11 Result(s)
within
Zhi-yang Wang
English
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Article
Seismic Signal Analysis Based on Adaptive Variational Mode Decomposition for High-speed Rail Seismic Waves
High-speed rails with determined length and load run for long periods at almost uniform speeds along fixed routes, constituting a new stable and repeatable artificial seismic source. Studies have demonstrated ...
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Article
Numerical modeling of elastic waves using the random-enhanced QPSO algorithm
In this paper, we derive a random-enhanced quantum particle swarm optimization (QPSO) algorithm and develop a new finite difference (FD) scheme based on this algorithm. The random-enhanced QPSO algorithm has a...
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Chapter and Conference Paper
Application of Adaptive VMD Algorithm in High-Speed Rail Seismic Signal Extraction
When a high-speed train is in motion, it causes vibrations in the railway tracks, resulting in seismic waves. However, the actual collected data also includes background noise from the Earth and various human ...
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Chapter and Conference Paper
Elastic Full Waveform Inversion Based on the High-Speed Rail Seismic Source
With the establishment of a widely distributed and dense high-speed rail network, high-speed rail will be spread all over China in the near future. Research shows that high-speed rail seismic waves contain ric...
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Chapter and Conference Paper
Numerical Modelling and Optimization of the Second-Order Strain Gradient Wave Equation
In the conventional continuum mechanics theory, the strain energy density function at the point of the medium material only depends on the classical strain, and the medium is modeled as an ideal continuum. For...
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Chapter and Conference Paper
An Improved DBO Algorithm Applying for Numerical Modelling Under the Asymmetric Wave Equations
The asymmetric wave equation encompasses the influence of the actual fine structure inside the medium on the wave field, which can better represent the complex seismic wavefield excited by the complex source a...
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Article
A Hybrid Dung Beetle Optimization Algorithm with Simulated Annealing for the Numerical Modeling of Asymmetric Wave Equations
In the generalized continuum mechanics (GCM) theory framework, asymmetric wave equations encompass the characteristic scale parameters of the medium, accounting for microstructure interactions. This study inte...
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Article
Numerical modeling based on the improved BSO algorithm for asymmetric elastic wave equations
With the continuous research in seismology, the influence of the heterogeneity caused by microstructure interactions of the medium on seismic wave propagation has been paid more attention. Wang et al. (2020) p...
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Article
Optimized high-order finite-difference modeling of second-order strain gradient wave field effects
The second-order strain gradient wave equation is based on the generalized continuum mechanics theory, and it can enrich the content of classical continuum mechanics theory with the incorporation of the second...
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Article
A Method for Accurate Measuring the Tensile Strength of Single Rock Grain Interface
Anapparatus with precise controllability and large stiffness was designed to investigate the mechanical behavior of rock grain interface.
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Article
Optimizing staggered-grid finite-difference method based on the least-squares combination of the square window function
The staggered-grid finite-difference method (SGFDM) has been extensively employed in numerical modeling, seismic imaging, and waveform inversion because of its high efficiency, accuracy, and practicality. Nume...
