查询词典 vibration period

Aiming at the signal processing problems that exist in online fault diagnosis for train running gear, based on discussing the principle of characteristic spectrum analysis, a method of full period and uniform angle sampling is applied, which transfers the vibration signal from time domain into angular domain. The angular domain signal is transferred into corresponding characteristic spectrum using FFT. Through spectrum estimation and analysis, fault characteristic spectrum values of running gear components are acquired to distinguish their faults.

在讨论特征分析方法原理的基础上，针对机车走行部故障在线监测过程中存在的信号分析与处理问题，运用整周期等角度采样方法将时域振动信号转换为角域信号，采用FFT变换将角域信号变换为对应的特征频谱，通过谱估计、谱图分析得到机车走行部各零部件的故障特征谱值，再根据该特征谱值识别机车走行部各零部件的故障。

2 Yuan price of 3 million bottles of bubble liquid and plastic pipe in a plastic bag tied with a blowpipe top post batteries, from a period of post-core plastic pipe and a sheet post-core group into a plastic tube smaller than the cigarette mouth, blowing bubbles, the whistle sounds after the film vibration.

价格2元~3元，泡液瓶与塑料吹管并列装在一个塑料袋内，吹管顶端嵌着一个哨芯，哨芯由一段塑料管和一个片状哨芯组成，塑料管比香烟嘴小一号，吹泡泡时，哨片震动后发音。

Based on the analysis for the dynamic characteristics of semi-rigid steel frames with simple or multiple degree-of-freedoms,effects of rotation stiffness of beam-to-column connections on the structure period,frequency,critical damping and mode of vibration are discussed.

通过对单自由度体系和多自由度体系半刚接钢框架的动力特征分析，初步探讨了梁柱连接转动刚度对结构自振周期、频率、临界阻尼以及振型等参数的影响。

But after the structure enters the non-linear deformation stage, the period and the vibration mode of the structure is changed gradually.

而结构在进入非线性变形阶段后，周期、振型都发生变化，因此这种转换方法对于受高振型影响较大的中高层结构存在较大误差。

Jump for the most common eyelid orbicularis oculi muscle of the "little muscle vibration syndrome", each jump a few seconds to several minutes; normal circumstances as long as a period of time after the automatic recovery, but also close your eyes a rest look, or deposited his eyes with hot towel, as well as with a balanced diet and adequate sleep, to shorten the eyelid beating time.

跳为最常见的眼睑眼轮匝肌的"小肌肉振动综合症"的肌肉，每几秒钟到几分钟的时间，如在一段时间内维持正常情况下，自动恢复后跳，也闭上你的眼睛休息一下看看，或用热毛巾存入他的眼睛，以及均衡饮食和充足的睡眠，以缩短眼皮跳动的时间。

The maximum run-out distance is 3200m. The three cases are studied from the Niuquangou rockslide-debris flow at the south west segment of the main seismic fault, the Chengxi rockslide at the middle segment of the main seismic fault and the Donghekou rockslide-debris flow at the north east segment of the main seismic fault.The three cases illustrates following common characteristics:(1)parent rockmass is broken under long geologic processing and weathered;(2) Rockmass was separately expanded and thrown under long-period strong ground vibration in which the vertical motion was predominant along the main seismic fault;(3)sliding mass was crashed at the exiting zone and transferred to fragment material;(4) The secondary landslide was triggered underneath the exiting zone due to the powerful crashing and shaving processes that provides more mass to debris body and cushion shape;(5) The a long run-out distance fragment flow is occurred under air layer lubrication. The air layer was pressed and turbulently flowed in the narrow-shaped valley, or laminarly flowed in the extensive flatland.

本文重点解剖了位于地震破裂带南西段的汶川映秀牛圈沟滑坡-碎屑流、位于地震破裂带中段的北川城西滑坡和位于地震破裂带北东段青川东河口滑坡-碎屑流3个典型实例，认为具有如下特征：1）岩性条件：母岩遭受长期构造动力作用，呈碎裂岩体，后期被强烈风化，岩体极为破碎；(2）抛掷效应：位于汶川地震主断裂带或附近，垂直加速度大于水平加速度，强地面运动持时长，岩体发生振胀和抛掷；3）碰撞效应：上部滑坡体发生高位剪出和高位撞击，致使岩体碎屑化；(4）铲刮效应：撞击作用导致下部山体被铲刮，形成次级滑坡，为碎屑流体提供了足够展翼和抛洒物源体积；5）气垫效应：碎屑化岩体快速抛掷导致下部沟谷空气迅速谷状圈闭和向下紊流，形成气垫效应，或者，在下部地形开阔地带压缩空气呈层流状态致使滑体凌空飞行。

After that, numerical examples of period vibration and destroy of the spherical shell are presented.

给出了球壳产生周期振动和最终被破坏的数值算例。

The calculated results show that adopting damping apparatus is a feasible measure for solving aseismic safety of a aqueduct, and that appropriately prolongating period of a vibration-isolationg structure and regulating damping are an effective way of controllong aqueduct vibration.

控振计算表明，采用减隔震装置是解决渡槽抗震安全的可行措施，适度延长隔震结构周期与调整阻尼是控制渡槽振动的有效途径。

Results show that the small vibration of this ideal model is non-simple harmonic,and the period of vibration in x direction and y direction are inverse ratio to the amplitude inverse ratio to the amplitude respectively,but influenced a little by them,and the waveform that coul.

本文应用拉格朗日方程方法研究了理想对称四弹性振子做二维运动的变化规律，得到其微小振动的控制方程，用数值解法求解出了振动方程，得到了振子运动的时程响应和轨迹图样。

The ionic space charge in the micro-voids of water tree will produce a period vibration by AC voltage stimulating. Under superposition voltage, the vibration can impel the ion penetrating into the tiny crackle between micro-voids of water tree and lead to a change in the conductivity of water tree. With this the ultra-low frequency spatial current signal of the water tree would be emerged in detecting circuit. The polarization and depolarization of the polar end-group of the PE formed in water tree developing will also contribute to this special signal.

本文分析认为，水树枝中的离子型空间电荷在几种电压共同作用下会发生周期性振动，这种振动会促使水树枝中的导电离子在较低的叠加电压激励下进入连接水树枝微孔的微裂纹，微裂纹导通不仅导致水树枝的电导发生变化，而且在检测回路中会有水树枝老化超低频特征信号电流产生。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了