【摘 要】
：
Periodicity,anti-periodicity and almost periodicity are significant dynamic behaviors of time-varying neural networks.This paper researches the dynamics of anti-periodic solution-s for a kind of inertial Quaternion-valued Hopfield neural networks with var
【机 构】
：
College of Science,Hebei North University,Hebei 075000,P.R.China;School of Mathematics,Hunan Univers
论文部分内容阅读
Periodicity,anti-periodicity and almost periodicity are significant dynamic behaviors of time-varying neural networks.This paper researches the dynamics of anti-periodic solution-s for a kind of inertial Quaternion-valued Hopfield neural networks with varying-time delays.Without resolving the explored neural networks into real-valued systems,in the light of a con-tinuation theorem of coincidence degree theory and inequality skills,by constructing different Lyapunov functions from those constructed in the existing research of the stability of equilibrium point,periodic solutions and anti-periodic solutions for neural networks,a newfangled sufficient condition insuring the existence of periodic solutions for above neural networks is gained.By constructing the same Lyapunov functions as those constructed in the proof of the existence of anti-periodic solutions,the newfangled asymptotic stability of anti-periodic solutions for above networks is acquired.
其他文献
马小虎平时不大爱学习,每次测试的成绩都不理想。这不,刚发下来的期末复习卷中有几道题目又出现了解题错误,咱们一起来帮帮他吧。[病例1]填空:x/5中(x是非零的自然数),当x()时,它是真分数;当x()时,它是假分数。[病症]x/5中(x是非0的自然数),当x(比5小而比3大)时,它是真分数;当x(比5大)时,它是假分数。
小熊嘟嘟很爱学习,这几天他正在复习学过的知识;嘟嘟也很粗心,这次作业中又出现了几个错误。嘟嘟错在哪儿了呢?我们一起来看看。[病例1]判断:圆锥的体积是圆柱体积的1/3。()[病症](√)。[诊断]嘟嘟忽视了“等底等高”这个前提条件。如右图所示,圆锥的体积是圆柱体积的1/3。
In this paper,we estimate the Fekete-Szeg? functional with k-th root transform for the inverse of certain classes of analytic univalent functions using quasi-subordination.
In this paper,we study the asymptotic behavior of solutions to the parabolic-elliptic chemotaxis system with singular sensitivity and logistic source{ut = △u-x▽·(u/v▽u)+ru-μuk,x ∈ Ω,t＞0,0 = △v-v+u,x ∈ Ω,t＞0 in a smooth bounded domain Ω C Rn(n＞2)with the n
In this paper,we prove the Mk-type sharp maximal function estimates for the Toeplitz type operators associated to the fractional integral and singular integral operator with non-smooth kernel.As an application,we obtain the boundedness of the operators on
In this paper,we first solve the Dirichlet problem for α-Hermite-Yang-Mills-Higgs equations on I±-Higgs bundles over a compact generalized K?hler manifold.Then we prove that the α-semi-stability on I±-Higgs bundles over closed generalized K?hler manifolds
回顾总结了7种Hansen系数及其导数的直接计算方法,比较分析了这些方法的计算效率和计算稳定性.研究表明:Hansen系数的递推关系可以用来判别计算结果的稳定性.最后指出,Wnuk方法(双精度计算)和McClain方法(4精度计算)是稳定的,可以用来计算人造卫星轨道摄动.由于大多数人造卫星采用小偏心率轨道,需要计算无奇点摄动,推荐使用McClain方法1(4精度计算).
In this paper,we characterize the reducing subspaces for Toeplitz operator T =Mzk+M*zl,where Mzk,Mzi are the multiplication operators on weighted Hardy space H2ω(D2),k =(k1,k2),l =(l1,l2),k ≠ l and ki,li are positive integers for i = 1,2.It is proved that
An additive mapping 8 from a *-algebra A into a left A-module M is called an additive Jordan left *-derivation if δ(A2)= Aδ(A)+A*δ(A)for every A in A.In this paper,we prove that every additive Jordan left *-derivation from a complex unital C*-algebra into
基于对9颗类太阳色球活动恒星高信噪比的高色散光谱观测,测量了这些恒星锂线(=6707.8A)的等值宽度,计算了这些恒星表层锂元素丰度.通过研究这些类太阳色球活动恒星锂丰度和X射线光度之间的关系,发现X射线光度强的类太阳色球活动恒星锂丰度值大于X射线较弱的恒星.也就是说活动性较强的类太阳色球活动恒星其锂丰度较高,活动性较弱的类太阳色球活动恒星其锂丰度较低.考虑到主序的类太阳恒星锂元素和恒星自转速度随着恒星年龄的增加逐渐减少,以及随着类太阳色球活动恒星自转速度的减小,色球活动又逐渐变弱.因此类似于锂丰度,