Results 21 to 30 of about 430,734 (311)

A NONLINEAR MODEL FOR VASOCONSTRICTION [PDF]

open access: yesIFAC Proceedings Volumes, 2006
Abstract The control of blood pressure is a complex mixture of neural, hormonal and intrinsic interactions at the level of the heart, kidney and blood vessels. While experimental approaches to understanding these interactions remain useful, it remains difficult to conduct experiments to quantify these interactions as the number of parameters ...
Ringwood, John   +3 more
openaire   +2 more sources

acebayes: An R Package for Bayesian Optimal Design of Experiments via Approximate Coordinate Exchange

open access: yesJournal of Statistical Software, 2020
We describe the R package acebayes and demonstrate its use to find Bayesian optimal experimental designs. A decision-theoretic approach is adopted, with the optimal design maximizing an expected utility.
Antony M. Overstall   +2 more
doaj   +1 more source

Comparison of four nonlinear growth models in Creole chickens of Mexico

open access: yesPoultry Science, 2020
Animal growth is a complex and dynamic process that involves physiological and morphological changes from hatching to maturity. It is defined as the increase in body size per time unit.
Analy Mata-Estrada   +7 more
doaj   +1 more source

A Nonlinear Population Model

open access: yes, 2023
This paper considers a nonlinear model for population dynamics with age structure. The fertility rate with respect to age is non constant and has the form proposed by . Moreover, its multiplicative structure and the multiplicative structure of mortality makes the model separable.
Dragos-Patru Covei   +2 more
openaire   +2 more sources

A New Three-Step Root-Finding Numerical Method and Its Fractal Global Behavior

open access: yesFractal and Fractional, 2021
There is an increasing demand for numerical methods to obtain accurate approximate solutions for nonlinear models based upon polynomials and transcendental equations under both single and multivariate variables. Keeping in mind the high demand within the
Asifa Tassaddiq   +5 more
doaj   +1 more source

Modeling of the height-diameter relationship in eucalyptus in integrated crop-livestock systems

open access: yesPesquisa Agropecuária Brasileira, 2022
The objective of this work was to compare the height-diameter relationship, described by nonlinear biological models, in Eucalyptus benthamii in monoculture forestry and in three different integrated crop-livestock systems (ICLS): crop-forestry ...
Silvano Kruchelski   +6 more
doaj   +1 more source

Nonlinear Error Correction Models [PDF]

open access: yes, 2002
The relationship between cointegration and error correction (EC) models is well characterized in a linear context, but the extension to the nonlinear context is still a challenge.
Escribano, Álvaro, Mira, Santiago
core   +1 more source

Temperature-Dependent Development Models Describing the Effects of Temperature on the Development of the Fall Armyworm Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

open access: yesInsects, 2022
The fall armyworm Spodoptera frugiperda (J.E. Smith) is an economically important pest that recently invaded Africa and Asia; however, information regarding its biological capacity to establish itself in newly invaded environments is largely unknown.
Matabaro Joseph Malekera   +5 more
doaj   +1 more source

Comparison of Nonlinear Growth Models to Estimate Growth Curves in Kivircik Sheep under a Semi-Intensive Production System

open access: yesAnimals, 2023
The Kivircik is an indigenous sheep breed from Turkey, and it has superior meat quality compared to other indigenous breeds. Therefore, farmers prioritize Kivircik lamb fattening instead of milk production.
Nursen Ozturk   +4 more
doaj   +1 more source

Boosting Techniques for Nonlinear Time Series Models [PDF]

open access: yes, 2010
Many of the popular nonlinear time series models require a priori the choice of parametric functions which are assumed to be appropriate in specific applications.
Gerhard Tutz   +5 more
core   +1 more source

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