicative functions [PDF]

, 2016
International audienceA celebrated result of Hal\'asz describes the asymptotic behavior of the arithmetic mean of an arbitrary multiplicative function with values on the unit disc.
Host, Bernard, Frantzikinakis, Nikos
core   +1 more source

Reliability measures in knowledge structure theory

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract In knowledge structure theory (KST) framework, this study evaluates the reliability of knowledge state estimation by introducing two key measures: the expected accuracy rate and the expected discrepancy. The accuracy rate quantifies the likelihood that the estimated knowledge state aligns with the true state, while the expected discrepancy ...
Debora de Chiusole, Andrea Spoto, Umberto Granziol, Luca Stefanutti   +3 more
wiley   +1 more source

Numeryczne Modelowanie Procesów Fizycznych

Engineering Transactions, 1961
Many physical processes are most conventiently described by partial differential equations relating the rates of change of the dependent variables to their space distributions.
J.R.M. Radok
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