Firstly, classification index system was set up, then was selected in 22 original variables by the principal component analysis.
首先建立指标体系，并运用主成分分析法对22个类型划分指标进行筛选。
The foundation, steps and notes for establishing classification management responsibility system of cost expense index are introduced.
介绍了建立成本费用指标归口分级管理责任制度的基础、步骤及应注意的问题。
The definition, classification, index system and work flow of early - warning of water resources security was expatiated.
分别阐述了水资源安全预警的定义、分类、指标体系和预警流程等。
应用推荐