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Smart plates: reduced models and numerical simulations
Carvalho, José A.; Figueiredo, Isabel N.; Martínez, RebecaIn this paper asymptotic models describing the mechanical and electric equilibrium state of two types of smart structures are presented and justified. The first structure consists of an anisotropic elastic thin plate with two surface bonded anisotropic piezoelectric patches and the second one is an anisotropic elastic sandwich thin plate with an inserted anisotropic piezoelectric patch. The two unknowns of the ...
Zonamento acústico em pequenos aglomerados urbanos
Carlos Aquino Monte; A Carvalho; José A. Furtado GomesThis paper presents a theoretical/practical analysis regarding the sound levels made by urban traffic within a medium size agglomeration in the Guarda district (Portugal) by in situ measurements of the continuous equivalent sound levels Ld, Le and Ln for the usual traffic conditions and residual sound levels. An avaliation of the practical consequences of the aplication of the European Union Directive 2002/49/C...
Letter: Impact of double cavity FP demultiplexers on the performance of WDM dis...
Freire, Mário M.; Carvalho, José A. R. Pacheco De; Carvalho, Álvaro M. F. De; Silva, Henrique J. A. DaThis paper discusses the impact of double cavity Fabry-Perot demultiplexers on the performance of wavelength division multiplexing (WDM) systems with dispersion supported transmission (DST) of three 10 Gbit/s channels separated 1 nm. For performance assessment, a suitable simulation methodology has been used which combines signal simulation with noise analysis in optically amplified multichannel direct detectio...
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