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Loading Pitch, La Brea, Trinidad
(Davidson and Todd Ltd., Trinidad, 2010-02-11)
Photo of the Brighton Pier at La Brea, Trinidad. Here ships are loaded with pitch carried by an aerial tramway. The card also includes a handwritten correspondence and a one penny Trinidad postage stamp.
Proposta de um método para bloqueio do esquema regional de alívio de carga frente a inércia rotativa de desligamento dos motores de indução
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-02-26)
The Under Frequency Load Shedding (UFLS) is an important systemic protection method used to prevent the electrical system from collapsing when the available generation is less than the load demanded. Traditionally, UFLS ...
A convex chance-constrained model for reactive power planning
(2015-10-01)
This paper presents a new approach for long-term reactive power investment planning and operation using a multiperiod mixed-integer stochastic convex model, where load uncertainty is also included. The risk of not meeting ...
A novel strategy to restore power systems after a great blackout: The Argentinean case
(Elsevier, 2021-09)
This paper presents a multi-objective mathematical model to perform power restoration. It considers simultaneously the objective functions: restoration time, load shedding, and cost. New formulations are developed to improve ...
Control preventivo dinamico de sistemas de energia electrica usando redespacho de generacion y corte de carga
(1999-12-01)
A model for preventive control in electrical systems is presented, taking into account the dynamic aspects of the network. Among these aspects, the effects provoked by perturbations which cause oscillations in synchronous ...
Control preventivo dinamico de sistemas de energia electrica usando redespacho de generacion y corte de carga
(1999-12-01)
A model for preventive control in electrical systems is presented, taking into account the dynamic aspects of the network. Among these aspects, the effects provoked by perturbations which cause oscillations in synchronous ...
The time sequences of oral and fecal viral shedding of coronavirus disease 2019 (COVID-19) patients
Recent studies found that SARS-CoV-2 could be detected in the fecal samples, and
live virus could be successfully isolated from stool and used for successful infection
in cell cultures, indicating a possible fecal-oral ...