The activity of festival is like the distributing events, so it can be analyzed by the method of event analysis.
节日活动如同分布式的事件，因此可运用事件分析方法来支持节日营销策略的制定。
Sequential substitution is a calculating method widely used in economic activity analysis of enterprises.
连环替代法是企业经济活动分析中广泛应用的一种计算方法。
The anomalous characteristic of the swarm activity is analyzed using the precursor swarm distinguishing equation constructed by the principal component analysis method.
应用主成分分析方法构建了前兆震群判别方程，对震群活动的异常特征进行了分析。
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