Results 21 to 30 of about 183,171 (301)

Simulação digital do sistema de tração elétrica metroferroviária: modelagem e métodos

open access: yesExacta, 2009
As características de operação do sistema de tração elétrica metroferroviária podem ser predeterminadas por meio de simulação a partir de modelos matemáticos.
Cassiano Lobo Pires   +2 more
doaj   +1 more source

Adaptive meta-learning extreme learning machine with golden eagle optimization and logistic map for forecasting the incomplete data of solar irradiance

open access: yesEnergy and AI, 2023
Solar energy has become crucial in producing electrical energy because it is inexhaustible and sustainable. However, its uncertain generation causes problems in power system operation.
Sarunyoo Boriratrit   +3 more
doaj   +1 more source

Gold at what cost? Another megaproject threatens biodiversity in the Amazon

open access: yesPerspectives in Ecology and Conservation, 2017
The Xingu River, located in northern Brazil, is already under the impacts of one of the most harmful projects in the history of the Amazon – the Belo Monte hydroelectric dam.
Raffael M. Tófoli   +6 more
doaj   +1 more source

Large-scale gene discovery in the pea aphid Acyrthosiphon pisum (Hemiptera) [PDF]

open access: yes, 2006
Aphids are the leading pests in agricultural crops. A large-scale sequencing of 40,904 ESTs from the pea aphid Acyrthosiphon pisum was carried out to define a catalog of 12,082 unique transcripts.
Rispe, Claude   +71 more
core   +1 more source

Comprehensive Energy Analysis of Vehicle-to-Grid (V2G) Integration with the Power Grid: A Systemic Approach Incorporating Integrated Resource Planning Methodology

open access: yesApplied Sciences, 2023
This work aims at a comprehensive assessment of the impact of vehicle-to-grid (V2G) technology on both demand and supply sides, considering integrated resource planning for sustainable energy.
Marcos Frederico Bortotti   +3 more
doaj   +1 more source

Digital implementation of three-phase rectifier with deadbeat controller

open access: yesEletrônica de Potência, 2002
A full digital control of a voltage source converter (VSC) rectifier is presented. The behavior of the AC and DC sides were modeled and used for the design of the AC current tracking controller and DC voltage regulator.
Alisson Dias Junqueira   +2 more
doaj   +1 more source

Pea-oat intercrops are superior to pea-wheat and pea-barley intercrops

open access: yesActa Agriculturae Scandinavica, Section B - Plant Soil Science, 2008
Abstract A three-year field experiment was conducted in Estonia to determine which combinations of pea (Pisum sativum L.) and wheat (Triticum aestivum L.), oats (Avena sativa L.) and barley (Hordeum distichon L.) were most suitable for mixed cultivation and the effect of pea on the yield potential of cereals.
R. Lauk, E. Lauk
openaire   +1 more source

Pea-barley intercrop N dynamics in farmers fields [PDF]

open access: yes, 2001
Knowledge about crop performances in farmers’ fields provides a link between on-farm practice and re-search. Thereby scientists may improve their ability to understand and suggest solutions for the problems facing those who have the responsibility of ...
Peoples, Mark B.   +4 more
core   +1 more source

Seasonal changes at population and individual levels in the diet of juvenile catfish in a Neotropical floodplain

open access: yesJournal of Freshwater Ecology, 2018
Intra-population variation in niches is a widespread phenomenon in animal populations, but, in fish, this knowledge is still scarce. Here, we investigated the population and between-individuals variations in the diet of juvenile Pimelodus maculatus, in ...
Alessandra Fernandes da Cunha   +2 more
doaj   +1 more source

Casa de plástico, en Italia

open access: yesInformes de la Construccion, 1958
En otro artículo hemos expuesto el sistema constructivo de un modelo de casa en plástico, americana. Esta que mostramos ahora fue presentada en la Feria de Milán de 1957: elemento unitario, planos, maquetas y memoria explicando íntegramente la ...
Cesare Pea
doaj   +1 more source

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