Results 21 to 30 of about 182,993 (316)

Quasi-interpolations with interpolation property

open access: yesJournal of Computational and Applied Mathematics, 2004
AbstractInterpolation and quasi-interpolation are very important methods for function approximation. But both of them have their respective disadvantages. The interpolation function can fit the given sample points, but some oscillation may arise as in the case of the Lagrange interpolation.
Jing-Xin Wang, Ren-Hong Wang
openaire   +2 more sources

The Impact of Soil Erosion on the Spatial Distribution of Soil Characteristics and Potentially Toxic Element Contents in a Sloping Vineyard in Tállya, Ne Hungary

open access: yesJournal of Environmental Geography, 2021
Soil erosion is a main problem in sloping vineyards, which can dramatically affect soil quality and fertility. The present study aimed to evaluate the spatial patterns of selected physico-chemical soil characteristics and the soil’s potentially toxic ...
Manaljav Samdandorj   +6 more
doaj   +1 more source

Application of transport-based metric for continuous interpolation between cryo-EM density maps

open access: yesAIMS Mathematics, 2022
Cryogenic electron microscopy (cryo-EM) has become widely used for the past few years in structural biology, to collect single images of macromolecules "frozen in time".
Arthur Ecoffet   +4 more
doaj   +1 more source

An Innovative Calibration Scheme for Interharmonic Analyzers in Power Systems under Asynchronous Sampling

open access: yesEnergies, 2018
Power-quality analyzers are commonly used in power systems to estimate waveform distortion, including the parameters of harmonics/interharmonics. In our study, a calibration scheme was developed and verified.
Qiang Guo   +3 more
doaj   +1 more source

The Use of an Artificial Neural Network to Process Hydrographic Big Data during Surface Modeling

open access: yesComputers, 2019
At the present time, spatial data are often acquired using varied remote sensing sensors and systems, which produce big data sets. One significant product from these data is a digital model of geographical surfaces, including the surface of the sea floor.
Marta Wlodarczyk-Sielicka   +1 more
doaj   +1 more source

A novel spectral peak estimator based on underdetermined equation

open access: yesElectronics Letters, 2022
This letter develops a fast spectral peak estimation method, which is inspired by the theory of compressed sensing (CS). In this work, the measurement procedure of the CS is employed to construct an underdetermined equation, and then a low complexity ...
Bingbing Chen, Yufa Sun
doaj   +1 more source

Assessment of Ordinary Kriging and Inverse Distance Weighting Methods for Modeling Chromium and Cadmium Soil Pollution in E-Waste Sites in Douala, Cameroon [PDF]

open access: yesJournal of Health and Pollution, 2020
Background. Several studies have demonstrated that chromium (Cr) and cadmium (Cd) have adverse impacts on the environment and human health. These elements are present in electronic waste (e-waste) recycling sites.
Romaric Emmanuel Ouabo   +2 more
doaj   +1 more source

On polyharmonic interpolation

open access: yesJournal of Mathematical Analysis and Applications, 2007
In the present paper we will introduce a new approach to multivariate interpolation by employing polyharmonic functions as interpolants, i.e. by solutions of higher order elliptic equations. We assume that the data arise from $C^{\infty}$ or analytic functions in the ball $B_{R}.$ We prove two main results on the interpolation of $C^{\infty}$ or ...
Werner Haußmann, Ognyan Kounchev
openaire   +3 more sources

Network Interpolation

open access: yesSIAM Journal on Mathematics of Data Science, 2020
Given a set of snapshots from a temporal network we develop, analyze, and experimentally validate a so-called network interpolation scheme. Our method allows us to build a plausible, albeit random, sequence of graphs that transition between any two given graphs.
Thomas Reeves   +2 more
openaire   +2 more sources

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

open access: yesHigh Voltage, 2021
Partial discharge (PD) is one of the main causes rendering the deterioration of the insulation state in gas‐insulated transmission line (GIL). Accurate and timely localization of the PD source is essential to ensure the safe and stable operation of the ...
Yiming Zang   +5 more
doaj   +1 more source

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