查询词典 oscillation

On the interannual timescale, two waveguides of planetary waves in the northern winter have antiphase oscillation. On the one hand, this interannual oscillation has an interaction with the Northern Annular Mode. On the other hand, it exerts influence on the climate anomalies over East Asia.

在年际时间尺度上，冬季行星波两支波导的变化存在反相关的振荡关系，这种年际振荡一方面影响了北半球环状模的位相，另外一方面导致了东亚地区的气候异常。

In this paper,the asymptotic property for two kinds of ecological systems and oscillation for solutions of a neutral differential equations is studied by employing differential inequalities and using eigenvalue analysis,iterative algorithm,induction and comparison theorem etc.Here, the system\'s asymptotic property includes the uniform persistence,the global attractability of the solutions,the asmptotic stability of the solutions and the oscillation of solutions.

本文利用微分不等式、特征根分析法、迭代法、归纳法及比较原理等方法和理论，研究了两类生态模型解的渐近性和一类脉冲中立型微分方程解的振动性，其中包括模型的一致持久生存性，正平衡态的全局吸引性、局部与全局渐近稳定性以及解的振动性。

By analyzing the reason of the numerical oscillation phenomenon and computing the temperature field in plate rolling process,it is found that numerical oscillation can be restrained effectively when the heat capacity matrix is lumped by using backward difference scheme.

近年来，许多研究人员采用有限元法分析热轧和淬火等过程中的瞬态温度场。

Applied conductance law is kinetic to reaction of bee glue enzymatic catalysis undertake study, result discovery, in bee glue - in enzymatic system, be in without oscillation phenomenon; bee glue - enzymatic - inside NaCl system, electrical conductivity lifts quickly, appeared only 3 more apparent fluctuant peaks, accumulate period longer, it is 10~20 Min about, accumulate period afterwards, electrical conductivity lifts quickly reduce quickly again, fluctuant and gently; is in after 40 Min bee glue - enzymatic - inside KCl system, response is quick, oscillation period is 20 Min about, the wave motion after 30 Min is slow till platform reacts,stop.

应用电导法对蜂胶酶催化反应动力学进行探究，结果发现，在蜂胶-酶体系中，无振荡现象；在蜂胶-酶-NaCl体系内，电导率急剧升高，只出现了3个比较明显的波动峰，积累期较长，大约为10~20 min，积累期过后，电导率迅速升高又迅速降低，40 min后波动平缓；在蜂胶-酶-KCl体系内，反应迅速，振荡期大约为20 min，30 min后波动缓慢直至平台反应终止。

Due to the electro-mechanical coupling, the subsynchronous oscillation occurs in the system,which causes the oscillation of electric current, electric voltage and the torsional oscillation of the set of axes.

网机系统机电耦联失稳振荡的分岔与混沌研究项目，共发表学术论文30篇（期刊论文23篇，会议论文7篇），其中SCI收录3篇，EI收录9篇，ISTP收录3篇，使我们的研究大大超额完成任务。

In the research on the backward-wave oscillation suppression the startoscillation current which is derived from Two-wave theory approximately is given up. Four typical un-uniform slow wave structures start-oscillation current equations are derived by backward-wave amplifing gain expressions with the Two-wave theory. Then the start-oscillation current rates I〓/I〓 between ununiform circuit and uniform circuit of the four structures have been got.

在返波抑制问题的研究中，从二波理论出发，抛弃了二波理论中从起振条件出发来得到起振电流近似表达式的方法，而是利用二波理论的基本关系式分别推导出了四种典型实用的非均匀输出线路的返波增益表达式，采用计算返波增益的方法来得到四种非均匀输出线路的起振电流与均匀输出线路起振电流的比值I〓/I〓。

This paper also presents an improved oscillation circuit according to the expression of oscillation frequency, and puts forward another method of analyzing oscillation circuit.

根据振荡频率的表达式，给出一种改进后的电路，提出了振荡电路的另一类分析方法。

However, based upon the results indicated above the heat transfer rates with certain combinations of the oscillation amplitude and Rayleigh number or Grashof number are possibly smaller than that of the stationary condition. Then the critical oscillation frequency could be regarded as a criterion of whether the heat transfer rate of the heat surface subject to a oscillation motion being larger than that of the stationary state or not .

虽然一般的观念大都认为存在振动的热表面其热传的效果会比没有振动的情形下要好，但是由研究结果得知，在不同的振幅与雷利数或葛瑞秀夫数搭配时，加入振动后的热传现象仍可能比没有振动时的热传效率差，也因此可以定义且找出临界振动频率以提供研究振动热传者之参考。

Secondly, it is concluded that all these researches above supported the conclusion that the thermoacousitic oscillation in combustor is the self-excited oscillation with feedback that produced the limit cycle oscillation with stable amplitude.

最后将其扩展到多旋流预混燃烧，试验比较了不同组分模拟合成气在三种多旋流模型燃烧室中进行预混燃烧的不稳定燃烧特性。

Main contents are as follows :In chapter one, we give a survey to the development and current state of the oscillation of differential equations and difference equations. We also introduce some preliminary material , including some basic concepts of the oscillation theory and some important fixed point theorems.In chapter two, we investigate the oscillation of second order self-conjugate differential equation with impulses.

本文由五章组成，主要内容如下：第一章概述了微分方程及差分方程的应用背景和国内、外研究状况，这一章也包括一些预备知识，如有关微分方程、差分方程理论的基本概念和重要的不动点定理。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。