抽样

Methods A blood serum epidemiological investigation was in ordinary people in different regions and different age stages.

采用分地区、分年龄段随机抽样的方法，对普通人群进行血清流行病学调查。

This book gives a brief account of significance and historical development of quality control, emphasizes various types of control charts and acceptance sampling systems and procedures, and gives a brief and direct introduction of probability and statistics.

本书简要概述了质量控制的意义和历史发展过程，重点讲解了各种类型的控制图和抽样检验体系和过程，而对概率和统计知识的介绍非常直观和简单。

ANN model was used to analyze time series and BootStrap method was used to improve the precision of prediction.

该方法采用神经网络技术建立时序数据预报模型，并通过重抽样技术提高预报精度。

RESULTS: The method is based on the bootstrap technique that is used to obtain pseudo-hierarchies of genes from resampled datasets.

结果：该方法是基于bootstrap技术，该技术被用来从重抽样的数据集中获得基因的伪层次。

Recognition is done in canonical space. A three image frame sequence, 5:1 down sampling from the video, is converted to a posture sequence by template matching.

经由样板比对的方法将三张影像合为一个姿态变化序列，此影像序列乃从动作视讯5：1减低抽样获得。

Methods Cluster sampling method was used in the 717 persons aged 60 and over in Yanjiao Developing Area.

采用整群抽样方法对河北省燕郊年龄≥ 6 0岁 717名老年人进行问卷调查。

Cluster sampling and questionnaire of traffic safety consciousness of school students in Shanghai were conducted in this study.

采取整群抽样的方法，同时采用统一编制的"上海市中、小学生交通安全知识认知调查表"进行调查。

Methods Cluster sampling was used, and epidemiological investigation was carried by means of questionaires.

采用整群抽样的方法，运用自编的调查表进行流行病学调查。

Methods The study was performed by systematic and cluster sampling and questionnaire.

采用系统整群抽样的方法，以填写调查表的形式进行问卷调查。

Methods With stratified cluster sampling method,2 519 students were questionnaired in Anhui province.

采用分层整群抽样方法，对安徽省2519名中小学生进行问卷调查。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。