Results 31 to 40 of about 452,503 (268)

ENSO-ASC 1.0.0: ENSO deep learning forecast model with a multivariate air–sea coupler [PDF]

open access: yesGeoscientific Model Development, 2021
The El Niño–Southern Oscillation (ENSO) is an extremely complicated ocean–atmosphere coupling event, the development and decay of which are usually modulated by the energy interactions between multiple physical variables.
B. Mu, B. Qin, S. Yuan
doaj   +1 more source

Fitting multilevel multivariate models with missing data in responses and covariates that may include interactions and non-linear terms [PDF]

open access: yes, 2012
The paper extends existing models for multilevel multivariate data with mixed response types to handle quite general types and patterns of missing data values in a wide range of multilevel generalized linear models.
Browne, William J.   +2 more
core   +2 more sources

Technical note: Changes in cross- and auto-dependence structures in climate projections of daily precipitation and their sensitivity to outliers [PDF]

open access: yesHydrology and Earth System Sciences, 2019
Simulations of regional or global climate models are often used for climate change impact assessment. To eliminate systematic errors, which are inherent to all climate model simulations, a number of post-processing (statistical downscaling) methods have ...
J. Hnilica   +3 more
doaj   +1 more source

Determinação espectroscópica multivariada de glucosamina e condroitina em formulações farmacêuticas Multivariate spectroscopic determination of glucosamine and chondroitin in pharmaceutical formulations

open access: yesQuímica Nova, 2008
The objective of this study was to develop and validate an analytical method for quantification of glucosamine and chondroitin in pharmaceutical formulations. Multivariate calibration combined with infrared spectrophotometry allowed this analysis.
Paula Rossignoli   +4 more
doaj   +1 more source

The Joint Assimilation of Remotely Sensed Leaf Area Index and Surface Soil Moisture into a Land Surface Model

open access: yesRemote Sensing, 2022
This work tests the hypothesis that jointly assimilating satellite observations of leaf area index and surface soil moisture into a land surface model improves the estimation of land vegetation and water variables.
Azbina Rahman   +5 more
doaj   +1 more source

Improved maximum likelihood estimators in a heteroskedastic errors-in-variables model

open access: yes, 2011
This paper develops a bias correction scheme for a multivariate heteroskedastic errors-in-variables model. The applicability of this model is justified in areas such as astrophysics, epidemiology and analytical chemistry, where the variables are subject ...
Alexandre G. Patriota   +14 more
core   +2 more sources

Estimation with Numerical Integration on Sparse Grids [PDF]

open access: yes, 2006
For the estimation of many econometric models, integrals without analytical solutions have to be evaluated. Examples include limited dependent variables and nonlinear panel data models.
Heiss, Florian, Winschel, Viktor
core   +2 more sources

Estimation for the Multivariate Errors-in-Variables Model with Estimated Error Covariance Matrix

open access: yesThe Annals of Statistics, 1984
The authors consider the estimation problem of multivariate errors-in- variables models. Let \(r\times 1\) row vectors \(y_ i\) and \(k\times 1\) row vectors \(x_ i\) satisfy \(y_ i=\beta_ 0+x_ i\beta\), \(i=1,2,...,n\), where \(\beta_ 0\) and \(\beta\) are 1\(\times r\) and \(k\times r\) matrices of parameters, respectively.
Amemiya, Yasuo, Fuller, Wayne A.
openaire   +3 more sources

Cramer-Rao Lower Bound for Point Based Image Registration with Heteroscedastic Error Model for Application in Single Molecule Microscopy

open access: yes, 2015
The Cramer-Rao lower bound for the estimation of the affine transformation parameters in a multivariate heteroscedastic errors-in-variables model is derived.
Cohen, E. A. K., Kim, D., Ober, R. J.
core   +1 more source

Multivariate emulation of computer simulators: model selection and diagnostics with application to a humanitarian relief model [PDF]

open access: yes, 2016
We present a common framework for Bayesian emulation methodologies for multivariate-output simulators, or computer models, that employ either parametric linear models or nonparametric Gaussian processes.
Overstall, Antony M., Woods, David C.
core   +1 more source

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