查询词典 oscillation

According to coherent population oscillation and gain theory, the analytic expression of the group index from rate equation is obtained.

根据布居振荡效应及增益理论，由速率方程出发，得到了探测光的群折射率的理论解析表达式。

Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron, and there is an emergence angle in which the electron has the maximum trajectory length and impact energy, Impact energy will increase and return time will reduce as increasing the amplitude of electric field, and both parameter would oscillate with the phase of electric field, which can essentially explain that multipactoring electron number oscillates in twice the frequency with the increase of microwave frequency, electron trajectory will change from parabolic-like movement to complex oscillation.

研究发现：电子出射角度对其运动状态有显著影响，电子存在运动轨迹最大的某一出射角度，该角度下电子拥有最大的撞击能量；微波电场幅值的增加将使电子撞击能量增加，返回时间减小，微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡，这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因；随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

The results show that a complicated oscillation will happen when the angular frequency increases.

研究结果表明，负折射率材料的热发射率随角频率的变化呈现复杂的振荡现象。

The spring constant, the mass, the constant of attenuation and the angular frequency of the exciting oscillation can be changed within certain limits.

弹簧振动的劲度系数、质量、衰减量和角频率可以在一定限度内被改变。

Moreover compared with the Taylor series solution, the frequency shifts in our solutions appear in the expression of oscillations of all orders in both classical and quantum cases, so multiple-scale perturbation method is more suitable for solving the weak-coupling anharmonic oscillation than the Taylor series approach.

与Taylor级数解相比较，无论是在经典还是在量子解中频率移动都出现在各阶振动表达式中，所以多尺度微扰解是弱耦合非简谐振动的较好解法。

The power system forced oscillation introduced by anharmonic periodic disturbances is then discussed. The effect of complicated pressure pulsation, ballistic pressure pulsation and quasiperiodic pressure pulsation on the stability of power system based on a single machine infinite bus power system and multi-machine power system are analyzed respectively through simulation.

从理论上探讨非简谐周期性扰动下的电力系统强迫振荡，并通过时域仿真分析单机无穷大系统和多机系统中汽轮机复杂压力脉动、准周期压力脉动及冲击性压力脉动对电力系统稳定性的影响。

Global climate oscillation also has apeak period of 7a,and 11a,which is consistent with rainfall periodical behavior here.

鼎湖山区域大气降水的第一显著周期是7a，其次是lla，而7a、1la的周期也是全球气候振动中最显著的特征之一。

The article predictes in farmer s increasing income fluctuation by the wavelet transform in 1976-2006.The Result shows that:Chinese armer income fluctutions appears the characteristic time scale 7 and 40 years keeping consistent with the periodic oscillation.

文章运用小波变换对1976—2006年间农民收入的波动关系进行预测分析，实证检验结果显示：全国农民人均纯收入增长具有7年和40年左右的特征时间尺度，与农民人均纯收入变化存在着7年和40年两个主要周期振荡保持一致。

This paper analyzed and researched the characteristics of Schmitt trigger, single-stable-state trigger and astable multivibrator constituted by 555 timer based on PSPICE. Against the phenomenon of astable multivibrator constituted by 555 timer has no oscillation in PSPICE, an effective analysis method was brought out for 555 timer circuit to simulate the actual oscillator.

作者在文中应用PSPICE对555定时器构成的施密特触发器、单稳态触发器和多谐振荡器的工作特性进行了仿真分析和研究，针对PSPICE中555定时器构成的多谐振荡器不起振的问题提出了模拟振荡电路的有效起振方法，对电子电路的分析与设计具有一定的参考意义。

Many results have been gain about the equation's oscillation, asymptotic behavior and stability, etc.

此外，在讨论方程的振动性的时候，我们分三种情形得到了方程振动的充分性判据。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。