Results 31 to 40 of about 276,818 (169)

On F-inverse covers of inverse monoids

open access: yesJournal of Pure and Applied Algebra, 2006
An inverse monoid \(F\) in which every class with respect to the smallest group congruence has a maximal element in the natural partial order is called an \(F\)-inverse monoid. Such a monoid \(F\) is an \(F\)-inverse cover of an inverse monoid \(M\) if there is an idempotent-separating onto homomorphism \(F\to M\).
Auinger, Karl, Szendrei, Maria
openaire   +3 more sources

Distribution of Vapor and Condensate in a Hydrothermal System: Insights From Self‐Potential Inversion at Mount Tongariro, New Zealand

open access: yesGeophysical Research Letters, 2018
Inversion of self‐potential data for source current density, js, in complex volcanic settings, yields hydrological information without the need for a prior groundwater flow model; js contains information about pH, pore saturation, and permeability, from ...
C. A. Miller   +3 more
doaj   +1 more source

Multifractal Analysis of a Seismic Moment Distribution Obtained From InSAR Inversion

open access: yesEarth and Space Science, 2021
Interferometric synthetic aperture radar (InSAR) interferograms contain valuable information about the fault systems hidden beneath the surface of the Earth.
Cameron Saylor   +2 more
doaj   +1 more source

Inverse melting and inverse freezing: A spin model [PDF]

open access: yesPhysical Review E, 2005
Systems of highly degenerate ordered or frozen state may exhibit inverse melting (reversible crystallization upon heating) or inverse freezing (reversible glass transition upon heating). This phenomena is reviewed, and a list of experimental demonstrations and theoretical models is presented.
Schupper, Nurith, Shnerb, Nadav M.
openaire   +3 more sources

Nonlinear Seismic Signal Denoising Using Template Matching with Time Difference Detection Method

open access: yesRemote Sensing
As seismic exploration shifts towards areas with more complex surface and subsurface structures, the complexity of the geological conditions often results in seismic data with low signal-to-noise ratio. It is therefore essential to implement denoising in
Rongwei Xu   +4 more
doaj   +1 more source

Facies-Constrained Kriging Interpolation Method for Parameter Modeling

open access: yesRemote Sensing
In seismic exploration, establishing a reliable parameter model (such as velocity, density, impedance) is crucial for seismic migration imaging and reservoir characterization.
Zhenbo Nie   +5 more
doaj   +1 more source

Pyroclastic Flow Deposits and InSAR: Analysis of Long-Term Subsidence at Augustine Volcano, Alaska

open access: yesRemote Sensing, 2016
Deformation of pyroclastic flow deposits begins almost immediately after emplacement, and continues thereafter for months or years. This study analyzes the extent, volume, thickness, and variability in pyroclastic flow deposits (PFDs) on Augustine ...
David B. McAlpin   +4 more
doaj   +1 more source

Optimal Regularized Inverse Matrices for Inverse Problems [PDF]

open access: yesSIAM Journal on Matrix Analysis and Applications, 2017
In this paper, we consider optimal low-rank regularized inverse matrix approximations and their applications to inverse problems. We give an explicit solution to a generalized rank-constrained regularized inverse approximation problem, where the key novelties are that we allow for updates to existing approximations and we can incorporate additional ...
Julianne Chung, Matthias Chung
openaire   +3 more sources

Temporal Monitoring of the Soil Freeze-Thaw Cycles over a Snow-Covered Surface by Using Air-Launched Ground-Penetrating Radar

open access: yesRemote Sensing, 2015
We tested an off-ground ground-penetrating radar (GPR) system at a fixed location over a bare agricultural field to monitor the soil freeze-thaw cycles over a snow-covered surface.
Khan Zaib Jadoon   +5 more
doaj   +1 more source

Mapping of Agricultural Subsurface Drainage Systems Using a Frequency-Domain Ground Penetrating Radar and Evaluating Its Performance Using a Single-Frequency Multi-Receiver Electromagnetic Induction Instrument

open access: yesSensors, 2020
Subsurface drainage systems are commonly used to remove surplus water from the soil profile of a poorly drained farmland. Traditional methods for drainage mapping involve the use of tile probes and trenching equipment that are time-consuming, labor ...
Triven Koganti   +5 more
doaj   +1 more source

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