Results 41 to 50 of about 22,383 (289)

Hydrodynamic simulation of hypervelocity generation by multidimensional graded impactors: Planarity enhancement study

open access: yesHeliyon, 2023
Hypervelocity impact in the universe can be generated by a three-stage gas gun. Achieving the desirable planarity of the flyer enlarges the experimentally effective area of the flyer under the hypervelocity condition.
Chengcheng Guo   +7 more
doaj   +1 more source

Planar antennas [PDF]

open access: yesIEEE Microwave Magazine, 2006
The development of the broadband antenna for ultrawideband (UWB) applications such as communications, imaging, radar, and localization is discussed. UWB systems are based on transmitting and receiving impulses with extremely wide spectra. As the antennas for UWB should have broad operating bandwidths for impedance matching and high-gain radiation in ...
Cheng, Zhi Ning   +5 more
openaire   +3 more sources

Planar arcs [PDF]

open access: yesJournal of Combinatorial Theory, Series A, 2018
The error in the differentiation argument has been ...
Simeon Ball, Michel Lavrauw
openaire   +7 more sources

Simultaneous FPQ-ordering and hybrid planarity testing

open access: yes, 2021
We introduce and study a constrained planarity testing problem, called 1-FIXED CONSTRAINED PLANARITY, and prove that this problem can be solved in quadratic time for biconnected graphs.
Rutter I., Liotta G., Tappini A.
core   +1 more source

Beyond level planarity

open access: yes, 2016
In this paper we settle the computational complexity of two open problems related to the extension of the notion of level planarity to surfaces different from the plane. Namely, we show that the problems of testing the existence of a level embedding of a
Frati, F.   +20 more
core   +2 more sources

The expected sum of edge lengths in planar linearizations of trees

open access: yesJournal of Language Modelling
Dependency trees have proven to be a very successful model to represent the syntactic structure of sentences of human languages. In these structures, vertices are words and edges connect syntacticallydependent words.
Lluís Alemany-Puig   +1 more
doaj   +1 more source

Planar lattices and planar graphs

open access: yesJournal of Combinatorial Theory, Series B, 1976
AbstractIt is shown that a finite lattice is planar if and only if the (undirected) graph obtained from its (Hasse) diagram by adding an edge between its least and greatest elements is a planar graph.
openaire   +2 more sources

Gap-planar graphs

open access: yesTheoretical Computer Science, 2018
We introduce the family of $k$-gap-planar graphs for $k \geq 0$, i.e., graphs that have a drawing in which each crossing is assigned to one of the two involved edges and each edge is assigned at most $k$ of its crossings. This definition is motivated by applications in edge casing, as a $k$-gap-planar graph can be drawn crossing-free after introducing ...
Sang Won Bae 0001   +10 more
openaire   +5 more sources

Line graph embedding of co-intersection graph of ideals of commutative rings

open access: yesAKCE International Journal of Graphs and Combinatorics
This research paper focuses on the co-intersection graph of a commutative ring [Formula: see text]. The co-intersection graph of [Formula: see text] denoted by [Formula: see text] is a simple graph with vertices that are non-trivial ideals of [Formula ...
Ali Al Khabyah   +4 more
doaj   +1 more source

Noise modeling and depth calibration for Time-Of-Flight cameras

open access: yesELCVIA Electronic Letters on Computer Vision and Image Analysis, 2014
thesis extended ...
Amira Belhedi
doaj   +1 more source

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