Rayleigh Distribution
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Multi-Step-Ahead Spectrum Prediction for Cognitive Radio in Fading Scenarios
Abstract This paper analyzes multi-step-ahead spectrum prediction for Cognitive Radio (CR) systems using several future states. A slot-based scenario is used, and prediction is based on the Support Vector Machine (SVM) algorithm. The aim is to determine whether multi-step-ahead spectrum prediction has gains in terms of reduced channel-switching and increased
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-12
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2. Flow distribution and trends in the Das Velhas River Basin
Resumo Na gestão dos recursos hídricos se deve buscar a harmonização entre as demandas dos usos múltiplos da água e a disponibilidade hídrica, entendendo-se esta como o quantitativo a ser utilizado de forma ambientalmente sustentável. Distribuições de probabilidade de vazões são ferramentas essenciais para avaliar a disponibilidade hídrica. Os o
Rev. Ambient. Água. Publicado em: 03/06/2019
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3. Influence of artificial lights on the orientation of hatchlings of Eretmochelys imbricata in Pernambuco, Brazil
ABSTRACT Sea turtle hatchlings, in natural abiotic conditions, emerge from their nests at night and go directly to the sea, following the moonlight’s reflection in the ocean. Increased human activities such as tourism and artificial lights on the coasts, however, have interfered with the ability of sea turtle neonates to find their correct destination, neg
Zoologia (Curitiba). Publicado em: 19/10/2017
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4. The log-exponentiated generalized gamma regression model with censored data / Modelo de regressão log-gama generalizado exponenciado com dados censurados
In the present study, we propose a regression model using the exponentiated generalized gama (EGG) distribution for censored data, this new distribution is an extension of the generalized gama distribution. The EGG distribution (CORDEIRO et al., 2009) that has four parameters it can model survival data when the risk function is increasing, decreasing, form o
Publicado em: 2010
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5. Contribuições teoricas para o estudo de funções de distribuição correlacionadas em um canal sem fio / Theoretical contributions to the study of correlated distributions funcions of wireless channels
In wireless communications, the multipath fading is modeled by several distributions including Hoyt, Rayleigh, Weibull, Nakagami-m, and Rice. In this thesis, new, exact expressions for the bivariate Hoyt (Nakagami-q) processes with arbitrary correlation in a nonstationary environment are derived. More specifically, the following are obtained: joint probabili
Publicado em: 2009
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6. Caracterização da distribuição de Weibull em ambientes indoor / Characterization of the Weibull distribution in Indoor environments
The literature describes the fast flat fading propagation model in mobile environment as a Rayleigh distribution with different standard deviations which considers only one parameter to describe the channel fading. In the Weibull distribution there are two parameters to be modeled: shape factor and scale factor. The Rayleigh distribution is a particular case
Publicado em: 2008
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7. DYNAMIC ANALYSIS OF A GEOSYNTHETIC REINFORCED EMBANKMENT / ANÁLISE DINÂMICA DE UM ATERRO REFORÇADO COM GEOSSINTÉTICOS
The main objective of this research is to investigate the seismic response of a soil slope reinforced with geosynthetics, located in an active seismic region of Peru. The 10.40m high slope was reinforced with 9 horizontal layers of geosynthetics 10m long. The aspects studied in this work are related to the slope static stability, the dynamic response of the
Publicado em: 2008
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8. Métrica para análise da qualidade de vídeo transmitido em redes sem fio / Metrics to analyze the quality of videos transmitted through wireless networks
The goal of this work is to propose a metric to analyze the quality of videos transmitted through wireless networks. A wireless network is a degenerative means to transmit data given its huge instability, which affects transmitted videos. The present proposal adds a technical network parameter, known as jitter, to clients opinion. For these studies a video w
Publicado em: 2008
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9. Análise de estimadores para canais com desvanecimento rápido e não seletivo em freqüência modelados de acordo com as distribuições K- e n- / Análise de estimadores para canais com desvanecimento rápido e não seletivo em freqüência modelados de acordo com as distribuições K- e n-
Nesta dissertação realizou-se o desenvolvimento e análise de estimadores baseados no Método dos Momentos Estatísticos e na Minimização do Erro Quadrático Médio para os parâmetros das distribuições estatísticas e . Estas distribuições são modelos gerais para caracterização de canais com desvanecimento rápido devido aos múltiplos percursos
Publicado em: 2006
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10. Distribuições e estatisticas de ordem superior para o canal sem fio / Distributions and higher-order statistics for wireless channels
Neste trabalho, uma nova distribuição de probabilidade amplamente geral, a distribuição α −η − κ − µ, é proposta. Esta distribuição contempla como casos particulares várias outras distribuições conhecidas na literatura, tais como Rayleigh, Rice, Nakagami-m, Hoyt, Weibull, α − µ (Gamma Generalizada) _
Publicado em: 2006
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11. Desenvolvimento de um microscópio óptico e magnetoóptico de varredura em campo-próximo / Development of a Magneto-optical Scanning Near-field Optical Microscope (MO-SNOM)
To support nanosciences evolution, there is a strong demand for developing new instrumentation devoted to nano-scale characterization. In this context, the development of the Scanning Near-field Optical Microscope (SNOM) took place. In contrast to traditional optical microscopes, SNOM deals with evanescent electromagnetic radiation and, consequently, the res
Publicado em: 2005
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12. Theoretical innovation and computational experiments in Quantum Monte Carlo / Inovações teoricas e experimentos computacionais em Monte Carlo Quantico
The Hartree-Fock method (HF) is the principal strategy used in theoretical chemistry for electronic structure calculations. Although valuable results can be obtain with HF, this method has deficiencies in the treatment of some systems, which are related mainly with electronic correlation. Several methods were developed, known as "post-Hartree-Fock", in arder
Publicado em: 2005