The membership function of the fuzzy subsets can be actually obtained witha samplingsurveymethod.
用抽样试验的方法实际求取模糊子集的从属函数。
2
Methods: Census method and samplingsurveymethod were both used to investigate the related data of the second-class large medical equipments in Henan province.
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。
3
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 samplingsurveymethod.