Autor: Godinho, P. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: A Level-Based Approach to Prioritize Telecommunications R&D
Autorzy:: Fialho, J.
Godinho, P.
Costa, J. P.
Afonso, R.
Regalado, J. G.
Tematy:: multicriteria decision support
R&D project evaluation; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/307952.pdf Link otwiera się w nowym oknie
Opis:: In this paper, an approach to evaluate R&D projects in telecommunications is presented. These Project have particular features that cannot be properly incorporated by classical evaluation methods. This approach incorporates different criteria, both quantitative and qualitative, and also management flexibility and uncertainty. Thus, it is an approach that can be applied to real data of R&D projects in a telecommunications company.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: 3D Multi-Domain MFS Analysis of Sound Pressure Level Reduction Between Connected Enclosures
Autorzy:: Godinho, L.
Branco, F. G.
Mendes P., A.
Tematy:: Method of Fundamental Solutions (MFS)
domain decomposition
closed spaces
sound pressure level reduction; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/177013.pdf Link otwiera się w nowym oknie
Opis:: In this paper, the authors study the 3D propagation of sound waves between two closed spaces. The separation element between the two rooms is considered to include either a small opening or a homogeneous lightweight panel, coupling the two spaces. A numerical study of this configuration is performed, trying to understand the influence of the position and geometry of this opening in the sound pressure level reduction curve at low and midfrequencies. Additionally, the coupling effect between the two acoustic spaces is analyzed, in order to better understand its importance when determining the sound pressure level reduction. Different boundary conditions are ascribed to the walls of these rooms, simulating both the completely reflecting and partially absorbing surfaces. The numerical modelling was performed using a multi-domain formulation of the Method of Fundamental Solutions (MFS). The system is composed of two coupled rooms, limited by rigid or by absorbing walls, and separated by a thin wall (tending to null thickness) with a small opening. An experimental validation of the proposed model is presented, comparing its results with those found experimentally for a reduced-scale model. It is important to note that, for such a configuration, a traditional single-domain approach using methods like the MFS or the BEM would lead to undetermined equation systems, and thus the proposed model makes use of a domain decomposition technique.
Dostawca treści:: Biblioteka Nauki

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