Results 41 to 50 of about 366,110 (198)

JIGSAW-GEO (1.0): locally orthogonal staggered unstructured grid generation for general circulation modelling on the sphere [PDF]

open access: yes, 2017
An algorithm for the generation of non-uniform, locally-orthogonal staggered unstructured spheroidal grids is described. This technique is designed to generate very high-quality staggered Voronoi/Delaunay meshes appropriate for general circulation ...
Engwirda, Darren
core   +2 more sources

Geometric models of matter [PDF]

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
Inspired by soliton models, we propose a description of static particles in terms of Riemannian 4-manifolds with self-dual Weyl tensor. For electrically charged particles, the 4-manifolds are non-compact and asymptotically fibred by circles over physical 3-space. This is akin to the Kaluza–Klein description of electromagnetism, except that
Atiyah, M. F.   +2 more
openaire   +2 more sources

Spatial guided image captioning: Guiding attention with object's spatial interaction

open access: yesIET Image Processing
Nowadays relational position embedding is widely used in many large multi‐modal models. It begins with relational captioning (a branch of image captioning) and contains two procedures: geometric modelling and prior attention.
Runyan Du   +4 more
doaj   +1 more source

Analytical modelling of perforated geometrical domains by the R-functions

open access: yesMathematical Modelling and Analysis, 2020
This paper deals with the construction of boundary equations for geometric domains with perforation. Different types of perforated geometric domains are considered. The R-functions method for analytical modelling of perforated geometrical domains is used.
Yuriy Semerich
doaj   +1 more source

A quintessentially geometric model [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2006
11 pages, 3 figures.
Gumjudpai, Burin   +2 more
openaire   +2 more sources

From Data Surveying to the Geometrical Analysis of Historical Constructive Wooden Ceiling Structures: A Renaissance Villa in the North of Italy

open access: yesComputers
Villa Cicogna Mozzoni, located in Bisuschio near Varese and Lake Lugano, on the border between Lombardy and Switzerland, has origins dating back to the 1540s as a hunting lodge owned by the Mozzoni family.
Daniela Oreni
doaj   +1 more source

Analysis of Geometric Primitives in Quantitative Structure Models of Tree Stems

open access: yesRemote Sensing, 2015
One way to model a tree is to use a collection of geometric primitives to represent the surface and topology of the stem and branches of a tree. The circular cylinder is often used as the geometric primitive, but it is not the only possible choice.
Åkerblom Markku   +3 more
doaj   +1 more source

Novel Degree-Based Topological Descriptors of Carbon Nanotubes

open access: yesJournal of Chemistry, 2021
The most significant tool of mathematical chemistry is the numerical descriptor called topological index. Topological indices are extensively used in modelling of chemical compounds to analyse the studies on quantitative structure activity/property ...
M. C. Shanmukha   +4 more
doaj   +1 more source

AUTOMATED MODELING OF 3D BUILDING ROOFS USING IMAGE AND LIDAR DATA [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
In this work, an automated approach for 3D building roof modelling is presented. The method consists of two main parts, namely roof detection and 3D geometric modelling.
N. Demir, E. Baltsavias
doaj   +1 more source

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