查询词典 existence

Thirdly, by using the differential inequalities method, the existence, uniqueness and its asymptotic behavior of solution for the problem are studied.

然后，利用微分不等式方法，研究了问题解的存在、唯一性和渐近性态。

Second, by studying the asymptotic behavior of the solution, we obtain the existence of random attractor for the stochastic quasi-geostrophic dynamical system.

另一方面，通过研究解的渐近行为，我们得到随机准地转动力系统的随机吸引子的存在性。

Using the fixed point principle and the theory of differential inequality, we prove the existence of the solution and an uniformly valid asymptotic expansions of the solution is given as well.

利用不动点原理及微分不等式理论，我们证明了边值问题解的存在性，并给出了解的一致有效渐近展开式。

Under suitable conditions,and by using the theory of differential inequalities, the existence and asymptotic behavior of solution for the boundary value problems are studied.

在适当的条件下，利用微分不等式理论，讨论了该边值问题解的存在性和渐近性态，给出了渐近估计式：u0-Ui0-u0(0)+O≤u≤u0+O，0≤x≤1。

So there are many papers devoted to the investigation of existence and uniqueness problems, asymptotic behaviour of solutions, and so on.

我们知道现实世界中的许多模型不单单只是单个的演化方程，更多的是以方程组的形式出现的。

In this paper,by using the comparison theorems and constructing suitable Lyapunov function, the sufficient conditions are obtained for the permanence and existence of globally asymptotically stable positive periodic solution of the system.

研究了具有反馈控制的n种群非自治周期竞争系统的持续性，利用微分不等式并构造适当的Lyapunov函数得到系统存在惟一、全局吸引的正周期解的充分条

This paper consists of three parts:We first consider the non-autonomous predator-prey system with both Beddirigton-DeAngelis functional response and dispersion. By using comparison theorem of differential equation, we study the permanance of the system. After that, by constructing suitable Lyapunov function, we obtain some sufficient condition which guarantee the existence of globally asymptotically stable almost periodic solution of the system.

本文研究三方面的内容：第一部分考虑具有扩散和Beddington—DeAngelis功能反应的捕食-食饵系统，利用微分方程比较原理得到该系统一致持续生存的条件；通过构造适当的Lyapunov函数得到了该系统存在全局渐近稳定概周期解的充分条件。

Any expense which at the time of happening is covered by, or would, but for the existence of this Policy, be covered by any other existing insurance certificate, policy, or state scheme.

所发生的费用已在其他的保险凭证、保险单或社会保险计划中得到赔付的部分。

In ultimate sense, the reason that culture carrier becomes an inevitable existence lies in two thirsts of people: the thirst for athanasia and the thirst to surpass the limitation of substance.

从终极意义上讲，文化载体之所以成为一种无可替代的存在，正是源于人的两种渴望：渴望生命的永恒和渴望对"物"的超越。

Athanasius or not, and most probably it cannot, it undoubtedly owes it existence to Athanasian influences, for the expressions and doctrinal colouring exhibit too marked a correspondence, in subject-matter and in phraseology, with the literature of the latter half of the fourth century and especially with the writings of the saint, to be merely accidental.

是否信条可以归因於圣athanasius与否，并极有可能不能，它无疑是欠它的存在，阿他那修信经的影响，又为表现形式和教义填色展品太明显的对应，在学科此事，并在言词上，随著文学下半年四世纪，特别是与著作的圣人，只是偶然的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。