小振动

Based on the theory of force transmissibility ,the model of a vibration isolation system was established through an example.

基于振动力传递率理论，通过实例建立隔振系统的模型，并应用有限元软件对模型进行优化设计，通过对隔振器参数的寻优，使传递至基础的力最小。

Lastly, in accordance with the actual situations of the prototype structure of mosque pagoda, based on the similar relation of model experiments, a model structure of mosque pagoda with a similar coefficient of 1/10 is designed and fabricated. Earthquake simulating shaking table tests are performed on the model structure of pagoda in the cases the AB type passive control system with SMA dampers is erected or unerected. The leading earthquake responses like the relative drift at the top of the main tower and the small tower, interstory drift ratio, acceleration, and cracking process of the pagodas body etc. are studied. The operational behaviors involving the deformation capacity and energy dissipation capacity is tested for passive control system with SMA dampers under the earthquake excitation, and the corresponding control mechanism and regularity is also analyzed. Furthermore, the performance changes and protection effectiveness is comprehensively evaluated while the model structure of pagoda is seismically protected or not.

最后，根据光塔原型结构的实际情况，以模型试验的相似关系为基础，设计并制作了一个相似系数S，为1/10的光塔模型结构，并先后进行了未安装和安装A、B型SMA阻尼器被动控制系统光塔模型结构的地震模拟振动台试验，研究了模型结构在3种不同工况下，主塔顶部和小塔顶部的相对位移、层间位移角和加速度以及塔体开裂等光塔结构的主要地震反应，测试了SMA阻尼器被动控制系统在地震激励下的变形能力和消能能力等工作性能，分析了相应的控制机理和控制规律，并从总体上评价了光塔模型结构抗震保护前后的性能变化和保护效果。

Because of the time delay unsynchronized control force may be applied to the structures, which may cause degradation in the efficiency of control or may even render the structures unstable. There for, it is of importance to make research on the time delay problem.

时滞是振动主动控制中不可避免存在的现象，即使是小时滞，也会导致系统在不需要能量时作动器向系统输入能量，致使主动控制效率的降低，甚至导致系统响应发散。

The crvstalline of doped PPVs was destroyed via WAXD analysis, which demonstrated the crystalline have no relationship with the PL intensity and vibronic structure.

从PL光谱和UV-Vis光谱都可以看到聚醚掺杂PPV有明显的振动结构，且发光强度和谱峰形状受热转化温度的影响小。

A small, pointed stylus used to transmit vibrations from the grooves of a phonograph record.

唱针：小而尖的唱针用来传递唱片凹槽的振动

By means of simulink of Matlab, it is known that the method that electric field is strengthened and two damp holes are turned on can lead to transfer ratio of force to be fallen during the phase of low frequency; on the other hand, the method that electric field is weakened and two damp holes are turned off can lead to transfer ratio of force to be fallen during the phase of high frequency.

通过Matlab仿真计算可知，振动物体在低频阶段，加大电场和开启两阻尼孔能使力传递率较低；而在高频时，关闭电场和阻尼孔，其力传递率较小。

Other cause can be vibrations of the print head letting small air bobbles inside the print head preventing the ink head of firing one ore more nozzles, also change of cartridges can let a little bit of air inside the ink system, in case of missing nozzles it will look like white line within the print, then push the pump bottom for a few seconds, please have a JetMaster tissue in front of the head when using the pump, otherwise you are facing ink all over your machine, the ink can spray more than one meter out of the print head using this function, so please use it carefully.

喷印头的振动释放的小茸球在喷印头中阻塞喷头的一个或多个喷嘴的射击，同时和的变化会使一点空气进入油墨系统，避免喷嘴的缺失。然而当喷嘴丢失时，喷印看起来像白线，这时推动操作泵底部数秒。请在顶端前有Jet Master棉纸时，使用操作泵，否则油墨会溅到机器上，可溅出喷印头1米多。因此，请谨慎使用。

The results show that both methods of wavelet and EMD are effective, while the method based on EMD, which filters signals and eliminates the noise selectively according to spectrum character of decomposition signal, is the optimal method that can sufficiently keep the non-stationary character inhered in signal and provide well auto-a-daptability, flexibility and affectivity and feasibility in filtering and denoising of rock blasting and impact fragmentation signals.

结果表明：采用小波与EMD 2种滤波、消噪的方法都能获得较好的效果，而基于EMD滤波、消噪法是依据信号分解结果的频谱特性进行选择性的滤波和消噪，更能充分保留信号本身所固有的非平稳特征，具有自适应强和灵活、有效的特点，是一种更好的爆破振动信号滤波、消噪法。

The less something jiggles about because of heat-induced vibration, the longer it can remain superposed.

一个物体受到的热振动越小，它能够保持叠加态的时间就越长。

The test results presented indicate that both G_ will produce additive attenuation under cyclic dynamic loading, and the relative density take no effect on Fujian sands but obvious effect on Qiantangjiang silts.

结果表明，循环振动下砂土与粉土G_均产生明显的附加衰减，不同相对密度对砂土G_甜变化规律的影响较小，而对粉土的影响较大。

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。