scholarly journals Research on the oscillation effect of near-surface metal defect based on laser-generated acoustic surface wave

2015 ◽  
Vol 64 (13) ◽  
pp. 134302
Author(s):  
Zeng Wei ◽  
Wang Hai-Tao ◽  
Tian Gui-Yun ◽  
Hu Guo-Xing ◽  
Wang Wen
Keyword(s):  
Surface Wave ◽  
Oscillation Effect ◽  
Acoustic Surface Wave ◽  
Near Surface ◽  
Surface Metal

Activating Metal Oxides Nanocatalysts for Electrocatalytic Water Oxidation by Quenching-Induced Near-Surface Metal Atom Functionality

2021 ◽  
Vol 143 (35) ◽  
pp. 14169-14177
Author(s):  
Changchun Ye ◽  
Juzhe Liu ◽  
Qinghua Zhang ◽  
Xiaojing Jin ◽  
Yun Zhao ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Metal Atom ◽  
Water Oxidation ◽  
Near Surface ◽  
Surface Metal ◽  
Surface Metal Atom

ACOUSTIC SURFACE WAVE MIXING ON α‐QUARTZ

1969 ◽  
Vol 15 (1) ◽  
pp. 10-12 ◽  
Author(s):  
E. G. H. Lean ◽  
C. G. Powell ◽  
L. Kuhn
Keyword(s):  
Surface Wave ◽  
Wave Mixing ◽  
Acoustic Surface Wave

Acoustic Surface Wave Resonators for Broadband Applications

1978 ◽  
Author(s):  
J. Vandewege ◽  
P.E. Lagasse ◽  
T. Naten ◽  
F. Sleeckx ◽  
H. Tromp ◽  
...  
Keyword(s):  
Surface Wave ◽  
Acoustic Surface Wave

Tunnel detection at Yuma Proving Ground, Arizona, USA — Part 1: 2D full-waveform inversion experiment

Geophysics ◽  
2019 ◽  
Vol 84 (1) ◽  
pp. B95-B105 ◽  
Author(s):  
Yao Wang ◽  
Richard D. Miller ◽  
Shelby L. Peterie ◽  
Steven D. Sloan ◽  
Mark L. Moran ◽  
...  
Keyword(s):  
Surface Wave ◽  
Waveform Inversion ◽  
Velocity Profiles ◽  
Infinite Length ◽  
Full Waveform Inversion ◽  
S Wave ◽  
Near Surface ◽  
Tunnel Detection ◽  
Full Waveform ◽  
Wave Methods

We have applied time domain 2D full-waveform inversion (FWI) to detect a known 10 m deep wood-framed tunnel at Yuma Proving Ground, Arizona. The acquired seismic data consist of a series of 2D survey lines that are perpendicular to the long axis of the tunnel. With the use of an initial model estimated from surface wave methods, a void-detection-oriented FWI workflow was applied. A straightforward [Formula: see text] quotient masking method was used to reduce the inversion artifacts and improve confidence in identifying anomalies that possess a high [Formula: see text] ratio. Using near-surface FWI, [Formula: see text] and [Formula: see text] velocity profiles were obtained with void anomalies that are easily interpreted. The inverted velocity profiles depict the tunnel as a low-velocity anomaly at the correct location and depth. A comparison of the observed and simulated waveforms demonstrates the reliability of inverted models. Because the known tunnel has a uniform shape and for our purposes an infinite length, we apply 1D interpolation to the inverted [Formula: see text] profiles to generate a pseudo 3D (2.5D) volume. Based on this research, we conclude the following: (1) FWI is effective in near-surface tunnel detection when high resolution is necessary. (2) Surface-wave methods can provide accurate initial S-wave velocity [Formula: see text] models for near-surface 2D FWI.

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