Transition Probabilities
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. JUDD-OFELT ANALYSIS OF Tb3+ AND UPCONVERSION STUDY IN Yb3+-Tb3+ CO-DOPED CALIBO GLASSES
We report on the study of the spectroscopic properties in Ytterbium-Terbium (Yb3+-Tb3+) co-doped calcium lithium borate (CaLiBO) glasses, with the study’s focus being on the upconversion process. Intensity parameters Ωλ for CaLiBO:Tb3+ are determined by the Judd-Ofelt method to be Ω2 = 15.5 × 10-20 cm2, Ω4 = 1.90 × 10-20 cm2 and Ω6 = 3.69 × 10-20 c
Quím. Nova. Publicado em: 2020-02
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2. Application of Markov chains to Standardized Precipitation Index (SPI) in São Francisco River Basin
Resumo Este trabalho objetivou avaliar períodos secos e chuvosos nas sub-regiões da Bacia Hidrográfica do Rio São Francisco (BHSF) utilizando o Índice de Precipitação Padronizado (SPI) e cadeias de Markov. Cada sub-região da BHSF possui características físicas e climáticas específicas, dessa forma foram utilizadas quatro estações pluviométrica
Rev. Ambient. Água. Publicado em: 03/06/2019
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3. Distribution of rainfall probability in the Tapajos River Basin, Amazonia, Brazil
Resumo Estudos sobre a probabilidade de chuvas e suas variações espaço-temporais são importantes para o planejamento de recursos hídricos e otimização do calendário de atividades agrícolas. O presente estudo identifica a ocorrência de chuvas pela cadeia de Markov de primeira ordem (CM) e por dois estados da bacia hidrográfica do rio Tapajós (BHRT
Rev. Ambient. Água. Publicado em: 03/06/2019
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4. HIGH-ORDER MULTIVARIATE MARKOV CHAIN APPLIED IN DOW JONES AND IBOVESPA INDEXES
ABSTRACT In this paper we analyzed the probabilities of transitions of state between Ibovespa and Dow Jones indexes using High-order Multivariate Markov Chain. While the stock market may be profitable, the existence of risks can lead to large losses. A mathematical model capable of considering different sources can aid in decision making. This model can work
Pesqui. Oper.. Publicado em: 09/05/2019
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5. The establishment of the time interval between inspections for a cold standby system with component repair
Abstract The time interval between inspections of cold standby systems is a crucial decision to ensure the appropriated system reliability and the lowest costs possible. This paper presents a model developed to establish the optimal time interval between inspections for a two-unit cold standby system with component repair and subject to periodic inspection,
Prod.. Publicado em: 31/08/2017
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6. Cost-utility analysis of methylphenidate treatment for children and adolescents with ADHD in Brazil
Objective: To perform a cost-utility analysis on the treatment of attention deficit hyperactivity disorder (ADHD) with methylphenidate immediate-release (MPH-IR) in children and adolescents from Brazil. Method: A Markov model was constructed to compare MPH-IR vs. no treatment. A 24-week naturalistic study was conducted to collect transition probabilities a
Rev. Bras. Psiquiatr.. Publicado em: 08/09/2015
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7. Economic evaluation of treatments for chronic hepatitis B
The aim of this study was to conduct a cost-utility study of adefovir, entecavir, interferon alpha, pegylated interferon alpha, lamivudine and tenofovir for chronic hepatitis B in the context of Brazilian Public Health Care System. A systematic review was carried out for efficacy and safety. Another review was performed to collect utility data and transition
Braz J Infect Dis. Publicado em: 2013-08
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8. Desenvolvimento de um modelo para construção de mapas genéticos em autopoliploides, com aplicações em cana-de-açúcar / Development of a model to build genetic maps in autopolyploides, with applications in sugarcane
Autopolyploid species are extremely important in agriculture. However, the complex structure of their genomes is not well understood. Despite all advances in genetic mapping of autotetraploids, the vast majority of the models used for autopolyploid species with high ploidy level, such as sugarcane, are approximations of those used in diploid organisms. Thus,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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9. Avaliação da qualidade de vida e análise de custo-utilidades das terapias renais substitutivas no Brasil
Introduction: chronic renal disease is now a public health problem, which brings great harm to the patient, under the social, economic and quality of life (QOL) and has shown increasing spending for the National Health System (SUS ). Objectives: To assess the quality of life and cost utility analysis of renal replacement therapies. Perform comparison of qual
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2011
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10. Ensaios sobre a economia do câncer de colo de útero : teorias e evidências para o caso de Roraima
Invasive cervical cancer (ICC) is one of the most damaging that affect women, especially in developing countries, where preventive programs (based on the Pap smear) haven¿t achieved effectiveness. HPV vaccines have recently been proposed as primary prevention of ICC. They show good efficacy and safety, but a high cost for its acquisition. Objectives: The ob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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11. Estudo da mobilidade da força de trabalho entre os estados de atividade:: uma modelagem dos padrões de mercado de trabalho urbano do Peru através de Tabelas de Incremento e Decremento
The increased mobility of the urban Peruvian WAP through the states of activity is the product of the implementation of a package of labor reforms whose aim was to generate more jobs, requires supplement period indicators, which account for the market situation work in a given moment in time. Despite the importance of these indicators, do not fully reproduce
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2010
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12. Novel and faster ways for solving semi-markov processes: mathematical and numerical issues
Continuous-time semi-Markov processes (SMP) are important stochastic tools for modeling reliability metrics over time for systems where the future behavior depends on the current and next states as well as on sojourn times. The classical approach for solving the interval transition probabilities of SMP consists of directly applying any general quadrature met
Publicado em: 2009