振动

In vibration analysis, the vibration of 16 Hz to 31.5 Hz is larger than other bandwidths.

在振动频谱分折上，以振动频率16Hz~31.5Hz的加速度较大，主要的原因来自於曳引机的引擎所造成。

Firstly,the general relation between radiated noise and surface vibration is established and the radiation ratio is discwsed.

首先阐明了发动机表面辐射嗓声和表面振动之何的关系并对辐射比进行了较为详细的讨论；而后通过实验研究了发动机各部件的表面振动特性。

Theoretically,the intershell coupling makes energy bands of multiwalled carbon nanotubes split and the degeneracies in the energy bands reduced,and the bandgaps of multiwalled carbon nanotubes decreased.The small bandgaps of multiwalled carbon nanotubes ensure the presence of a vibrational manifold in the optical region for each shell so as to minimize optical emission.

计算结果表明，层间耦合使多壁碳纳米管的能带分裂，能级简并度降低，同时使多壁碳纳米管的带隙减小，小的带隙确保了每层中都存在振动模式，多数激发态电子通过相邻管的快速振动转化能量而产生无辐射跃迁，使其荧光很难观察到。

The experimental results show that this method can realize the measurement of micro-vibration, and the micro-vibration displacements measuring range can be up to 5～775 nm.

实验结果表明，该方法能实现微振动信号的测量，对微振动位移的测量范围可以达到5～775 nm。

Concerned in this paper are the eigenvalues and the corresponding eigenfunctions for the crosswise vibration equation of a bean with continuous load, which can be related to a differential integral equation.

本文研究了附加连续荷载梁的横向振动方程的特征值及特征函数的性质。在一定的假设之下，附加连续荷载梁的横向振动方程对应一个微分积分方程。

By using the model, the vibration level can been pred...

简化模型虽然能较准确的预测出地面振动的强烈程度，但在分析振动频率成分方面存在着不足。

The sound of the universe is the vibration thought by some to be like the music of the spheres that the Greek Pythagoras described in the 6th century B.C.

宇宙振动的声音被有些人认为是像公元前6世纪希腊毕达哥拉斯人所描述的'音乐之球'；另一种声音Ahata Nad或已破坏声音，是接近地球的下层空气振动的声音。

In chapter two, we study the oscillations of a kind of secon...

第三章讨论了脉冲中立型方程的振动性，通过建立一些引理，得到了方程振动的一些充分条件。

Primary parametric resonance of a parametrically excited simply supported thin rectangular plate on nonlinear elastic foundation is analyzed.

分析非线性弹性地基上受参数激励小挠度矩形薄板的主参数共振问题，由冯卡门方程和伽辽金方法得到系统的非线性振动方程，它是杜分-马休型方程，应用非线性振动的多尺度法得到平均方程。

Based on the elastic theory of large deflection and by taking into account the variation of the axial force and its effects on bending deformation of the drillstring in vertical section ,the vibration of the drillstring induced by fluctuating weight on bit is described by a parametrically excited system.

基于弹性大变形理论，考虑到轴力沿钻柱轴线的变化及其对钻柱弯曲变形的影响等因素，将受自重作用的铅垂井段钻柱在波动钻压激励下的振动转化为一个参数激励系统，用 Galerkin方法首次得到了描述此系统的 Mathieu方程，并通过将方程的解展成富里叶级数的方法，得到了该振动系统的动力分岔值曲线及其所包围的动力不稳定区。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷