Based on GIS technology, agricultural land gradation was studied applying factor method and modifying method in the centre of Leshan City, Sichuan Province.
以GIS为平台，采用修正法和因素法相结合，对乐山市中区农用地定级进行了研究。
The influencing factors of feat technique in hygiene were investigated in Sichuan with the method of the stratified sampling and the categorical data analysis.
采用分层抽样方法和分类资料统计方法，开展四川省农村卫生适宜技术推广影响因素调查研究。
Projection Pursuit classification method based on the genetic algorithms projection to deliver to the Sichuan county level CDC work carries on the appraisal.
依据基于遗传算法的投影寻踪聚类模型方法对四川省县级疾控机构工作产出进行评价。
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