Results 1 to 10 of about 2,699,007 (150)

Fish schooling as a basis for vertical axis wind turbine farm design [PDF]

open access: yes, 2000
Most wind farms consist of horizontal axis wind turbines (HAWTs) due to the high power coefficient (mechanical power output divided by the power of the free-stream air through the turbine cross-sectional area) of an isolated turbine.
Whittlesey, Robert W.   +2 more
core   +8 more sources

Measurements of Antenna Surface for a Millimeter-Wave Space Radio Telescope II; Metal Mesh Surface for Large Deployable Reflector [PDF]

open access: yes, 2012
Large deployable antennas with a mesh surface woven by fine metal wires are an important technology for communications satellites and space radio telescopes.
Kamegai, Kazuhisa, Tsuboi, Masato
core   +1 more source

Performance Analysis of Effective Symbolic Methods for Solving Band Matrix SLAEs [PDF]

open access: yes, 2019
This paper presents an experimental performance study of implementations of three symbolic algorithms for solving band matrix systems of linear algebraic equations with heptadiagonal, pentadiagonal, and tridiagonal coefficient matrices.
Ayriyan, Alexander, Veneva, Milena
core   +2 more sources

Reply to Comment on ‘Coefficient of performance of Stirling refrigerators’ [PDF]

open access: yesEuropean Journal of Physics, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

A unifying view for performance measures in multi-class prediction [PDF]

open access: yes, 2010
In the last few years, many different performance measures have been introduced to overcome the weakness of the most natural metric, the Accuracy. Among them, Matthews Correlation Coefficient has recently gained popularity among researchers not only in ...
Cesare Furlanello   +3 more
core   +3 more sources

Improved Thermoelectric Cooling Based on the Thomson Effect [PDF]

open access: yes, 2012
Traditional thermoelectric Peltier coolers exhibit a cooling limit which is primarily determined by the figure of merit, zT. Rather than a fundamental thermodynamic limit, this bound can be traced to the difficulty of maintaining thermoelectric ...
B. Moizhes   +15 more
core   +2 more sources

Relationships for Nozzle Performance Coefficients [PDF]

open access: yesVolume 1B: Gas Turbines, 1979
The relationships between the performance coefficients for flow, kinetic energy, and thrust are developed for the irreversible adiabatic flow through a choked nozzle. The basis of the development is maximum flowrate per unit area and an exit pressure greater than or equal to the exhaust pressure.
openaire   +1 more source

Analysis of Performance of Cavitation Models with Analytically Calculated Coefficients [PDF]

open access: yesEnergies, 2021
Cavitation is often simulated using a mixture model, which considers the transport of an active scalar, namely the vapor fraction αv. Source and sink terms of the transport equation of αv, namely vaporization and condensation terms, rule the dynamics of the cavity and are described through different models.
Andrea Savio   +2 more
openaire   +3 more sources

Illustrating the relationship between the coefficient of performance and the coefficient of system performance by means of an R404 supermarket refrigeration system [PDF]

open access: yesInternational Journal of Refrigeration, 2016
Because the coefficient of performance (COP) is primarily concerned with the core refrigeration system, using it for optimisation purposes may lead to higher than necessary energy consumption. This hypothesis was studied with a simple equation relating this coefficient to the coefficient of system performance (COSP), and with a software model based on ...
Braun, M.R., Walton, P., Beck, S.B.M.
openaire   +2 more sources

A rigorous approach to the robust design of continuous-time ΣΔ modulators [PDF]

open access: yes, 2011
In this paper we present a framework for robust design of continuous-time Sigma Delta modulators. The approach allows to find a modulator which maintains its performance ( stability, guaranteed peak SNR, ...) over all the foreseen parasitic effects ...
De Vuyst, Bart   +2 more
core   +2 more sources

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