Results 21 to 30 of about 1,370,774 (268)

Curvas de crescimento na produção animal Growth curves in animal production

open access: yesRevista Brasileira de Zootecnia, 2005
Foram discutidas as propriedades de sete modelos não-lineares, considerando-se o ajuste de curvas de crescimento na produção animal. Os modelos utilizados: Brody, Richards, Von Bertalanffy e duas alternativas de Gompertz e de Logístico foram ajustados ...
Alfredo Ribeiro de Freitas
doaj   +1 more source

Nonlinear Observer Design for a Nonlinear Cable/String FEM Model using Contraction Theory [PDF]

open access: yesModeling, Identification and Control, 2004
Contraction theory is a recently developed nonlinear analysis tool which may be useful for solving a variety of nonlinear control problems. In this paper, using Contraction theory, a nonlinear observer is designed for a general nonlinear cable/ string ...
Yilmaz Türkyilmaz, Olav Egeland
doaj   +1 more source

Families of Rational and Semirational Solutions of the Partial Reverse Space-Time Nonlocal Mel′nikov Equation

open access: yesComplexity, 2020
Exact periodic and localized solutions of a nonlocal Mel′nikov equation are derived by the Hirota bilinear method. Many conventional nonlocal operators involve integration over a spatial or temporal domain.
Wei Liu   +3 more
doaj   +1 more source

Estimation of growth parameters in Brahman cattle from Mexico

open access: yesJournal of Agriculture and Rural Development in the Tropics and Subtropics, 2023
The objectives were to evaluate non-linear models (NLM) to define the growth curve of Brahman cattle in Mexico. The database was derived from weight development control, with live weight measurements (150,932 in females and 286,804 in males) taken in the
Joel Domínguez-Viveros
doaj   +1 more source

Qualitative response models: A survey of methodology and illustrative applications [PDF]

open access: yesEkonomski Anali, 2007
This paper introduces econometric modeling with discrete (categorical) dependent variables. Such models, commonly referred to as qualitative response (QR) models, have become a standard tool of microeconometric analysis.
Nojković Aleksandra
doaj   +1 more source

Evaluating Cardinal temperature for seed germination rate of Salvia spp [PDF]

open access: yesعلوم و فناوری بذر ایران, 2014
Evaluating of an appropriate model is critical for quantifying the response of germination rate to temperature and determination of cardinal temperatures.
سارا طهماسبی گوجگی   +4 more
doaj  

Nonlinear analysis of spacecraft thermal models [PDF]

open access: yes, 2010
We study the differential equations of lumped-parameter models of spacecraft thermal control. Firstly, we consider a satellite model consisting of two isothermal parts (nodes): an outer part that absorbs heat from the environment as radiation of various ...
A. Berman   +23 more
core   +1 more source

Model Selection in Threshold Models [PDF]

open access: yes, 2004
This paper considers information criteria as model evaluation tools for nonlinear threshold models. Results concerning the consistency of information criteria in selecting the lag order of linear autoregressive models are extended to nonlinear ...
Kapetanios, George
core   +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.
Hothorn, Torsten   +2 more
core   +1 more source

Analog Computing Simulations and the Production of Theoretical Evidence in Economic Dynamics

open access: yesŒconomia, 2020
This article intends to bring wider attention to the implementation of the electro-analog simulation technique in economic dynamics during the 1950s and the early 1960s. The paper first discusses the main characteristics of the approach.
Alain Raybaut
doaj   +1 more source

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