Results 71 to 80 of about 4,215 (185)

Imaging Processing of 3D DAS‐VSP Data Jointly Acquired With a High‐Density OBN Survey in the Middle East

International Journal of Geophysics, Volume 2025, Issue 1, 2025.
Joint surface and borehole seismic are a 3D surface‐and‐borehole seismic exploration method of the simultaneous acquisition of onshore or offshore 3D seismic and VSP (vertical seismic profiling) data using the same sources. When acquiring surface 2D or 3D seismic data in the field, simultaneously acquired 2D or 3D distributed acoustic sensing VSP or ...
Shaohua Zhang, Gang Yu, Haibo Liu, Yu Zhang, Hui Chen, Guillaume Cambois, James Cowell, Jane Mason, Muhammad Waqas, Xiang Li, Lian Duan, Fei Li, Yuanzhong Chen, Junjun Wu, Arkoprovo Biswas   +14 more
wiley   +1 more source

Underdetermined Source Separation of Bearing Faults Based on Optimized Intrinsic Characteristic-Scale Decomposition and Local Non-Negative Matrix Factorization

IEEE Access, 2019
Since roller bearing is one of the most vulnerable components, bearing faults usually occur in an unprepared situation with multiple faults, and the quantity of sensors is limited in the real-time working environment, resulting in an underdetermined ...
Yansong Hao, Liuyang Song, Mengyang Wang, Lingli Cui, Huaqing Wang   +4 more
doaj   +1 more source

A fast approach for overcomplete sparse decomposition based on smoothed L0 norm

, 2008
In this paper, a fast algorithm for overcomplete sparse decomposition, called SL0, is proposed. The algorithm is essentially a method for obtaining sparse solutions of underdetermined systems of linear equations, and its applications include ...
Babaie-Zadeh, Massoud, Jutten, Christian, Mohimani, Hossein   +2 more
core   +7 more sources

Vision‐Aided Damage Detection With Convolutional Multihead Self‐Attention Neural Network: A Novel Framework for Damage Information Extraction and Fusion

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
The current application of vibration‐based damage detection is constrained by the low spatial resolution of signals obtained from contact sensors and an overreliance on hand‐engineered damage indices. In this paper, we propose a novel vision‐aided framework featuring convolutional multihead self‐attention neural network (CMSNN) to deal with damage ...
Yiming Zhang, Zili Xu, Guang Li, Jun Wang, Ka-Veng Yuen   +4 more
wiley   +1 more source

Underdetermined blind source separation based on null-space representation and maximum likelihood

Tongxin xuebao, 2012
Aiming to the estimation of source numbers,mixing mat ix and source signals under underdetermined case,and a method of underdetermined blind source separation with an unknown number of sources was proposed.Firstly,an algorithm based on S transforms and ...
Rong-jie WANG, Yi-ju ZHAN, Hai-feng ZHOU
doaj   +2 more sources

A Maximum Likelihood Estimation of Vocal-Tract-Related Filter Characteristics for Single Channel Speech Separation

EURASIP Journal on Audio, Speech, and Music Processing, 2007
We present a new technique for separating two speech signals from a single recording. The proposed method bridges the gap between underdetermined blind source separation techniques and those techniques that model the human auditory system, that is ...
Dansereau Richard M, Radfar Mohammad H, Sayadiyan Abolghasem   +2 more
doaj  

On The Positive Definiteness of Polarity Coincidence Correlation Coefficient Matrix

, 2008
Polarity coincidence correlator (PCC), when used to estimate the covariance matrix on an element-by-element basis, may not yield a positive semi-definite (PSD) estimate. Devlin et al.
Aref, Mohammad Reza, Haddadi, Farzan, Nayebi, Mohammad Mahdi   +2 more
core   +1 more source

The art of thinking as an intersubjective practice: Eloquence, affect, and association in the Port‐Royal Logic

European Journal of Philosophy, Volume 32, Issue 4, Page 1015-1032, December 2024.
Abstract In the Port‐Royal Logic, Arnauld and Nicole argue that eloquence plays a crucial role in the cultivation of the art of thinking. In this essay, we demonstrate that Arnauld and Nicole's reflections on eloquence exemplify the need to reconceive the larger framework in which Cartesian theories of ideas operate.
Laura Kotevska, Anik Waldow
wiley   +1 more source

Single Channel Blind Source Separation for Wind Turbine Aeroacoustics Signals Based on Variational Mode Decomposition

IEEE Access, 2018
The acquisition of aeroacoustics signals of wind turbines is of great significance in environmental noise assessment and fault monitoring of blades. The single acoustic sensor is simpler and more flexible than the acoustic sensors array but it lacks ...
Ya'nan Zhang, Shengbo Qi, Lin Zhou
doaj   +1 more source

Making sense of critical theory's economic gap

Constellations, Volume 32, Issue 1, Page 83-96, March 2025.
Lillian Cicerchia
wiley   +1 more source