Results 71 to 80 of about 6,466,499 (300)

Novel processing algorithms for efficient dam seepage surveys via improved symmetric multielectrode electrical exploration

open access: yesScientific Reports
To improve the efficiency of geophysical methods, data processing algorithms are often prioritized for enhancement. The novel improved processing and analysis algorithms of the improved multi-electrode electrical exploration methods that we propose ...
Duc Minh Vu   +2 more
doaj   +1 more source

Deep geophysical investigations (DERT and Seismic Reflection) to unravel the Ferrara urban area geology

open access: yesGeomatics, Natural Hazards & Risk
Exploring the ‘fragile crust of our planet’ is crucial for human survival holding an immense social and economic significance. Therefore, innovative approaches become of utmost importance for obtaining precise subsoil models in urban areas making the ...
Enzo Rizzo   +11 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Changes in Vegetation Distribution around the King Sejong Station in Antarctica: A Comprehensive Analysis of Time-Lapse Electrical Resistivity Data, Meteorological Data, and Vegetation Data [PDF]

open access: yesLithosphere
The impact of buildings around the King Sejong Station (KSS), South Korea’s first scientific station in Antarctica, has locally altered snowfall accumulation and vegetation distribution.
Kwansoo Kim   +4 more
doaj   +1 more source

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir   +2 more
wiley   +1 more source

APPLICATION OF GEOELECTRICAL TOMOGRAPHY FOR SUBSURFACE CHARACTERIZATION IN CONSTRUCTION

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering
This paper presents the application of geoelectrical tomography with a Wenner electrode array to characterize the subsurface conditions at the site of a planned commercial building in Kakanj.
Ekrem Bektašević   +3 more
doaj   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

Electrical anisotropy calculation of the continental crust by resistor network-based circuit simulationsGitHub

open access: yesApplied Computing and Geosciences
Electrical anisotropy has been broadly observed by magnetotelluric (MT) surveys in the continental crust. It is proposed to be caused by rock microfabrics, lithologic layering, or oriented alignment of fluid or melt in rocks, whereas the validity of ...
Song Luo, Haiying Hu, Lidong Dai
doaj   +1 more source

Comparison of laboratory and field electrical resistivity measurements of a gypsum rock for mining prospection applications

open access: yesInternational Journal of Mining Science and Technology, 2019
Geophysical surveys are frequently applied in mining prospection to detect the presence and volume of ore bodies of different nature. Particularly, in gypsum ore bodies exploitation, electrical resistivity measurements are usually the most used ...
Chiara Caselle   +2 more
doaj   +1 more source

RECONSTRUCTION AND VISUALIZATION OF THE HEART ELECTRICAL ACTIVITY USING A MULTIELECTRODE SYSTEM FOR ELECTROCARDIAGNOSTICS

open access: yesИзмерение, мониторинг, управление, контроль, 2022
Background. We consider the medical information system for non-invasive electrocardiodiagnostics, based on the registration and processing of electrocardiosignals from multielectrode leads.
M.N. Kramm   +4 more
doaj   +1 more source

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