准周期的

Considering enough first integrals,such as conservation of energy and angular momentum,the system is integrable by Liouville's theorem.

利用能量积分，根据惠特克定理对系统的动力学方程进行降阶，并根据旋转数给出系统作周期或准周期运动的判别条件。

The curve of third harmonic sound pressure level(SPL3)is alsoa "periodic function".The period length is about"first resonancefrequency" of the tube Δf=f0=c0/(2L).The magnitude of SPL3 canbe predicted by Coppens theory(with one of the parameters modified).

三次谐波声压级变化曲线为一"准周期"函数，周期长度为驻波管的第一共振频率值Δf＝f0＝C0/2L，用Coppens所推导的"共振"时公式，计算三次谐波共振峰的量值，表明仍存在差异，只有经过参数修正才能所得结果。

The properties of kilohertz quasi periodic oscillation probably contain information close to the neutron stars in the low mass X-ray binaries system.

千赫兹准周期振荡包含了LMXB中中子星附近的信息。

The quasi periodic regularly structure of tissue peaks in the power cepstrum of ultrasonic backscatter.

本文论述了软组织散射元准周期规则分布导致超声散射信号相干峰产生的机理，提出利用AR幅度倒谱估计散射元平均间距及其变化，结合组织外加应力来估计软组织内局部杨氏弹性模量。

These measurements of time delay seem to favor the adiabatically expanding plasmon model.

在红外波段不仅观测到了频繁的光变，还发现可能存在准周期震荡。

Using the noncollinear quasi-phase matching technology,"clear light source" sequence of different colors at different positions can be obtained in a two-dimensional LiNbO3 nonlinear photonic crystal with ten-fold quasi-periodic superlattice.

在具有二维十重准周期超晶格结构的铌酸锂非线性光子晶体中，利用非共线准相位匹配谐频的方法，可在不同角度上获得不同颜色的&纯光源&光斑序列。

In addition, the summer AO mode changes much between before and after the abrupt change, especially the pleion in the East Asian land.

从夏季AO指数和EASM指数奇异谱分析的重建序列中发现，它们的长期趋势以及准20-30a周期的重建序列的相关系数较高，而它们的年际的周期的重建序列的相关系数不显著。

The length and amplitude of the quasi-periodic signals are change with time.

这些准周期分量的周期长度和振幅是随着时间变化的，文中给出了它们的时变图象并讨论了它们的时变特征。

Our work exhibited the possible application of quasi-crystal and quasi-periodic structure materials in nonlinear optical field.

这是准晶、准周期材料研究领域第一个有应用价值的理论和实验相结合的工作。

Finally, to get the exclusive solution of a certain structure, the realization technology of electric and magnetic boundary conditions, as well as the quasi-periodic boundary condition is studied.

最后，对确定的高频结构，为了得到唯一确定的电磁场解，对基于有限积分理论的电边界、磁边界以及周期结构的准周期边界的数值实现技术进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。