Results 21 to 30 of about 977,147 (296)

Subsampling Approaches for Compressed Sensing with Ultrasound Arrays in Non-Destructive Testing

open access: yesSensors, 2020
Full Matrix Capture is a multi-channel data acquisition method which enables flexible, high resolution imaging using ultrasound arrays. However, the measurement time and data volume are increased considerably.
Eduardo Pérez   +3 more
doaj   +1 more source

Modeling and Imaging of Ultrasonic Array Inspection of Side Drilled Holes in Layered Anisotropic Media

open access: yesSensors, 2021
There has been an increase in the use of ultrasonic arrays for the detection of defects in composite structures used in the aerospace industry. The response of a defect embedded in such a medium is influenced by the inherent anisotropy of the bounding ...
Chirag Anand   +2 more
doaj   +1 more source

Suppressing artifacts in the total focusing method using the directivity of laser ultrasound

open access: yesPhotoacoustics, 2023
Based on a synthesized laser ultrasonic array, full matrix capture can be used to acquire data, which can then be post-processed using the total focusing method.
Huabin He   +5 more
doaj   +1 more source

Estimation of Full Dynamic Parameters of Large Space Debris Based on Rope Net Flexible Collision and Vision

open access: yesActuators, 2023
The identification of space debris’s dynamic parameters is a prerequisite for detumbling and capture operations. In this paper, a novel method for identifying dynamic parameters based on the rope net flexible collision and vision data is proposed, which ...
Chao Tang   +5 more
doaj   +1 more source

A Gaussian Beam Based Recursive Stiffness Matrix Model to Simulate Ultrasonic Array Signals from Multi-Layered Media

open access: yesSensors, 2020
Ultrasonic testing using arrays is becoming widely used to test composite structures in the Aerospace industry. In recent years, the Full Matrix Capture (FMC) technique has been implemented to extract the signals for post-processing to form an image. The
Chirag Anand   +2 more
doaj   +1 more source

Microbiome Data Analysis by Symmetric Non-negative Matrix Factorization With Local and Global Regularization

open access: yesFrontiers in Molecular Biosciences, 2021
A network is an efficient tool to organize complicated data. The Laplacian graph has attracted more and more attention for its good properties and has been applied to many tasks including clustering, feature selection, and so on.
Junmin Zhao, Yuanyuan Ma, Lifang Liu
doaj   +1 more source

Full-matrix capture and USB3.0 for open platform phased array instruments [PDF]

open access: yesAIP Conference Proceedings, 2016
Nondestructive evaluation (NDE) using ultrasonic waves is an efficient technique to assess industrial component integrity. The use of array probes enables inspection flexibility and advanced imaging techniques such as the total focusing method (TFM).
Gavin Dao   +3 more
openaire   +1 more source

Sampled-Data Synchronization Control for Chaotic Neural Networks With Mixed Delays: A Discontinuous Lyapunov Functional Approach

open access: yesIEEE Access, 2021
The sampled-data synchronization problem of chaotic neural networks with mixed time delays is investigated in this paper. A novel augmented discontinuous Lyapunov-Krasovskii functional (ADLKF) is constructed, which can make full capture the more ...
Quan Hai
doaj   +1 more source

Separation mechanism and experimental investigation of pulsating high gradient magnetic separation

open access: yesResults in Physics, 2023
Pulsating high gradient magnetic separation (PHGMS) has been widely used for separating magnetic minerals in the past decades. In practice, magnetic field and flow field are the main factors that affect the capture of magnetic particles by medium wires ...
Fangping Ye   +4 more
doaj   +1 more source

Estimating Dynamic Traffic Matrices by using Viable Routing Changes [PDF]

open access: yes, 2007
: In this paper we propose a new approach for dealing with the ill-posed nature of traffic matrix estimation. We present three solution enhancers: an algorithm for deliberately changing link weights to obtain additional information that can make the ...
Cruz, R.   +4 more
core   +2 more sources

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