Showing papers in "Physics Letters A in 2005"

TL;DR: In this Letter, a new image encryption scheme is presented, in which shuffling the positions and changing the grey values of image pixels are combined to confuse the relationship between the cipher-image and the plain-image.

TL;DR: In this article, the authors investigated the global asymptotic stability analysis problem for a class of neural networks with discrete and distributed time-delays and derived sufficient conditions for the neural networks to be globally stable in terms of a linear matrix inequality.

TL;DR: In this paper, an extended F-expansion method for finding periodic wave solutions of nonlinear evolution equations in mathematical physics is presented. But the method is not suitable for the generalized Zakharov equations.

TL;DR: In this article, a new method is presented to search exact solutions of nonlinear differential equations, which is used to look for exact solution of the Fisher equation, and exact solitary waves of Fisher equation are given.

TL;DR: In this article, a systematic design procedure to anti-synchronize Chua's chaotic system based on back-stepping procedure is presented, which needs only a single controller to realize anti-sync.

TL;DR: In this article, the authors measured the Raman spectra of anatase TiO2 nanocrystals with 2.2-25.5 nm grain sizes at temperature range 83-293 K.

TL;DR: In this article, the authors considered the description of the fractal media that uses the fractional integrals and proved that the integrals can be used to describe the media with non-integer mass dimensions.

TL;DR: In this article, the von Neumann entropy of the reduced density matrix ρ A in the ground state of a two-dimensional spin system with a torus topology and non-trivial four-body interactions between its spins is studied.

TL;DR: In this paper, the stability properties of Hopfield neural networks with discrete and continuously distributed delay were investigated using the method of variation parameter, inequality technique and stochastic analysis, the sufficient conditions to guarantee the mean square exponential stability of an equilibrium solution were given.

TL;DR: In this article, the authors used the asymmptotic iteration method to find the coefficients in the perturbation series for the eigenvalues and eigenfunctions directly, without first solving the unperturbed problem.

TL;DR: In this article, a large-scale smoothed-out model of the universe ignores small-scale inhomogeneities, but the averaged effects of those inhomogenities may alter both observational and dynamical relations at the larger scale.

TL;DR: In this article, the s(s˜)-wave Dirac equation is solved exactly for a single particle with spin and pseudospin symmetry moving in a central Woods-Saxon potential, and the corresponding radial wavefunctions for the two-component spinor are obtained in terms of the hypergeometric function.

TL;DR: In this paper, the authors presented a quantum secret sharing and secret splitting protocol with single photons running forth and back between the participating parties, which has a high intrinsic efficiency, namely all photons except those chosen for eavesdropping check could be used for sharing secret.

TL;DR: It is shown how this generalization that unifies Renyi and Tsallis entropy in a coherent picture naturally comes into being if the q-formalism of generalized logarithm and exponential functions is used, and how together with Sharma–Mittal's measure another possible extension emerges which however does not obey a pseudo-additive law and lacks of other properties relevant for a generalized thermostatistics.

TL;DR: A variant version of this protocol based on the variant two-step protocol can considerably reduce the realization difficulty in experiment and the use and identification of Bell states are enough in the two protocols disregarding completely the sharer number, hence, the protocols are more feasible in technique.

TL;DR: A successful chosen-plain-text cryptanalytic attack, which is composed of two mutually independent procedures: the cryptanalysis of the diffusion process and the crypt analysis of the spatial permutation process.

TL;DR: In this paper, a spherical Kadomtsev-Petviashvili equation is derived with symbolic computation for the dust ion-acoustic waves with zenith-angle perturbation.

TL;DR: In this article, the perturbed nonlinear Schrodinger model with variable coefficients is used to obtain exact analytic bright-solitonic solutions with or without the chirp.

TL;DR: In this article, sufficient conditions for the existence, uniqueness and global asymptotic and exponential stability of the equilibrium point for Cohen-Grossberg neural networks with time delays were presented.

TL;DR: In this paper, a double-elastic beam model was developed for transverse vibrations of double-walled carbon nanotubes under compressive axial load, which includes the interaction of van der Waals force between the inner and outer tubes and the effect of compressive AXial load.

TL;DR: In this article, two sufficient conditions for the existence and uniqueness of the equilibrium point and global exponential stability of BAM neural networks with distributed delays and reaction diffusion terms are obtained by using the theory of topological degree, properties of M-matrix, Lyapunov functional, and analysis technique.

TL;DR: In this paper, an extended Fan's sub-equation method is used for constructing exact travelling wave solutions of nonlinear partial differential equations (NLPDEs), where the key idea of this method is to take full advantage of the general elliptic equation involving five parameters, which has more new solutions and whose degeneracies can lead to special subequations involving three parameters.

TL;DR: The arguments that are often put forward to justify the singular importance given to completely positive maps over more generic maps in describing open quantum evolution are studied in this paper, and they find that these do not appear convincing on closer examination.

TL;DR: In this article, a simple but effective iteration method is proposed to search for limit cycles or bifurcation curves of delay-differential equations, and an example is given to illustrate its convenience and effectiveness.

TL;DR: In this article, a class of switched Hopfield neural networks with time-varying delay is investigated, and the parametric uncertainty is considered and assumed to be norm bounded.

TL;DR: Based on Lyapunov stability theory and Routh-Hurwitz criteria, the nonlinear controller and some generic sufficient conditions for global asymptotic synchronization are attained in this article.

TL;DR: In this paper, a detailed study on the dielectric properties was done presuming that the magnetoelectric interactions between constituent ferrite and ferroelectric phases may result in various anomalies in the die-lectric behaviour of these composites.

TL;DR: In this paper, the stability of the equilibrium point of the impulsive Hopfield-type neural networks with time delays was investigated using Lyapunov functions and analysis technique, and it was shown that impulses do contribute to system's stability behavior.

TL;DR: In this paper, a family of exact analytic, solitonic solutions for the Korteweg-de Vries equation is presented, of which the previous solutions in plasma physics turn out to be the special cases.

TL;DR: In this paper, the robust stability analysis for interval neural networks with multiple time-varying delays and parameter uncertainties is studied, and a sufficient condition is obtained by means of Lyapunov functionals, which guarantees the existence, uniqueness and global asymptotic stability of the delayed neural network.