Results 91 to 100 of about 40,315 (288)
Regularized Dual Averaging Image Reconstruction for Full-Wave Ultrasound Computed Tomography
, 2017 Ultrasound computed tomography (USCT) holds great promise for breast cancer screening. Waveform inversion-based image reconstruction methods account for higher order diffraction effects and can produce high-resolution USCT images, but are computationally
Anastasio, Mark A. +4 more
core +1 more source
Ultrasound Modulation of Visual Circuits in Mice Independent of Auditory Confound
Advanced Science, EarlyView.In this study, Qiu et al. found that low‐intensity ultrasound can directly activate sparse ultrasound‐sensitive neurons (UNs) in the primary visual cortex (V1) of deafened mice. The proportion of these sparse UNs is pressure‐dependent. Furthermore, ultrasound modulates visual circuitry with distinct excitatory and inhibitory effects.
Jiaru He +8 more
wiley +1 more source
Inversion Of Travel Time For Velocity [PDF]
, 1983 Common source velocities and borehole compensated (BC) estimates have been used to obtain formation velocity estimates from full waveform acoustic logs (Willis and Toksoz, 1982).
Willis, M.E.
core
Multi-model full-waveform inversion
, 2014 We propose a multi-model formulation of full-waveform inversion that is similar to image decomposition into a "cartoon" and "texture" used in image processing. Inversion problem is formulated as unconstrained multi-norm optimization that can be solved using conventional iterative solvers.
Maharramov, Musa, Biondi, Biondo
openaire +2 more sources
Advanced Science, EarlyView.High electrical performance alone does not guarantee efficient bioelectronic signal transduction. Despite excellent mixed ionic‐electronic conduction, recordings from cardiomyocytes reveal that p(g2T‐TT)‐based OECTs predominantly transduce field potential FP‐like signals due to weak cell‐polymer coupling.
Giulia Zoe Zemignani +10 more
wiley +1 more source
Estimation of poroelastic parameters from seismograms using Biot theory [PDF]
, 2009 We investigate the possibility to extract information contained in seismic waveforms propagating in fluid-filled porous media by developing and using a full waveform inversion procedure valid for layered structures.
De Barros, Louis, Dietrich, Michel
core +2 more sources
Advanced Science, EarlyView.A programmable 2048‐element circular ultrasound array combined with a compact acoustic lens produces a thin “sound sheet” over a large field of view, and records echoes with wide angular diversity across the ring aperture. Coherence‐enhanced beamforming converts full‐matrix data into high‐contrast tomographic slices, delivering near‐diffraction‐limited
Qiu‐De Zhang +11 more
wiley +1 more source
Efficient stochastic Hessian estimation for full waveform inversion [PDF]
, 2013 In this abstract we present a method that allows arbitrary elements of the approximate Hessian to be estimated simultaneously. Preliminary theoretical and numerical investigations suggest that the number of forward models required for this procedure does
Hewett, Russell J. +2 more
core
Reflection full waveform inversion
, 2016 The Full Waveform Inversion (FWI) gradient is composed of a low wavenumber tomographic component and a high wavenumber migration component. A successful application of FWI requires that the low wavenumber parts of the model be recovered before the high wavenumbers.
openaire +3 more sources
Postsynaptic Complexin Mediates Constitutive Exocytosis of Nicotinic Acetylcholine Receptor
Advanced Science, EarlyView.Beyond its established presynaptic role, complexin is identified as a postsynaptic regulator of neurotransmitter receptor trafficking. By promoting constitutive and activity‐dependent exocytosis of nicotinic acetylcholine receptors, complexin controls spontaneous synaptic signaling at the C.
Ya Wang +4 more
wiley +1 more source