Results 1 to 10 of about 724,897 (308)

A multimodal fusion method for Alzheimer’s disease based on DCT convolutional sparse representation

open access: yesFrontiers in Neuroscience, 2023
IntroductionThe medical information contained in magnetic resonance imaging (MRI) and positron emission tomography (PET) has driven the development of intelligent diagnosis of Alzheimer’s disease (AD) and multimodal medical imaging. To solve the problems
Guo Zhang   +8 more
doaj   +1 more source

Cops and Robbers on Dynamic Graphs: Offline and Online Case [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2023
We examine the classic game of Cops and Robbers played on models of dynamic graphs, that is, graphs evolving over discrete time steps. At each time step, a graph instance is generated as a subgraph of the underlying graph of the model.
Stefan Balev   +4 more
doaj   +1 more source

Enhanced Root-MUSIC Algorithm Based on Matrix Reconstruction for Frequency Estimation

open access: yesSensors, 2023
In recent years, frequency-modulated continuous wave (FMCW) radar has been widely used in automatic driving, settlement monitoring and other fields. The range accuracy is determined by the estimation of the signal beat frequency.
Yingjie Zhu   +3 more
doaj   +1 more source

A Novel Texture Extraction-Based Compressive Sensing for Lung Cancer Classification

open access: yesJournal of Medical Signals and Sensors, 2022
Background: Lung cancer images require large memory storage and transmission bandwidth for sending the data. Compressive sensing (CS), as a method with a statistical approach in signal sampling, provides different output patterns based on information ...
Indrarini Dyah Irawati   +4 more
doaj   +1 more source

Enhancing genomic mutation data storage optimization based on the compression of asymmetry of sparsity

open access: yesFrontiers in Genetics, 2023
Background: With the rapid development of high-throughput sequencing technology and the explosive growth of genomic data, storing, transmitting and processing massive amounts of data has become a new challenge.
Youde Ding   +10 more
doaj   +1 more source

Sparse HJ Biplot: A New Methodology via Elastic Net

open access: yesMathematics, 2021
The HJ biplot is a multivariate analysis technique that allows us to represent both individuals and variables in a space of reduced dimensions. To adapt this approach to massive datasets, it is necessary to implement new techniques that are capable of ...
Mitzi Cubilla-Montilla   +3 more
doaj   +1 more source

GNSS Signal Acquisition Algorithm Based on Two-Stage Compression of Code-Frequency Domain

open access: yesApplied Sciences, 2022
The recently-emerging compressed sensing (CS) theory makes GNSS signal processing at a sub-Nyquist rate possible if it has a sparse representation in certain domain.
Fangming Zhou   +6 more
doaj   +1 more source

A Sparse Denoising-Based Super-Resolution Method for Scanning Radar Imaging

open access: yesRemote Sensing, 2021
Scanning radar enables wide-range imaging through antenna scanning and is widely used for radar warning. The Rayleigh criterion indicates that narrow beams of radar are required to improve the azimuth resolution.
Qiping Zhang   +4 more
doaj   +1 more source

Impact of Sparse and Dense Deployment of Nodes Under Different Propagation Models in Manets

open access: yesAdvances in Distributed Computing and Artificial Intelligence Journal, 2020
Mobile Ad-hoc Network (MANET) is the most emerging and fast-expanding technology in the last two decades. One of the major issues and challenging areas in MANET is the process of routing due to dynamic topologies and high mobility of mobile nodes.
Altaf Hussain   +3 more
doaj   +1 more source

Orbit Determination Using SLR Data for STSAT-2C:Short-arc Analysis [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2015
In this study, we present the results of orbit determination (OD) using satellite laser ranging (SLR) data for the Science and Technology Satellite (STSAT)-2C by a short-arc analysis.
Young-Rok Kim   +3 more
doaj   +1 more source

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