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The likelihood of a subglacial lake beneath Amundsenisen Plateau at Southern Spitzbergen, Svalbard, pointed out by the flat signal within the Ground Penetrating Radar (GPR) remote survey of the area, is justified, here, via numerical simulation.
This investigation has been developed under the… |
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In this paper, we discuss the convergence of an Algebraic MultiGrid
(AMG) method for general symmetric positive-definite matrices. The
method relies on an aggregation algorithm, named coarsening based on
compatible weighted matching, which exploits the interplay between the
principle of compatible… |
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This paper describes a signal processing application an embedded hardware platform, based on Hilbert transform method for demodulation of digital signals. |
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A novel model is here introduced for theSOC change indexdefinedas the normalized difference between the actual Soil Organic Carbon and thevalue assumed at an initial reference year. It is tailored on the RothC carbonmodel dynamics and assumes as baseline the value of the SOC… |
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Electrical source imaging (ESI) aims at reconstructing the electrical brain activity from
measurements of the electric field on the scalp. Even though the localization of single focal
sources should be relatively straightforward, different methods provide diverse solutions due
to the different… |
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In this paper, we aim at developing new methods to join machine learning techniques and macroscopic
differential models for vehicular traffic estimation and forecast. It is well known that data-driven and model-
driven approaches have (sometimes complementary) advantages and drawbacks. We consider… |
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The melting of glaciers coming with climate change threatens the heritage of the last glaciation of Europe likely contained in subglacial lakes in Greenland and Svalbard. This aspect urges specialists to focus their studies (theoretical, numerical and on-field) on such fascinating objects. Along… |
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Linear solvers for large and sparse systems are a key element of scientific applications, and their efficient implementation is necessary to harness the computational power of current computers. Algebraic Multigrid (AMG) Preconditioners are a popular ingredient of such linear solvers; this is the… |
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In this paper we propose a new approach to detect clusters in undirected graphs with attributed vertices. The aim is to group vertices which are similar
not only in terms of structural connectivity but also in terms of attribute values.
We incorporate structural and attribute similarities between… |
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The diffusive behaviour of simple random-walk proposals of many Markov Chain
Monte Carlo (MCMC) algorithms results in slow exploration of the state space making inefficient
the convergence to a target distribution. Hamiltonian/Hybrid Monte Carlo (HMC), by introducing fictious momentum variables,… |
