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Categorical Geometry and Integration Without Points [PDF]

open access: yesApplied Categorical Structures, 2012
The theory of integration over infinite-dimensional spaces is known to encounter serious difficulties. Categorical ideas seem to arise naturally on the path to a remedy. Such an approach was suggested and initiated by Segal in his pioneering article \cite{segal}.
Kriz, Igor, Pultr, Aleš
openaire   +2 more sources

ASSESSING THE ALIGNMENT BETWEEN GEOMETRY AND COLORS IN TLS COLORED POINT CLOUDS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
The integration of the color information from RGB cameras with the point cloud geometry is used in numerous applications. However, little attention has been paid on errors that occur when aligning colors to points in terrestrial laser scanning (TLS ...
Z. Wang, M. Varga, T. Medić, A. Wieser
doaj   +1 more source

Polylidar3D-Fast Polygon Extraction from 3D Data

open access: yesSensors, 2020
Flat surfaces captured by 3D point clouds are often used for localization, mapping, and modeling. Dense point cloud processing has high computation and memory costs making low-dimensional representations of flat surfaces such as polygons desirable.
Jeremy Castagno, Ella Atkins
doaj   +1 more source

True coincidence summing correction factor for point source geometry with PHITS

open access: yesNuclear Engineering and Technology, 2023
In this study, it has been shown that the true coincidence summing correction factor can be obtained for the first time using the PHITS Monte Carlo program.
Esra Uyar
doaj   +1 more source

Geometrically rational real conic bundles and very transitive actions [PDF]

open access: yes, 2009
In this article we study the transitivity of the group of automorphisms of real algebraic surfaces. We characterize real algebraic surfaces with very transitive automorphism groups.
Biswas   +8 more
core   +8 more sources

Geometry Students’ Arguments About a 1-Point Perspective Drawing

open access: yesREDIMAT, 2017
The practice of formulating and justifying claims is a fundamental aspect of doing mathematics, and in geometry, students’ use of diagrams is integral to how they establish arguments. We applied Toulmin’s model to examine 23 geometry students’ arguments
Anna F. DeJarnette, Gloriana Gonzalez
doaj   +1 more source

Efficient Large-Scale Point Cloud Geometry Compression

open access: yesSensors
Due to the significant bandwidth and memory requirements for transmitting and storing large-scale point clouds, considerable progress has been made in recent years in the field of large-scale point cloud geometry compression.
Shiyu Lu, Cheng Han, Huamin Yang
doaj   +1 more source

2D Triangulation of Signals Source by Pole-Polar Geometric Models

open access: yesSensors, 2019
The 2D point location problem has applications in several areas, such as geographic information systems, navigation systems, motion planning, mapping, military strategy, location and tracking moves.
Aleksandro Montanha   +3 more
doaj   +1 more source

A Geometry Feature Aggregation Method for Point Cloud Classification and Segmentation

open access: yesIEEE Access, 2021
In spite of the good performance of convolutional neural network (CNN) and graph neural network (GNN) in 3D point cloud classification and segmentation at present, to aggregate local information of point clouds and improve the robustness of geometric ...
Yong Wang, Chenke Yue, Xintong Tang
doaj   +1 more source

Wormhole inspired by non-commutative geometry

open access: yesPhysics Letters B, 2015
In the present Letter we search for a new wormhole solution inspired by noncommutative geometry with the additional condition of allowing conformal Killing vectors (CKV).
Farook Rahaman   +3 more
doaj   +1 more source

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