Results 81 to 90 of about 3,752,834 (199)
A Bioinspired Underwater Soft Robot for Active Intravesical Liquid Delivery and Mixing
Advanced Intelligent Systems, EarlyView.A bioinspired underwater soft robot is reported that integrates an elastic strain energy‐driven soft robotic pump with a programmable flexible magnetic valve, enabling remotely controlled, programmable, and sustained liquid release and mixing. This functionality is enabled by the synergistic integration of elastic strain energy‐driven pumping and ...
Jacob Katona +7 more
wiley +1 more source
Normalized Nonzero-Lag Crosscorrelation Elastic Full Waveform Inversion
, 2018 Conventional L2 norm based full waveform inversion usually has more than one local minima and is also sensitive to noise in the observed data. The Earth is at least attenuative, and thus, a pixel-to-pixel fitting of the waveform is not feasible in ...
Z. Wu +5 more
core +1 more source
Elastic reflection waveform inversion with variable density [PDF]
, 2017 Elastic full waveform inversion (FWI) provides a better description of the subsurface than those given by the acoustic assumption. However it suffers from a more serious cycle skipping problem compared with the latter. Reflection waveform inversion (RWI)
Li, Yuanyuan +3 more
core +1 more source
IEEE AccessIn this study, we discuss a mathematical framework to handle the inverse problem for the applications of partial differential equations (PDEs). In particular, we focus on wave equations and attempt to identify the wave parameters such as wave velocity ...
Alireza Pakravan
doaj +1 more source
Advanced Intelligent Systems, EarlyView.An intelligent piezoelectric vibration control system integrating self‐sensing, autonomous operation, and adaptive bias‐flip synchronized switching damping (SSD) is developed. The system detects vibration extrema, executes synchronized switching control, and autonomously establishes the bias voltage without external sensing instruments, achieving ...
Hao Tang, Weiqun Liu, Guobiao Hu
wiley +1 more source
Elastic Micro-Seismic Full Waveform Inversion with an Unknown Source
, 2018 "Using full waveform inversion (FWI) to locate microseismic sources and image microseismic events allows for a data-driven process (free of picking) that utilizes the full wavefield.
H. Wang +3 more
core +1 more source
An efficient method of 3-D elastic full waveform inversion using a finite-difference injection method for time-lapse imaging [PDF]
, 2015 International audienceSeismic full waveform inversion is an objective method to estimate elastic properties of the subsurface and is an important area of research, particularly in seismic exploration community.
Singh, Satish, C +5 more
core +1 more source
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