Results 1 to 10 of about 231,210 (123)

Comparison of correlation analysis techniques for irregularly sampled time series [PDF]

open access: yesNonlinear Processes in Geophysics, 2011
Geoscientific measurements often provide time series with irregular time sampling, requiring either data reconstruction (interpolation) or sophisticated methods to handle irregular sampling.
K. Rehfeld   +3 more
doaj   +5 more sources

Data Reconstruction-Based Two-Step Non-Intrusive Reduced-Order Modeling Using Fourier Transform and Interpolations

open access: yesMathematics, 2022
This study presents a data reconstruction-based two-step non-intrusive reduced-order modeling (ROM) based on discrete Fourier transformation (DFT) and proper orthogonal decomposition-radial basis function (POD-RBF) interpolation.
Jonggeon Lee, Euiyoung Kim, Jaehun Lee
doaj   +1 more source

Rotation-Angle Solution and Singularity Handling of Five-Axis Machine Tools for Dual NURBS Interpolation

open access: yesMachines, 2023
Dual NURBS interpolation has been proven an essential technique for high-speed precision machining of complex surfaces. The solution of rotation angles and their derivatives is the basis of kinematic transformation and feedrate optimization in dual NURBS
Pengpeng Sun   +4 more
doaj   +1 more source

Non-rigid Multi-Modal Medical Image Registration Based on Improved Maximum Mutual Information PV Image Interpolation Method

open access: yesFrontiers in Public Health, 2022
With the continuous improvement of medical imaging equipment, CT, MRI and PET images can obtain accurate anatomical information of the same patient site.
Liting He
doaj   +1 more source

Raster data projection transformation based-on Kriging interpolation approximate grid algorithm

open access: yesAlexandria Engineering Journal, 2021
To solve the problems of small area, slow calculation speed and low precision in the projection transformation algorithm of raster data, the idea of using Kriging interpolation approximate grid algorithm for raster data projection transformation is ...
Junzhen Meng
doaj   +1 more source

Conformal and empirical transformation between the PL-ETRF89 and PL-ETRF2000 reference frames using the new adjustment of the former Polish I class triangulation network [PDF]

open access: yesGeodesy and Cartography, 2021
The European reference frame ETRF2000 was introduced on the territory of Poland on 1 July 2013, named PL-ETRF2000, as a result of the appropriate measurement campaign 2008-2011.
Roman Kadaj
doaj   +1 more source

Uzbekistan's coordinate system transformation from CS42 to WGS84 using distortion grid model

open access: yesGeodesy and Geodynamics, 2022
Currently, a non-geocentric geodetic coordinate system introduced in 1942 (CS42), based on the Krasovsky ellipsoid and the Baltic system of normal heights introduced in 1977, is used for geodetic works in the Republic of Uzbekistan.
Dilbarkhon Fazilova
doaj   +1 more source

PoD: A Web Tool for Population Downscaling Using Areal Interpolation and Volunteered Geographic Information

open access: yesEuropean Journal of Geography, 2023
Population data are commonly sourced from censuses, and to meet confidentiality requirements, they are spatially aggregated into standardized enumeration units.
Marios Batsaris   +3 more
doaj   +1 more source

Verification of Programs by Combining Iterated Specialization with Interpolation [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2014
We present a verification technique for program safety that combines Iterated Specialization and Interpolating Horn Clause Solving. Our new method composes together these two techniques in a modular way by exploiting the common Horn Clause representation
Emanuele De Angelis   +3 more
doaj   +1 more source

Space-Time Transfinite Interpolation of Volumetric Material Properties [PDF]

open access: yes, 2014
The paper presents a novel technique based on extension of a general mathematical method of transfinite interpolation to solve an actual problem in the context of a heterogeneous volume modelling area.
Adzhiev, Valery   +4 more
core   +1 more source

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