Results 91 to 100 of about 655,112 (194)

All nearest neighbor calculation based on Delaunay graphs

open access: yesCoRR, 2018
When we have two data sets and want to find the nearest neighbour of each point in the first dataset among points in the second one, we need the all nearest neighbour operator. This is an operator in spatial databases that has many application in different fields such as GIS and VLSI circuit design.
Nasrin Mazaheri Soudani, Ali Karami
openaire   +2 more sources

Context-Aware DGCN-Based Ship Formation Recognition in Remote Sensing Images

open access: yesRemote Sensing
Ship detection and formation recognition in remote sensing have increasingly garnered attention. However, research remains challenging due to arbitrary orientation, dense arrangement, and the complex background of ships.
Tao Zhang   +5 more
doaj   +1 more source

Effets spatiaux et effets réseau dans l’évaluation d’indicateurs sur les nœuds d’un réseau d’infrastructure

open access: yesCybergeo, 2007
The quantitative study of an infrastructure network in geography often consists in assessing indicators on the network components (nodes and sections). In that respect, the network is modelled by a graph whose vertices and edges respectively correspond ...
Jean-François Gleyze
doaj   +1 more source

Graph Drawing Techniques for Geographic Visualization [PDF]

open access: yes, 2004
Geovisualizers often need to represent data that consists of items related together. Such data sets can be abstracted to a mathematical structure, the graph.
Rodgers, Peter
core  

Unsupervised Plot Morphology Classification via Graph Attention Networks: Evidence from Nanjing’s Walled City

open access: yesLand
Urban plots are pivotal links between individual buildings and the city fabric, yet conventional plot classification methods often overlook how buildings interact within each plot.
Ziyu Liu, Yacheng Song
doaj   +1 more source

Degree four plane spanners: Simpler and better

open access: yesJournal of Computational Geometry, 2017
Let $\mathcal{P}$ be a set of $n$ points embedded in the plane, and let $\mathcal{C}$ be the complete Euclidean graph whose point-set is $\mathcal{P}$. Each edge in $\mathcal{C}$ between two points $p$, $q$ is realized as the line segment $[pq]$ and is ...
Iyad Kanj   +2 more
doaj   +1 more source

Enhancing Multi–Class Prediction of Skin Lesions with Feature Importance Assessment

open access: yesInternational Journal of Applied Mathematics and Computer Science
Numerous image processing techniques have been developed for the identification of various types of skin lesions. In real-world scenarios, the specific lesion type is often unknown in advance, leading to a multi-class prediction challenge.
Paulauskaite-Taraseviciene Agne   +3 more
doaj   +1 more source

Connections between Theta-Graphs, Delaunay Triangulations, and Orthogonal Surfaces

open access: yes, 2010
International audience$\Theta_k$-graphs are geometric graphs that appear in the context of graph navigation. The shortest-path metric of these graphs is known to approximate the Euclidean complete graph up to a factor depending on the cone number $k$ and
Nicolas Bonichon   +7 more
core   +1 more source

A Partial Unit Delaunay Graph with Planar and Spanner for Ad Hoc Wireless Networks

open access: yes, 2011
This paper proposes a new geometry structure, namely Partial unit Delaunay graph (PuDel), to be as the underlying network topology of Ad hoc wireless networks.
Zhi Gang Chen   +3 more
core   +1 more source

Revealing association rules within intricate ecosystems: A spatial co-location mining method based on Geo-Eco knowledge graph

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
The analysis of association rules within ecosystems is crucial for monitoring, managing, and conserving natural resources. As widely adopted approaches for this task, geospatial methods involving spatial co-location pattern mining can reveal distribution
Jinghan Wang, Guangyue Li, Tinghua Ai
doaj   +1 more source

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