Results 51 to 60 of about 184,798 (233)

Likelihood Estimation for Stochastic Differential Equations with Mixed Effects

Scandinavian Journal of Statistics, EarlyView.
ABSTRACT Stochastic differential equations provide a powerful tool for modelling dynamic phenomena affected by random noise. When time series are observed for several experimental units, it is often the case that some of the parameters vary between the individual experimental units.
Fernando Baltazar‐Larios, Mogens Bladt, Michael Sørensen   +2 more
wiley   +1 more source

Experimentos com um modelo unidimensional de balanço de energia

Revista Brasileira de Ensino de Física
Modelos unidimensionais, apesar de limitados, são excelentes ferramentas para estudar princípios básicos de algum sistema físico. Neste documento, as equações do modelo unidimensional de balanço de energia para o planeta Terra são descritas e ...
Mateus da Silva Teixeira
doaj   +1 more source

A Collection of Mathematical and Statistical Routines in FORTRAN 90

Journal of Statistical Software, 2004
The purpose of this brief note is to bring to the attention of readers a collection of Fortran routines which may be useful to readers of this journal. The author collected the routines over many years, starting while acting as a statistical consultant ...
Alan J. Miller
doaj   +1 more source

The Multiscale Non‐Gaussian Statistics of Free‐Running 1000‐Member General Circulation Model Ensembles

Atmospheric Science Letters, Volume 27, Issue 6, June 2026.
This study investigates the multiscale evolution of forecast distributions using 1000‐member global circulation model ensembles. Initially different distributions converge to the same time‐varying equilibrium distribution, and the equilibration time scale noticeably exceeds the variance saturation time. Prior to equilibration, the forecast distribution
Man‐Yau Chan, Hristo G. Chipilski, Jack Schwartz, Max Albrecht, Aiden Ridgway, Saurav Dey Shuvo   +5 more
wiley   +1 more source

Highly parallel drift-kinetic semi-Lagrangian simulations in Python [PDF]

ESAIM: Proceedings and Surveys
This paper describes PyGyro, a parallel 4D drift-kinetic code which implements backward semi-Lagrangian methods combined with field-aligned interpolation and time-splitting.
Bourne Emily, Güçlü Yaman
doaj   +1 more source

Validating Numerical Simulations to Support Experimental Testing of MRI Gradient‐Induced Heating of Passive Implants

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3584-3593, June 2026.
ABSTRACT Purpose Numerical simulations can be adopted to aid the evaluation of the interaction between switched gradient fields and metallic implants and estimate the possible temperature increase. Anyway, an analysis of the consistency of their prediction with experiments is lacking, differently from what can be found for exposure to radiofrequency ...
Umberto Zanovello, Alessandro Arduino, Luca Zilberti, Gregor Schaefers, Martin Halaj, Oriano Bottauscio   +5 more
wiley   +1 more source

Especulação sobre a taxa de infecção da difteria no Modelo Estocástico Simples de Epidemia Speculation on the diphtheria infection in the Simples Stochastic Epidemic Model

Revista de Saúde Pública, 1984
Com base em um programa em linguagem Fortran, utilizando a técnica de simulação em computador e através das pressuposições do Modelo Estocástico Simples de Epidemia, é estabelecida uma conjectura a respeito de valores para a taxa de infecção para a ...
Marco A.S. Lavrador, Odécio Sanches
doaj   +1 more source

AD in Fortran, Part 2: Implementation via Prepreprocessor [PDF]

, 2012
We describe an implementation of the Farfel Fortran AD extensions. These extensions integrate forward and reverse AD directly into the programming model, with attendant benefits to flexibility, modularity, and ease of use.
Pearlmutter, Barak A., Radul, Alexey, Siskind, Jeffrey Mark   +2 more
core   +2 more sources

Seismic imaging of the critical zone of dolerite dykes at Cap Fréhel in Brittany (France)

Near Surface Geophysics, Volume 24, Issue 3, Page 262-288, June 2026.
Abstract In June 2023, we measured ten near‐surface seismic profiles to image the critical zone of dolerite (diabase) dykes that cut the sandstone at Cap Fréhel in Brittany (France). Seismic ray tracing and inversion are used to determine the thickness of the regolith layer from first‐arrival P‐wave traveltimes.
M. Zillmer, F. Masson, H. Rutt, A.‐D. Schmitt, F. Chabaux   +4 more
wiley   +1 more source

Porting marine ecosystem model spin-up using transport matrices to GPUs [PDF]

Geoscientific Model Development, 2013
We have ported an implementation of the spin-up for marine ecosystem models based on transport matrices to graphics processing units (GPUs). The original implementation was designed for distributed-memory architectures and uses the Portable, Extensible ...
E. Siewertsen, J. Piwonski, T. Slawig
doaj   +1 more source