Results 21 to 30 of about 7,440 (255)

Multi-criteria comparison of 220 kV switchgears which have different circuits of electrical connections [PDF]

E3S Web of Conferences, 2023
The paper compares different open 220 kV switchgears in the context of a new complex solution offered by the author. The solution is a polyhedron circuit topology switchgear with novel scheme and arrangement approaches.
Grinev Nikolai
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The impact of polyhedron learning assisted by Edpuzzle in improving students' mathematical representation

Jurnal Elemen, 2023
The ability that students must have is the ability of mathematical representation. This research aims to determine if eighth-grade students at Al-Qona'ah Islamic Junior High School improve their mathematical representation skills after using the Edpuzzle 
Nenden Suciyati Sartika, Yaya S. Kusumah, Bambang Avip Priatna Martadiputra, Sutihat Sutihat, Eka Rosdianwinata   +4 more
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Combinatorial Lemmas for Polyhedrons

Discussiones Mathematicae Graph Theory, 2005
Summary: We formulate general boundary conditions for a labelling to assure the existence of a balanced \(n\)-simplex in a triangulated polyhedron. Furthermore we prove a Knaster-Kuratowski-Mazurkiewicz type theorem for polyhedrons and generalize some theorems of Ichushi and Idzik.
Adam Idzik, Konstanty Junosza-Szaniawski
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The Polyhedron-Hitting Problem [PDF]

Proceedings of the Twenty-Sixth Annual ACM-SIAM Symposium on Discrete Algorithms, 2014
We consider polyhedral versions of Kannan and Lipton's Orbit Problem (STOC '80 and JACM '86)---determining whether a target polyhedron V may be reached from a starting point x under repeated applications of a linear transformation A in an ambient vector space Q^m.
Ventsislav Chonev, Joël Ouaknine, James Worrell 0001   +2 more
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Structure of the {U13} polyoxo cluster U13O8Clx(MeO)38–x (x = 2.3, MeO = methoxide)

Acta Crystallographica Section E: Crystallographic Communications, 2021
The structure of a new type of polyoxo cluster complex that contains thirteen uranium atoms, {U13}, is reported. The complex crystallized from methanol containing tetravalent uranium (UIV) with a basic organic ligand, and was characterized as ...
Sebastian Fichter, Thomas Radoske, Atsushi Ikeda-Ohno   +2 more
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Glycol-assisted Cu-doped ZnS polyhedron-like structure as binder-free novel electrode materials

Journal of Saudi Chemical Society, 2022
The facile, efficient, and straightforward preparation of electrode material for energy storage devices has drawn considerable interest for practical applications.
Iftikhar Hussain, Muhammad Ahmad, Xi Chen, Nadir Abbas, Saleh Al Arni, Alsamani A.M. Salih, Mhamed Benaissa, Muhammad Ashraf, Muhammad Ayaz, Muhammad Imran, Mohd Zahid Ansari, Kaili Zhang   +11 more
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A polyhedron made of tRNAs [PDF]

Nature Chemistry, 2010
Supramolecular assembly is a powerful strategy used by nature to build nanoscale architectures with predefined sizes and shapes. With synthetic systems, however, numerous challenges remain to be solved before precise control over the synthesis, folding and assembly of rationally designed three-dimensional nano-objects made of RNA can be achieved. Here,
Severcan, Isil, Geary, Cody, Chworos, Arkadiusz, Voss, Neil, Jacovetty, Erica, Jaeger, Luc   +5 more
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New algorithm for calculating cycle intersection indices

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. The objects of study are triangulated compact polyhedron P , which are n -dimensional manifolds with boundary. The goal is to create new efficient algorithms for calculating modulo 2 intersection indices. Materials and methods.
E.I. Yakovlev
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Casting a polyhedron with directional uncertainty [PDF]

Computational Geometry, 2002
Directional uncertainty considered in motion planning and robotics is analyzed for the following case: given a three-dimensional polyhedral object it is search a polyhedral cast such that its two parts can be removed in opposite directions with a specific uncertainty without damage to the object or the cast parts.
Hee-Kap Ahn, Otfried Cheong, René van Oostrum   +2 more
openaire   +5 more sources

Study on the Contact Parameter Calibration of the Maize Kernel Polyhedral Discrete Element Model

Agriculture
During maize production and transportation, maize kernels frequently interact with mechanical components. To accurately simulate the interaction process between maize and mechanical components, it is essential to establish a reliable maize kernel model ...
Huhu Chen, Haipeng Lin, Xuefeng Song, Fengwei Zhang, Fei Dai, Ting Yang, Baicheng Li   +6 more
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