Power Estimation
Mostrando 13-24 de 149 artigos, teses e dissertações.
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13. Modeling and mapping basal area of Pinus taeda L. plantation using airborne LiDAR data
ABSTRACT Basal area (BA) is a good predictor of timber stand volume and forest growth. This study developed predictive models using field and airborne LiDAR (Light Detection and Ranging) data for estimation of basal area in Pinus taeda plantation in south Brazil. In the field, BA was collected from conventional forest inventory plots. Multiple linear regress
An. Acad. Bras. Ciênc.. Publicado em: 14/08/2017
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14. Maize dry matter production and macronutrient extraction model as a new approach for fertilizer rate estimation
ABSTRACT Decision support for nutrient application remains an enigma if based on soil nutrient analysis. If the crop could be used as an auxiliary indicator, the plant nutrient status during different growth stages could complement the soil test, improving the fertilizer recommendation. Nutrient absorption and partitioning in the plant are here studied and d
An. Acad. Bras. Ciênc.. Publicado em: 22/05/2017
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15. Estimation of cardiovascular risk and detection of subclinical carotid atheromatosis in patients with diabetes without a history of cardiovascular disease
ABSTRACT Objectives Cardiovascular risk estimated by several scores in patients with diabetes mellitus without a cardiovascular disease history and the association with carotid atherosclerotic plaque (CAP) were the aims of this study. Materials and methods Cardiovascular risk was calculate using United Kingdom Prospective Diabetes Study (UKPDS) risk engi
Arch. Endocrinol. Metab.. Publicado em: 13/02/2017
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16. Estimation Uncertainties in the Optical Signal-to-Noise Ratio Network Optimization
In this work, we investigate the effects of estimation uncertainties in the optimization of the optical signal-to-noise ratio (OSNR) at the wavelength division multiplexing (WDM) optical networks. The OSNR optimization increases the network throughput and energy efficiency and it enables to minimize the number of retransmissions by higher layers. The OSNR op
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-03
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17. Comparison of the Incident Solar Energy and Battery Storage in a 3U CubeSat Satellite for Different Orientation Scenarios
ABSTRACT In CubeSats, because the size is limited, the estimation of the incident solar energy according to the orbital parameters and satellite attitude is more critical for the design process of the electrical power system. This estimation is helpful either for sizing of the power sources and energy storage or for defining the operation modes of the CubeSa
J. Aerosp. Technol. Manag.. Publicado em: 2016-03
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18. Biomass estimation of Triplectides egleri Sattler (Trichoptera, Leptoceridae) in a stream at Ducke Reserve, Central Amazonia
ABSTRACT Biomass is a fundamental measure for understanding the structure and functioning (e.g. fluxes of energy and nutrients in the food chain) of aquatic ecosystems. We aim to provide predictive models to estimate the biomass of Triplectides egleri Sattler, 1963, in a stream in Central Amazonia, based on body and case dimensions. We used body length, head
Rev. Bras. entomol.. Publicado em: 2015-12
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19. Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding
In this paper the operator bias in the measurement process of arc efficiency in stationary direct current electrode negative gas tungsten arc welding is discussed. An experimental study involving 15 operators (enough to reach statistical significance) has been carried out with the purpose to estimate the arc efficiency from a specific procedure for calorimet
Soldag. insp.. Publicado em: 2015-03
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20. 2D upper bound analysis of ECAE through 2θ-dies for a range of channel angles
Equal Channel Angular Extrusion (ECAE), sometimes referred to as Equal Channel Angular Pressing (ECAP), is a Severe Plastic Deformation technique. However the energy-power parameters of ECAE have not been fully addressed in previous known publications. The present article is focused on the punching pressure, accumulated plastic strain, and dead metal zone ge
Mat. Res.. Publicado em: 26/10/2014
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21. Estimation of dry mass of caddisflies Phylloicus elektoros (Trichoptera: Calamoceratidae) in a Central Amazon stream
Aquatic invertebrate biomass estimations are often important in ecological and biological studies. Biomass may be determined by regression models between body and case dimensions and dry mass. Using linear, exponential and power regressions we analyzed the relationship between body and case dimensions and the biomass of Phylloicus elektoros Prather, 2003. Fu
Zoologia (Curitiba). Publicado em: 2014-08
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22. Architecture for ES Receiver Systems Targeted at Commercial Wireless Communications
ABSTRACT: Modern electronic support (ES) systems are descended from systems intended for the detection of small numbers of high-power radar systems, and are thus not suitable for the low-power transmitters and dense signal environments typical of commercial communication networks. A new ES-system architecture is proposed to allow the detection of large numbe
J. Aerosp. Technol. Manag.. Publicado em: 2013-03
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23. Análise de observabilidade baseada em variâncias de medidas estimadas = : Observability analysis based estimated measures variances / Observability analysis based estimated measures variances
The purpose of this work is to present a complete methodology for observability analysis of electric power systems. The observability of the network is determined from the trace of the covariance matrix of the measurement estimate, the variance of the estimated power flow allow the identification of observable islands and the restoration of observability is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2012
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24. Aplicação de técnicas de estimação modal para análise da estabilidade a pequenas perturbações de sistemas de distribuição com geração distribuída / Application of modal estimation techniques for small-signal stability assessment in distribution system with distributed generation
Ao longo das últimas décadas, o advento de geradores síncronos distribuídos têm modificado significativamente a operação dinâmica de sistemas de distribuição. Características dinâmicas que antes eram típicas de sistemas de transmissão estão agora também presentes em sistemas de distribuição. Problemas relacionados a oscilações eletromecâ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012