振动

ABSTRACT This paper summarized the study and application state of the technology on coal dry beneficiation with common fiuidized bed and vibration fluidized bed , elaborated the theoretical basis that VFB can beneficiate fine coal.

本文综述了普通流化床干法选煤技术及振动流化床技术应用与研究的现状，阐述了振动流化床分选细粒煤的理论依据。研究了适合于细粒煤分选的振动流化。。。

On strength computation,the finite element models of rotating mirror were established according to the real structure of the mirror,and the rotating three-faced beryllium mirror were analysed.Results display that the surface deformation magnitude of the mirror is approximately 0.334 6 μm,and the maximum stress is 0.204 GPa at 600 m/s of edge linear speeed.The regions of maximum stress are on the axial hole and symmetric to symmetrical planes of mirror body,and keep beelines to surfaces.On the modal analysis,the results show that the first and second modals of bending vibration exist around 3.4×105 r/min and 6.6×105 r/min,which appear binate and orthogonal respectively,and another modal belongs to the first torsional vibration that occurs by 5.13×105 r/min.

运用该方法得出转镜镜面变形量、内部应力分布和振动模态参量的定量数值：在边缘线速度600 m/s下，三面体铍转镜的最大变形量为约0.334 6 μm；最大应力0.204 GPa，位于轴孔附近并与镜面距离最短处；两个在互相垂直平面内的一阶弯曲振动模态发生在3.4×105 r/min附近，一阶扭振点位于5.13×105 r/min附近，两个二阶弯曲振动点位于6.6×105 r/min附近。

For the sake of investigating the vibration problem of blade with platform dry friction damper, we introduce the transfer matrix method for calculating the catenulate structure system, and give the transfer matrix method for calculating the blade vibration.

为了研究带缘板干摩擦阻尼器叶片的振动问题，本文将用于链状结构系统的传递矩阵法引入到板状结构的叶片振动计算之中。简化叶片结构的物理模型、推导各种站型的传递矩阵，并用算例说明传递矩阵法在模型叶片振动计算的应用。

The IR result shows that conjugative effect is the reason for the red shift of stretching vibration frequency for carbonyl, meanwhile hydrogen bonds lead to the red shift of stretching vibration frequency for hydroxy groups.

红外振动光谱结果发现，共轭效应导致了羰基伸缩振动频率红移，氢键的存在导致了羟基伸缩振动频率红移。

This paper makes analysis on the vibration of the bearing block of the small gear caused by the unbalance, the disalignment of the erection of the vibrating coupler , the unreasonable erection of the gears, the loosening of the bolts and the vibration of the bearing itself, etc.

重点对由不平衡、振动联轴器装配不同轴、齿轮装配不合理、螺栓松动及轴承本身振动等造成小齿轮轴承座振动的原因进行了分析，并提出了相应的治理措施。

Using ethyne as source gas, CNTs were successfully synthesized by CVD method. By comparing different synthesis technics, the influences of parameter to the grow of CNTs, such as catalysts, growth time, reaction temperature and ratio of all kinds of carrier gases were investigated. The results showed that the influence of carrier gas, reaction temperature, and the growth time on synthesis of CNTs was significant. In conclusion, a better condition for carbon nanotube growth was obtained. Through analyzing Raman Spectrum of samples, GM and SWNTs' characteristic peak-RBM was indicated.

采用乙炔为碳源、氢气和氩气为载气，利用气相催化热解法在AAO模板上成功的制备出了纳米碳管，用TEM，SEM，EDS，Raman等表征方法研究了生长温度、裂解时间、载气含量和不同催化剂对碳纳米管的石墨化程度、产物形态的影响，指出了单壁碳纳米管的特征振动模式—径向呼吸振动模以及拉伸振动模式G模，缺陷导致的D模，并采用蒸金后的样品进行了场发射的测试，得到了F-N曲线，与理论符合较好。

In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate. In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration, and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given.

针对星间相干激光通信中卫星平台的振动造成发射天线和接收天线的瞄准角误差，使系统信号信噪比下降，误码率增加，该文以瑞利分布作为振动造成的瞄准角误差模型，结合高斯本振光和艾里信号光外差检测模型，以PSK零差通信体制为例分析卫星振动对系统的瞬时误码率和平均误码率的影响，给出误码率仿真计算结果。

Severe vibrations of hydroturbine units had occurred in some hydropower plants, with the increase of capacity and the water head.

随着水电建设的快速发展，机组容量和尺寸急剧增大，转速相应提高，机组振动及其诱发的水电站厂房结构振动问题日益突出，对机组振源和振动的研究更加紧迫。

The nature of another metal-sensitive vibration mode at 1110-1116 cm-1, which was previouslyassigned to the C-H bending,is now re-assigned as an isoindole breathing mod e with some small contribution also from C-H in-plane bending.

另一个对金属大小敏感的振动区在1 110一1 1 16cm一'之间，这一特性己被定义为带有C一H平面弯曲振动的叫噪坏的呼吸振动模式。

For both series of heteroleptic tris rare earth compounds, the characteristic phthalocyanine dianion IR bands for Pc2- and O OPc2- at ca. 1329 and 1380 cm-1 attributed to the pyrrole stretching and the symmetric C-H bending of -CH3 groups in octyloxy side chains of OOPc rings together with some small contribution from the isoindole stretching vibrations,re specteively,are simultaneously found in their IR spectra.

在这两个不对称三明治型稀土配合物系列的红外光谱中发现了这样一种特性，即酞菁阴离子Pc~(2-)和OOPc~(2-)的特征波段在1329cm~(-1)和1380cm~(-1)之间，这是因为吡咯的伸缩振动和OOPc环中八烷氧基侧链上-CH_3基团的对称C-H的弯曲振动共同作用于吲哚环的伸缩振动。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。