小振动

ANSYS software was used to analyze the two models. Results When Couette flow was loaded, the stereocilia had a larger angular displacement in non-coupled manner, Von Mises stress were higher on tip link and rootlet, and the characteristics of natural frequency were quite similar on two models.

结果 模拟Corti器振动过程，在相同剪切流的压力作用下，静纤毛在不接触盖膜时表现偏移度较大；两种模型均表现在静纤毛顶连接及小根基部应力较高、固有频率近似。

The vibro-impact systems are familiar with the non-smooth dynamic systems.The dynamics research of the vibro-impact systems not only is significant in theory but also has practical values in engineering.Firstly,using the Poincaré map method,we get an existent criterion of single impact period-n motion in a two-degree-of-freedom vibro-impact system with damper.It is shown that our conclusions are valid through the numerical simulations.Moreover,the satiability of periodic motions is studied and the correspon...

基于Poincaré映射的方法，通过解析的方法导出了一类具有阻尼的两自由度碰撞振动系统的单碰周期n次谐运动存在性判据，经过数值模拟验证了理论分析的正确性，并给出了分析其稳定性的判别公式，通过数值模拟，讨论系统的局部分岔与全局分岔，同时比较了系统参数变化对其周期运动的影响，发现在强阻尼、弱激励、小质量比、较大恢复系数下系统将会出现较多的有规律的周期碰撞。

This seater has a switch which controls the vibration. No wonder he nevers cries in there

这个小躺椅下面有开关，打开了会振动的，难怪他坐进去后从来就没哭过。

Then it analyzes the unstable and stable signals by applying Short Term Fourier Transform , Wavelet Packet Auto-Regressive Model Spectrum , the Second Order Cyclostationary Spectrum as well as chaos-fractal theory, extracts the fault features of analysis objects.

采用了短时Fourier变换、小波包AR谱、二阶循环谱方法及混沌分形理论分析了稳态和非稳态振动信号，提取出了分析对象的故障特征。

Electromagnetic vibrating sifter from the electromagnet, screen, frame, spring contactors etc., using a higher frequency and smaller amplitude of vibration.

电磁震动筛粉机由电磁铁、筛网、架、弹簧接触器等组成，利用较高的频率与较小的振幅产生振动。

With the help of the multi-resolution analysis, the singular part in the vibrational signal is abstracted to distinguish the periodic signal, so the useful information for fault diagnosis is got.

将小波分析技术应用到车辆变速箱的奇异点检测中，通过多分辨率分析提取振动信号中的奇异信号，将其周期信号分开，为故障诊断提供了有用的信息。

The analysis results from gear vibration signals show that the fault diagnosis method based on intrinsic mode singular value decomposition and support vector machines can extract fault features effectively and classify working conditions and fault patterns of gears accurately even when the number of samples is small.

对齿轮振动信号的分析结果表明，即使在小样本情况下，基于内禀模态奇异值分解和支持向量机的故障诊断方法仍能有效地识别齿轮的工作状态和故障类型。

The wavelet packet analysis applied in fault diagnosis system is studied in this thesis. Using simulation fault data, uncalm and time difference vibration signal of sodium pump are decomposed on different levels and frequencies.

对小波包分析应用于故障诊断进行了研究，利用仿真出来的故障数据，将快堆钠泵非平稳时变振动信号分解到不同层次和不同频带上，有效地提取出反映钠泵不同故障的特征向量，在识别中得到了满意的结果。

The wavelet packet analysis applied in fault diagnosis system is studied in this thesis. Using simulation fault data, uncalm and time difference vibration signal of sodium pump are decomposed on different levels and frequencies. To picked-up the eigenvectors reflecting different fault of sodium pump with availability, simulation results have shown its satisfaction in the identification.

对小波包分析应用于故障诊断进行了研究，利用仿真出来的故障数据，将快堆钠泵非平稳时变振动信号分解到不同层次和不同频带上，有效地提取出反映钠泵不同故障的特征向量，在识别中得到了满意的结果。

The environment temperature has heavy influence on the static contact resistance and the maximal contact resistance in the closing process. But has less influence on the bounce time and the vibration time.

3环境温度对静态接触电阻和接触电阻峰值的影响很大，对弹跳时间、振动时间和过渡时间的影响较小。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。