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Mostrando documentos 11-20 de 25
Joint modeling of continuous proportions and overdispersed counts
(2015-12-16)
Abstract: In the last few years biotechnolgy offers organic substances, defined as elicitors, which activate plant defenses to warding off atack by pathogens and herbivores. Application of this technology in crops induces ...
Monitoring regression models for lifetimes
(2016)
Abstract. Monitoring regression models for lifetimes The current study addresses the monitoring of regression models with response variable having a distribution for lifetimes. Certain aspects of this research have ...
Análisis de factores comunes dinámicos en presencia de procesos de ruido autocorrelacionados
(2020-07-25)
This thesis presents a procedure to build a dynamic factor model in the presence of orthogonal stationary noise-processes. The procedure is based on the Peña-Box model (Peña & Box, 1987), in which the number of observed ...
Monitoreo de perfiles para respuesta discreta agregada
(2020-08-21)
The temporary aggregation of data is a procedure that occurs frequently in various areas and for different reasons, among which are a better handling of high-frequency data or simplicity in the monitoring processes. Many ...
Modelamiento de procesos autorregresivos de umbrales estacionales
(2019-06-28)
Fluctuaciones estacionales frecuentemente se hallan en muchas series de tiempo. En adición, la no linealidad y la relación con otras series de tiempo son comportamientos prominentes de muchas de tales series. En este ...
Modelo Factorial Dinámico TAR
(2007-12)
En este trabajo se presenta un procedimiento para estimar factores comunes en series temporales que presenten comportamientos no-lineales del tipo threshold. Dentro del estudio de series de tiempo, los procesos multivariados ...
Semiparametric smoothing spline to joint mean and variance models with responses from the biparametric exponential family: a bayesian perspective
(Universidad Nacional de Colombia, 2022-01)
Statistical applications need to address an increasing complexity due to new data arising from recent technologies, new phenomenons, and diverse sources of uncertainty. The demand for flexible methods with non-standard ...
Una prueba de rachas para identificar sucesiones markovianas homogéneas de dos estados
(2015-12-11)
Se propone una prueba orientada por los datos para identificar dependencia markoviana positiva de primer orden en una sucesión Bernoulli, basada en una combinación de dos pruebas de rachas: la prueba condicionada de Barton ...
Capability Analysis for Profiles
(2014-02)
Abstract. There are practical situations in which the quality of a process or product can be better characterized by a functional relationship between a response variable and one or more explanatory variables, this is ...
Multiradial matrix covariance functions: characterization and applications
(2014)
All results presented here concern to radial (isotropic) and multiradial (danisotropic) matrix-valued covariance functions. We specify some important properties of matrix-valued covariance functions associated to ...