但对于多时间尺度的电力系统模型降阶问题而言，还必须研究快流形的存在性及其基本特征，以给出固定系统慢动态的降阶条件。
But for a multi time scale power system, existence and fundamental characteristics of fast manifolds must also be studied in order to obtain the model reduction condition of fixing slow dynamics.
年降水量与夏季降水量在时间尺度和周期特征方面非常相似。
The annual precipitation and summer precipitation are very similar in terms of time scales and cycle characteristics.
利用线性分析方法，分析濮阳多时间尺度气温的变化特征及气候趋暖对粮食生产的影响。
The characteristics of multi-timescale temperature change in Puyang, Henan Province and its effects on grain production caused by the warming-up climate are analyzed.
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