Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Th. D. Popescu
Editorial: ICIC International, ICIC Express Letters, An International Journal of Research and Surveys, ISSN 1881-803X , Vol. 4, p.37-44, 2010.
Reliable earthquake waves characterization is essential for
better understanding wave propagation phenomena and the
characterization of the local site effects. Separate time and
frequency analysis by themselves do not fully describe the nature of
these dynamic loads. Significant efforts have been made in the last
years to permit the temporal evolution representation of
non-stationary spectral characteristics. The objective of this paper
is to present some joint time-frequency techniques with possible
application in Earthquake Engineering. Finally, some experimental
results obtained in the analysis of the
earthquake records during the Vrancea seism, Romania, August 1986, are presented.
Cuvinte cheie: Time-frequency analysis, spectrogram, Wigner-Ville distribution, Choi-Williams distribution, reduced interference distribution, earthquake signals