Results 41 to 50 of about 2,544,042 (295)

Hamiltonian Formulation of Two Body Problem in Wheeler-Feynman electrodynamics [PDF]

open access: yes, 1994
A Hamiltonian formulation for the classical problem of electromagnetic interaction of two charged relativistic particles is found.Comment: 22 pages, 8 Uuencoded Postscript ...
A. D. Fokker   +7 more
core   +3 more sources

Optimal H2 Moment Matching-Based Model Reduction for Linear Systems through (Non)convex Optimization

open access: yesMathematics, 2022
In this paper, we compute a (local) optimal reduced order model that matches a prescribed set of moments of a stable linear time-invariant system of high dimension. We fix the interpolation points and parametrize the models achieving moment-matching in a
Ion Necoara, Tudor-Corneliu Ionescu
doaj   +1 more source

SINUSOIDAL SIGNAL PARAMETERS IDENTIFICATION WITH UNKNOWN VARIABLE AMPLITUDE [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2018
The paper considers the problem of the frequency identification for a biased sinusoidal signal in the absence of measurement noise. It is assumed that the displacement and amplitude of the sinusoidal signal are unknown functions of time.
Le Van Tuan, Bobtsov A. A.
doaj   +1 more source

The Thouless theorem for matrix product states and subsequent post-density matrix renormalization group methods [PDF]

open access: yes, 2013
The similarities between Hartree-Fock (HF) theory and the density-matrix renormalization group (DMRG) are explored. Both methods can be formulated as the variational optimization of a wave-function ansatz.
Chan, Garnet Kin-Lic   +3 more
core   +4 more sources

Third post-Newtonian accurate generalized quasi-Keplerian parametrization for compact binaries in eccentric orbits

open access: yes, 2004
We present Keplerian-type parametrization for the solution of third post-Newtonian (3PN) accurate equations of motion for two non-spinning compact objects moving in an eccentric orbit.
B. F. Schutz   +10 more
core   +1 more source

Individual dipole toroidal states: Main features and search in the ( e,e′ ) reaction [PDF]

open access: yesPhysical Review C, 2019
Individual low-energy E1 toroidal and compressional states (TS and CS) produced by the convective nuclear current ${\bf j}_{\rm c}$ were recently predicted for $^{24}$Mg in the framework of quasiparticle random-phase-approximation (QRPA) with Skyrme ...
V. Nesterenko   +3 more
semanticscholar   +1 more source

Bounds on heavy Majorana neutrinos in type-I seesaw and implications for collider searches

open access: yesPhysics Letters B, 2017
The neutrino masses and flavor mixings, which are missing in the Standard Model (SM), can be naturally incorporated in the type-I seesaw extension of the SM with heavy Majorana neutrinos being singlet under the SM gauge group.
Arindam Das, Nobuchika Okada
doaj   +1 more source

Probing Dark Energy Dynamics from Current and Future Cosmological Observations [PDF]

open access: yes, 2010
We report the constraints on the dark energy equation-of-state w(z) using the latest 'Constitution' SNe sample combined with the WMAP5 and SDSS data. Based on the localized principal component analysis and the model selection criteria, we find that the ...
A. Shafieloo   +4 more
core   +3 more sources

Optimizing Variational Quantum Algorithms Using Pontryagin’s Minimum Principle

open access: yesPhysical Review X, 2017
We use Pontryagin’s minimum principle to optimize variational quantum algorithms. We show that for a fixed computation time, the optimal evolution has a bang-bang (square pulse) form, both for closed and open quantum systems with Markovian decoherence ...
Zhi-Cheng Yang   +4 more
doaj   +1 more source

Robust and efficient factorial designs under baseline parametrization

open access: yesCommunications in Statistics - Theory and Methods
. Factorial designs, traditionally based on orthogonal parametrization, are widely used to study the effects of factors on responses. While the baseline parametrization has more applicability in many cases compared to the orthogonal parametrization ...
Yu Liu, Min Ren, Shengli Zhao
semanticscholar   +1 more source

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