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- W2326582045 abstract "Estimation of seismic surface wave phase velocities is important to dynamic and earthquake engineering problems. Several methods have been proposed to estimate the Rayleigh seismic surface wave velocity, including the recent applications of array-based processing algorithms. This paper will discuss the importance of appropriate geometric spreading weights for wavenumber and amplitude estimates. In particular, the article will introduce the forward-backward cylindrical beamformer and compare it with the forward-only cylindrical beamformer performance for wavenumber and amplitude estimation. The algorithm performance will also be compared for two candidate weighting functions, which are the square-root of distance far-field weights and the cylindrical wavenumber weights. The results show that the square-root weighting tends to yield better wavenumber estimates, while the cylindrical weighting tends to yield better amplitude estimates. Additionally, the forward-backward algorithm shows better mainlobe and sidelobe characteristics compared to the forward-only algorithm." @default.
- W2326582045 created "2016-06-24" @default.
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- W2326582045 date "2007-10-14" @default.
- W2326582045 modified "2023-10-18" @default.
- W2326582045 title "Forward-Backward Cylindrical Beamformer and Geometric Spreading Weighting for Seismic Surface Wave Parameter Estimation" @default.
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- W2326582045 doi "https://doi.org/10.1061/40908(227)4" @default.
- W2326582045 hasPublicationYear "2007" @default.
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