Time Series Models
Mostrando 1-12 de 317 artigos, teses e dissertações.
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1. Return to work after severe traumatic brain injury: further investigation of the role of personality changes
Objective: Longitudinal measurement invariance analyses are an important way to assess a test’s ability to estimate the underlying construct over time, ensuring that cognitive scores across visits represent a similar underlying construct, and that changes in test performance are attributable to individual change in cognitive abilities. We aimed to evaluat
Braz. J. Psychiatry. Publicado em: 2021-06
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2. Ditching candidate gene association studies: lessons from psychiatric genetics
Objective: Longitudinal measurement invariance analyses are an important way to assess a test’s ability to estimate the underlying construct over time, ensuring that cognitive scores across visits represent a similar underlying construct, and that changes in test performance are attributable to individual change in cognitive abilities. We aimed to evaluat
Braz. J. Psychiatry. Publicado em: 2021-06
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3. Longitudinal measurement invariance of neuropsychological tests in a diverse sample from the ELSA-Brasil study
Objective: Longitudinal measurement invariance analyses are an important way to assess a test’s ability to estimate the underlying construct over time, ensuring that cognitive scores across visits represent a similar underlying construct, and that changes in test performance are attributable to individual change in cognitive abilities. We aimed to evaluat
Braz. J. Psychiatry. Publicado em: 2021-06
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4. Liquid-phase RTD studies in a flotation column: an analysis between tanks-in-series and axial dispersion models
Abstract The objective of the present study is to evaluate the fluid dynamics of a flotation column (2" in diameter and 6 m in height) based on gas hold-up measurements and, in particular, by applying the liquid-phase RTD (residence time distribution) technique. Additionally, a comparative study is performed between different methodologies used to determine
REM, Int. Eng. J.. Publicado em: 2021-01
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5. Mortality Trends from Cardiovascular Diseases in the State of Bahia, Brazil, between 2000 and 2015
Abstract Background: Mortality from cardiovascular diseases has reduced in Brazil in recent decades, but this phenomenon is not clear in the northeast region of the country. Objectives: To describe the mortality trends from cardiovascular disease in Bahia from 2000-2015, in total population and by sex and age groups, and by specific causes (ischemic heart
Int. J. Cardiovasc. Sci.. Publicado em: 2020-12
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6. Sustained reduction of healthcare-associated infections after the introduction of a bundle for prevention of ventilator-associated pneumonia in medical-surgical intensive care units
Abstract Background Infection control interventions can be erroneously interpreted if outcomes are assessed in short periods. Also, statistical methods usually applied to compare outcomes before and after interventions are not appropriate for analyzing time series. Aims To analyze the impact of a bundle directed at reducing the incidence of ventilator-asso
Braz J Infect Dis. Publicado em: 2020-10
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7. Selecting “the best” nonstationary Generalized Extreme Value (GEV) distribution: on the influence of different numbers of GEV-models
ABSTRACT The selection of an appropriate nonstationary Generalized Extreme Value (GEV) distribution is frequently based on methods, such as Akaike information criterion (AIC), second-order Akaike information criterion (AICc), Bayesian information criterion (BIC) and likelihood ratio test (LRT). Since these methods compare all GEV-models considered within a s
Bragantia. Publicado em: 13/12/2019
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8. Tendência de AIDS no grupo etário de 50 anos e mais no período anterior e posterior à introdução de medicamentos para disfunção erétil: Brasil, 1990 a 2003
Resumo Objetivo Descrever o comportamento da incidência de Aids no grupo etário de 50 anos e mais, no Brasil e suas macrorregiões, no período de 1990 a 2003, analisando o momento anterior e posterior à introdução dos medicamentos para disfunção erétil no país, em 1998. Procedimentos metodológicos Realizou-se estudo ecológico, através de an�
Rev. bras. geriatr. gerontol.. Publicado em: 13/12/2019
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9. Trends in morbidity and mortality from COPD in Brazil, 2000 to 2016
RESUMO Objetivo: Examinar as tendências da mortalidade global da DPOC e as tendências da morbidade e mortalidade hospitalar da doença no Brasil, além de validar modelos preditivos. Métodos: Estudo de base populacional com análise de séries temporais de dados sobre morbidade e mortalidade específicas em indivíduos com idade ≥ 40 anos, extraídos
J. bras. pneumol.. Publicado em: 25/11/2019
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10. Modeling hourly air temperature based on internationally agreed times and the daily minimum temperature
RESUMO Existem áreas que exigem conhecimento da variação da temperatura do ar ao longo do dia, como previsão de doenças ou cálculo de horas de frio. Porém, nem sempre há estações meteorológicas automáticas próximas para observar esta variável. Nesse sentido, modelos que descrevem a variação temporal diária da temperatura do ar podem ser util
Rev. bras. eng. agríc. ambient.. Publicado em: 14/10/2019
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11. ON THE RECOVERY OF TEMPORAL VARIATIONS OF GEOID HEIGHTS DETERMINED WITH THE USE OF GGMS BASED ON SST-HL DATA FROM NON-DEDICATED GRAVITY SATELLITE MISSIONS
Abstract Over 15 years the Gravity Recovery and Climate Experiment (GRACE) had considerably contributed to the determination of temporal variations of geoid heights. In May 2018, GRACE Follow-On (GRACE-FO) was launched. The aim of this contribution is to assess the suitability of data from non-dedicated gravity satellite missions (N-DGSMs) for the determinat
Bol. Ciênc. Geod.. Publicado em: 14/10/2019
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12. Spectral analysis in determining water quality sampling intervals
RESUMO Para gerar séries históricas de qualidade da água mais representativas desenvolvem-se técnicas de monitoramento em tempo real. Contudo, estas técnicas possuem obstáculos quanto ao uso: alto custo, dificuldades de instalação, manutenção e calibração dos equipamentos. Uma alternativa seria o chamado monitoramento da qualidade da água em tem
RBRH. Publicado em: 07/10/2019