Empirical Characteristic Function
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Channel Characteristics for Fixed and Portable DTV Reception in a Single Frequency Network
Abstract This paper presents the propagation channel characteristics of a digital TV single-frequency network (SFN) obtained by carrying out field measurements using two synchronized transmitters. The measurements are performed at 31 reception points using both a directive reception antenna, which is typical of fixed reception scenarios, and an omnidirection
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
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2. The effect of hot multistage drawing on molecular structure and optical properties of polyethylene terephthalate fibers
In this work, mechanical and structural parameters related to the optical properties of polyethylene terephthalate (PET) fibers drawn at hot multistage have been investigated. The changes in optical parameters upon changing draw ratio are used to obtain the mechanical orientation factors
and , various orientation functions f2(θ), f4 Materials Research. Publicado em: 17/07/2012
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3. Estudo do jateamento em solos argilosos e sua aplicação à engenharia de fundações offshore / Study of water jets in clay and its application to offshore foundation engineering design
Most of all petroleum produced in Brazil is encountered in marine deposits where the water depth may exceed 1000 meters. Recent discoveries of new offshore oil fields have motivated studies in this area designed to develop new techniques applied to oil exploration. For the extraction of oil deposits floating platforms are commonly used, supported by anchorag
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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4. Indices of movement behaviour: conceptual background, effects of scale and location errors
A fundamental step in the emerging Movement Theory is the description of movement paths, and the identification of its proximate and ultimate drivers. The most common characteristic used to describe and analyze movement paths is its tortuosity, and a variety of tortuosity indices have been proposed in different theoretical or empirical contexts. Here we revi
Zoologia (Curitiba). Publicado em: 2010-10
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5. A ampliação do tempo escolar em propostas de educação pública integral / The increase in the school period in proposals of full-time public education
The increase of classroom time by means of the enacting of the proposals of full-time school period has been growing in public schools in Brazil. This paper, inserted in the Line of Cultural Research and Education Processes, has as its supposition that the change in the understanding and organization of the period is an essential part of a proposal of full t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/05/2009
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6. Estimação de modelos de duração condicional estocástica por meio da função característica empírica / Estimation of stochastic conditional duration models by means of the empirical characteristic function.
We propose the use of the empirical characteristic function (ECF) method to estimate the parameters of the stochastic conditional duration (SCD) model. In order to estimate the latent variables we propose the use of three alternatives: a Kalman filter, a filter based on numerical integration (quadrature) and a filter based on the 4th-order Gram-Charlier expa
Publicado em: 2008
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7. Different schematic eyes and their accuracy to the in vivo eye: a quantitative comparison study
Current ophthalmic technology allows the manipulation of eye components, such as anterior cornea and lens, of the human eye with a considerable precision and customization. This technology opens up the possibility of exploiting some characteristics of the eye in order to improve the methods of correcting optical aberrations. Moreover, product development and
Brazilian Journal of Physics. Publicado em: 2007-06
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8. Aplicação de um procedimento usando preferência declarada para a estimativa do valor do tempo de viagem de motoristas em uma escolha entre rotas rodoviárias pedagiadas e não pedagiadas. / Application of a procedure using stated preference for value of travel time estimation in a choice context involving tolled and non-tolled routes.
This dissertation is based on the application of an empirical procedure using stated preference techniques for the estimation of the value of travel time for drivers in regional trips, in the context of a choice between tolled and non-tolled routes. It first reviews the theoretical and the empirical approaches for the valuation of travel time and then presen
Publicado em: 2007
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9. Construção de um índice de cointegração e utilização do modelo de regimes Markovianos de conversão para a identificação de risco e retorno: evidência a partir de ações na Bolsa de Valores de São Paulo
One of the most popular subjects in finance is about the search and the learning of the securities return generation process and originate with the publication of Bacheliers thesis, in 1900. In 1978, Jensen affirmed that, any strategy of business, that produces economic profits in a consistent way, discounted the risk, for a sufficient long period, observing
Publicado em: 2006
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10. MODELOS ESTOCÁSTICOS PARA A VOLATILIDADE DO MERCADO DE AÇÕES BRASILEIRO / STOCHASTIC MODELS FOR THE BRAZILIAN STOCK MARKET VOLATILITY
The volatility of a financial time series is a key variable in the modeling of the financial markets. It controls the risk measure associated with the dynamics of price of a financial asset and also affects the rational price of derivative products. The volatility of a financial asset is a statistical quantity that describes the characteristic magnitude of p
Publicado em: 2004
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11. Sensitivity and specificity of pulse detection using a new deconvolution method
Quantifying pulsatile secretion from serial hormone concentration measurements (deconvolution analysis) requires automated, objective, and accurate detection of pulse times to ensure valid estimation of secretion and elimination parameters. Lack of validated pulse identification constitutes a major deficiency in the deconvolution field, because individual pu
American Physiological Society.