以前算过-,这是能量守恒，为了算出,简谐振荡的周期，我们求时间导数。
We've done this before-- this is the conservation of energy, and in order to find the period of the simple harmonic oscillation, we take the time derivative.
我向你们提过的最，惊奇的东西之一就是，振荡的周期，和物体的质量，毫无关系。
One of the most remarkable things I just mentioned to you is that the period of the oscillations is independent of the mass of the object.
如果在上面,悬挂1公斤物质，我能够计算出,振荡的周期，1除以周期,等于频率，我相信,等于大概38赫兹。
So if now I hang on it a mass of one kilogram, I can calculate the period of one oscillation, and one over the period F is the frequency F, and I believe that is something like 38 hertz.
人们希望温度的时间系列尽可能地长，以便能研究各种波的振荡周期。
The time series of temperature are expected to be the longest possible so as to examine various modes of oscillation periods.
分析了电力系统在周期性负荷扰动下的振荡失稳问题。
The power system instability caused by oscillation under periodical load disturbance was analyzed.
南海季风爆发期间存在明显的季节内振荡，有两个显著振荡周期：一个峰值为20~30天，另一个峰值为40~50天。
There existed obvious intraseasonal oscillation and two significant periods of SCSSM , one was about 20~30 days, the other about 40~50 days.
有连续在这些原子之间的振荡周期。
There is a continuous cyclical vibration among and between those atoms.
揭示出冷空气的向南传播主要是一种低频模态的10—20天周期的振荡。
It has been revealed that the propagation of cold air mainly shows a mode of 10—20 day period oscillation.
用关联函数作为反馈，可使系统从混沌到定态或混沌态到周期振荡，甚至可以实现从混沌态到指定的定态输出。
The correlation functions can be used as feedback signal to control the systems from chaos to steady state, chaos to periodic oscillation, or even from chaos to preset output.
在给定各周期广告水平下，给出了零售商最优的动态定价策略，分析了零售商定价规律，发现其定价规律具有“振荡”性，并趋近于一定值。
For a given advertising level of each period, the optimal dynamic pricing strategy of the retailer was given and the rules of pricing were analyzed.
采用非稳态数学模型，通过数值模拟对周期性矩型槽通道内流动和换热的振荡特性进行了研究。
Based on an unsteady model, the oscillatory convection heat transfer is studied numerically in the periodical channels with periodically grooved parts.
三波共振相互作用低频振荡周期与初始扰动振幅有很强的相关关系；
The low-frequency fluctuation periods and the initial amplitudes have close relationship in the resonance interaction.
应用现代差分方程理论对这些数学模型解的渐近性态与周期振荡进行了详细的讨论研究。
The asymptotical behaviors and periodic oscillations have been studied by applying the modern theories of difference equations.
得到的同步振荡周期和激光的饱和值与估计的值相符合。
The period of synchronous oscillation and saturation value of laser intensity agree with estimated one.
一个振荡周期的一部分，客户的，在您过滤泥沙，然后积累另一波销售在这样的法律。
One oscillation period, as part of customers out, after you filter sediment, and then accumulated by another wave of sales are in such a law.
结果表明电子的透射系数随外环半长及两个气泡半周长的改变均做周期性振荡。
We found that the transmission of electrons oscillates periodically with the change of ring's half length or two bubbles' half circumferences.
温度存在31 ~45年的周期振荡。
发现：1、活动层不同深度的地温具有不同时间尺度的振荡周期。
The following results are discovered: 1) In this area, its active layer has a different geotemperature oscillatory period at different depths and different time scales.
1991年江淮梅雨期出现了三次暴雨过程，降水呈现显著的20-25天振荡，该周期明显短于海两期40天振荡的气候周期。
There were three heavy rainfall procedures over the Jianghuai basin in 1991, and the variance of rainfall showed 20 - 25 days oscillation remarkably, which was shorter than 40 days climate peried.
皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。
There a good coincidence in the calculation of shield layer current and measuring results in the aspect of waveform, oscillating circle and attenuation law.
电力系统强迫功率振荡为持续的周期性小扰动所引起低频振荡现象。
Power System forced power oscillation is a kind of low frequency oscillation caused by persistent periodic small disturbance.
各区域的极端温度值时间变化存在较大差异，但是周期分析显示，各区域极端温度值的年代际周期振荡具有全省一致性。
There are distinct differences of the trends of extreme temperature variation between different regions, but the periodic variation analysis show that the inter-decadal variations are consistent.
值得一提的是可得出原子间耦合作用强度对纠缠量的非线性效应，并且纠缠量展现出与原子反转粒子数一致的周期振荡现象。
It should be noted that the atomic coupling coefficient exhibits the nonlinear effect and the entanglement measure oscillates periodically in accordance with atomic population inversion.
认为云在准三年周期振荡过程中起着重要作用，而在准半年周期振荡中自身反馈过程则是主要的过程。
It is found that clouds play an important role in the feedback process of quasi three-yearly oscillation, and that the self feedback process is important in the quasi half-yearly oscillation.
研究表明，燃烧“喘息”现象是由燃烧压力周期波动引起的，说明炉膛内存在燃烧振荡。
Study results indicate that puffing combustion is occasioned by periodical pressure oscillations, which demonstrates the existence of combustion oscillations in the furnace.
从自激振荡的稳定性入手，分别讨论了热声网络的周期时均和时变数学模型。
Based on the stability of self-oscillation of thermoacoustic engine. models of periodic average and time-varied are investigated respectively.
结果表明，格陵兰岛东西两侧海冰面积呈显著反相变化，并且具有明显的年际和年代际周期性振荡。
The results point out that the sea ice extent oscillations on the west and east sides of Greenland island show inverse variation with distinct interannual and interdecadal circles.
结果表明，格陵兰岛东西两侧海冰面积呈显著反相变化，并且具有明显的年际和年代际周期性振荡。
The results point out that the sea ice extent oscillations on the west and east sides of Greenland island show inverse variation with distinct interannual and interdecadal circles.
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