Results 11 to 20 of about 427,046 (249)
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015 We formulate a mathematical theory of auxetic behaviour based on one-parameter deformations of periodic frameworks. Our approach is purely geome- tric, relies on the evolution of the periodicity lattice and works in any dimension. We demonstrate its usefulness by predicting or recognizing, without experiment, computer simulations or numerical ...
Borcea, Ciprian, Streinu, Ileana
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Geometric Variational Inference [PDF]
Entropy, 2021 Efficiently accessing the information contained in non-linear and high dimensional probability distributions remains a core challenge in modern statistics. Traditionally, estimators that go beyond point estimates are either categorized as Variational Inference (VI) or Markov-Chain Monte-Carlo (MCMC) techniques.
Philipp Frank +2 more
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020 Mixing fluids often involves a periodic action, like stirring one’s tea. But reciprocating motions in fluids at low Reynolds number, in Stokes flows where inertia is negligible, lead to periodic cycles of mixing and unmixing, because the physics, molecular diffusion excepted, is time reversible. So how can fluid be mixed in such circumstances?
Jorge Arrieta +5 more
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RECOVERING OLD STEREOSCOPIC NEGATIVES AND PRODUCING DIGITAL 3D MODELS OF FORMER APPEARANCES OF HISTORIC BUILDINGS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Three-dimensional models with photographic textures have become a usual product for the study and dissemination of elements of heritage. The interest for cultural heritage also includes evolution along time; therefore, apart from the 3D models of the ...
Á. Rodríguez Miranda +1 more
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, 2019 We study the following separation problem: Given a collection of colored objects in the plane, compute a shortest "fence" $F$, i.e., a union of curves of minimum total length, that separates every two objects of different colors. Two objects are separated if $F$ contains a simple closed curve that has one object in the interior and the other in the ...
Giannopoulos, P. +3 more
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Ecologically relevant levels of multiple, common marine stressors suggest antagonistic effects
Scientific Reports, 2017 Stressors associated with global change will be experienced simultaneously and may act synergistically, so attempts to estimate the capacity of marine systems to cope with global change requires a multi-stressor approach. Because recent evidence suggests
Rolanda Lange, Dustin Marshall
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Medžiagotyra, 2023 This study explores the novel design of geometric rubbing profiles on rotary friction welding for enhanced mechanical clamping in joining dissimilar alloys such as copper and stainless steel 316L.
Martin Charles MARK +2 more
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Geometric dequantization [PDF]
Annals of Physics, 2005 Dequantization is a set of rules which turn quantum mechanics (QM) into classical mechanics (CM). It is not the WKB limit of QM. In this paper we show that, by extending time to a 3-dimensional "supertime", we can dequantize the system in the sense of turning the Feynman path integral version of QM into the functional counterpart of the Koopman-von ...
ABRIKOSOV JR A. A. +2 more
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Physics Letters B, 2017 We discuss black hole spacetimes with a geometrically defined quasi-local horizon on which the curvature tensor is algebraically special relative to the alignment classification. Based on many examples and analytical results, we conjecture that a spacetime horizon is always more algebraically special (in all of the orders of specialization) than other ...
Coley, Alan A. +2 more
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