A5003377049- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Geophysics and Sensor Technology
- Seismology and Earthquake Studies
- Ultrasonics and Acoustic Wave Propagation
- Geophysical Methods and Applications
- Advanced Fiber Optic Sensors
- Earthquake Detection and Analysis
- Drilling and Well Engineering
- High-pressure geophysics and materials
- Underwater Acoustics Research
- Geophysical and Geoelectrical Methods
- Geotechnical Engineering and Underground Structures
- Smart Grid and Power Systems
- Advanced Algorithms and Applications
- Groundwater and Watershed Analysis
- Gallbladder and Bile Duct Disorders
- Ocean Waves and Remote Sensing
- Groundwater flow and contamination studies
- Cholangiocarcinoma and Gallbladder Cancer Studies
- Speech and Audio Processing
- Power Systems and Renewable Energy
- Acoustic Wave Phenomena Research
- Railway Engineering and Dynamics
- Coastal and Marine Dynamics
Zhejiang University
2019-2024
Rice University
2023
China University of Geosciences
2015-2021
China Three Gorges University
2013
Passive seismic methods in highly populated urban areas have gained much attention from geophysics and civil engineering communities because traditional surveys, especially complex urbanized environments, might be improperly applied. In passive methods, directional noise sources will inevitably bring azimuthal effects spatial aliasing to dispersion measurements due the fact that true randomness of ambient cannot achieved reality. To solve these problems, multichannel analysis surface (MAPS)...
The multichannel analysis of surface wave (MASW) method has been effectively and widely used to determine near-surface shear-wave velocity. Horizontal resolution the MASW represents minimum horizontal length recognizable geologic anomalous bodies on a pseudo-2D S-wave velocity [Formula: see text] section. Accurately assessing achievable lateral is one main issues in variation reconstruction using method. It difficult quantitatively estimate because many influencing factors, such as...
SUMMARY Ambient noise surface wave methods have gained much attention among geophysical and civil engineering communities because of their capability determining near-surface shear velocities in highly populated urban areas. Higher mode information waves is important dispersion curve inversion for velocity structure. The frequency–Bessel (F-J) transform method an effective tool multimode extraction, which has been applied to multiscale investigations the Earth measured energy with F-J...
Accurate understanding of near-surface structures the solid earth is challenging, especially in urban areas where active source seismic surveys are constrained and difficult to perform. The analysis anthropogenic noise provides an alternative way image shallow subsurface environments. We have developed application using traffic with interferometry investigate Hangzhou City, Eastern China. Noise data were recorded by dense linear arrays approximately 5 m spacing deployed along two crossing...
SUMMARY With the emergence of massive seismic data sets, surface wave methods using deep learning (DL) can effectively obtain shear velocity (Vs) structure for non-invasive near-surface investigations. Previous studies on DL inversion geophysical investigation have a reference model to generate training set, while investigations no model. Therefore, we systematically give set generation processes. In process, use both prior information and observed constrain so that learn local geological...
ABSTRACT In mineral exploration, increased interest towards deeper mineralizations makes seismic methods attractive. One of the critical steps in processing workflows is static correction, which applied to correct effect shallow, highly heterogeneous subsurface layers, and improve imaging targets. We showed an effective approach estimate statics, based on analysis surface waves (groundroll) contained reflection data, we it a legacy line acquired at iron‐oxide mining site Ludvika Sweden....
Train traffic has recently been realized as a potential seismic source for imaging and monitoring shallow subsurface structures. High-speed trains usually move on viaducts generate wavefields through bridge piers. This kind of is not randomly distributed in space time thus indicates the characteristic self-correlation. We find that correlated sources one high-speed train running over piers make time-delayed spurious signals crosscorrelation functions. The direct-wave interferometry with...
Rayleigh-wave ellipticity polarization, or horizontal-to-vertical ([Formula: see text]) spectral ratio, is particularly sensitive to shallow earth model parameters (e.g., S-wave velocity). We develop a novel [Formula: text] inversion method delineate near-surface strong-velocity-contrast structures. In the new method, velocity perturbed until synthetic curve fitted observed one based on crosscorrelation misfit function. This criterion neglects absolute amplitude of and curves, which can...
Train traffic has been realized as a powerful seismic source for imaging and monitoring the shallow subsurface. High-speed trains running on viaducts generate waves through bridge piers. The sources at piers with moving train are correlated in space time. In this study, we extract Rayleigh, Love, virtual refraction P by applying interferometry to high-speed-train-induced vibrations near-surface characterization. We use crosscoherence instead of crosscorrelation eliminate spurious imprint...
Passive surface-wave utilization has been intensively studied as a means of compensating for the shortage low-frequency information in active measurement. In general, passive methods cannot provide phase velocities up to several tens hertz; thus, are often required order increase frequency range. To reduce amount field work, we propose strategy high-frequency survey that imposes sources during continuous observation; call our "mixed-source (MSW) measurement." Short-duration (within 10 min)...
The horizontal-to-vertical spectral-ratio (HVSR) analysis of ambient noise recordings is a popular reconnaissance tool used worldwide for seismic microzonation and earthquake site characterization. We have expanded this single-station passive HVSR technique to active multicomponent data. focus on the calculation Rayleigh waves from active-seismic records. separate different modes in dispersion spectra then estimate fundamental mode. mode separation implemented frequency-phase velocity...
The dispersive characteristics of high-frequency (≥2 Hz) Rayleigh waves have been widely applied to determine subsurface shear velocity ([Formula: see text]). However, the [Formula: text] high-velocity surface layers (e.g., rigid roads in urban areas) and underlying is poorly constrained Rayleigh-wave dispersion inversion. Compared phase velocity, horizontal-to-vertical (H/V) ratios particle motion (i.e., ellipticity) are particularly sensitive shallow structures. Therefore, we proposed a...