查询词典 time of vibration

There is, for instance, a kind of steel called invar (from"invariable") which does not change its dimensions as temperature changes; it is valuable for making pendulums, since, if the length of a pendulum changes, its time of vibration changes.

不过也有一两个例外，例如有一种钢叫做殷钢(从"invariable"一词而来)，在温度变化时它的大小尺寸不变；这种钢对于制造钟摆很有价值，因为如果摆长改变，摆动的周期就改变。

There are one or two exceptions. There is, for instance, a kind of steel called invar (from"invariable") which does not change its dimensions as temperature changes; it is valuable for making pendulums , since, if the length of a pendulum changes, its time of vibration changes.

不过也有一两个例外，例如有一种钢叫做殷钢(从"invariable"一词而来)，在温度变化时它的大小尺寸不变；这种钢对于制造钟摆很有价值，因为如果摆长改变，摆动的周期就改变。

The effects of frequency, amplitude and time of vibration on permeability were analyzed by using this function.

利用该函数，分析了振动频率、振幅和时间对渗透率的影响，并将其推广到实际地层。

The analysis indicated that the vibration isolation system under the action of initiative control possesses controllable rigidity and damping characteristics; at the same time by comparing with other electromagnetic structure it was a kind of vibration isolation system with very small vibration isolative power consumption.

分析表明，主动控制作用下的隔振系统具有可控的刚度和阻尼特性，同时与其他电磁结构比较，其是一种隔振功耗很小的隔振系统。

Experimental research on the vibration of single slab and multi ones set in the arch ring is carried out in the first time. Slab vibration divisions along the water flow are proposed and their lists are determined. Laws of vibration distribution along water flow, across the arch ring, in time zone and frequency one are established. The most dangerous condition to slab's stability is obtained by comparing slab vibration in the different downstream depth.

首次对反拱水垫塘拱圈弹性单、多底板块的振动特性进行了试验研究，提出了拱圈底板块沿流程的振动分区，给出了各振动区的界限，得到拱圈单、多底板块振动特征值沿流程及沿拱圈的分布规律，底板块振动的时域和频域特性，对不同下游水位的振动特性进行了比较，给出了对拱圈底板块的稳定最不利的条件。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

5The blasting vibration signals are analyzed by time-energy analysis. Identify the time of detonator priming and ascertain reasonable subordinate interval in millisecond delay blasting to decrease blasting vibration and control the damage of blasting. In this paper, wavelet analysis is used to de-noise the blasting vibration signals.

利用基于小波变换的时－能密度法具有的良好的突出被分析信号能量突变的特点，有效地识别微差爆破中各段雷管的起爆时刻，从而确定微差爆破中合理的微差延时，达到降低爆破震动，控制爆破震动危害的目的。

There is, for instance, a kind of steel called invar (from"invariable") which does not change its dimensions as temperature changes; it is valuable for making pendulums, since, if the length of a pendulum changes, its time of vibration changes.

不过也有一两个例外，例如有一种钢叫做殷钢(从&invariable&一词而来)，在温度变化时它的大小尺寸不变；这种钢对于制造钟摆很有价值，因为如果摆长改变，摆动的周期就改变。

There are one or two exceptions. There is, for instance, a kind of steel called invar (from"invariable") which does not change its dimensions as temperature changes; it is valuable for making pendulums , since, if the length of a pendulum changes, its time of vibration changes.

不过也有一两个例外，例如有一种钢叫做殷钢(从&invariable&一词而来)，在温度变化时它的大小尺寸不变；这种钢对于制造钟摆很有价值，因为如果摆长改变，摆动的周期就改变。

ObjectiveTo observe the effect of vibration massage apparatus on skin temperature by infrared thermal imaging system .Methods30 healthy students of Shanghai university of TCM accepted two operations of vibration massage apparatus-non-vibration and vibration . The temperature diversity was obseved at different time : before operation , after 3min operation, after evaluating apparatus 1, 2, 3,4,5 min by infrared thermal imaging system .

方法上海中医药大学的30名健康大学生先后接受机械振动按摩器的空置和振动两种操作，用红外热像仪分别于操作前0 s、操作3 min后即刻、撤离仪器后1 ，2，3，4 min和5 min观察受试者以心俞为中心的手掌大小区域的温度的动态变化，并用分析软件处理相关温度数值，将结果进行统计学分析。

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