Results 91 to 100 of about 3,752,834 (199)

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

open access: yesDeep 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

Subsurface polycrystalline microstructure reconstruction via immersion ultrasound full waveform inversion

open access: yesnpj Computational Materials
Microstructural 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

Triboelectric–Electromagnetic Generator‐Enabled Hybrid Power Backpack for Self‐Powered Field Safety Management

open access: yesENERGY &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

open access: yes, 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

Validation of a smart textile electrocardiographic monitoring device in racehorses during high‐speed exercise

open access: yesEquine 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]

open access: yes, 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  

Water‐driven dispersible fiber electrode arrays for position‐dependent intracardiac electrophysiological recording

open access: yesFlexMat, EarlyView.
Abstract Intracardiac electrophysiological recording plays an essential role in identifying abnormal cardiac electrical activity and guiding arrhythmia diagnosis and treatment planning. A key challenge for minimally invasive intracardiac electrodes is to combine reliable transvascular delivery with stable and compliant endocardial contact.
Jinyang Mao   +7 more
wiley   +1 more source

A flexible dual‐gate thin‐film transistor‐based tactile sensor array with polarity‐aware encoding for neuromorphic recognition

open access: yesFlexMat, EarlyView.
A flexible piezoelectric tactile sensor array is developed by integrating polyvinylidene fluoride sensing elements with dual‐gate indium‐tin‐zinc oxide thin‐film transistor‐based pixel amplifiers. Direct coupling to the high‐impedance gate minimizes signal loss, enabling twofold voltage amplification and an extended effective relaxation time of ∼4.86 s
Tengteng Lei   +4 more
wiley   +1 more source

SubRidge: a 3-D Subduction-to-Ridge Model with Synthetic Seismic Waveforms for Benchmarking

open access: yesSeismica
We present a geodynamic model that simulates the co-evolution of a mid-ocean ridge and adjacent subduction zones. From the dynamic evolution of this system, we derive spatially variable 21 elastic constants and generate a suite of synthetic seismic ...
Francesco Rappisi   +4 more
doaj   +1 more source

Acoustic Activity of Intergranular Corrosion Sensitized AISI 304L in Double‐Loop Electrochemical Potentiodynamic Reactivation Test

open access: yesMaterials and Corrosion, EarlyView.
Intergranular corrosion of AISI 304L is analyzed, combining DLEPR test and AE. Slow scan rate polarization reveals time‐shifted and frequency‐dependent acoustic emission in the active region of the DLEPR curve, allowing a separation between passive oxide rupture, intergranular corrosion and pitting. ABSTRACT Intergranular corrosion (IGC) susceptibility
Alexander Kreisch   +2 more
wiley   +1 more source

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