Results 21 to 30 of about 253,991 (289)
Royal Society Open Science, 2021 Many physiological, biomechanical, evolutionary and clinical studies that explore skeletal structure and function require successful separation of trabecular from cortical compartments of a bone that has been imaged by X-ray micro-computed tomography ...
Eva C. Herbst +5 more
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Radon needlet thresholding [PDF]
, 2012 We provide a new algorithm for the treatment of the noisy inversion of the Radon transform using an appropriate thresholding technique adapted to a well-chosen new localized basis. We establish minimax results and prove their optimality.
Kerkyacharian, Gerard +2 more
core +6 more sources
On false discovery rate thresholding for classification under sparsity [PDF]
, 2012 We study the properties of false discovery rate (FDR) thresholding, viewed as a classification procedure. The "0"-class (null) is assumed to have a known density while the "1"-class (alternative) is obtained from the "0"-class either by translation or by
Neuvial, Pierre, Roquain, Etienne
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Journal of Marine Science and Engineering, 2023 Satellite image analysis is a potentially powerful tool for monitoring coastal shoreline positions. This study explores the use of multi-temporal, dual-polarised Sentinel-1 GRD synthetic aperture radar (SAR) imagery with a spatial resolution of 10 m for ...
Emmanuel Chigozie Dike +2 more
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Anomaly Detection in Multichannel Data Using Sparse Representation in RADWT Frames
Mathematics, 2021 We introduce a new methodology for anomaly detection (AD) in multichannel fast oscillating signals based on nonparametric penalized regression. Assuming the signals share similar shapes and characteristics, the estimation procedures are based on the use ...
Daniela De Canditiis, Italia De Feis
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IoT-Based Information System for Healthcare Application: Design Methodology Approach
Applied Sciences, 2017 Over the last few decades, life expectancy has increased significantly. However, elderly people who live on their own often need assistance due to mobility difficulties, symptoms of dementia or other health problems.
Damian Dziak +2 more
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Global and Quadratic Convergence of Newton Hard-Thresholding Pursuit [PDF]
, 2020 Algorithms based on the hard thresholding principle have been well studied with sounding theoretical guarantees in the compressed sensing and more general sparsity-constrained optimization.
Qi, Hou-Duo +2 more
core +1 more source
Optimization of 2D CT Data Sets for Three-Dimensional [PDF]
, 1993 Computer-generated anatomic modeling using radiologic data is a well-known entity. Currently, state of the art 3D modeling systems lack the variable thresholding, user interactive, capabilities of 3D imaging software.1 We investigated clinical ...
Levy, Richard A.
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Frontiers in Marine ScienceParticle size spectra, describing particle abundance as a function of size, are essential for understanding marine ecosystem structure and biogeochemical processes. The slopes of size spectra provide insights into ecosystem characteristics.
Marika Takeuchi +7 more
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Locally Adaptive Tree-Based Thresholding Using the treethresh Package in R
Journal of Statistical Software, 2017 This paper introduces the treethresh package offering accurate estimation, via thresholding, of potentially sparse heterogeneous signals and the denoising of images using wavelets.
Ludger Evers, Tim Heaton
doaj +1 more source