Results 111 to 120 of about 4,323 (217)

A New Approach for Solving Nonlinear Differential Equations with Poincare Map and Poincare Section

Majlesi Journal of Electrical Engineering
Solving many of the scientific problems in physics and engineering leads to differential equations, which in many cases no analytical answers can be found.
Ghasem Sadeghi Bajestani, Ali Sheikhani, Seyed Mohammad Reza Hashemi Golpayegani, Farah Ashrafzadeh, Paria Hebrani   +4 more
doaj  

APPLICATION OF STROBOSCOPIC POINCARE MAP FOR ROTOR SYSTEM INTERFACE NODE DEFECTS DIAGNOSIS

Advanced Engineering Research, 2011
The application of stroboscopic Poincare map for the recovery of normal path of dynamic system motion in case of peak additive disturbance and in absence of a priori data on frequency of restorable signal is considered.
Mikhail V. Chuveyko
doaj  

Free semigroups of large critical exponent

Journal of Topology, Volume 19, Issue 3, September 2026.
Abstract For a convergence group equipped with an expanding coarse‐cocycle, we construct finitely generated free subsemigroups, which we call Bishop−−Jonessemigroups$\textit{Bishop--Jones semigroups}$, of critical exponent arbitrarily close to but strictly less than the critical exponent of the ambient group.
Aleksander Skenderi
wiley   +1 more source

The phase portrait of the Hamiltonian system associated to a Pinchuk map

Anais da Academia Brasileira de Ciências
In this paper we describe the global phase portrait of the Hamiltonian system associated to a Pinchuk map in the Poincaré disc. In particular, we prove that this phase portrait has 15 separatrices, five of them singular points, and 7 canonical regions ...
JOAN CARLES ARTÉS, FRANCISCO BRAUN, JAUME LLIBRE   +2 more
doaj   +1 more source

Tunable Unidirectional Guided Resonances via Multi‐Singularity Interactions in Momentum Space

Nanophotonics, Volume 15, Issue 15, 13 August 2026.
C points can intrinsically coexist around symmetry‐protected BICs without symmetry reduction. Symmetry breaking splits SP‐BICs into new C points that interact with intrinsic ones, forming perfect UGRs at distinct k points with tunable topological charges.
Ying Yu, Siyi Han, Zhiyuan Gu, Dan Wang, Yu Li, Qiao Jiang   +5 more
wiley   +1 more source

Spin Injection Of Exciton–Polaritons With Halide Perovskites At Room Temperature

Advanced Functional Materials, Volume 36, Issue 67, 20 August 2026.
A monolithic Tamm‐plasmon microcavity embedding a two‐dimensional halide perovskite enables room‐temperature spin injection of exciton‐polaritons under quasi‐resonant optical excitation. Polarization‐resolved spectroscopy reveals partial preservation of the injected spin in the lower polariton branch, while bare excitons remain fully depolarized.
Elena Sendarrubias Arias‐Camisón, Maksim Lednev, Jorge Cuadra, Raúl Gago, Luis Viña, Francisco José García Vidal, Johannes Feist, Ferry Prins, Carlos Antón Solanas   +8 more
wiley   +1 more source

Existence of Poincaré maps in piecewise linear differential systems in R^n [PDF]

[eng] In this paper we present a relationship between the algebraic notion of proper system, the geometric notion of contact point and the dynamic notion of Poincaré map for piecewise linear differential systems.
Teruel, Antonio E., Llibre, Jaume
core   +1 more source

Gate‐Tunable Floquet Weyl Photon Emission from Topological Dirac Semimetal Cd3As2

Advanced Materials, Volume 38, Issue 47, 21 August 2026.
We report experimental demonstration of Floquet band engineering in a 3D Dirac semimetal. Circularly polarized light breaks the time reversal symmetry and transforms Cd3As2 into a Floquet–Weyl phase, splitting Dirac nodes into chirality‐opposite Weyl nodes with nonzero Berry curvature.
Sobhan Subhra Mishra, Thomas CaiWei Tan, Manoj Gupta, Faxian Xiu, Ranjan Singh   +4 more
wiley   +1 more source

Full‐Stokes Polarimetry Metasurface‐Enabled Single‐Shot Measurement of the Spin Hall Effect of Light

Advanced Optical Materials, Volume 14, Issue 30, 14 August 2026.
This study presents a metasurface‐enabled approach to measure the spin Hall effect of light in a single‐shot. The metasurface splits a reflected light into six polarization‐dependent focal spots, allowing all Stokes parameters to be obtained from single image.
Jeonghoon Choi, Jaekyung Kim, Sujeong Park, Doyoon Lee, Juhoon Baek, Junsuk Rho, Minkyung Kim   +6 more
wiley   +1 more source

Poincaré duality angles on Riemannian manifolds with boundary [PDF]

, 2009
On a compact Riemannian manifold with boundary, the absolute and relative cohomology groups appear as certain subspaces of harmonic forms. DeTurck and Gluck showed that these concrete realizations of the cohomology groups decompose into orthogonal ...
Shonkwiler, Clayton
core