Results 41 to 50 of about 4,087,447 (281)

دراسة تأثير دينامية الهواء على مقاطع مختلفة لفوهة محارق [PDF]

open access: yesEngineering and Technology Journal, 2008
Four type of burners of different rim shapes were made and tested.The rims were of plane surface, plane surface insulated from all side by nitrogen gas, out sidesharp edge and inside sharp edge.
doaj   +1 more source

Topological classification of the hyperspaces of polyhedral convex sets in normed spaces [PDF]

open access: yesМатематичні Студії, 2013
We prove that, for a normed space $X$ of dimension $dim(X)ge2$ the space $PConv_H(X)$ of non-empty polyhedral convexsubsets of $X$ endowed with the Hausdorff metric ishomeomorphic to the topological sum ${0}oplus |X^*|imes(IRoplus (IRimesarIR_+)oplus ...
I. V. Hetman
doaj  

Recursively-regular subdivisions and applications

open access: yesJournal of Computational Geometry, 2016
We generalize regular subdivisions (polyhedral complexes resulting from the projection of the lower faces of a polyhedron) introducing the class of recursively-regular subdivisions.
Rafel Jaume, Günter Rote
doaj   +1 more source

Polyhedral quotient spaces [PDF]

open access: yesColloquium Mathematicum, 1991
Let \(P\) be a polyhedron and \(E\) an equivalence relation on \(P\). This paper gives criteria for when \(P/E\) is a PL quotient space, i.e. when \(P/E\) admits a PL structure so that the quotient map \(q: P\to P/E\) is PL. Under the hypothesis that \(q\) is nondegenerate the author provides a criterion that is easily applicable and recovers some ...
openaire   +2 more sources

Boolean hypercubes and the structure of vector spaces

open access: yesJournal of Mathematical Sciences and Modelling, 2018
The present study pretends to describe an alternative way to look at Vector Spaces as a scaffold to produce a meaningful new theoretical structure to be used in both classical and quantum QSPR.
Ramon Carbó-dorca
doaj   +1 more source

Unit balls of Polyhedral Banach spaces with many extreme points

open access: yes, 2023
Let $E$ be a $(\mathrm{IV})$-polyhedral Banach space. We show that, for each $\epsilon>0$, $E$ admits an $\epsilon$-equivalent $\mathrm{(V)}$-polyhedral norm such that the corresponding closed unit ball is the closed convex hull of its extreme points ...
De Bernardi, Carlo Alberto
core  

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

open access: yesHigh Voltage, 2022
This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) on tuning the electrical performance of polypropylene (PP). OvPOSS with different content are introduced into PP using the solution method.
Xiaosi Lin   +4 more
doaj   +1 more source

Intersection Properties of Balls in Banach Spaces

open access: yesJournal of Function Spaces and Applications, 2013
We introduce a weaker notion of central subspace called almost central subspace, and we study Banach spaces that belong to the class (GC), introduced by Veselý (1997). In particular, we prove that if is an almost central subspace of a Banach space such
C. R. Jayanarayanan
doaj   +1 more source

Parallel tiled Nussinov RNA folding loop nest generated using both dependence graph transitive closure and loop skewing

open access: yesBMC Bioinformatics, 2017
Background RNA secondary structure prediction is a compute intensive task that lies at the core of several search algorithms in bioinformatics. Fortunately, the RNA folding approaches, such as the Nussinov base pair maximization, involve mathematical ...
Marek Palkowski, Wlodzimierz Bielecki
doaj   +1 more source

Cyclohexane plastic phase I: single-crystal diffraction images and new structural model

open access: yesIUCrData, 2023
The plastic phase of cyclohexane (polymorph I) was studied by Kahn and co-workers, without achieving a satisfactory determination of the atomic coordinates [Kahn et al. (1973). Acta Cryst. B29, 131–138].
Sylvain Bernès, Sebastian Camargo
doaj   +1 more source

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