3,498 research outputs found
La realidad griega en la ficción del “Tirant”
Durante la segunda mitad del siglo XV tienen lugar dos hechos que están conectados en nuestro trabajo: la caĂda de Constantinopla y la composiciĂłn de la novela Tirant Lo Blanch. El artĂculo examina el plano histĂłrico del Imperio Bizantino desde la presencia de la CompañĂa Catalana hasta el final del Imperio, y su uso por parte de J. Martorell al componer su gran obra.During the second half of the s. XV occur two facts that are connected to our work: the fall of Constantinople and the composition of the novel Tirant Lo Blanch. The article examines the historical background of the Byzantine Empire from the presence of the Catalan Company until the end of the Empire and the use of them made by J. Martorell to compose his masterpiece
Optimization of modular wiring harnesses by means of regression models for temperature prediction of wire bundles
Automotive wiring harnesses have become heavier and more complex due to their increasing number of electrical components. It is now desired to reduce their mass of copper. For this purpose, experimentation can be partially replaced by simulation, but it is still impossible to exhaustively simulate all of the combinations of modular wiring harness. This proposed approach consists of carrying out simulations using the FEM method and using their results to create regression models. Polynomial formulae can give the same information as simulations within a clearly reduced time and satisfying accuracy. An optimization algorithm introduced in this study will use them to assign new cable cross-sections of harnesses considering their currents and the ambient temperature.Postprint (author's final draft
Custom integer optimization method for wire bundle dimensioning
Automotive wiring harnesses have gained weight and
complexity through the last decades due to the increasing number
of electrical components, which has raised the interest on its
weight optimization. For this purpose, it is essential to know
at least the maximum amount of steady current that either
single wires or bundles can carry. However, the large amount
of combinations of the customer-speciÂżc wire harnesses makes
it impossible to exhaustively simulate all of the combinations
that would allow for a reliable analysis and optimization of the
network. The proposed approach consists of achieving accurate
predictions of the wire thermal behaviour using fast on-line
polynomial functions, which have been created as regression
models using data from off-line worst-case Âżnite element sim-
ulations. These regression models provide good accuracy for
the critical dimensions of wire bundles in a much shorter time
than simulations, so that they can be used on-line in optimiza-
tion algorithms. Two different approaches of optimization are
presented here in order to assign discrete values of available
wire cross-section to the wire bundles: The Âżrst one uses integer
linear programming, and the second one consists of a recently
created custom algorithm whose objective is to reduce the
computation time of the integer linear programming approach.
This latter objective is satisfactorily accomplished. Results of both
optimization approaches are validated by means of Âżnal Âżnite
element simulations, and they promisingly fulÂżll the objectives
of this study.Peer ReviewedPostprint (author's final draft
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