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Dizhen xuebao全波形反演是一种利用地震波传播的动力学特征来获取地下介质物性参数的反演方法，可为揭示地下精细结构提供重要依据。本文以弹性波方程作为数学模型来模拟地震波传播规律并进行相应的反演方法研究。为提高计算效率与反演结果的准确性，可将近似解析离散化（NAD）算子用于频率域弹性波方程的正演模拟。本文在频率域NAD离散的基础上推导阻抗矩阵的稀疏分块结构与反演目标函数对模型参数的梯度计算公式，由此建立基于NAD算子的频率域弹性波全波形反演方法。为验证该方法的有效性，文中通过数值实验对多种典型介质模型进行反演计算 ...
Xiaoting Yang, Ning Wang, Chao Lang
doaj +1 more source
An optimizing microseismic method for rock burst early warning based on mining production process
Deep Underground Science and Engineering, EarlyView.A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han +6 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.Aluminum‐enhanced afterburning renders AE explosives more hazardous than conventional ones. Corrugated steel linings reduce far‐field AE blast overpressure by ~50% through wave reflection and dissipation. The developed model accurately predicts peak pressure (<10% error) and arrival time (<3% error), supporting protective design.
Zhen Wang +5 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu +8 more
wiley +1 more source
npj Computational MaterialsMicrostructural mapping of polycrystalline metallic alloys is essential for predicting their macroscopic mechanical performance. Among existing techniques, non-destructive subsurface imaging offers a promising but technically challenging pathway for ...
Yongwei Xie +4 more
doaj +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A lightweight hybrid backpack integrating SC‐TENGs and R‐EMGs harvests biomechanical energy during walking. With a low activation speed of 3 km h−1 and a high specific power of 0.18 W kg−1, it enables self‐powered field safety management. The power backpack refers to an energy‐harvesting solution engineered to mitigate battery reliance in wearable ...
Jie Chen +6 more
wiley +1 more source
An adaptive multiscale algorithm for efficient extended waveform inversion
, 2017 Subsurface-offset extended full-waveform inversion (FWI) may converge to kinematically accurate velocity models without the low-frequency data accuracy required for standard data-domain FWI.
Lei Fu +3 more
core +1 more source
Equine Veterinary Journal, EarlyView.Abstract Background Exercise‐associated cardiac arrhythmias may contribute to poor performance and sudden cardiac death in horses. Widespread monitoring is limited by device availability and suitability for field use. Objectives To (1) compare electrocardiographic (ECG) quality from a smart textile system (Myant Skiin Equine) with a reference device ...
Amie Kapusniak +5 more
wiley +1 more source
Elastic Full-Waveform Inversion in the Presence of Fracture-Induced Anisotropy [PDF]
, 2020 Seismic imaging of the subsurface is essential in both the exploration and production of hydrocarbon reservoirs. Seismic full-waveform modelling and inversion methods can be used to obtain high-resolution images of the elastic properties.
Erstad, Jonas Holm
core
Elastic full-waveform inversion of seismic ambient noise
The Leading EdgeAbstract Elastic full-waveform inversion (FWI) is appealing for an enhanced integration of wave physics propagation and the resulting improved characterization of the subsurface due to the reconstruction of P- and S-wave velocity models.
Métivier, Ludovic +7 more
openaire +2 more sources