而且，伦德博士测算出“造父变星”的脉动周期能够用适当的微中子束加以调整。
Dr Learned, however, reckons the pulse-period of a Cepheid could be modulated by a suitable beam of neutrinos.
应用数值模拟方法对水下爆炸产生的诸如气泡脉动规律、脉动周期、水中冲击波压力的变化等特性进行了研究。
The characteristics of underwater explosions such as pulsation law and pulsation cycle of bubbles, and pressure time histories of shock waves in water were investigated numerically.
通过水中爆炸水击波及其多次脉动的观测，分析了水击波及其多次脉动的传播速度、脉动周期、频率及能量分布等特性。
Through observation on shock wave and multiple pulsating caused by underwater blasting, the velocity, period, frequency and energy of shock wave and multiple pulsating are analysed.
这个过程可能周而复始，周期性地重复--天文学家称之为"脉动"对不稳定性超新星--直至恒星失去足够的物质，在普通超新星的形态中走到生命的尽头。
The cycle can repeat itself in pulses—astronomers call this case a “pulsational” pair-instability supernova—until the star loses enough mass to end its life in an ordinary supernova.
最近一个周期中，M82的重力增强了M81周围密度波的脉动，导致M81的旋臂更浓密。
Last go-round, M82's gravity likely raised density waves rippling around M81, resulting in the richness of M81's spiral arms.
造父是种特殊的恒星，它能以可以预测的方式周期脉动，就像I型超新星，他们被当做是一样的，不管他们在那里。
Cepheids are a special type of star that pulsates in a predictable way, and like the type 1a supernova, they are assumed to be the same, no matter where they are located.
为了记录短周期地磁脉动，我们研制了81型照相记录感应式地磁脉动观测系统。
We have made a system of optically-recording induction magnetometer of 81-type, for micropulsation observations along Eastern Coast of China.
建立了间歇精馏无回流操作过程的数学模型，采用四阶龙格库塔法求解初值问题，计算无回流开工过程及间歇精馏脉动操作过程中无回流周期内各塔板浓度变化的动态特性。
The dynamic characteristic of concentration change on plates of batch rectification column in no reflux start up process and in no reflux period of pulse operation process have been calculated.
确定振动是由入口调节门后中心涡流引起的气流周期性高脉动造成的。
Vibration is caused by periodic high pulsation of airflow resulted from the center eddy behind the inlet damper.
根据两相流的均相模型，对压力降型脉动的周期和振幅进行了数值计算。
Based on the homogeneous model, the numerical computation for the oscillation period and amplitude of pressure drop type instability was conducted.
泵输出的周期性脉动流体的压力脉动，是引起流体谐振、激励管路振动和噪声的主要原因。
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise.
使用快关调节阀控制能激励周期蒸汽压力脉动。
Periodic pressure undulation may be incited by fast valving control.
由于采样时刻的电压和磁链误差，可在下一个控制周期内得到补偿，因此转矩和磁链的误差始终很小，二者的脉动很小。
The voltage and flux errors at the sampling instant can then be compensated for in the next control period, so the errors are always kept small, which leads to small fluxes and torque ripple.
其评价指标主要为场地土类型及场地类别、场地液化势和场地地脉动卓越周期。
The evaluation parameters mainly include soil type of the site, category of the site, liquefying power of the site, and remarkable cycle of site pulsation.
在用节流流量计测量周期性脉动气流的平均流量时，需要在脉动源与流量计之间添加稳压箱以减弱脉动对流量计的影响。
For measuring the mean flowrate of pulsating gas flow, damping chamber is set between the pulsating source and the flowmeter to damp the pulsating effects.
采用龙格-库塔数值方法计算了气泡脉动半径、周期及水中压力，计算结果与实测数据吻合较好。
The radius period of oscillation of the bubble and the water pressures are calculated numerically with Runge-Kutta method. The calculating results are unanimous with that of experiments.
各测点流速脉动过程实测资料表明，各测点流速的脉动过程线基本类似，并具有大小不同的准周期。
The velocity pulsing process observation data of all the measuring points indicate that the velocity pulsing process of all the measuring points is almost similar and have different quasi-periodic.
本文通过尾水管内流动的模拟，导出了由尾水涡带所引起的周期性振动的振动频率和脉动压力的计算公式。
This paper gives the flow simulation of hydraulic turbine draft tubes. Then, the calculation formula of the frequency and force of vibration of the draft tube are derived.
当驱动轮转矩不变时，牵引力随啮合点的变化而呈周期性变化。每个轮齿受到的销轨反力是脉动的，脉动幅值较大。
The relative speed between driving wheel and pin rail varies with sinusoidal function. 2 When the torque of driving wheel is unchanged, the traction force varies with the...
当驱动轮转矩不变时，牵引力随啮合点的变化而呈周期性变化。每个轮齿受到的销轨反力是脉动的，脉动幅值较大。
The relative speed between driving wheel and pin rail varies with sinusoidal function. 2 When the torque of driving wheel is unchanged, the traction force varies with the...
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