28,654 research outputs found
Robust synchronization for 2-D discrete-time coupled dynamical networks
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2012 IEEEIn this paper, a new synchronization problem is addressed for an array of 2-D coupled dynamical networks. The class of systems under investigation is described by the 2-D nonlinear state space model which is oriented from the well-known Fornasini–Marchesini second model. For such a new 2-D complex network model, both the network dynamics and the couplings evolve in two independent directions. A new synchronization concept is put forward to account for the phenomenon that the propagations of all 2-D dynamical networks are synchronized in two directions with influence from the coupling strength. The purpose of the problem addressed is to first derive sufficient conditions ensuring the global synchronization and then extend the obtained results to more general cases where the system matrices contain either the norm-bounded or the polytopic parameter uncertainties. An energy-like quadratic function is developed, together with the intensive use of the Kronecker product, to establish the easy-to-verify conditions under which the addressed 2-D complex network model achieves global synchronization. Finally, a numerical example is given to illustrate the theoretical results and the effectiveness of the proposed synchronization scheme.This work was supported in part by the National Natural Science Foundation of China under Grants 61028008 and 61174136, the International Science and Technology Cooperation Project of China under
Grant No. 2009DFA32050, the Natural Science Foundation of Jiangsu Province of China under Grant BK2011598, the Qing Lan Project of Jiangsu Province of China, the Project sponsored by SRF for ROCS of SEM of China, the Engineering and Physical Sciences Research Council (EPSRC) of the U.K. under Grant GR/S27658/01, the Royal Society of the U.K., and the Alexander von Humboldt Foundation of Germany
Antimagnetic Rotation Band in Nuclei: A Microscopic Description
Covariant density functional theory and the tilted axis cranking method are
used to investigate antimagnetic rotation (AMR) in nuclei for the first time in
a fully self-consistent and microscopic way. The experimental spectrum as well
as the B(E2) values of the recently observed AMR band in 105Cd are reproduced
very well. This gives a further strong hint that AMR is realized in specific
bands in nuclei.Comment: 10 pages, 4 figure
Local covariant density functional constrained by the relativistic Hartree-Fock theory
The recent progress in the localized covariant density functional constrained
by the relativistic Hartree-Fock theory is briefly presented by taking the
Gamow-Teller resonance in 90Zr as an example. It is shown that the constraints
introduced by the Fock terms into the particle-hole residual interactions are
straight forward and robust.Comment: 4 pages, 1 figure, Proceedings of NSD12, Opatija, Croatia, 9-13 July
201
Validating foundry technologies for extended mission profiles
This paper presents a process qualification and characterization strategy that can extend the foundry process reliability potential to meet specific automotive mission profile requirements. In this case study, data and analyses are provided that lead to sufficient confidence for pushing the allowed mission profile envelope of a process towards more aggressive (automotive) applications.\ud
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Nuclear charge-exchange excitations in localized covariant density functional theory
The recent progress in the studies of nuclear charge-exchange excitations
with localized covariant density functional theory is briefly presented, by
taking the fine structure of spin-dipole excitations in 16O as an example. It
is shown that the constraints introduced by the Fock terms of the relativistic
Hartree-Fock scheme into the particle-hole residual interactions are
straightforward and robust.Comment: 4 pages, 1 figure, Proceedings of INPC2013, Florence, Italy, 2-7 June
201
Echo Emission From Dust Scattering and X-Ray Afterglows of Gamma-Ray Bursts
We investigate the effect of X-ray echo emission in gamma-ray bursts (GRBs).
We find that the echo emission can provide an alternative way of understanding
X-ray shallow decays and jet breaks. In particular, a shallow decay followed by
a "normal" decay and a further rapid decay of X-ray afterglows can be together
explained as being due to the echo from prompt X-ray emission scattered by dust
grains in a massive wind bubble around a GRB progenitor. We also introduce an
extra temporal break in the X-ray echo emission. By fitting the afterglow light
curves, we can measure the locations of the massive wind bubbles, which will
bring us closer to finding the mass loss rate, wind velocity, and the age of
the progenitors prior to the GRB explosions.Comment: 25 pages, 3 figures, 2 tables. Accepted for publication in Ap
Single transverse-spin asymmetry for -meson production in semi-inclusive deep inelastic scattering
We study the single-transverse spin asymmetry for open charm production in
the semi-inclusive lepton-hadron deep inelastic scattering. We calculate the
asymmetry in terms of the QCD collinear factorization approach for mesons
at high enough , and find that the asymmetry is proportional to the
twist-three tri-gluon correlation function in the proton. With a simple model
for the tri-gluon correlation function, we estimate the asymmetry for both
COMPASS and eRHIC kinematics, and discuss the possibilities of extracting the
tri-gluon correlation function in these experiments.Comment: 13 pages, 7 figure
Covariant density functional theory for antimagnetic rotation
Following the previous letter on the first microscopic description of the
antimagnetic rotation (AMR) in 105Cd, a systematic investigation and detailed
analysis for the AMR band in the frame-work of tilted axis cranking (TAC) model
based on covariant density functional theory are carried out. After performing
the microscopic and self-consistentTAC calculations with an given density
functional, the configuration for the observed AMR band in 105Cd is obtained
from the single-particle Routhians. With the configuration thus obtained, the
tilt angle for a given rotational frequency is determined self-consistently by
minimizing the total Routhian with respect to the tilt angle. In such a way,
the energy spectrum, total angular momenta, kinetic and dynamic moments of
inertia, and the B(E2) values for the AMR band in 105Cd are calculated. Good
agreement with the data is found. By investigating microscopically the
contributions from neutrons and protons to the total angular momentum, the
"two-shears-like" mechanism in the AMR band is clearly illus-trated. Finally,
the currents leading to time-odd mean fields in the Dirac equation are
presented and discussed in detail. It is found that they are essentially
determined by the valence particles and/or holes. Their spatial distribution
and size depend onthe specific single-particle orbitals and the rotational
frequency.Comment: 35 pages, 17 figures, accepted by Phys. Rev.
Mass Accommodation at a High-Velocity Water Liquid-Vapor Interface
We Use Molecular Dynamics to Determine the Mass Accommodation Coefficient (MAC) of Water Vapor Molecules Colliding with a Rapidly Moving Liquid-Vapor Interface. This Interface Mimics Those Present in Collapsing Vapor Bubbles that Are Characterized by Large Interfacial Velocities. We Find that at Room Temperature, the MAC is Generally Close to Unity, and Even with Interfaces Moving at 10 Km/s Velocity, It Has a Large Value of 0.79. using a Simplified Atomistic Fluid Model, We Explore the Consequences of Vapor Molecule Interfacial Collision Rules on Pressure, Temperature, and Density of a Vapor Subjected to an Incoming High-Velocity Liquid-Vapor Interface
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