918 research outputs found
Suppression of the critical collapse for one-dimensional solitons by saturable quintic nonlinear lattices
The stabilization of one-dimensional solitons by a nonlinear lattice against
the critical collapse in the focusing quintic medium is a challenging issue. We
demonstrate that this purpose can be achieved by combining a
nonlinearlatticeandsaturationofthequinticnonlinearity.
Thesystemsupportsthreespeciesofsolitons, namely, fundamental (even-parity) ones
and dipole (odd-parity) modes of on- and off-site-centered types. Very narrow
fundamental solitons are found in an approximate analytical form, and
systematic results for very broad unstable and moderately broad partly stable
solitons, including their existence and stability areas, are produced by means
of numerical methods. Stability regions of the solitons are identified by means
of systematic simulations. The stability of all the soliton species obeys the
Vakhitov-Kolokolov criterion.Comment: 8 pages,8 figures, Chaos (2018), to be publishe
The application of change management as a consultant in a Chinese enterprise during 2016-2017
In moderm society, the user’s expectation on the quality of the environment are becoming
imperative. Especially for shopping malls, restaurants, office buildings, hotels, airports, railway
stations and other public places, in the core areas of the city, the service quality has become a key
element of people’s first impression. Because of that all of environmental service enterprises came
into being to promote the development of the tertiary industry an important part of social economy.
With new age of the golobalization bettwen strategic implementation and management challenges,
how to improve the market competitiveness will be the hardest challenge to all of the enterprises.
Face up to this challenge, to build human resources management system with high-qualified
performance has become common concern to the company's leaders. However there are some
arguments between human resource management and firm performance. Becasue do not have
many research analysis samples on china small medium enteprise between human resource
management and enterprise performance deeply. Therefore, this case study takes the small medium
enterprises as a research project, analyzes the human resource management and the enterprise
performance correlation deeply and detailly
Strong Asymptotic Properties of Kernel Smooth Density and Hazard Function Estimation for Right Censoring NA Random Variable
Most studies for NA random variable is under complete sampling setting, which
is actually an relatively ideal condition in application. The paper relaxes
this condition to the censoring incomplete sampling data and considers the
topic for kernel estimation of the density function together with the hazard
function based on the Kaplan-Meier estimator. The strong asymptotic properties
for the two estimators are firstly established
Efficient excitation and tuning of toroidal dipoles within individual homogenous nanoparticles
We revisit the fundamental topic of light scattering by single homogenous
nanoparticles from the new perspective of excitation and manipulation of
toroidal dipoles. It is revealed that besides within all-dielectric particles,
toroidal dipoles can also be efficiently excited within homogenous metallic
nanoparticles. Moreover, we show that those toroidal dipoles excited can be
spectrally tuned through adjusting the radial anisotropy parameters of the
materials, which paves the way for further more flexible manipulations of the
toroidal responses within photonic systems. The study into toroidal multipole
excitation and tuning within nanoparticles deepens our understanding of the
seminal problem of light scattering, and may incubate many scattering related
fundamental researches and applications.Comment: Four Figures,Ten Pages and Comments Welcome
Elusive pure anapole excitation in homogenous spherical nanoparticles with radial anisotropy
For homogenous isotropic dielectric nanospheres with incident plane waves,
Cartesian electric and toroidal dipoles can be tunned to cancel each other in
terms of far-field scattering, leading to the effective anopole excitation. At
the same time however, other multipoles such as magnetic dipoles with
comparable scattered power are simultanesouly excited, mixing with the anopole
and leading to a non-negligible total scattering cross section. Here we show
that for homogenous dielectric nanospheres, radial anisotropy can be employed
to significantly suppress the other multipole excitation, which at the same
time does not compromise the property of complete scattering cancallation
between Cartesian electric and toroidal dipoles. This enables an elusive pure
anopole excitation within radially anisotropic dielectric nanospheres, which
may shed new light to many scattering related fundamental researches and
applications.Comment: Invited submission with four figures and ten pages. Comments welcome
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