stratified造句
151, In this study, stratified sampling is used to select samples in Gansu Province.
152, The fuel injector can realize homogeneity and fuel stratified injection in a cylinder, thereby improving the efficiency of the motor and environment conservation.
153, The influencing factors of feat technique in hygiene were investigated in Sichuan with the method of the stratified sampling and the categorical data analysis.
154, Methods General investigation was adopted to understand the water supply situation in rural areas and stratified random sampling was used to monitor the water quality.
155, In general, all free - surface liquid motions are stratified flows.
156, Methods: Using the method of multistage stratified sampling, 3000 people were investigated with "health and health system responsiveness", the questionnaire coming from WHO.
157, Computer ownership and access are highly stratified along lines of weal th, race, education, and geography.
158, The syllogistical rules may be analyzed into constitutive ones, general ones and educed ones, which are stratified differently.
159, In this paper, we propose a stratified multiobjective geometric programming model for the optimal cultivation in agriculture.
160, Stratified and Rational Distributed Sampling method was recommended to determine the rational sampling quantity of soil nutrients which showed obviously negative frequency distribution.
161, Methods 3034 children between 0 to 6 years in three Gorges reservoir were selected by stratified random sampling method.
162, The paper proposes new separate ratio estimators for population mean using known skewness coefficient of auxiliary variable in stratified random sampling.
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