论文部分内容阅读
本文根据食用油价格序列的特性定义其适用的时间序列,并运用SAX方法进行数据处理。在对紧密型频繁序列进行了定义后,提出了运用投影数据库找寻紧密型频繁序列的方法。最后给出基于紧密型频繁序列片断的食用油价格变化趋势规律。
This article defines the applicable time series according to the characteristics of edible oil price series and uses SAX method to process the data. After the definition of compact frequent sequences, a method of using projection databases to find compact frequent sequences is proposed. Finally, the trend of edible oil price based on the close-frequent sequence is given.