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  • noun

Words related to tetrahedron

any polyhedron having four plane faces

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The results suggest the presence of two basic structural units, namely, the Ge[Se.sub.4] tetrahedral units with fourfold coordinated Ge atom and Ge[Se.sub.3] pyramids with threefold coordinated Sb atom.
Chavare (7) Sivanageswara (8) Wedge 44% 61.26% 40% Triangular 42% 12.61% 32% Oval -- 3.60% 8% Tetrahedral 14% 21.62% 20% Irregular -- 0.90% -- Shapes Chaudhari (9) Sangeeta (10) Present Study Wedge 33.87% 34% 38.88% Triangular 19.35% 34% 22.22% Oval 8.06% 9.4% 20.37% Tetrahedral 32.25% 15% 11.11% Irregular -- 7.40% Table 2 Study by NSB NIB NBB NN Das1 (1) 98% 2% -- Nayak1 (2) 50% -- -- 50% P.
The system energy [E.sub.s] of H located in the three octahedral sites and the tetrahedral site was calculated (Table 1).
These results indicate that Ros87 coordinates the Co(II) with a tetrahedral geometry.
[20], and Barbic [21] gave an exact corotational FEM stiffness matrix for a linear tetrahedral element by adding the higher-order terms of element rotation.
Each layer is composed of tetrahedral silicate sheets surrounding octahedral aluminum sheets.
Cytokinesis in microsporocyte meiosis is of simultaneous type, and the micropore tetrads are tetrahedral. Mature pollen grains are two-celled with three germ pores.
The spinel structure in which the sites occupied by the cations are of two types, tetrahedral and octahedral sites.
After a review of numerical methods, she covers scanning techniques and image processing, fundamentals of geometric modeling and meshing, image-based triangular and tetrahedral meshing, image-base quadrilateral and hexahedral meshing, volumetric T-spline modeling, and finite element and isogeometric analysis applications.
Support for shell element (2D) and tetrahedral and hexahedral meshing (3D) is now completed with support of discrete mass and rotary inertia (0D), as well as beam elements (1D).
Crushed under high pressure, carbon's atomic bonds buckle, popping atoms into the 3-D tetrahedral arrangement of diamonds.