The paper introduces seven factor of DRASTIC model: Depth of water table, Net recharge, Aquifer media, Soil media, Topography, Impact of Vadose Zone and Hydraulic Conductivity.

前言：介绍了DR AST IC模型的七个评价因子：地下水埋深、含水层净补给量、含水层介质类型、土壤类型、地形坡度、包气带介质i的影响和含水层的导水系数。

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Through establishing factor analysis model, this paper obtains seven common factor that affect consumers to use online payment;

其次，通过建立因子分析模型，获得影响消费者使用网上支付平台的七个共性因子；

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