---
res:
  bibo_abstract:
  - Due to the modal behavior of geometrically bounded media, ultrasonic guided waves
    propagate in waveguides as a combination of multiple dispersive wave packets,
    which can be simulated as a PDE-problem. Given an excitation in time and space,
    multiple eigen-modes derived from solving the PDE may propagate each with different
    dispersion characteristics and weight. Considering a broad-band pulse exciting
    from one side of a hollow cylindrical waveguide, the received signal at the other
    side consists of all propagating eigen-modes that can be considered approximately
    as the narrow band signals. The synchrosqueezed wavelet transform (SWT) is employed
    to sharpen the time-frequency representation (TFR) of the received waveguide signal.
    Using a ridge detection algorithm, we successively separate the synchrosqueezed
    TFR into several narrow band TFRs which can be identified as oscillatory components
    with time-varying frequency. Then those separated TFRs are reconstructed as narrow
    band signals using the inverse SWT. Based on an analytical model of the waveguide,
    we observe that the decomposed signals are similar to those dominant eigen-modes
    simulated above. Moreover, also the group delay and, therefore, the group velocity
    of each decomposed signal can be estimated well. This is of high interest when
    analyzing the characteristic of a given waveguide, such as acoustical property
    measurements or non-destructive testing.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Fabian
      foaf_name: Bause, Fabian
      foaf_surname: Bause
  - foaf_Person:
      foaf_givenName: Boqiang
      foaf_name: Huang, Boqiang
      foaf_surname: Huang
  - foaf_Person:
      foaf_givenName: Angela
      foaf_name: Kunoth, Angela
      foaf_surname: Kunoth
  - foaf_Person:
      foaf_givenName: Bernd
      foaf_name: Henning, Bernd
      foaf_surname: Henning
      foaf_workInfoHomepage: http://www.librecat.org/personId=213
  dct_date: 2013^xs_gYear
  dct_language: eng
  dct_title: Ultrasonic Waveguide Signal Decomposition Using the Synchrosqueezed Wavelet
    Transform for Modal Group Delay Computation@
...