Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 3
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Développement et ajustement d'un modèle de dynamique des populations structuré en longueur et spatialisé appliqué au stock Nord de merlu (Merluccius merluccius) ArchiMer
Drouineau, Hilaire.
The biology of European hake has been largely studied, however some specific processes of its biology, especially growth and migration, are still poorly known. Those uncertainties have consequences on the quality of the stock assessments and on the stock management by limiting the possibility to assess the effect of spatial management measures. Therefore, we develop an integrated length-structured and spatialised model of population dynamics aiming at improving the estimation of unknown parameters of the population dynamic. The model relies on a state model describing the dynamics of the population and the fishing activity, and on an observation model describing the observation processes and providing a likelihood function. A review of the literature...
Tipo: Text Palavras-chave: Parameters estimation; Migration; Growth; Sensitivity analysis; Likelihood; Spatialised model; Stock assessment; Length structured model; Hake; Estimation de paramètres; Migration; Croissance; Analyse de sensibilité; Maximum de vraisemblance; Modèle spatialisé; Évaluation des stocks; Modèle structuré en longueur; Merlu.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-3710.pdf
Imagem não selecionada

Imprime registro no formato completo
Scorecarding and Heat Mapping: Tools and Concepts for Assessing Strategic Uncertainty AgEcon
Detre, Joshua D.; Briggeman, Brian C.; Boehlje, Michael; Gray, Allan W..
The dramatic changes occurring throughout the agriculture industry are creating new and different uncertainties that result from a turbulent business climate. The objective of this paper is to present a methodology to understand, assess and evaluate, and manage strategic uncertainty. The approach is to present a mental model that frames assessment of strategic uncertainty from a potential and exposure perspective. Scorecarding and heat mapping assessment tools operationalize the mental model. Participants in an executive agribusiness educational workshop applied this mental model and the assessment tools to one of three hypothetical seed companies. The participants then provided an evaluation of the usefulness and effectiveness of uncertainty scorecarding...
Tipo: Journal Article Palavras-chave: Uncertainty; Scorecarding; Strategic uncertainty; Heat mapping; Potential; Exposure; Likelihood; Risk and Uncertainty.
Ano: 2006 URL: http://purl.umn.edu/8207
Imagem não selecionada

Imprime registro no formato completo
QIC program and model selection in GEE analyses AgEcon
Cui, James.
The generalized estimating equation (GEE) approach is a widely used statistical method in the analysis of longitudinal data in clinical and epidemiological studies. It is an extension of the generalized linear model (GLM) method to correlated data such that valid standard errors of the parameter estimates can be drawn. Unlike the GLM method, which is based on the maximum likelihood theory for independent observations, the GEE method is based on the quasilikelihood theory and no assumption is made about the distribution of response observations. Therefore, Akaike’s information criterion, a widely used method for model selection in GLM, is not applicable to GEE directly. However, Pan (Biometrics 2001; 57: 120–125) proposed a model-selection method for GEE...
Tipo: Article Palavras-chave: Qic; Akaike's information criterion; GEE; Likelihood; Model; Quasilikelihood under the independence model criterion; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119269
Registros recuperados: 3
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional