Relevant bibliographies by topics / Prismatic polyhedron

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Prismatic polyhedron'

Author: Grafiati
Published: 7 July 2024
Last updated: 31 July 2025

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Journal articles on the topic "Prismatic polyhedron"

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Miyazaki, Yuzuru, Naoki Igawa та Kunio Yubuta. "Incommensurately modulated crystal structure of α′ (O′3)-type sodium cobalt oxide Na x CoO2 (x ∼ 0.78)". Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, № 3 (2021): 371–77. http://dx.doi.org/10.1107/s205252062100370x.

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A single-phase sample of α′ (O′3)-type layered sodium cobalt oxide Na x CoO2 (x ∼ 0.78) was prepared and its incommensurately modulated crystal structure was analyzed using the (3+1)-dimensional superspace approach to the powder neutron diffraction data. The crystal structure of the cobaltate is accurately described based on the superspace group C2/m(α0γ)00, wherein the positions of Na atoms are most significantly modulated in the monoclinic a direction to form an ordered arrangement. Such a displacive modulation causes a quasi-periodic shift of Na atoms from the centers of the NaO6 polyhedra
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Stetskiv, Andrij, Beata Rozdzynska-Kielbik, Renata Misztal, and Volodymyr Pavlyuk. "Grown from lithium flux, the ErCo5Si3.17silicide is a combination of disordered derivatives of the UCo5Si3and Yb6Co30P19structure types." Acta Crystallographica Section C Structural Chemistry 71, no. 6 (2015): 506–10. http://dx.doi.org/10.1107/s2053229615009791.

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A ternary hexaerbium triacontacobalt enneakaidecasilicide, ErCo5Si3.17, crystallizes as a combination of disordered variants of the hexagonal UCo5Si3(P63/m) and Yb6Co30P19(P-6) structure types and is closely related to the Sc6Co30Si19and Ce6Rh30Si19types. The Er, Co and three of the Si atoms occupy sites ofm.. symmetry and a fourth Si atom occupies a site of -6.. symmetry. The environment of the Er atom is a 21-vertex pseudo-Frank–Kasper polyhedron. Trigonal prismatic coordination is observed for the Si atoms. The Co atoms are enclosed in heavily deformed cuboctahedra and 11-vertex polyhedra.
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Stetskiv, Andrij, Renata Misztal, and Volodymyr Pavlyuk. "Crystal and electronic structures of La2LiGe6−x(x= 0.21) and La2LiGe4Si2." Acta Crystallographica Section C Crystal Structure Communications 68, no. 8 (2012): i60—i64. http://dx.doi.org/10.1107/s0108270112031526.

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The synthesis and characterization of a new ternary dilanthanum lithium hexagermanide, La2LiGe6−x(x= 0.21), belonging to the Pr2LiGe6structure type, and a quaternary dilanthanum lithium tetragermanium disilicide, La2LiGe4Si2, which crystallizes as an ordered variant of this type, are reported. In both structures, Li is on a site ofmmmsymmetry. All other atoms are on sites ofm2msymmetry. These structures are new representatives of a homologous linear structure series based on structural fragments of the AlB2, CaF2and ZrSi2structure types. The observed 17-vertex polyhedra are typical for La atom
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Vovk, O. P., I. M. Naumko, and H. O. Zankovych. "Pseudosymmetry of Quartz Crystals and Its Mineralogical and Genetical Significance." Mineralogical Journal 47, no. 1 (2025): 33–44. https://doi.org/10.15407/mineraljournal.47.01.033.

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The pseudosymmetry of quartz crystals is described based on the example of "Marmarosh diamonds" a newly identified genetic type of quartz — skeletal crystals with hydrocarbon inclusions. All theoretically possible morphological types of pseudosymmetry in quartz crystals are discussed: L33L2, L33L23PC, L66L27PC, L3, L2PC, C, L33P, L22P, L2, L66P, 3L23PC, L22P, P, — . The most common types include L66L27PC, L33L23PC, 3L23PC, and P. Distinct symmetry elements, which manifest depending on formation conditions, include the L3 axis, L2 axes, pseudo-L6 axes, pseudo-L2 axes, and pseudo-planes. Quartz
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Xu, Jianjun, He Xu, Dongming Yan, Kai Chen, and Degao Zou. "A Novel Calculation Method of Hydrodynamic Pressure Based on Polyhedron SBFEM and Its Application in Nonlinear Cross-Scale CFRD-Reservoir Systems." Water 14, no. 6 (2022): 867. http://dx.doi.org/10.3390/w14060867.

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Hydrodynamic pressure is an important factor that cannot be ignored in the seismic safety evaluation of dams. However, when the polyhedron-scaled boundary finite element method is used to simulate dams in a cross-scale dynamic analysis, polygonal surfaces often appear on the upstream face of dams, which is difficult to deal with for conventional methods of hydrodynamic pressure. In this paper, a three-dimensional calculation method of hydrodynamic pressure based on the polyhedron-scaled boundary finite element method is proposed, in which polygon (triangle, quadrilateral, pentagon, hexagon, he
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Amarante, Eduardo Menezes de Souza, and Edson Emanoel Starteri Sampaio. "Analysis of magnetic field components anomalies due to homogeneous polyhedrons." Brazilian Journal of Geophysics 39, no. 1 (2021): 85. http://dx.doi.org/10.22564/rbgf.v38i3.2078.

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ABSTRACT. A procedure for determining semi-analytical expressions for the magnetic fields caused by homogeneous polyhedral bodies based on Green's theorem has been developed. It constitutes a modification of previous developments for the gravity field of three-dimensional bodies and employs the discretization of the faces of the polyhedron by triangles and the definition of local coordinates for each triangle. A maximum misfit of less than 1.0% between the values computed with these analytical expressions and those obtained with closed expressions for prismatic bodies, applied to a homogeneous
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Hossain, G. M. Golzar, та A. J. Amoroso. "Bis[4-amino-N-(4-methylpyrimidin-2-yl-κN3)benzenesulfonamidato-κN](2,2′-bipyridine-κ2N,N′)mercury(II)". Acta Crystallographica Section E Structure Reports Online 70, № 4 (2014): m127—m128. http://dx.doi.org/10.1107/s1600536814004760.

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The complete molecule of the title complex, [Hg(C11H11N4O2S)2(C10H8N2)], is generated by crystallographic twofold symmetry, with the mercury cation lying on the rotation axis. The mercury coordination polyhedron can be described as tetrahedral (from theN,N′-bidenate bipyridine molecule and the sulfonamide N atoms of the sulfamerazine anions) or as squashed trigonal-prismatic, if two long (> 2.80 Å) Hg—N bonds to pyrimidine N atoms are included. The dihedral angle between the aromatic rings in the anion is 73.3 (2)°. In the crystal, N—H...(N,O) and N—H...N hydrogen bonds link the molecules i
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Prytula-Kurkunova, Angelina Yu, Victor A. Trush, Viktoriya V. Dyakonenko, Tetyana Yu Sliva та Vladimir M. Amirkhanov. "Tris(N-{bis[methyl(phenyl)amino]phosphoryl}benzenesulfonamidato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)lanthanum(III)". Acta Crystallographica Section E Crystallographic Communications 73, № 7 (2017): 1076–81. http://dx.doi.org/10.1107/s2056989017008970.

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The asymmetric unit of [La(C20H21N3O3PS)3(C12H8N2)] is created by one LaIIIion, three deprotonatedN-{bis[methyl(phenyl)amino]phosphoryl}benzenesulfonamidate (L−) ligands and one 1,10-phenanthroline (Phen) molecule. Each LaIIIion is eight-coordinated (6O+2N) by three phosphoryl O atoms, three sulfonyl O atoms of threeL−ligands and two N atoms of the chelating Phen ligand, leading to the formation of six- and five-membered metallacycles, respectively. The lanthanum coordination polyhedron has a bicapped trigonal–prismatic geometry. `Sandwich-like' intramolecular π–π stacking interactions are obs
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Shah, Jay A., Samuel R. Miller, Shaphan R. Jernigan, and Gregory D. Buckner. "A Permanent Magnet Synchronous Spherical Motor for High-Mobility Servo-Actuation." Machines 10, no. 8 (2022): 612. http://dx.doi.org/10.3390/machines10080612.

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The development of direct-drive spherical motors offers a potential solution to the limitations of conventional multiple degree-of-freedom (DOF) actuators, which typically utilize single-DOF joints (rotational and/or prismatic), arranged in series or parallel and powered by multiple single-DOF actuators. These configurations can be accompanied by kinematic singularities, backlash, limited power density and efficiency, and computationally expensive inverse kinematics. This paper details the design, fabrication and experimental testing of permanent magnet synchronous spherical motors (PMSSM) for
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Gourdon, O., V. Petricek, and M. Evain. "A new structure type in the hexagonal perovskite family; structure determination of the modulated misfit compound Sr9/8TiS3." Acta Crystallographica Section B Structural Science 56, no. 3 (2000): 409–18. http://dx.doi.org/10.1107/s0108768100002160.

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Sr9/8TiS3, strontium titanium sulfide, a new phase in the hexagonal perovskite-like Sr x TiS3 system, has been prepared and its structure solved from single-crystal X-ray data within the (3 + 1)-dimensional [(3 + 1)D] formalism. Sr9/8TiS3 crystallizes with trigonal symmetry [R3¯m(00γ)0s superspace group], with the following lattice parameters: a s = 11.482 (3), c s = 2.9843 (8) Å, q = 0.56247 (7)c* and V s = 340.7 (3) Å3. The structure was considered as commensurate [R3¯c three-dimensional (3D) space group], but refined within the (3 + 1)D formalism to a residual factor R = 2.79% for 64 parame
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Dissertations / Theses on the topic "Prismatic polyhedron"

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García, Gómez Sonia C. "Allocation et optimisation de tolérances géométriques par des polyédres prismatiques." Electronic Thesis or Diss., Bordeaux, 2023. http://www.theses.fr/2023BORD0504.

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Les écarts géométriques et dimensionnels des pièces mécaniques peuvent causer des perturbations nuisibles aux fonctionnalités attendues des systèmes mécaniques. Les spécifications géométriques et dimensionnelles représentent les limites des défauts de fabrication des surfaces fabriquées. La détermination des tolérances n’est pas une tâche aisée car (i) les valeurs des tolérances assignées affectent les fonctionnalités attendues d’un système et le coût de fabrication de ses pièces, et (ii) l'interdépendance des tolérances et des jeux rend complexe leur agrégation dans une résultante.L’analyse d
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Book chapters on the topic "Prismatic polyhedron"

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Menon, Sandeep, and Thomas Gessner. "A Method for Adaptive Anisotropic Refinement and Coarsening of Prismatic Polyhedra." In Lecture Notes in Computational Science and Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-40594-5_10.

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Conference papers on the topic "Prismatic polyhedron"

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Salpeter, Nathaniel O., and Yassin A. Hassan. "Numerical Simulation Using Realizable k-e Turbulence Model of Jet Flow Mixing Within Rod Bundles." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48854.

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In this investigation, a steady state simulation of jet mixing in a rod bundle with varied jet Reynolds numbers was performed with CD-Adapco’s Star-CCM+ computational fluid dynamics (CFD) code utilizing the realizable k-ε turbulence model and two-layer y+ wall treatment. The goal of the work is to investigate the ability of the realizable k-ε turbulence model to predict phenomena expected in the exit plenum of the prismatic gas cooled reactor as well as provide a benchmark for future numerical investigation into the validity of certain turbulence models for rod bundle simulation. Numerical res
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Genc, Suat, Robert W. Messler, Gary A. Gabriele, and Paul R. Bonenberger. "Numerating Possible Design Options for Integral Attachment." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dtm-1512.

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Abstract Proliferation of plastic in parts, and the ability to mold such parts of great complexity at little cost penalty, has resulted in growing use of integral attachments (or so called snap-fits) in designs. The diversity of integral attachment features and the potential applications of this assembly method have made it appear that design possibilities may be unbounded. This paper extends an “attachment level” methodology first articulated by researchers at General Motors by enumerating all possible design options for 2-D (rectilinear) and 3-D (prismatic) polyhedral as well as 2-D and 3-D
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Salpeter, Nathaniel O., and Yassin A. Hassan. "Numerical Simulations of Jet Flow Mixing Within Rod Bundles." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58321.

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The goal of the work is to investigate the abilities of the realizable k-ε and the k-ω turbulence models to predict phenomena expected in the lower plenum of the prismatic gas cooled reactor by benchmarking them against one another as well as verifying them against available experimental data [6]. Simulations were performed with CD-Adapco’s Star-CCM+ computational fluid dynamics (CFD) code utilizing the steady state approximation of the realizable k-ε turbulence model and the unsteady RANS approximations of the shear stress transport (SST) k-ω turbulence model. The unsteady results were averag
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Bhandari, Neelesh, and Murali Damodaran. "Computational Study of a Low Cost Rope Washer Pump for Brine Pumping Application in Rural Areas." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21152.

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The rope washer pump is a hydraulic device in which the rope consisting of equally spaced washers is pulled upward to displace the fluid volume to the desired head before delivering it at the outlet. The straightforward working principle, the ease of manufacture, and the low cost are the main advantages of this pump over a reciprocating pump. The rope washer pump can be either driven by electric motor, by a wind mill, or manually for pumping brine water for salt harvesting in rural areas. In this study computational fluid dynamics (CFD) modeling of the rope washer pump is used to estimate the
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