Results 1 to 10 of about 241,773 (303)
Orbital Hypernormal Forms [PDF]
Symmetry, 2021 In this paper, we analyze the problem of determining orbital hypernormal forms—that is, the simplest analytical expression that can be obtained for a given autonomous system around an isolated equilibrium point through time-reparametrizations and transformations in the state variables.
Antonio Algaba +2 more
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Journal of Manufacturing and Materials Processing, 2022 Pin extrusion is a common process to realise pin structures in different geometrical dimensions for a subsequent joining operation. Nevertheless, the process of pin extrusion offers process limits regarding sheet thinning as a consequence of the punch ...
David Römisch +4 more
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Metals, 2021 This work aimed to study the deformation characteristics and microstructure of AA6063 aluminum alloy component with complex shape manufactured by cold orbital forming processing.
Wei Feng +3 more
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Exact Analytical Form of Diatomic Molecular Orbitals
ACS Omega, 2022 We provide the exact analytical form of diatomic molecular orbitals, as given by the solutions of a single-electron diatomic molecule with arbitrary nuclear charges, using our recently developed method for solving Schrödinger equations. We claim that the best representation of the wave function is a factorized form including a power prefactor, an ...
Yunzhi Li, Chen Li
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Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses
Ultrafast Science, 2023 A universal mechanism of ultrafast 2-electron orbital swap is discovered through 2-photon sequential double ionization of Li. After a 1s electron in Li is ionized by absorbing an extreme ultraviolet photon, the other 2 bound electrons located on 2 ...
Hui Jiang +4 more
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Material Flow in Ultrasonic Orbital Microforming
Metals, 2019 Ultrasonic orbital microforming—UOM—uses the broadly understood idea of orbital forging but uses very different laws of physics. The only shaping force in this process is the inertia force resulting from the acceleration in the rotary motion ...
Wojciech Presz
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Basic Forms and Orbit Spaces: a Diffeological Approach [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2016 If a Lie group acts on a manifold freely and properly, pulling back by the quotient map gives an isomorphism between the differential forms on the quotient manifold and the basic differential forms upstairs. We show that this result remains true for actions that are not necessarily free nor proper, as long as the identity component acts properly, where
Karshon, Yael, Watts, Jordan
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Ultrasonic Orbital Microforming—A New Possibility in the Forming of Microparts
Metals, 2018 The demand for very small metal parts is growing rapidly due to the development of micromechanisms. In microtechnology, the dimensions of scale parts are below 1 + c mm, where c varies based on the process type.
Wojciech Presz
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Dual XH–π Interaction of Hexafluoroisopropanol with Arenes
Molecules, 2021 The dual XH (OH and CH) hydrogen-bond-donating property of 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) and the strong dual XH–π interaction with arenes were firstly disclosed by theoretical studies. Here, the high accuracy post-Hartree–Fock methods, CCSD(T)/
Le Lu, Ruimao Hua
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Simulating binary neutron stars: dynamics and gravitational waves [PDF]
, 2008 We model two mergers of orbiting binary neutron stars, the first forming a black hole and the second a differentially rotating neutron star. We extract gravitational waveforms in the wave zone. Comparisons to a post-Newtonian analysis allow us to compute
B. Gustaffson +12 more
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