理解大自然对气候变化有怎样的反应需要监视世界各个角落的关键生命周期事件一一花开、叶子的出现、青蛙第一声呼唤春天的鸣叫。
Understanding how nature responds to climate change will require monitoring key life cycle events - flowering, the appearance of leaves, and the first frog calls of the spring - all around the world.
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.
实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。
The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.
将听诊器放至心前区胸壁，可听到每个正常心动周期由「咚「 、 「哒「两声组成。
Will stethoscopic wall of bosom of the area before be being put to the heart, audibility every normal cardiac cycle by " dong ", " da " two composition.
提出一种变长分帧的方法。为了较理想的合成出特定人的自然语音，采用变长分帧方法对特定人的自然语音的四声提取基音周期序列。
For the ideal synthesis, USES a method of changing the long of frame to get pitch periods of given people natural four tones.
声子晶体是由周期性分布的两种或两种以上材料组成的新型功能材料。
Phononic crystal is a new functional material consisting of two or more elastic materials with periodic distributions.
本文从晶格模型出发，同时考虑周期场和电子-声子相互作用对激子能态的影响。
In this paper, the effect of the lattice potential and electron-phonon interaction on the energy states of excitons is studied by using lattice model.
利用逆散射理论，通过测量离体血管的声散射场振幅谱的大小周期，重构了猪的主动脉离体血管的内外半径，重构参数的相对误差<4%。
Inverse scattering theory was applied to reconstruct the inside and outside radii of the aortic blood vessels of a pig by scattering spectrum. The relative errors of reconstruction were less than 4%.
振荡周期随耦合强度增大而减小，说明声子将导致量子比特相干性降低；
The oscillating period decreased with increasing, the electron-LO-phonon coupling strength, and it showed that the existence of phonon resulted in decreasing the coherence of qubit.
振荡周期随耦合强度增大而减小，说明声子将导致量子比特相干性降低；
The oscillating period decreased with increasing, the electron-LO-phonon coupling strength, and it showed that the existence of phonon resulted in decreasing the coherence of qubit.
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