periodic oscillations

The basic observational data of Quasi-periodic Oscillations ( QPO) in Low-mass X-ray Binaries ( LMXB) are described systematically in this paper.

本文系统地介绍了低质量X射线双星（LMXB）中的准周期振荡现象的主要观测事实。

It is also found that the relative importance of both the interaction and self-feedback action in, land-air system for above-mentioned two periodic oscillations is different.

另外还发现系统的自反馈作用和相互作用在两类周期振荡过程中的相对重要性是不同的。

Rapid variations are usually found in the radiation from black hole ( BH) systems and other astrophysical compact objects. Some X-ray variations are quasi-periodic, stationary and continuing, which are called Quasi-Periodic Oscillations ( QPOs).

黑洞等致密天体的辐射通常呈现出快速的变化，有些x射线光变表现出持续稳定的近似周期性，被称为准周期振荡（QPO）。

In terms of these quasi-periodic oscillations, a statistical forecast scheme has been designed, with which a set of eight successive pentad mean height forecast at 500 mb level over the Northern Hemisphere can be made.

利用这一特征，设计了一个用周期外延叠加的预报方案。每次接连预报未来8个候的北半球500毫巴候平均高度。

, shows that there are periodic oscillations of 2~ 6 years in the index of sea-land thermal difference, which is similar to that of summer rainfall in ShanDong Province.

结果表明，海陆热力差指数是1种较适合研究山东夏季降水的东亚夏季风指标。

Due to the strong interplay with the other welding variables and periodic oscillations induced by the formation and detachment of droplet, the determination of WFS is very complex.

由于与其它焊接参数强烈耦合、以及熔滴周期性过渡的影响，送丝速度的确定非常复杂。