As one of the branches of statistics, time series analysis focuses on the variation characters and trend of discrete ordered data series mainly.
时间序列分析是统计学的分支之一，它的研究对象是离散有序数列的变化特征和变化趋势。
At the same time the space variation of the soil parameter already drive people a cognition, combine to lead into the dependable analysis of the soil engineering gradually.
同时岩土参数的空间变异性已被人们所认识，并逐步引入岩土工程的可靠性分析中。
The joint time-frequency analysis provides more direct and comprehensive knowledge of the transient variation of pulse signals at any time and any point of the transmission line.
联合时频分析可以更直观、更全面地了解脉冲信号在传输线任意时间和任意位置的瞬态变化。
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