Results 141 to 150 of about 6,804 (227)

The Mathematical History Behind the Granger–Johansen Representation Theorem

open access: yesOxford Bulletin of Economics and Statistics, Volume 88, Issue 4, Page 587-602, August 2026.
ABSTRACT When can a vector time series that is integrated once (i.e., becomes stationary after taking first differences) be described in error correction form? The answer to this is provided by the Granger–Johansen representation theorem. From a mathematical point of view, the theorem can be viewed as essentially a statement concerning the geometry of ...
Johannes M. Schumacher
wiley   +1 more source

Confidence Intervals for Price Discovery

open access: yesOxford Bulletin of Economics and Statistics, Volume 88, Issue 4, Page 742-764, August 2026.
ABSTRACT This paper discusses asymptotic and bootstrap confidence intervals for multivariate permanent‐transitory decompositions of cointegrated vector autoregressive I(1) systems, with a focus on price discovery. Alternative estimators of the permanent components are compared in terms of efficiency also under separable linear restrictions on the ...
Heino Bohn Nielsen   +2 more
wiley   +1 more source

The Wells–Riley Model Revisited II: Parameter Uncertainty and Population Heterogeneity

open access: yesRisk Analysis, Volume 46, Issue 8, August 2026.
ABSTRACT In this work, we revisit the Wells–Riley model, which has been widely used to estimate airborne infection risk in indoor settings. In particular, we consider a probabilistic (i.e., “stochastic”) framework of the Wells–Riley model which allows one to quantify infection risk in terms of the per‐capita probability of infection for each ...
Marcus Marshall   +7 more
wiley   +1 more source

Prediction of the outlet temperature of the converter dry-type dust removal evaporative cooler based on LAOA-SCN

open access: yesMetalurgija
In the converter dry-type dust removal system, controlling the outlet temperature directly impacts the efficiency of flue gas treatment. To ensure high-precision control of the outlet temperature, this study utilized improved Arithmetic Optimization ...
Y. K. Wang, C. Y. Shi, Z. H. Bao
doaj  

A Hierarchical Deep Symbolic AI Method for Closed‐Form, Interpretable Constitutive Modeling

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 14, 30 July 2026.
ABSTRACT Recent advances in advanced manufacturing have enabled the development of multifunctional materials such as soft composites, whose complex nonlinear behaviors demand accurate and interpretable constitutive modeling. Traditional phenomenological formulations rely heavily on assumed functional forms and expert intuition, requiring extensive ...
Haozhe Yu   +3 more
wiley   +1 more source

Atmospheric Noise Forcing Increases Multiyear El Niño Events

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Despite their pronounced climate impacts, the physical processes that control the frequency of multiyear El Niño events remain incompletely understood. Using an Interactive Ensemble (IE) coupling strategy, we find that atmospheric noise forcing plays an important role in modulating the frequency of multiyear El Niño events.
Keqing Bai   +4 more
wiley   +1 more source

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