Correlation predicates typically compare some key value in the event, such as a unique trip identifier, with a metric containing the same key.
关联谓词通常将事件中的某个键值(例如唯一旅行标识符)与包含相同键的度量作比较。
Methods: to introduce the correlation principal components regression (CPCR) and compare the difference between the CPCR and top-down PCR.
方法：介绍相关主成分回归c PCR法并将该法与传统的主成分回归进行比较。
It adopts space data characteristic compare, cluster analysis and correlation analysis, and synthetically utilizes GIS data model and the technology of computer to analyze the distribution network.
采用空间数据特征比较、时域聚类、相关性分析，综合利用配电网络GIS数据模型和计算机技术对配电网络进行深入的研究。
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