Results 21 to 30 of about 333,618 (298)

WTLS iterative algorithm of 3D similarity coordinate transformation based on Gibbs vectors

open access: yesEarth, Planets and Space, 2020
The 3D similarity coordinate transformation is fundamental and frequently encountered in many areas of work such as geodesy, engineering surveying, LIDAR, terrestrial laser scanning, photogrammetry, machine vision, etc.
Huaien Zeng   +3 more
doaj   +1 more source

Grid Model for High-accuracy Coordinate Transformation of China Geodetic Coordinate System 2000 [PDF]

open access: yesJournal of Geodesy and Geoinformation Science, 2019
After implementing CGCS2000, establishing grid models for high-accuracy coordinate transformation which are mainly used to transform border lines and coordinate grids of topographic maps becomes an important issue in mapping applications. Consequently, a
Zhiping LU,Ziqing WEI,Jun LI,Chong GUO
doaj   +1 more source

Grey Time Power Model with Caputo Fractional Derivative

open access: yesFractal and Fractional, 2023
In this paper, the inverse cumulative grey time power model with a Caputo fractional derivative is established, and the solution to the whitening equation is given by the Laplace transform.
Pan Hu, Chuan-Yun Gu
doaj   +1 more source

Impact of Data Transformation: An ECG Heartbeat Classification Approach

open access: yesFrontiers in Digital Health, 2020
Cardiovascular diseases continue to be a significant global health threat. The electrocardiogram (ECG) signal is a physiological signal that plays a major role in preventing severe and even fatal heart diseases. The purpose of this research is to explore
Yongbo Liang   +9 more
doaj   +1 more source

Why Should We Test the Wideband Transformation Accuracy of Inductive Current Transformers?

open access: yesEnergies, 2022
Inductive current transformers are characterized by different transformation accuracies for higher harmonics of distorted primary currents. Therefore, it is highly required to perform the tests of their metrological properties to choose the best unit ...
Ernest Stano   +2 more
doaj   +1 more source

The Legal Term between Stability and Transformation: The Problem of Term Formulation Accuracy [PDF]

open access: yesمجلة الاجتهاد للدراسات القانونية والاقتصادية, 2022
The study aims to shed light on the conditions of the formulation of the scientific term in general and the legal term in particular based on the linguistic field as a linguistic text formulated in the context of a holistic discourse, and which is also ...
قرماط عبد القادر   +1 more
doaj   +1 more source

Polypoint transformations algorithm accuracy increase [PDF]

open access: yesAPPLIED GEOMETRY AND ENGINEERING GRAPHICS, 2020
Deformation simulation methods allow to show the deformation processes of the objects without certain kind of functional description by defining dynamic deformation parameters. Deformation is applied to the space where object exists, and allows to retrieve the accurate changes of an object. The one of such models class is policoordinate methods, namely,
Sydorenko, Iuliia, Zalevska, Olha
openaire   +2 more sources

On the accuracy of numerical Fourier transforms

open access: yesJournal of Computational Physics, 1974
Journal of Computational Physics 16 (1974) 396-400. doi:10.1016/0021-9991(74)90049-7 ; Received by publisher: 1973-12-18 ; Harvest Date: 2016-01-04 12:20:03 ; DOI:10.1016/0021-9991(74)90049-7 ; Page Range: 396 ...
Department of Physics University of Florida Gainesville, Florida 32611, USA ( host institution )   +1 more
openaire   +3 more sources

The generalized Radon transform: Sampling, accuracy and memory considerations [PDF]

open access: yesPattern Recognition, 2005
The generalized Radon (or Hough) transform is a well-known tool for detecting parameterized shapes in an image. The Radon transform is a mapping between the image space and a parameter space. The coordinates of a point in the latter correspond to the parameters of a shape in the image.
Cris L. Luengo Hendriks   +3 more
openaire   +2 more sources

The Effects of Grid Accuracy on Flow Simulations: A Numerical Assessment

open access: yesFluids, 2020
High-quality, accurate grid generation is a critical challenge in the computational simulation of fluid flows around complex geometries. In particular, the accuracy of the grids is an effective factor in order to achieve a successful numerical simulation.
Majid Allahyari   +2 more
doaj   +1 more source

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