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.
金属包层长周期光纤光栅可用于对谐振波长的调谐。
Metal coated long period fiber gratings (LPFG) can be used to change the resonance wavelength.
这种较高次包层模谐振将导致极宽带的长周期光栅，论文中还预计了这种长周期光栅未来的应用。
Such higher order cladding mode resonances will result in ultra-broadband LPG. The possible application of such an LPG is predicted.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
Since the characteristics of higher order cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
利用能量曲线的分析方法，建立了类谐振子的周期和系统能量的数学表达式。
The relation between period and energy for the harmonic-like oscillation is obtained by using the analysis method of horizontal curve of energy function.
该方法能有效控制铁磁谐振过电压从混沌状态转移到期望的周期轨道，实现系统状态在混沌和有序之间的转换。
The proposed method can effectively control the ferroresonance over voltage from the chaos to period orbit and implement the transformation of system status between chaotic and ordered situation.
报道了一种分析长周期光纤光栅(LPFG)透射谱谐振波长和衰减率随弯曲曲率变化的方法。
A method to analyze the resonant wavelength and damping decrement of the transmission spectrum of long period fiber grating (LPFG) with bending curvature was reported.
长周期光纤光栅的谐振峰中心波长随温度的变化呈线性关系。
The relationship between the resonant wavelength shift of the novel LPFGs and the applied temperature is linear.
合理地设计金属树枝单元的几何参数，六边形边长以及晶格周期，产生电磁谐振。
The geometric parameters, the hexagonal side length and the lattice period of the metal dendritic array units are reasonably designed to generate electromagnetic resonance.
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.
利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。
Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.
对长周期光纤光栅传输谱谐振波长的应变特性用耦合模理论进行研究，推导出谐振波长应变灵敏度的解析表达式。
The strain sensitivity characteristic of long-period fibre grating (LPFG) was studied by coupled-mode theory and the strain sensitivity analytic equation of the resonant wavelength was deduced.
提出一种新型的阶梯结构周期性紧凑型微带谐振器单元(CMRC)低通滤波器。
A novel microstrip lowpass filter composed of a simple tapered periodical compact microstrip resonant cell (CMRC) was proposed.
它通过常见的谐振波长与周期的关系曲线，不用解耦合模方程就可以直接分析LPFG的振波长的漂移和调谐特性。
Through the curve of resonant wavelength versus period, we present a new method to analyze the shift of resonant wavelength of LPFG during UV laser writing without solving the coupled-mode equations.
提出了在弹簧振子作简谐振动时，利用集成开关型霍尔传感器测量振动周期，以进一步测量物体惯性质量的方法。
The method to measure body's inertial mass is proposed by measuring period of vibration with the integrated hall switch sensor, when spring oscillator is in situation of simple harmonic vibration.
另外，还讨论了周期性谐振腔的热稳条件问题。
The thermostable conditions of Periodic resonators is also discussed.
研究了周期性排列的金属杆阵列的空间电磁谐振行为，实现了负介电常数。
Electromagnetic resonance of a periodic array wires are studied in free space and negative permittivity are realized in a certain frequency range.
而且这种长周期光纤光栅的谐振波长随温度变化而线性变化，谐振峰幅值对温度变化不敏感。
The resonant wavelength and resonant peak amplitude of the gain equalizer can be tuned by means of adjusting the temperature and transverse load independently.
新型长周期光纤光栅在波长不敏感方向其谐振峰幅度和它所受的横向压力呈线性关系；
The relationship between the resonant amplitude and the applied transverse load in the wavelength-insensitive orientation of the novel LPFGs is linear, (3).
谐振子在周期运动中是特别重要的。
The harmonic oscillator is an exceptionally important example of periodic motion.
首次发现了在双折射光纤中写入的长周期光纤光栅存在对偏振不敏感的谐振峰。
A polarization insensitive LPFG operating at a specific wavelength is achieved by writing the LPFG in a birefringence fiber, for the first time.
在此结构中，环形耦合谐振腔的波导周围被刻蚀周期性的空气孔。
In the structure, etching the periodic holes around the waveguide of the ring resonator waveguide does not increase the size of the CROW.
研究揭示了在谐振挤压运动周期内挤压膜的性能变化。
The performance of squeeze film such as the variation of the pressure distribution and the air damping load were analyzed.
为了获得平坦的多波长输出，在谐振腔里使用了一个损耗峰位于1530nm处的长周期光纤光栅，以获得较为平坦的增益谱。
In order to achieve flat multi-wavelength output, a long-period fiber grating with loss peak at 1530 nm is used to obtain flat gain spectrum.
为了获得平坦的多波长输出，在谐振腔里使用了一个损耗峰位于1530nm处的长周期光纤光栅，以获得较为平坦的增益谱。
In order to achieve flat multi-wavelength output, a long-period fiber grating with loss peak at 1530 nm is used to obtain flat gain spectrum.
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