Results 41 to 50 of about 7,499 (272)

Compensación de la potencia reactiva en sistemas de baja tensión mediante bancos de condensadores fijos, utilizando algoritmos genéticos

Revista Científica de Ingeniería Energética, 2010
The energy efficiency of an electric system depends in great measure of the reactive power compensationthat it is carried out. One of the roads more employees are the use of capacitors banks.A good selection of these, presupposes three aspects: the ...
Davel Borges, et al.
doaj  

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Arterial oxygen content is precisely maintained by graded erythrocytotic responses in settings of high/normal serum iron levels, and predicts exercise capacity: an observational study of hypoxaemic patients with pulmonary arteriovenous malformations.

, 2014
Oxygen, haemoglobin and cardiac output are integrated components of oxygen transport: each gram of haemoglobin transports 1.34 mls of oxygen in the blood.
AD Kjeldsen, AM Evans, AN Friedman, BE Phillips, BM Silva, BR O'Driscoll, CG Mason, CL Shovlin, CL Shovlin, CL Shovlin, CL Shovlin, CL Shovlin, CL Shovlin, Claire L. Shovlin, CM Fletcher, D Pennington, DZ Levett, E McLean, ER Chilvers, H Finnamore, Hannah C. Tighe, IS Anand, JA Dutton, JA Livesey, James E. Jackson, JE Van de Pette, JJ Mager, JL Hart, L Boyer, LC Ou, Louisa C. Williams, LS Valberg, M Hu, M Moussouttas, ME Faughnan, MF McMullin, MK Whyte, MK Whyte, MP Grocott, MW van Gent, P Gupta, P Shovlin CL Wilmshurst, PB Terry, PC Hébert, PM Sondel, RC Hewes, RD Thompson, S Honda, T Ueki, Tracey Rouault, V Cottin, Vatshalan Santhirapala, WB Porter, WS Smellie   +53 more
core   +2 more sources

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Optimal Reactive Power Planning Using FACTS Devices for Voltage Stability Enhancement in Power Transmission Systems

Energy Science & Engineering
The increased demand for electricity has forced power systems to operate near their stability limits. Optimal reactive power planning (ORPP) can enhance voltage stability and provide much‐needed support for grid operation. Flexible AC transmission system
Rawan Abu Zeitawyeh, Ayman Faza
doaj   +1 more source

Thunderstorm Algorithm for Determining Unit Commitment in Power System Operation [PDF]

, 2016
Solving the unit commitment problem is an important task in power system operation for deciding a balanced power production between various types of generating units under technical constraints and environmental limitations.
Afandi, A. N. (A), Sulistyorini, Y. (Yunis)   +1 more
core   +3 more sources

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Use of Hooke's law for stabilizing future smart grid - the electric spring concept [PDF]

, 2013
Hooke's law for mechanical springs was developed in the 17th century. Recently, new power electronics devices named electric springs have been developed for providing voltage regulation for distribution networks and allowing the load demand to follow ...
Chudhuri, B, Hui, SYR, Lee, CK, Tan, SC, Wu, FF   +4 more
core   +1 more source

Resistance Rapid Heating of Aluminum Coatings in an Extreme High Vacuum–Adequate Atmosphere for Hot Stamping

Advanced Engineering Materials, EarlyView.
The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht, Alexander Schnettger, Ulrich Holländer, Sven Hübner, Bernd‐Arno Behrens, Hans Jürgen Maier   +5 more
wiley   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source