Results 31 to 40 of about 3,599 (302)

Dimension estimates of the attractor for the dissipative quantum Zakharov equations

Journal of Inequalities and Applications, 2019
The finite dimension estimates of Hausdorff dimension and fractal dimension of the attractor of the dissipative quantum Zakharov equations are mainly studied by using the estimates of the Lyapunov exponents. The main results on the attractor are obtained
Donglong Li, Yanfeng Guo
doaj   +1 more source

Dynamical Invariant and Exact Mechanical Analyses for the Caldirola–Kanai Model of Dissipative Three Coupled Oscillators

Entropy, 2021
We study the dynamical invariant for dissipative three coupled oscillators mainly from the quantum mechanical point of view. It is known that there are many advantages of the invariant quantity in elucidating mechanical properties of the system.
Salim Medjber, Salah Menouar, Jeong Ryeol Choi   +2 more
doaj   +1 more source

Trace formulae for dissipative and coupled scattering systems [PDF]

, 2007
For scattering systems consisting of a (family of) maximal dissipative extension(s) and a selfadjoint extension of a symmetric operator with finite deficiency indices, the spectral shift function is expressed in terms of an abstract Titchmarsh-Weyl ...
Behrndt, Jussi, Mark M. Malamud, Malamud, Mark M., Hagen Neidhardt, Malamud, Mark, Neidhardt, Hagen, Jussi Behrndt   +6 more
core   +1 more source

Dissipative contributions to spin polarization [PDF]

EPJ Web of Conferences
Utilizing the Zubarev non-equilibrium density operator method and a first-order gradient expansion, we provide a comprehensive classification of all possible spin polarization effects.
Buzzegoli Matteo
doaj   +1 more source

Recurrent Hypothermia and Autonomic Dysfunction Secondary to Shapiro Syndrome

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT A 44‐year‐old man presented with recurrent hypothermia, diaphoresis and hypertension. Extensive investigation for infectious, inflammatory, metabolic and endocrine aetiologies was negative. MR scan of the brain demonstrated no lesions but revealed callosal dysgenesis, consistent with Shapiro syndrome.
Naveen Kumar, Jeremy Johnson, Susanne Watkins, Eoin Mulroy   +3 more
wiley   +1 more source

Dissipative discrete Hamiltonian systems [PDF]

, 2005
A space of boundary values is constructed for minimal symmetric operator, generated by discrete Hamiltonian system, acting in the Hilbert space l2A (ℤ E ⊕ E) (ℤ={0, ±1, ±2, …}, dim E = n < ∞) with deficiency indices (n, n) (in limit-circle case at ±∞ and
Allahverdiev, B.P.
core   +1 more source

On Dissipation Operators of Quantum Optics

Russian Journal of Mathematical Physics
We consider dissipation operators used in Quantum Optics for the description of quantum spontaneous emission in the context of damped driven Jaynes-Cummings equations. The equations describe quantised one-mode Maxwell field coupled to a two-level molecule. Our main result is the symmetry and nonpositivity of basic dissipation operator of Quantum Optics.
Komech, A. I., Kopylova, E. A.
openaire   +2 more sources

Some Results about Dissipativity of Kolmogorov Operators [PDF]

Czechoslovak Mathematical Journal, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
G. Da Prato, Tubaro, Luciano
openaire   +3 more sources

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

International Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir, Sarah Mechhoud, Taous‐Meriem Laleg‐Kirati   +2 more
wiley   +1 more source

OPERATOR DISSIPATIVE PADA RUANG HILBERT [PDF]

, 2018
Dalam skripsi ini dibahas mengenai operator dissipative. Jika suatu operator merupakan infinitesimal generator dari suatu 0-semigrup (·) maka berlaku −(,)≤‖‖ dengan ∈ ().
Fauzan, Ahmad
core