Results 81 to 90 of about 76,092 (311)

SPATIAL MODELING OF SOLID-STATE REGULAR POLYHEDRA (SOLIDS OF PLATON) IN AUTOCAD SYSTEM

open access: yesNauka ta progres transportu, 2009
This article describes the technology of modeling regular polyhedra by graphic methods. The authors came to the conclusion that in order to create solid models of regular polyhedra the method of extrusion is best to use.
P. V. Bezditko   +3 more
doaj  

On the properties of the concave antiprisms of second sort [PDF]

open access: yesFME Transactions, 2013
The paper examines geometrical, static and dynamic properties of the polyhedral structures obtained by folding and creasing the two-rowed segment of equilateral triangular net.
Obradović Marija   +2 more
doaj  

Characterizations of adjacency on the branching polyhedron

open access: yesDiscrete Mathematics, 1979
AbstractGiven two distinct branchings of a directed graph G, we present several conditions which are equivalent to the corresponding incidence vectors of the branchings being adjacent on the branching polyhedron of G. The proof of these equivalences uses a “shrinking algorithm” which will determine in O(n2) time and space whether or not the incidence ...
Dirk Hausmann, Rick Giles
openaire   +3 more sources

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

open access: yesAdvanced Materials, EarlyView.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman   +3 more
wiley   +1 more source

Poly[bis(μ-2-amino-4-nitrobenzoato)di-μ-aqua-dirubidium]

open access: yesActa Crystallographica Section E, 2014
In the structure of the title salt, [Rb2(C7H5N2O4)2(H2O)2]n, the asymmetric unit comprises two independent and different seven-coordinate Rb+ cations, one forming an RbO7 polyhedron, the other a RbO6N polyhedron, each of which is considerably distorted ...
Graham Smith
doaj   +1 more source

Supramolecular Chemistry in Metal–Organic Framework Materials

open access: yesAdvanced Materials, EarlyView.
This review highlights synergies between reticular chemistry and supramolecular chemistry. The role of supramolecular interactions in determining framework…guest interactions and attempts to understand dynamic behavior in metal–organic frameworks (MOFs), particularly emphasizing the development of crystal sponges, studying reactions in frameworks and ...
Eugenia Miguel‐Casañ   +3 more
wiley   +1 more source

Robust Method for Position Measurement of Vertex of Polyhedron Using Shape from Focus

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2010
A robust measurement method for measuring the vertex position of a small polyhedron using 3D image processing is proposed. The shape from focus method is applied for obtaining 3D positions of surfaces of the polyhedron.
Takashi HARADA
doaj   +1 more source

On the Łojasiewicz exponent and Newton polyhedron [PDF]

open access: yesKodai Mathematical Journal, 2005
Let \(f:(\mathbb{C}^{n},0)\rightarrow (\mathbb{C},0)\mathbb{\;}\)be a germ of a holomorphic function having an isolated critical point at the origin. The Łojasiewicz exponent of \(f\) at \(0\) is \[ L(f)=\inf \{\lambda >0:| \text{grad} f (x)| \geq C\left| x\right| ^{\lambda }\text{ near zero}\}. \] It is an important invariant of the singularity \(f=0.\
openaire   +4 more sources

State‐of‐the‐Art, Insights, and Perspectives for MOFs‐Nanocomposites and MOF‐Derived (Nano)Materials

open access: yesAdvanced Materials, EarlyView.
Different approaches to MOF‐NP composite formation, such as ship‐in‐a‐bottle, bottle‐around‐the‐ship and in situ one‐step synthesis, are used. Owing to synergistic effects, the advantageous features of the components of the composites are beneficially combined, and their individual drawbacks are mitigated.
Stefanos Mourdikoudis   +6 more
wiley   +1 more source

Vizualizing of semi-regular polyhedrons in AutoCAD environment

open access: yesStructural Mechanics of Engineering Constructions and Buildings, 2019
The paper examines the automated formation by the kinematic method of the surfaces of Archimedes' semi-regular polyhedra of three forms: truncated tetrahedron, truncated octahedron and truncated icosahedron.
Viktoryna A. Romanova
doaj   +1 more source

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