采取抽样调查法和侵蚀断面测量法，对陕西北部山丘区公路开挖边坡侵蚀进行了定量分析。
The erosion of cutting-slope of highway in north Shaanxi Province is investigated and evaluated by measuring the erosion depth on slope surface through 43 sampling sites.
方法：采用普查法和抽样调查法相结合，对河南省乙类大型医用设备的相关资料进行了调查。
Methods: Census method and sampling survey method were both used to investigate the related data of the second-class large medical equipments in Henan province.
由于网格法没有考虑水土保持措施因子，调查得到的土壤侵蚀量结果比采用抽样调查法得到的结果偏大。
Because the soil and water conservation factor was not concluded in net method, the soil erosion modulus calculated with net method was higher than that calculated with sampling survey method.
校正估计法已被大量运用于抽样调查中，它利用辅助信息构造的校正权重提高了对总体总值(或均值)的估计精度。
Calibration estimation which USES known auxiliary information at the estimation stage to improve the precision of the estimators of totals and means has been widely used in survey sampling.
方法问卷法、跨文化比较法及随机抽样调查，按各村18岁至45岁人口比例抽取样本。
Methods Applying answering questionnaires, contrasting cross culture and getting the sample at random. Then we chose each village came from 18 to 45 year-old sample.
方法抽样调查，依据《食品卫生法》的要求，现场调查。
Methods Sampling method was used. On basis of food hygiene law , a spot investigation was conducted.
采用问卷调查法，对我校0 1、02级健美操专项的学生进行了抽样调查，调查的项目主要是健美操教学的内容和形式。
By using questionnaires, we made a sampling investigation on students specializing in calisthenics in Grade 01 and 02. Investigation items include teaching content and teaching model.
采用问卷调查法，对我校0 1、02级健美操专项的学生进行了抽样调查，调查的项目主要是健美操教学的内容和形式。
By using questionnaires, we made a sampling investigation on students specializing in calisthenics in Grade 01 and 02. Investigation items include teaching content and teaching model.
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