spectrum series

In this paper an expression for the spectrum of satellite orbit perturbation, induced by all zonal and tesseral harmonics of the earth's gravitational field, is derived based on Lie series.

本文基于Lie级数的方法对卫星轨道摄动进行了频谱分析。这种摄动是由地球引力场的所有带谱调和项和田谐调和项引起的。

The study of some problems in setting up railway track spectrum using time series analysis

时序分析在确立铁路轨道谱中若干问题的研究

Application of Time Series Method in Spectrum Analysis of Convertor Model

时序方法在转炉模型谱分析中的应用

Altimeter data were corrected with tidal model and was interpolated in spatial domain to obtain time series data. 3D energy-frequency-time spectrum and sea surface anomaly ( SSA) were obtained by HHT from time series data.

对南海卫星高度计资料进行潮汐校正和空间插值得到时间序列数据，对这些时间序列数据进行HHT，得到了南海海平面高度变化的三维能量-频率-时间谱和海平面高度距平（SSA）。

The testing results show that fatigue crack growth is stagnated by overload and it is urged by programm spectrum of increased and decreased. It was deleterious to wheel longevity by a series of quick-firing.

试验结果表明，过载使裂纹扩展停滞，递增、递减程序谱疲劳裂纹扩展速率明显加快，列车运行中连续急刹车方式对车轮使用寿命不利。

The results showed that the historical earthquakes ( Ms ≥ 5) in this area have outstanding period of 250 years and the term between maximum value of seismic series spectrum since 1970 is 31 months.

结果表明：该地医历史上M≥5.0级地震存在着250年左右的卓越周期；1970年以来的地震序列谱的最大峰值的时间是在31个月时出现的。

The power spectrum of wind speed time series sample is coincident with the aim power spectrum curve.

得到的风速时程样本的功率谱密度与目标曲线吻合很好。