Results 51 to 60 of about 5,511 (164)

Impact Features Extracting Method for a Reciprocating Compressor Based on the ABC-SGMD Model

Applied Sciences
In the typical vibration signal of a reciprocating air compressor, multi-source nonlinear characteristics are exhibited and are often drowned out in background noise, which leads to a lack of robustness in traditional feature analysis methods and ...
Jiaxun Li, Fengfeng Bie, Qianqian Li, Zhaolong Zhou, Xinting Miao, Siyi Zhang   +5 more
doaj   +1 more source

Quantum optics in the phase space - A tutorial on Gaussian states

, 2011
In this tutorial, we introduce the basic concepts and mathematical tools needed for phase-space description of a very common class of states, whose phase properties are described by Gaussian Wigner functions: the Gaussian states.
A. Botero, A. Brodutch, A. Datta, A. Furusawa, A. Peres, A. Serafini, A. Serafini, A. Serafini, A. Uhlmann, B.L. Hu, B.L. Schumaker, B.P. Lanyon, C.H. Bennett, C.T. Lee, D. Buono, D. Slepian, E.P. Wigner, F. Intravaia, G. Adam, G. Adesso, G. Giedke, G. Giedke, G. Giedke, G. Vidal, G.M. D’Ariano, H. Ollivier, H. Scutaru, H. Scutaru, H.P. Yuen, J. Eisert, J. Williamson, K. Cahill, L. Henderson, L.M. Kuang, Lu-Ming Duan, M. Horodecki, M. Piani, M. Takeoka, M.A. Marchiolli, M.G. Genoni, M.G.A. Paris, M.G.A. Paris, M.G.A. Paris, M.J. Woolley, M.M. Cola, M.M. Cola, M.M. Wolf, M.S. Kim, N. Lütkenhaus, N. Piovella, N.J. Cerf, P. Giorda, P. Horodecki, P. Marian, R. Simon, R. Simon, R. Simon, R. Simon, R. Vasile, R.F. Werner, R.J. Glauber, R.J. Glauber, R.L. Hudson, S. Maniscalco, S. Olivares, S. Olivares, S. Pirandola, S. Popescu, S.-H. Xiang, S.L. Braunstein, S.L. Braunstein, S.S. Mizrahi, V. D’Auria   +72 more
core   +1 more source

Taking limits in topological recursion

Journal of the London Mathematical Society, Volume 112, Issue 3, September 2025.
Abstract When does topological recursion applied to a family of spectral curves commute with taking limits? This problem is subtle, especially when the ramification structure of the spectral curve changes at the limit point. We provide sufficient (straightforward‐to‐use) conditions for checking when the commutation with limits holds, thereby closing a ...
Gaëtan Borot, Vincent Bouchard, Nitin Kumar Chidambaram, Reinier Kramer, Sergey Shadrin   +4 more
wiley   +1 more source

Parity of ranks of Jacobians of curves

Proceedings of the London Mathematical Society, Volume 131, Issue 3, September 2025.
Abstract We investigate Selmer groups of Jacobians of curves that admit an action of a non‐trivial group of automorphisms, and give applications to the study of the parity of Selmer ranks. Under the Shafarevich–Tate conjecture, we give an expression for the parity of the Mordell–Weil rank of an arbitrary Jacobian in terms of purely local invariants ...
Vladimir Dokchitser, Holly Green, Alexandros Konstantinou, Adam Morgan   +3 more
wiley   +1 more source

Complex Numbers, Quantum Mechanics and the Beginning of Time

, 1993
A basic problem in quantizing a field in curved space is the decomposition of the classical modes in positive and negative frequency. The decomposition is equivalent to a choice of a complex structure in the space of classical solutions.
Ashtekar, Ashtekar, D'Eath, Dawydov, De Angelis, Fröhlich, G.W. Gibbons, Gibbons, Gibbons, Gibbons, Gibbons, Glimm, H.-J. Pohle, Hu, Ince, Nicolai, Osterwalder, Osterwalder, Page, Tagirov, Uhlmann, Uhlmann   +21 more
core   +1 more source

A topological algorithm for the Fourier transform of Stokes data at infinity

Journal of the London Mathematical Society, Volume 112, Issue 2, August 2025.
Abstract We give a topological description of the behaviour of Stokes matrices under the Fourier transform from infinity to infinity in a large number of cases of one level. This explicit, algorithmic statement is obtained by building on a recent result of T.
Jean Douçot, Andreas Hohl
wiley   +1 more source

Modeling General Asymptotic Calabi–Yau Periods

Fortschritte der Physik, Volume 73, Issue 7, July 2025.
Abstract In the quest to uncovering the fundamental structures that underlie some of the asymptotic Swampland conjectures the authors initiate the general study of asymptotic period vectors of Calabi–Yau manifolds. The strategy is to exploit the constraints imposed by completeness, symmetry, and positivity, which are formalized in asymptotic Hodge ...
Brice Bastian, Thomas W. Grimm, Damian van de Heisteeg   +2 more
wiley   +1 more source

The birational geometry of GIT quotients

Bulletin of the London Mathematical Society, Volume 57, Issue 7, Page 1952-1967, July 2025.
Abstract Geometric invariant theory (GIT) produces quotients of algebraic varieties by reductive groups. If the variety is projective, this quotient depends on a choice of polarisation; by work of Dolgachev–Hu and Thaddeus, it is known that two quotients of the same variety using different polarisations are related by birational transformations.
Ruadhaí Dervan, Rémi Reboulet
wiley   +1 more source

Continuity of HYM connections with respect to metric variations

Journal of the London Mathematical Society, Volume 112, Issue 1, July 2025.
Abstract We investigate the set of (real Dolbeault classes of) balanced metrics Θ$\Theta$ on a balanced manifold X$X$ with respect to which a torsion‐free coherent sheaf E$\mathcal {E}$ on X$X$ is slope stable. We prove that the set of all such [Θ]∈Hn−1,n−1(X,R)$[\Theta] \in H^{n - 1,n - 1}(X,\mathbb {R})$ is an open convex cone locally defined by a ...
Rémi Delloque
wiley   +1 more source

The $c$-map, Tits Satake subalgebras and the search for $\mathcal{N}=2$ inflaton potentials

, 2014
In this paper we address the general problem of including inflationary models exhibiting Starobinsky-like potentials into (symmetric) $\mathcal{N}=2$ supergravities.
Fré, P., Sorin, A. S., Trigiante, M.
core   +1 more source