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The approximate analytical expression of the periodic orbit of the rotor bearing system is obtained by combining GSM with the harmonic balance method.

将谐波平衡方法与GSM算法相结合，对转子轴承系统周期轨道的近似解析表达式进行了求解。

An improved semi-discretization method based on Magnus-Guassian truncation was presented for analyzing the stability of periodic orbit of the DDEs.

对该动力学模型进行稳定性分析，可以确定稳定的铣削参数域及稳定性图。

It includes the undertermined fundamental frequency approaching zero and the collision of the periodic orbit with the saddle point.

然后分别依据系统的待定固有频率趋于零和周期轨道趋近于鞍点两条途径获得了强非线性振动条件下系统同宿分岔的解析判据。

To characterize the deterministic dynamics in heart rhythm, the unstable periodic orbit analysis were the RR interval time series of healthy young men.

为刻划心脏节律存在的确定性动力学特征，运用不稳定周期轨道分析方法对健康青年人的RR间期时间序列数据进行分析。

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.

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。

In other cases, The simulation gives that as the coefficient of square velocity item varies from small to large the respondence of the chaos system change from chaos change to stable periodic orbit and then to dissipation movement.

然后通过仿真实例证实，在其他情况下，当速度平方项系数从小到大变化时，系统的混沌响应经历了从混沌突变到稳定的周期运动在突变到发散运动的过程。

Finally, for resolving the waiting problem of the OGY method, we suggest a"middle"periodic orbit method to guide the controlled orbit to close in on the target as soon as possible.

最后，为了改善OGY方法在控制实施前需要等待较常时间的缺陷，我们还提出了"中间周期轨"方法，来引导受控轨道尽快进入目标轨道附近。

The analytical method is always used due to the large amount of the objects and not very high accuracy of forecasting. A method based on the position and velocity derived from the mean orbit elements directly is given, which is to avoid the problem of singularity in calculating the periodic terms of orbit elements variation, thus the process and software can be simplified.

在已有分析法得到t时刻平均根数的基础上给出一种轨道预报方法，由t时刻的平均根数给出该时刻卫星的位置和速度，在此基础上将地球非球形引力摄动的周期项直接用卫星直角坐标的位置和速度分量表示，这样可以避免在计算轨道根数变化的周期项时出现的奇点问题，从而对根数的选择无特殊要求，可适用于各种轨道，简化预报程序和相应的软件，提高预报效率。

The operation of periodic flow reversal is a new kind of unsteady-state reaction techniques.

流向变换周期操作是一种非稳态催化反应新技术，其反应器模型一般为非线性反应－对流－扩散方程的新型定解问题。

The diesel engine crank is one of the parts with high technology requirments and high cost. It is easy to be damaged for bearing heavy periodic reversal load.

曲轴是柴油机中技术要求高，造价较昂贵的部件之一，由于其工作中承受较大的周期性的交变载荷，故容易损坏。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。