Results 51 to 60 of about 174,485 (194)

On the Ramsey number of 4-cycle versus wheel

open access: yesIndonesian Journal of Combinatorics, 2016
For any fixed graphs $G$ and $H$, the Ramsey number $R(G,H)$ is the smallest positive integer $n$ such that for every graph $F$ on $n$ vertices must contain $G$ or the complement of $F$ contains $H$.
Enik Noviani, Edy Tri Baskoro
doaj  

Conjectures About Wheels Without One Edge with Paths and Cycles

open access: yesMathematics
The crossing number cr(G) of a graph G is the minimum number of edge crossings over all drawings of G in the plane. The main aim of this paper is to give the crossing numbers of the join products G*+Pn and G*+Cn for the connected graph G* obtained by ...
Michal Staš, Mária Timková
doaj   +1 more source

A note on the Ramsey numbers for theta graphs versus the wheel of order

open access: yesAKCE International Journal of Graphs and Combinatorics, 2018
The study of exact values and bounds on the Ramsey numbers of graphs forms an important family of problems in the extremal graph theory. For a set of graphs and a graph , the Ramsey number is the smallest positive integer such that for every graph on ...
Mohammed M.M. Jaradat   +3 more
doaj   +1 more source

Reproduction and validation of the dynamic rolling contact behavior of the bogie model in the curved section based on large-scale parallel finite element method

open access: yesNihon Kikai Gakkai ronbunshu, 2019
Dynamic contact behavior occurs between wheels and rails while the train is running, it is an unsteady phenomenon and becomes more complicated when passing through a curved section.
Hirotaka SAKAI   +3 more
doaj   +1 more source

Influence of the Load Distribution and Sizes on the Wheel Geometry in Passenger Cars [PDF]

open access: diamond, 2020
Jarosław Gonera   +2 more
openalex   +1 more source

Investigation into the mechanical properties and metal creaks of a diesel locomotive wheel

open access: yesTransport, 2010
After JSC ‘Lithuanian Railways’ (AB ‘Lietuvos geležinkeliai’) bought new Siemens ER20 CF locomotives produced in Western Europe and brought them into service, some of them have already done about 170–200 thousand km that caused the appearance of ...
V. Rudzinskas   +3 more
doaj  

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