Survival Data Modeling
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. A new model for describing remission times: the generalized beta-generated Lindley distribution
New generators are required to define wider distributions for modeling real data in survival analysis. To that end we introduce the four-parameter generalized beta-generated Lindley distribution. It has explicit expressions for the ordinary and incomplete moments, mean deviations, generating and quantile functions. We propose a maximum likelihood procedure t
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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2. INFERENCE OF THE MARKET VALUE OF URBAN LOTS FROM THE PERSPECTIVE OF SURVIVAL ANALYSIS. CASE STUDY: CITY OF SÃO CARLOS, SÃO PAULO, BRAZIL
ABSTRACT The survival analysis was originally proposed for data analysis related to time before the occurrence of a specific event of interest and has been widely used in studies of biomedical data (survival analysis), industrial research (reliability analysis) and financial data (credit scoring). In this study, we presented a new approach to modeling the ma
Pesqui. Oper.. Publicado em: 2016-08
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3. Dynamics of competition and survival
Along time, increasing competitiveness is said to have shortened firms' life spans; however, for those who managed to survive, the question relies on what are the best competitive positions. The question is whether firms can sustain a competitive advantage for longer periods. To answer it, this article analyzes the combined performance (profit and growth) tr
BAR, Braz. Adm. Rev.. Publicado em: 2014-03
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4. A distribuição log-logística exponenciada geométrica: dupla ativação / The exponentiated log-logistic geometric distribution: dual activation
In this work, we propose a new distribution with four parameters the so called exponentiated log-logistic geometric distribution based on a double mechanism of activation for modeling lifetime data. For this new distribution, we study the density function, cumulative distribution, survival function and the failure rate function which allows major harzad rate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/09/2012
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5. Modelo logístico generalizado dependente do tempo com fragilidade
Several authors have preferred to model survival data in the presence of covariates through the hazard function, a fact related to its interpretation. The hazard function describes as the instantaneous average of failure changes over time. In this context, one of the most used models is the Coxs model (1972), in which the basic supposition for its use is tha
Publicado em: 2011
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6. Modelagem de nicho em espécies de plantas do Cerrado e distribuição espacial da variabilidade genética / Niche modeling of plants species from the Cerrado and spatial distribution of genetic variability
Ecological and evolutionary factors may explain the patterns of intrapopulation variability across the geographic distribution of a species. More suitable habitats, in ecological terms, allow the survival of greater number of individuals, which increases the genetic variability in the population, while in less suitable habitats, because of smaller population
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2010
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7. Ambiente de inovação :análise multidimensional em uma organização do setor metal-mecânico
Knowing the motivating factors to the development of innovation processes has aroused interest in the area of organizational studies and has played as a challenge to the field of management. To address these markets many organizations have identified the innovation as a factor for survival and competitiveness. Therefore, we sought to determine whether there
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2010
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8. Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii
The main objective of this research was to develop a simulator system of growth and yield for unthinned plantations of Eucalyptus dunnii using different adjustment methods for the Weibull probability density function to describe the forest structure at various ages. The data used in this research came from measurements of 239 plots in E. dunnii stands in the
Publicado em: 2010
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9. As distribuições Kumaraswamy-log-logística e Kumaraswamy-logística / Distributions Kumaraswamy-log-logistic and Kumaraswamy-logistic
In this work, are presented two new probability distributions, obtained from two generalization methods of the log-logistic distribution, with two parameters (LL (?, ?)). The first method described in Marshall e Olkin (1997) turns the new distribution, now with three parameters, called modified log-logistic distribution (LLM(v, ?, ?)). This distribution is m
Publicado em: 2010
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10. Uma investigação dos fatores econômicos que influenciaram na sobrevida de micro e pequenas empresas do estado do Ceará no período de 2002-2006 / Survival Analysis; Micro and Small Enterprises; Modeling Survival Data, Data Characterization Survival; parametric Estimator KAPLAN-MEIER
The main objective of this research is to explore economics issues that may induce impact on lifetime of small businesses during 2002 to 2006. The group of enterprises studied was selected from database of taxpayers recorded at fiscal authority of State of Ceará. To do that, the methodology was focused on a branch of statistics which deals with survival ana
Publicado em: 2009
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11. Modelagem e anÃlise de fatores influentes na gravidez na adolescÃncia na microrregiÃo de Campo Belo-MG / Modeling and analysis of factors influencing adolescent pregnancy in the micro region of Campo Belo-MG
The adolescence is a transitional period that occurs between childhood and adulthood which multifaceted nature cannot be measured, at the same time, by any definition alone. According to the World Health Organization, it is âan evolutionary stage characterized by a rapid biological (i.e. pubertal), social and psychological development, which occurs in betwe
Publicado em: 2009
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12. O relacionamento entre as farmácias e drogarias e seu distribuidor: uma modelagem à luz da teoria do comprometimento-confiança do marketing de relacionamento / The relationship between the pharmacies and drugstores, and its distributor: a modeling in the the light of the commitment-trust theory of relationship marketing
The relationship marketing contributes for the survival of companies and for the business success. Its goal is to develop deep, lasting and mutually satisfactory relationships between suppliers and customers. The relationship marketing is associated with a strategic perspective, with the company positioning and with the necessity of relationship of the compa
Publicado em: 2009