强制振动

Express the differences of displacement variation of a mass subjected by a free damped vibration and a forced vibration, separately.

分别叙述一质量受到无阻尼的振动与强制振动时位移变化的不同。

The present experimental study investigated the mechanism of the self-exciting thermo-acoustic oscillation and the forced thermo-acoustic oscillation.

通过实验，揭示了热声自激振动与热声强制振动现象发生的条件与机理，研究了热声发动机的关键部件——板叠的形状与材质对系统的起振温度的影响。

Using the forced oscillation technique and micro-computed tomography, we now show that airway hyperresponsiveness in allergic mice can be largely explained by airway closure.

采用强制振动技术和微焦点CT扫描成像技术，我们可以认为过敏性小鼠气道高反应大部分可以由气道关闭来解释。

For solving the problem that mixing quality,vibration intensity and working reliability can not be ensured at the same time in the study of vibratory mixing,authors put forward a new vibratory mixing technique.

针对振动搅拌技术中搅拌质量、振动强度和机器工作可靠性不能兼顾的问题，在前期试验研究基础上，提出一种新的振动搅拌技术，认为以搅拌轴和搅拌叶片作为振动活化源，振动和强制搅拌相结合的实施方案是合理的。

Finally, the so called critical oscillation frequency can be expressed as a function of oscillation amplitude and Grashof number in all the natural, mixed, and forced convection scenes.

最后，有关临界振动频率的经验公式在强制对流、混合对流以至於自然对流的形式皆不相同，本文皆已分别推导出来，且在三种的对流形式中都有相当平滑的曲线可以获得。

In addition, you can randomize your playlist, force a specific volume or simply let your device vibrate.

此外，您可以随机播放列表，强制一个特定的数量，或只是让您的设备振动。

Firstly, the mechanism of heat transfer enhancement by oscillation heat surface is discussed in natural convection scene. For different oscillation amplitude and Rayleigh number, the frequency that the heat transfer rate of oscillation heat surface is higher than non-oscillation condition is found and called critical oscillation frequency. The limitation enhancement of similar physical model is still researched by this study in mixed and forced convection scenes for different amplitude and Grashof number. Generally, that a heat surface subject to a oscillation motion is advantageous to convective heat transfer is a well-known tuition.

首先探讨在垂直管道内振动高温面於自然对流领域内提升高温面热传效率的机制，并且针对不同的振幅与雷利数求得加入振动条件后，高温面散热效果可以优於稳态非振动高温面散热效果的临界振动频率；进而探讨当垂直管道流进入混合对流与强制对流范围时，在不同的振幅与葛瑞秀夫数下，亦可发现加入振动条件后，振动高温面之散热效果可以优於稳态非振动高温面散热效果的临界振动频率。

Firstly, the mechanism of heat transfer enhancement by oscillation heat surface is discussed in natural convection scene. For different oscillation amplitude and Rayleigh number, the frequency that the heat transfer rate of oscillation heat surface is higher than non-oscillation condition is found and called critical oscillation frequency. The limitation enhancement of similar physical model is still researched by this study in mixed and forced convection scenes for different amplitude and Grashof number.

首先探讨在垂直管道内振动高温面於自然对流领域内提升高温面热传效率的机制，并且针对不同的振幅与雷利数求得加入振动条件后，高温面散热效果可以优於稳态非振动高温面散热效果的临界振动频率；进而探讨当垂直管道流进入混合对流与强制对流范围时，在不同的振幅与葛瑞秀夫数下，亦可发现加入振动条件后，振动高温面之散热效果可以优於稳态非振动高温面散热效果的临界振动频率。

This shock increases the vibrating force working on the concrete and finally causes the compaction of the blocks.

设计上增加了栈板的强制限位支撑，当向下运动时，栈板冲击限位支撑，冲击使激振力倍增，最终形成对砌块的振动压力。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。