Results 61 to 70 of about 58,877 (128)

RESEARCH ON ROLLING BEARING FAULT FEATURE EXTRACTION METHOD WITH SGMD-MOMEDA (MT)

Jixie qiangdu, 2022
Aiming at the problem that the vibration signal of rolling bearing is difficult to extract due to the characteristics of non-linear, non-stationary and low signal-to-noise ratio, a new fault extraction method based on symplectic geometry mode ...
CAO YaLei, DU YingJun, WEI Guang, DONG XinMin, GAO LiPeng, LIU YuXi   +5 more
doaj  

Explicit constructions of short virtual resolutions of truncations

Bulletin of the London Mathematical Society, EarlyView.
Abstract We propose a concept of truncation for arbitrary smooth projective toric varieties and construct explicit cellular resolutions for nef truncations of their total coordinate rings. We show that these resolutions agree with the short resolutions of Hanlon, Hicks, and Lazarev, which were motivated by symplectic geometry, and we use our definition
Lauren Cranton Heller
wiley   +1 more source

Geometrical origin of the *-product in the Fedosov formalism

, 2004
The construction of the *-product proposed by Fedosov is implemented in terms of the theory of fibre bundles. The geometrical origin of the Weyl algebra and the Weyl bundle is shown.
Abraham, Agarwal, Agarwal, Amiet, Arnal, Arnold, Arratia, Arratia, Arratia, Arratia, Arratia, Ballesteros, Bayen, Bayen, Bertelson, Bordemann, Bordemann, Cannas de Silva, Cariñena, Cariñena, Carruther, Chari, Chern, Cohen, Connes, Curtis, Dirac, Dito, Dito, Estrada, Fedosov, Fedosov, Fedosov, Figueroa, Fronsdal, Gadella, Gadella, Gadella, Gadella, Gadella, García-Compeán, Gerstenhaber, Gerstenhaber, González, Gracia-Bondía, Gracia-Bondía, Gracia-Bondía, Gracia-Bondía, Gracia-Bondía, Gracia-Bondía, Groenewold, Guillemin, Gutt, Gutt, Gutt, Hillery, J. Tosiek, Krűger, Landsman, Libermann, Lichnerowicz, M. Gadella, M.A. del Olmo, Martín, Moyal, Nakahara, Nieto, Omori, Omori, Plebański, Plebański, Przanowski, Steenrod, Tatarskij, Tosiek, Underhill, Vaisman, van Hove, Varilly, Varilly, Ward, Watson, Weyl, Wigner, Wolf, Woodhouse   +85 more
core   +1 more source

Kinematic space and the orbit method

Journal of High Energy Physics, 2019
Kinematic space has been defined as the space of codimension-2 spacelike extremal surfaces in anti de Sitter (AdS d+1) spacetime which, by the Ryu-Takayanagi proposal, compute the entanglement entropy of spheres in the boundary CFT d .
Robert F. Penna, Claire Zukowski
doaj   +1 more source

The contact cut graph and a Weinstein L$\mathcal {L}$‐invariant

Transactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.
Abstract We define and study the contact cut graph which is an analogue of Hatcher and Thurston's cut graph for contact geometry, inspired by contact Heegaard splittings (Giroux, Proceedings of the International Congress of Mathematicians, Beijing, 2002; Torisu, Internat. Math. Res. Notices (2000), 441–454).
Nickolas A. Castro, Gabriel Islambouli, Jie Min, Sümeyra Sakallı, Laura Starkston, Angela Wu   +5 more
wiley   +1 more source

Instantaneous Normal Modes of Yukawa Liquids

Contributions to Plasma Physics, Volume 65, Issue 8-9, October 2025.
ABSTRACT The instantaneous normal mode (INM) approach, which extends the normal mode description of collective excitations in solids to liquids, is applied to strongly coupled, three‐dimensional Yukawa liquids. Based on data from Langevin dynamics simulations, we compute the instantaneous normal modes across a wide range of coupling and screening ...
Tillman Keller, Hanno Kählert
wiley   +1 more source

Dynamic Continuous Variable Quantum Key Distribution for Securing a Future Global Quantum Network

Advanced Quantum Technologies, Volume 8, Issue 10, October 2025.
The article explores securing a dynamic global quantum network using continuous variable QKD, proposing a unified three‐layer network architecture for integrating existing QKD networks. It evaluates secret key rates across various channels and introduces the link capacity as a metric for determining the optimum path for secret key distribution in a ...
Mikhael T. Sayat, Sebastian P. Kish, Ping Koy Lam, Nicholas J. Rattenbury, John E. Cater   +4 more
wiley   +1 more source

Some New Constructions of Authentication Codes with Arbitration and Multi-Receiver from Singular Symplectic Geometry

Journal of Applied Mathematics, 2011
A new construction of authentication codes with arbitration and multireceiver from singular symplectic geometry over finite fields is given. The parameters are computed.
You Gao, Huafeng Yu
doaj   +1 more source

Combined Full Wave and Test Particle Simulations of the Io Footprint in the Jovian Aurora

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract It is known that the perturbation of the co‐rotating plasma of Jupiter by Io propagates as Alfvén waves along the magnetic field lines. These waves accelerate electrons, which leads to precipitation and the formation of an auroral footprint on the ionosphere.
W. W. Eshetu, R. L. Lysak, A. H. Sulaiman, S. S. Elliott   +3 more
wiley   +1 more source

No-go theorems for r-matrices in symplectic geometry

Communications in Analysis and Mechanics
If a triangular Lie algebra acts on a smooth manifold, it induces a Poisson bracket on it. In case this Poisson structure is actually symplectic, we show that this already implies the existence of a flat connection on any vector bundle over the manifold ...
Jonas Schnitzer
doaj   +1 more source