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.
还讨论了WWB的多时间尺度性，以及WWB过程中气象要素场变化特征等问题。
The multiple - scale features and variation of meteorological element fields of the WWB process are also discussed.
在此基础上对低温冷害指数进行经验正交分解和小波分析，得到其时空变化规律及多时间尺度特征。
By experience orthogonal function analysis and wavelet analysis on chilling damage indices, it showed spatial-temporal variation in the regulation and multiple-time-scale characteristics.
结果表明，厄尔尼诺事件与黑龙江省气温和降水之间的相关具有多时间尺度的特征；
The results show that the correlations between E1 Nino and the temperature and precipitation in Heilongjiang Province have multi-time scale characteristics;
分析结果表明，洪涝灾害系统的变化具有分形特征，农田成灾面积时间序列的平均可预测时间尺度为8～9年；
The results indicate that flood disaster systems have fractal characteristics, average time-scale of forecasting inundated area of cropland is 8~9 year.
分析结果表明，洪涝灾害系统的变化具有分形特征，农田成灾面积时间序列的平均可预测时间尺度为8～9年；
The results indicate that flood disaster systems have fractal characteristics, average time-scale of forecasting inundated area of cropland is 8~9 year.
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