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排序方式: 共有84条查询结果,搜索用时 14 毫秒
1.
Hassan A. Zedan M. Alghamdi Seham Sh. Tantawy 《Mathematical Methods in the Applied Sciences》2015,38(17):4357-4364
We study in this paper the Q‐symmetry and conditional Q‐symmetries of Drinfel'd–Sokolov–Wilson equations. The solutions which we obtain in this paper take the form of convergent power series with easily computable components. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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Lihua Chen Dept.of Math. Computer Science Fuqing Branch of Fujian Normal University Fuqing Fujian Jiaqi Mo Dept.of Math. Anhui Normal University Wuhu Anhui Faculty of Science Huzhou Teacher College Huzhou Zhejiang 《Annals of Differential Equations》2011,(4):434-439
An initial boundary value problem of semilinear nonlocal reaction diffusion equations is considered.Under some suitable conditions,using the asymptotic theory,the existence and asymptotic behavior of the interior layer solution to the initial boundary value problem are studied. 相似文献
4.
In this paper we propose numerical treatment for singular integral equations. The methods are developed by means of the Sinc approximation with smoothing transformations. Such approximation is an effective technique against the singularities of the equations, and achieves exponential convergence. Therefore the methods improve conventional results where only polynomial convergence have been reported. The resulting algebraic system is solved by least squares approximation and leap frog algorithm. Estimation of errors of the approximate solution is presented. Some experimental tests are presented to show the efficient of the proposed methods. 相似文献
5.
Bin Zhao 《高校应用数学学报(英文版)》2009,24(2):237-244
In this paper, the hereditarily almost expandability of inverse limits is investigated, with two results obtained. Let X be the inverse limit space of an inverse system (Xα, π^αβ, ∧}. (1) Suppose X is hereditarily κ-metacompact, if each Xα is hereditarily pointwise collectionwise normal (almost θ-expandable, almost discrete θ-expandable), then so is X; (2) Suppose X is hereditarily κ-σ-metacompact, if each Xα is hereditarily almost σ-expandable (almost discrete σ-expandable = σ-pointwise collectionwise normal), then so is X. 相似文献
6.
Nasser Metwally 《Physics letters. A》2011,375(48):4268-4273
A theoretical scheme is introduced to generate entangled network via Dzyaloshinskii-Moriya (DM) interaction. The dynamics of entanglement between different nodes, which is generated by direct or indirect interaction, is investigated. It is shown that, the direction of (DM) interaction and the locations of the nodes have a sensational effect on the degree of entanglement. The minimum entanglement generated between all the nodes is quantified. The upper and lower bounds of the entanglement depend on the direction of DM interaction, and the repetition of the behavior depends on the strength of DM. The generated entangled nodes are used as quantum channel to perform quantum teleportation, where it is shown that the fidelity of teleporting unknown information between the network members depends on the locations of the members. 相似文献
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K. I. Osman S. S. Hassan 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2006,38(3):537-544
The steady state bistable behaviour of a three-level Λ-shape is
examined in the presence of a control field
$({\rm \Omega} +\chi \left( t\right)
e^{i\varphi})$({\rm \Omega} +\chi \left( t\right)
e^{i\varphi})
: Ω is the strong Rabi component,
$\chi \left(
t\right) $\chi \left(
t\right)
is the stochastic part with relative phase ϕ; with
quantum interference between decay channels taken into account. One- and
two-way phase switching effect for the transmitted field against the phase
are predicted at fixed values for the incident input field. Also cooperative
switching effect shows multistable/bistable behaviour. Quantum interference
tends to diminish the dispersive effects responsible for multistable
behaviour (in the input-output relation and the cooperative switching
diagram) and asymmetry (in the phase switching diagram). Equivalence of the
role of the stochastic part of the control field with that of the
“classically” squeezed field is shown to occur only in the absence
of quantum interference. 相似文献
10.
研究了Hardy空间上Ces劋ro算子的有界性.证明极大Ces劋ro算子的强型和弱型有界估计.其弱有界性估计是精确的.推广和加强了已有研究结果. 相似文献