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First-arrival picking through pattern matching and threshold adjustment
First-arrival picking is a crucial and fundamental task in seismic data processing. Existing direct picking methods are often sensitive to background...
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First-Arrival Picking Method for Active Source Data with Ocean Bottom Seismometers Based on Spatial Waveform Variation Characteristics
The precision and reliability of first-arrival picking are crucial for determining the accuracy of geological structure inversion using active source...
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Picking of first arrival times on noisy ultrasonic S-wave signals for concrete and rock materials
Ultrasonic testing techniques are non-invasive and generally used in geosciences to obtain the longitudinal and shear wave velocities for either...
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Coal mine microseismic identification and first-arrival picking based on Conv-LSTM-Unet
Microseismic identification and first-arrival picking are the fundamental parts of microseismic monitoring. A deep learning model of convolution long...
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Wavefield reconstruction inversion with weak-total-variation constraint based on first arrival traveltime tomography
The objective function of full waveform inversion is a strong nonlinear function, the inversion process is not unique, and it is easy to fall into...
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Optimization method of first-arrival waveform inversion based on the L-BFGS algorithm
The first arrival waveform inversion (FAWI) has a strong nonlinearity due to the objective function using L2 parametrization. When the initial...
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Determining S-Wave Arrival Times for Microseismic Monitoring in Tunnels Based on Instantaneous Phase Difference of Sensors
Accurately ascertaining the S-wave arrival times of microseismic signals is crucial for improving the accuracy with which microseismic events can be...
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Near-surface Site Characterization Based on Joint Iterative Analysis of First-arrival and Surface-wave Data
Near-surface site characterization is of great significance in the fields of geotechnical engineering and resource exploration. In this paper, we...
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Single-iterative algorithm based on first arrival waves for the forward modeling of two-dimensional tomography
Two-dimensional tomographic forward modeling based on first arrivals requires the calculation of the minimum travel times of multiple emission points...
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First-arrival picking through fuzzy c-means and robust locally weighted regression
First-arrival picking is a crucial step in seismic data processing. Because of the diverse background noises and irregular near-surface conditions,...
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Warming of the lower ocean layer modulated by vertical advection prior to typhoon arrival
During the period from 25 August 2012 to 11 December 2013, five typhoons were tracked passing by an observation station near the **sha Islands in the...
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First-arrival automatic picking based on improved energy ratio method and outlier detection theory
Based on the energy ratio method, an automatic picking method with strong noise resistance is proposed. It considers the influence of the current...
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Cyclic Beam Direction of Arrival Estimation Method for Ship Propeller Noise
In underwater acoustic applications, the conventional cyclic direction of arrival algorithm faces challenges, including a low signal-to-noise ratio...
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Near-Surface Seismic Arrival Time Picking with Transfer and Semi-Supervised Learning
The understanding of subsurface information on the Earth is crucial in numerous fields such as economics of oil and gas, geophysical exploration,...
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Velocity structure in the South Yellow Sea basin based on first-arrival tomography of wide-angle seismic data and its geological implications
The South Yellow Sea basin is filled with Mesozoic-Cenozoic continental sediments overlying pre-Palaeozoic and Mesozoic-Palaeozoic marine sediments....
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Automatic arrival-time picking of P- and S-waves of micro-seismic events based on relative standard generative adversarial network and GHRA
Rapid, high-precision pickup of microseismic P- and S-waves is an important basis for microseismic monitoring and early warning. However, it is...
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GNSS antispoofing method using the intersection angle between two directions of arrival (IA-DOA) for multiantenna receivers
Given the increasing number of spoofing attacks, kee** global navigation satellite system transmissions secure has recently become a focus. Many...
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A Numerical Study of Elastic Wave Arrival Behavior in a Naturally Fractured Rock Based on a Combined Displacement Discontinuity-Discrete Fracture Network Model
The arrival behavior of elastic waves in a naturally fractured rock is studied based on numerical simulations. We use the discrete fracture network...
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Assessing tsunami risk along the Aceh coast, Indonesia: a quantitative analysis of fault rupture potential and early warning system efficacy for predicting arrival time and flood extent
The Aceh coast (western Indonesia) is prone to regular tsunamis, as evidenced by historical records and paleo-tsunami studies. Effective community...
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Improvement of Autoregressive Model-Based Algorithms for Picking the Arrival Times of the P-Wave of Rock Acoustic Emission
Acoustic emission (AE) monitoring technology has been widely used in rock engineering. In addition, the accurate picking of P-wave arrival times is...
