Results 21 to 30 of about 4,935 (245)
A symbolic-numeric approach for parametrizing ruled surfaces [PDF]
, 2020 This paper presents symbolic algorithms to determine whether a given surface (implicitly or parametrically defined) is a rational ruled surface and find a proper parametrization of the ruled surface.
Pérez Díaz, Sonia, Shen, Li-Yong
core +1 more source
Classification of weak del Pezzo pairs for surfaces
Mathematics OpenA weak del Pezzo surface is a smooth projective surface whose anticanonical divisor [Formula: see text] is nef and big. We generalize this concept to weak del Pezzo pairs for surfaces and classify those with minimal and non-minimal properties.
Masayoshi Miyanishi
doaj +1 more source
Frontiers in Mechanical EngineeringThe five axis linkage Computer Numerical Control machine tool for integral impeller can achieve blade machining through side milling, which is of great significance for improving the machining accuracy, production efficiency, and long-term stability of ...
Yu Zhao
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Advanced Engineering Materials, EarlyView.Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink +4 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Multiscale experiments and modeling reveal how Ti3C2Tx MXene nanosheets reinforce PVDF nanocomposites. An optimal MXene loading (∼1 wt.%) nearly doubles tensile strength through efficient stress transfer, flake alignment, and crack‐deflection mechanisms, transforming ductile polymer behavior into a controlled multi‐stage fracture pathway which aligns ...
Bita Soltan Mohammadlou +5 more
wiley +1 more source
Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes
Advanced Functional Materials, EarlyView.Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita +6 more
wiley +1 more source
Moduli spaces of vector bundles on a singular rational ruled surface
, 2016 We study moduli spaces M-X (r, c(1), c(2)) parametrizing slope semistable vector bundles of rank r and fixed Chern classes c(1), c(2) on a ruled surface whose base is a rational nodal curve.
Bhosle, Usha N. +2 more
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Advanced Functional Materials, EarlyView.Solution‐processed Cu(bdc) forms prototypical MOF thin films for which a multitude of not fully satisfactory structural models have been suggested. Combining rotating grazing‐incidence diffraction and X‐ray reflectivity on two complementary samples with density‐functional theory, we first discard the previously suggested models and then identify a non ...
Narges Taghizade +7 more
wiley +1 more source
On the Singularities of Surfaces Ruled by Conics [PDF]
, 2014 We classify the singularities of a surface ruled by conics: they are rational double points of type A n or D n . This is proved by showing that they arise from a precise series of blow-ups of a suitable surface geometrically ruled by conics. We determine
BRUNDU, MICHELA, SACCHIERO, GIANNI
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Rational ruled surfaces as symplectic hyperplane sections
Transactions of the American Mathematical Society, 2023 We study embeddability of rational ruled surfaces as symplectic hyperplane sections into closed integral symplectic manifolds. From this we obtain results on Stein fillability of Boothby–Wang bundles over rational ruled surfaces.
Kwon, Myeonggi, Oba, Takahiro
openaire +3 more sources